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SubjectRe: Linux 4.9.225
Date
diff --git a/Documentation/networking/l2tp.txt b/Documentation/networking/l2tp.txt
index 4650a00ed012..9bc271cdc9a8 100644
--- a/Documentation/networking/l2tp.txt
+++ b/Documentation/networking/l2tp.txt
@@ -177,10 +177,10 @@ setsockopt on the PPPoX socket to set a debug mask.

The following debug mask bits are available:

-PPPOL2TP_MSG_DEBUG verbose debug (if compiled in)
-PPPOL2TP_MSG_CONTROL userspace - kernel interface
-PPPOL2TP_MSG_SEQ sequence numbers handling
-PPPOL2TP_MSG_DATA data packets
+L2TP_MSG_DEBUG verbose debug (if compiled in)
+L2TP_MSG_CONTROL userspace - kernel interface
+L2TP_MSG_SEQ sequence numbers handling
+L2TP_MSG_DATA data packets

If enabled, files under a l2tp debugfs directory can be used to dump
kernel state about L2TP tunnels and sessions. To access it, the
diff --git a/Makefile b/Makefile
index 3e58c142f92f..d17a2ad3cc4d 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
VERSION = 4
PATCHLEVEL = 9
-SUBLEVEL = 224
+SUBLEVEL = 225
EXTRAVERSION =
NAME = Roaring Lionus

diff --git a/arch/arm/include/asm/futex.h b/arch/arm/include/asm/futex.h
index cc414382dab4..561b2ba6bc28 100644
--- a/arch/arm/include/asm/futex.h
+++ b/arch/arm/include/asm/futex.h
@@ -162,8 +162,13 @@ arch_futex_atomic_op_inuser(int op, int oparg, int *oval, u32 __user *uaddr)
preempt_enable();
#endif

- if (!ret)
- *oval = oldval;
+ /*
+ * Store unconditionally. If ret != 0 the extra store is the least
+ * of the worries but GCC cannot figure out that __futex_atomic_op()
+ * is either setting ret to -EFAULT or storing the old value in
+ * oldval which results in a uninitialized warning at the call site.
+ */
+ *oval = oldval;

return ret;
}
diff --git a/arch/arm64/kernel/machine_kexec.c b/arch/arm64/kernel/machine_kexec.c
index bc96c8a7fc79..3e4b778f16a5 100644
--- a/arch/arm64/kernel/machine_kexec.c
+++ b/arch/arm64/kernel/machine_kexec.c
@@ -177,7 +177,8 @@ void machine_kexec(struct kimage *kimage)
/* Flush the reboot_code_buffer in preparation for its execution. */
__flush_dcache_area(reboot_code_buffer, arm64_relocate_new_kernel_size);
flush_icache_range((uintptr_t)reboot_code_buffer,
- arm64_relocate_new_kernel_size);
+ (uintptr_t)reboot_code_buffer +
+ arm64_relocate_new_kernel_size);

/* Flush the kimage list and its buffers. */
kexec_list_flush(kimage);
diff --git a/drivers/base/component.c b/drivers/base/component.c
index 08da6160e94d..55f0856bd9b5 100644
--- a/drivers/base/component.c
+++ b/drivers/base/component.c
@@ -162,7 +162,8 @@ static int try_to_bring_up_master(struct master *master,
ret = master->ops->bind(master->dev);
if (ret < 0) {
devres_release_group(master->dev, NULL);
- dev_info(master->dev, "master bind failed: %d\n", ret);
+ if (ret != -EPROBE_DEFER)
+ dev_info(master->dev, "master bind failed: %d\n", ret);
return ret;
}

@@ -431,8 +432,9 @@ static int component_bind(struct component *component, struct master *master,
devres_release_group(component->dev, NULL);
devres_release_group(master->dev, NULL);

- dev_err(master->dev, "failed to bind %s (ops %ps): %d\n",
- dev_name(component->dev), component->ops, ret);
+ if (ret != -EPROBE_DEFER)
+ dev_err(master->dev, "failed to bind %s (ops %ps): %d\n",
+ dev_name(component->dev), component->ops, ret);
}

return ret;
diff --git a/drivers/dma/tegra210-adma.c b/drivers/dma/tegra210-adma.c
index 2d4aeba579f7..c16c06b3dd2f 100644
--- a/drivers/dma/tegra210-adma.c
+++ b/drivers/dma/tegra210-adma.c
@@ -793,7 +793,7 @@ static int tegra_adma_probe(struct platform_device *pdev)
ret = dma_async_device_register(&tdma->dma_dev);
if (ret < 0) {
dev_err(&pdev->dev, "ADMA registration failed: %d\n", ret);
- goto irq_dispose;
+ goto rpm_put;
}

ret = of_dma_controller_register(pdev->dev.of_node,
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 25c006338100..4630b58634d8 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -353,6 +353,7 @@
#define USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349 0x7349
#define USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7 0x73f7
#define USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001 0xa001
+#define USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_C002 0xc002

#define USB_VENDOR_ID_ELAN 0x04f3

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index fba655d639af..1207102823de 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -1332,6 +1332,9 @@ static const struct hid_device_id mt_devices[] = {
{ .driver_data = MT_CLS_EGALAX_SERIAL,
MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
+ { .driver_data = MT_CLS_EGALAX,
+ MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
+ USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_C002) },

/* Elitegroup panel */
{ .driver_data = MT_CLS_SERIAL,
diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c
index eaa312bc3a3c..c4066276eb7b 100644
--- a/drivers/i2c/i2c-dev.c
+++ b/drivers/i2c/i2c-dev.c
@@ -47,7 +47,7 @@
struct i2c_dev {
struct list_head list;
struct i2c_adapter *adap;
- struct device *dev;
+ struct device dev;
struct cdev cdev;
};

@@ -91,12 +91,14 @@ static struct i2c_dev *get_free_i2c_dev(struct i2c_adapter *adap)
return i2c_dev;
}

-static void put_i2c_dev(struct i2c_dev *i2c_dev)
+static void put_i2c_dev(struct i2c_dev *i2c_dev, bool del_cdev)
{
spin_lock(&i2c_dev_list_lock);
list_del(&i2c_dev->list);
spin_unlock(&i2c_dev_list_lock);
- kfree(i2c_dev);
+ if (del_cdev)
+ cdev_device_del(&i2c_dev->cdev, &i2c_dev->dev);
+ put_device(&i2c_dev->dev);
}

static ssize_t name_show(struct device *dev,
@@ -542,6 +544,14 @@ static const struct file_operations i2cdev_fops = {

static struct class *i2c_dev_class;

+static void i2cdev_dev_release(struct device *dev)
+{
+ struct i2c_dev *i2c_dev;
+
+ i2c_dev = container_of(dev, struct i2c_dev, dev);
+ kfree(i2c_dev);
+}
+
static int i2cdev_attach_adapter(struct device *dev, void *dummy)
{
struct i2c_adapter *adap;
@@ -558,27 +568,23 @@ static int i2cdev_attach_adapter(struct device *dev, void *dummy)

cdev_init(&i2c_dev->cdev, &i2cdev_fops);
i2c_dev->cdev.owner = THIS_MODULE;
- res = cdev_add(&i2c_dev->cdev, MKDEV(I2C_MAJOR, adap->nr), 1);
- if (res)
- goto error_cdev;
-
- /* register this i2c device with the driver core */
- i2c_dev->dev = device_create(i2c_dev_class, &adap->dev,
- MKDEV(I2C_MAJOR, adap->nr), NULL,
- "i2c-%d", adap->nr);
- if (IS_ERR(i2c_dev->dev)) {
- res = PTR_ERR(i2c_dev->dev);
- goto error;
+
+ device_initialize(&i2c_dev->dev);
+ i2c_dev->dev.devt = MKDEV(I2C_MAJOR, adap->nr);
+ i2c_dev->dev.class = i2c_dev_class;
+ i2c_dev->dev.parent = &adap->dev;
+ i2c_dev->dev.release = i2cdev_dev_release;
+ dev_set_name(&i2c_dev->dev, "i2c-%d", adap->nr);
+
+ res = cdev_device_add(&i2c_dev->cdev, &i2c_dev->dev);
+ if (res) {
+ put_i2c_dev(i2c_dev, false);
+ return res;
}

pr_debug("i2c-dev: adapter [%s] registered as minor %d\n",
adap->name, adap->nr);
return 0;
-error:
- cdev_del(&i2c_dev->cdev);
-error_cdev:
- put_i2c_dev(i2c_dev);
- return res;
}

static int i2cdev_detach_adapter(struct device *dev, void *dummy)
@@ -594,9 +600,7 @@ static int i2cdev_detach_adapter(struct device *dev, void *dummy)
if (!i2c_dev) /* attach_adapter must have failed */
return 0;

- cdev_del(&i2c_dev->cdev);
- put_i2c_dev(i2c_dev);
- device_destroy(i2c_dev_class, MKDEV(I2C_MAJOR, adap->nr));
+ put_i2c_dev(i2c_dev, true);

pr_debug("i2c-dev: adapter [%s] unregistered\n", adap->name);
return 0;
diff --git a/drivers/i2c/muxes/i2c-demux-pinctrl.c b/drivers/i2c/muxes/i2c-demux-pinctrl.c
index 3e6fe1760d82..a86c511c29e0 100644
--- a/drivers/i2c/muxes/i2c-demux-pinctrl.c
+++ b/drivers/i2c/muxes/i2c-demux-pinctrl.c
@@ -270,6 +270,7 @@ static int i2c_demux_pinctrl_probe(struct platform_device *pdev)
err_rollback_available:
device_remove_file(&pdev->dev, &dev_attr_available_masters);
err_rollback:
+ i2c_demux_deactivate_master(priv);
for (j = 0; j < i; j++) {
of_node_put(priv->chan[j].parent_np);
of_changeset_destroy(&priv->chan[j].chgset);
diff --git a/drivers/iio/dac/vf610_dac.c b/drivers/iio/dac/vf610_dac.c
index c4ec7779b394..190a7c1c5604 100644
--- a/drivers/iio/dac/vf610_dac.c
+++ b/drivers/iio/dac/vf610_dac.c
@@ -235,6 +235,7 @@ static int vf610_dac_probe(struct platform_device *pdev)
return 0;

error_iio_device_register:
+ vf610_dac_exit(info);
clk_disable_unprepare(info->clk);

return ret;
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index e6ae8d123984..a3279f303b49 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -1171,8 +1171,8 @@ static int __init init_iommu_from_acpi(struct amd_iommu *iommu,
}
case IVHD_DEV_ACPI_HID: {
u16 devid;
- u8 hid[ACPIHID_HID_LEN] = {0};
- u8 uid[ACPIHID_UID_LEN] = {0};
+ u8 hid[ACPIHID_HID_LEN];
+ u8 uid[ACPIHID_UID_LEN];
int ret;

if (h->type != 0x40) {
@@ -1189,6 +1189,7 @@ static int __init init_iommu_from_acpi(struct amd_iommu *iommu,
break;
}

+ uid[0] = '\0';
switch (e->uidf) {
case UID_NOT_PRESENT:

@@ -1203,8 +1204,8 @@ static int __init init_iommu_from_acpi(struct amd_iommu *iommu,
break;
case UID_IS_CHARACTER:

- memcpy(uid, (u8 *)(&e->uid), ACPIHID_UID_LEN - 1);
- uid[ACPIHID_UID_LEN - 1] = '\0';
+ memcpy(uid, &e->uid, e->uidl);
+ uid[e->uidl] = '\0';

break;
default:
diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
index 451d417eb451..1c8df33404b0 100644
--- a/drivers/misc/mei/client.c
+++ b/drivers/misc/mei/client.c
@@ -276,6 +276,7 @@ void mei_me_cl_rm_by_uuid(struct mei_device *dev, const uuid_le *uuid)
down_write(&dev->me_clients_rwsem);
me_cl = __mei_me_cl_by_uuid(dev, uuid);
__mei_me_cl_del(dev, me_cl);
+ mei_me_cl_put(me_cl);
up_write(&dev->me_clients_rwsem);
}

@@ -297,6 +298,7 @@ void mei_me_cl_rm_by_uuid_id(struct mei_device *dev, const uuid_le *uuid, u8 id)
down_write(&dev->me_clients_rwsem);
me_cl = __mei_me_cl_by_uuid_id(dev, uuid, id);
__mei_me_cl_del(dev, me_cl);
+ mei_me_cl_put(me_cl);
up_write(&dev->me_clients_rwsem);
}

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
index 5478a2ab45c4..54b5f61c8ed9 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -2236,8 +2236,6 @@ static int cxgb_up(struct adapter *adap)
#if IS_ENABLED(CONFIG_IPV6)
update_clip(adap);
#endif
- /* Initialize hash mac addr list*/
- INIT_LIST_HEAD(&adap->mac_hlist);
return err;

irq_err:
@@ -2259,6 +2257,7 @@ static void cxgb_down(struct adapter *adapter)

t4_sge_stop(adapter);
t4_free_sge_resources(adapter);
+
adapter->flags &= ~FULL_INIT_DONE;
}

@@ -4789,6 +4788,9 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
(is_t5(adapter->params.chip) ? STATMODE_V(0) :
T6_STATMODE_V(0)));

+ /* Initialize hash mac addr list */
+ INIT_LIST_HEAD(&adapter->mac_hlist);
+
for_each_port(adapter, i) {
netdev = alloc_etherdev_mq(sizeof(struct port_info),
MAX_ETH_QSETS);
@@ -5067,6 +5069,7 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
static void remove_one(struct pci_dev *pdev)
{
struct adapter *adapter = pci_get_drvdata(pdev);
+ struct hash_mac_addr *entry, *tmp;

if (!adapter) {
pci_release_regions(pdev);
@@ -5105,6 +5108,12 @@ static void remove_one(struct pci_dev *pdev)
if (adapter->num_uld || adapter->num_ofld_uld)
t4_uld_mem_free(adapter);
free_some_resources(adapter);
+ list_for_each_entry_safe(entry, tmp, &adapter->mac_hlist,
+ list) {
+ list_del(&entry->list);
+ kfree(entry);
+ }
+
#if IS_ENABLED(CONFIG_IPV6)
t4_cleanup_clip_tbl(adapter);
#endif
diff --git a/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c b/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
index 9eb3071b69a4..17db5be9d2b7 100644
--- a/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
@@ -719,9 +719,6 @@ static int adapter_up(struct adapter *adapter)
if (adapter->flags & USING_MSIX)
name_msix_vecs(adapter);

- /* Initialize hash mac addr list*/
- INIT_LIST_HEAD(&adapter->mac_hlist);
-
adapter->flags |= FULL_INIT_DONE;
}

@@ -2902,6 +2899,9 @@ static int cxgb4vf_pci_probe(struct pci_dev *pdev,
if (err)
goto err_unmap_bar;

+ /* Initialize hash mac addr list */
+ INIT_LIST_HEAD(&adapter->mac_hlist);
+
/*
* Allocate our "adapter ports" and stitch everything together.
*/
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 7e35bd665630..90eab0521be1 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -3395,7 +3395,7 @@ void igb_configure_tx_ring(struct igb_adapter *adapter,
tdba & 0x00000000ffffffffULL);
wr32(E1000_TDBAH(reg_idx), tdba >> 32);

- ring->tail = hw->hw_addr + E1000_TDT(reg_idx);
+ ring->tail = adapter->io_addr + E1000_TDT(reg_idx);
wr32(E1000_TDH(reg_idx), 0);
writel(0, ring->tail);

@@ -3734,7 +3734,7 @@ void igb_configure_rx_ring(struct igb_adapter *adapter,
ring->count * sizeof(union e1000_adv_rx_desc));

/* initialize head and tail */
- ring->tail = hw->hw_addr + E1000_RDT(reg_idx);
+ ring->tail = adapter->io_addr + E1000_RDT(reg_idx);
wr32(E1000_RDH(reg_idx), 0);
writel(0, ring->tail);

diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c
index a9e8a7356c41..fe844888e0ed 100644
--- a/drivers/net/gtp.c
+++ b/drivers/net/gtp.c
@@ -1108,11 +1108,11 @@ static struct genl_family gtp_genl_family = {
};

static int gtp_genl_fill_info(struct sk_buff *skb, u32 snd_portid, u32 snd_seq,
- u32 type, struct pdp_ctx *pctx)
+ int flags, u32 type, struct pdp_ctx *pctx)
{
void *genlh;

- genlh = genlmsg_put(skb, snd_portid, snd_seq, &gtp_genl_family, 0,
+ genlh = genlmsg_put(skb, snd_portid, snd_seq, &gtp_genl_family, flags,
type);
if (genlh == NULL)
goto nlmsg_failure;
@@ -1208,8 +1208,8 @@ static int gtp_genl_get_pdp(struct sk_buff *skb, struct genl_info *info)
goto err_unlock;
}

- err = gtp_genl_fill_info(skb2, NETLINK_CB(skb).portid,
- info->snd_seq, info->nlhdr->nlmsg_type, pctx);
+ err = gtp_genl_fill_info(skb2, NETLINK_CB(skb).portid, info->snd_seq,
+ 0, info->nlhdr->nlmsg_type, pctx);
if (err < 0)
goto err_unlock_free;

@@ -1252,6 +1252,7 @@ static int gtp_genl_dump_pdp(struct sk_buff *skb,
gtp_genl_fill_info(skb,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq,
+ NLM_F_MULTI,
cb->nlh->nlmsg_type, pctx)) {
cb->args[0] = i;
cb->args[1] = j;
diff --git a/drivers/nvdimm/btt.c b/drivers/nvdimm/btt.c
index 0c46ada027cf..e90ecb179622 100644
--- a/drivers/nvdimm/btt.c
+++ b/drivers/nvdimm/btt.c
@@ -447,9 +447,9 @@ static int btt_log_init(struct arena_info *arena)

static int btt_freelist_init(struct arena_info *arena)
{
- int old, new, ret;
+ int new, ret;
u32 i, map_entry;
- struct log_entry log_new, log_old;
+ struct log_entry log_new;

arena->freelist = kcalloc(arena->nfree, sizeof(struct free_entry),
GFP_KERNEL);
@@ -457,10 +457,6 @@ static int btt_freelist_init(struct arena_info *arena)
return -ENOMEM;

for (i = 0; i < arena->nfree; i++) {
- old = btt_log_read(arena, i, &log_old, LOG_OLD_ENT);
- if (old < 0)
- return old;
-
new = btt_log_read(arena, i, &log_new, LOG_NEW_ENT);
if (new < 0)
return new;
diff --git a/drivers/platform/x86/alienware-wmi.c b/drivers/platform/x86/alienware-wmi.c
index bee2115ecf10..ec7482c7e7eb 100644
--- a/drivers/platform/x86/alienware-wmi.c
+++ b/drivers/platform/x86/alienware-wmi.c
@@ -504,23 +504,22 @@ static acpi_status alienware_wmax_command(struct wmax_basic_args *in_args,

input.length = (acpi_size) sizeof(*in_args);
input.pointer = in_args;
- if (out_data != NULL) {
+ if (out_data) {
output.length = ACPI_ALLOCATE_BUFFER;
output.pointer = NULL;
status = wmi_evaluate_method(WMAX_CONTROL_GUID, 1,
command, &input, &output);
- } else
+ if (ACPI_SUCCESS(status)) {
+ obj = (union acpi_object *)output.pointer;
+ if (obj && obj->type == ACPI_TYPE_INTEGER)
+ *out_data = (u32)obj->integer.value;
+ }
+ kfree(output.pointer);
+ } else {
status = wmi_evaluate_method(WMAX_CONTROL_GUID, 1,
command, &input, NULL);
-
- if (ACPI_SUCCESS(status) && out_data != NULL) {
- obj = (union acpi_object *)output.pointer;
- if (obj && obj->type == ACPI_TYPE_INTEGER)
- *out_data = (u32) obj->integer.value;
}
- kfree(output.pointer);
return status;
-
}

/*
diff --git a/drivers/platform/x86/asus-nb-wmi.c b/drivers/platform/x86/asus-nb-wmi.c
index 0fd7e40b86a0..8137aa343706 100644
--- a/drivers/platform/x86/asus-nb-wmi.c
+++ b/drivers/platform/x86/asus-nb-wmi.c
@@ -561,9 +561,33 @@ static struct asus_wmi_driver asus_nb_wmi_driver = {
.detect_quirks = asus_nb_wmi_quirks,
};

+static const struct dmi_system_id asus_nb_wmi_blacklist[] __initconst = {
+ {
+ /*
+ * asus-nb-wm adds no functionality. The T100TA has a detachable
+ * USB kbd, so no hotkeys and it has no WMI rfkill; and loading
+ * asus-nb-wm causes the camera LED to turn and _stay_ on.
+ */
+ .matches = {
+ DMI_EXACT_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+ DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100TA"),
+ },
+ },
+ {
+ /* The Asus T200TA has the same issue as the T100TA */
+ .matches = {
+ DMI_EXACT_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+ DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T200TA"),
+ },
+ },
+ {} /* Terminating entry */
+};

static int __init asus_nb_wmi_init(void)
{
+ if (dmi_check_system(asus_nb_wmi_blacklist))
+ return -ENODEV;
+
return asus_wmi_register_driver(&asus_nb_wmi_driver);
}

diff --git a/drivers/rapidio/devices/rio_mport_cdev.c b/drivers/rapidio/devices/rio_mport_cdev.c
index 28c45db45aba..ebe8e8dc4677 100644
--- a/drivers/rapidio/devices/rio_mport_cdev.c
+++ b/drivers/rapidio/devices/rio_mport_cdev.c
@@ -905,6 +905,11 @@ rio_dma_transfer(struct file *filp, u32 transfer_mode,
rmcd_error("pinned %ld out of %ld pages",
pinned, nr_pages);
ret = -EFAULT;
+ /*
+ * Set nr_pages up to mean "how many pages to unpin, in
+ * the error handler:
+ */
+ nr_pages = pinned;
goto err_pg;
}

diff --git a/drivers/staging/greybus/uart.c b/drivers/staging/greybus/uart.c
index 2633d2bfb1b4..9ef9cbfd8926 100644
--- a/drivers/staging/greybus/uart.c
+++ b/drivers/staging/greybus/uart.c
@@ -539,9 +539,9 @@ static void gb_tty_set_termios(struct tty_struct *tty,
}

if (C_CRTSCTS(tty) && C_BAUD(tty) != B0)
- newline.flow_control |= GB_SERIAL_AUTO_RTSCTS_EN;
+ newline.flow_control = GB_SERIAL_AUTO_RTSCTS_EN;
else
- newline.flow_control &= ~GB_SERIAL_AUTO_RTSCTS_EN;
+ newline.flow_control = 0;

if (memcmp(&gb_tty->line_coding, &newline, sizeof(newline))) {
memcpy(&gb_tty->line_coding, &newline, sizeof(newline));
diff --git a/drivers/staging/iio/accel/sca3000_ring.c b/drivers/staging/iio/accel/sca3000_ring.c
index d1cb9b9cf22b..391cbcc4ed77 100644
--- a/drivers/staging/iio/accel/sca3000_ring.c
+++ b/drivers/staging/iio/accel/sca3000_ring.c
@@ -56,7 +56,7 @@ static int sca3000_read_data(struct sca3000_state *st,
st->tx[0] = SCA3000_READ_REG(reg_address_high);
ret = spi_sync_transfer(st->us, xfer, ARRAY_SIZE(xfer));
if (ret) {
- dev_err(get_device(&st->us->dev), "problem reading register");
+ dev_err(&st->us->dev, "problem reading register");
goto error_free_rx;
}

diff --git a/drivers/staging/iio/resolver/ad2s1210.c b/drivers/staging/iio/resolver/ad2s1210.c
index 598f0faa48c8..0f5eb2bf5f73 100644
--- a/drivers/staging/iio/resolver/ad2s1210.c
+++ b/drivers/staging/iio/resolver/ad2s1210.c
@@ -126,17 +126,24 @@ static int ad2s1210_config_write(struct ad2s1210_state *st, u8 data)
static int ad2s1210_config_read(struct ad2s1210_state *st,
unsigned char address)
{
- struct spi_transfer xfer = {
- .len = 2,
- .rx_buf = st->rx,
- .tx_buf = st->tx,
+ struct spi_transfer xfers[] = {
+ {
+ .len = 1,
+ .rx_buf = &st->rx[0],
+ .tx_buf = &st->tx[0],
+ .cs_change = 1,
+ }, {
+ .len = 1,
+ .rx_buf = &st->rx[1],
+ .tx_buf = &st->tx[1],
+ },
};
int ret = 0;

ad2s1210_set_mode(MOD_CONFIG, st);
st->tx[0] = address | AD2S1210_MSB_IS_HIGH;
st->tx[1] = AD2S1210_REG_FAULT;
- ret = spi_sync_transfer(st->sdev, &xfer, 1);
+ ret = spi_sync_transfer(st->sdev, xfers, 2);
if (ret < 0)
return ret;
st->old_data = true;
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index 2e541a029657..e33d23c2f6ea 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -1081,11 +1081,11 @@ void usb_disable_endpoint(struct usb_device *dev, unsigned int epaddr,

if (usb_endpoint_out(epaddr)) {
ep = dev->ep_out[epnum];
- if (reset_hardware)
+ if (reset_hardware && epnum != 0)
dev->ep_out[epnum] = NULL;
} else {
ep = dev->ep_in[epnum];
- if (reset_hardware)
+ if (reset_hardware && epnum != 0)
dev->ep_in[epnum] = NULL;
}
if (ep) {
diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c
index 9e17d933ea94..3167f276c4c2 100644
--- a/drivers/watchdog/watchdog_dev.c
+++ b/drivers/watchdog/watchdog_dev.c
@@ -38,7 +38,6 @@
#include <linux/init.h> /* For __init/__exit/... */
#include <linux/jiffies.h> /* For timeout functions */
#include <linux/kernel.h> /* For printk/panic/... */
-#include <linux/kref.h> /* For data references */
#include <linux/miscdevice.h> /* For handling misc devices */
#include <linux/module.h> /* For module stuff/... */
#include <linux/mutex.h> /* For mutexes */
@@ -53,14 +52,14 @@

/*
* struct watchdog_core_data - watchdog core internal data
- * @kref: Reference count.
+ * @dev: The watchdog's internal device
* @cdev: The watchdog's Character device.
* @wdd: Pointer to watchdog device.
* @lock: Lock for watchdog core.
* @status: Watchdog core internal status bits.
*/
struct watchdog_core_data {
- struct kref kref;
+ struct device dev;
struct cdev cdev;
struct watchdog_device *wdd;
struct mutex lock;
@@ -794,7 +793,7 @@ static int watchdog_open(struct inode *inode, struct file *file)
file->private_data = wd_data;

if (!hw_running)
- kref_get(&wd_data->kref);
+ get_device(&wd_data->dev);

/* dev/watchdog is a virtual (and thus non-seekable) filesystem */
return nonseekable_open(inode, file);
@@ -806,11 +805,11 @@ static int watchdog_open(struct inode *inode, struct file *file)
return err;
}

-static void watchdog_core_data_release(struct kref *kref)
+static void watchdog_core_data_release(struct device *dev)
{
struct watchdog_core_data *wd_data;

- wd_data = container_of(kref, struct watchdog_core_data, kref);
+ wd_data = container_of(dev, struct watchdog_core_data, dev);

kfree(wd_data);
}
@@ -870,7 +869,7 @@ static int watchdog_release(struct inode *inode, struct file *file)
*/
if (!running) {
module_put(wd_data->cdev.owner);
- kref_put(&wd_data->kref, watchdog_core_data_release);
+ put_device(&wd_data->dev);
}
return 0;
}
@@ -889,17 +888,22 @@ static struct miscdevice watchdog_miscdev = {
.fops = &watchdog_fops,
};

+static struct class watchdog_class = {
+ .name = "watchdog",
+ .owner = THIS_MODULE,
+ .dev_groups = wdt_groups,
+};
+
/*
* watchdog_cdev_register: register watchdog character device
* @wdd: watchdog device
- * @devno: character device number
*
* Register a watchdog character device including handling the legacy
* /dev/watchdog node. /dev/watchdog is actually a miscdevice and
* thus we set it up like that.
*/

-static int watchdog_cdev_register(struct watchdog_device *wdd, dev_t devno)
+static int watchdog_cdev_register(struct watchdog_device *wdd)
{
struct watchdog_core_data *wd_data;
int err;
@@ -907,7 +911,6 @@ static int watchdog_cdev_register(struct watchdog_device *wdd, dev_t devno)
wd_data = kzalloc(sizeof(struct watchdog_core_data), GFP_KERNEL);
if (!wd_data)
return -ENOMEM;
- kref_init(&wd_data->kref);
mutex_init(&wd_data->lock);

wd_data->wdd = wdd;
@@ -934,23 +937,33 @@ static int watchdog_cdev_register(struct watchdog_device *wdd, dev_t devno)
}
}

+ device_initialize(&wd_data->dev);
+ wd_data->dev.devt = MKDEV(MAJOR(watchdog_devt), wdd->id);
+ wd_data->dev.class = &watchdog_class;
+ wd_data->dev.parent = wdd->parent;
+ wd_data->dev.groups = wdd->groups;
+ wd_data->dev.release = watchdog_core_data_release;
+ dev_set_drvdata(&wd_data->dev, wdd);
+ dev_set_name(&wd_data->dev, "watchdog%d", wdd->id);
+
/* Fill in the data structures */
cdev_init(&wd_data->cdev, &watchdog_fops);
- wd_data->cdev.owner = wdd->ops->owner;

/* Add the device */
- err = cdev_add(&wd_data->cdev, devno, 1);
+ err = cdev_device_add(&wd_data->cdev, &wd_data->dev);
if (err) {
pr_err("watchdog%d unable to add device %d:%d\n",
wdd->id, MAJOR(watchdog_devt), wdd->id);
if (wdd->id == 0) {
misc_deregister(&watchdog_miscdev);
old_wd_data = NULL;
- kref_put(&wd_data->kref, watchdog_core_data_release);
+ put_device(&wd_data->dev);
}
return err;
}

+ wd_data->cdev.owner = wdd->ops->owner;
+
/* Record time of most recent heartbeat as 'just before now'. */
wd_data->last_hw_keepalive = jiffies - 1;

@@ -960,7 +973,7 @@ static int watchdog_cdev_register(struct watchdog_device *wdd, dev_t devno)
*/
if (watchdog_hw_running(wdd)) {
__module_get(wdd->ops->owner);
- kref_get(&wd_data->kref);
+ get_device(&wd_data->dev);
queue_delayed_work(watchdog_wq, &wd_data->work, 0);
}

@@ -979,7 +992,7 @@ static void watchdog_cdev_unregister(struct watchdog_device *wdd)
{
struct watchdog_core_data *wd_data = wdd->wd_data;

- cdev_del(&wd_data->cdev);
+ cdev_device_del(&wd_data->cdev, &wd_data->dev);
if (wdd->id == 0) {
misc_deregister(&watchdog_miscdev);
old_wd_data = NULL;
@@ -992,15 +1005,9 @@ static void watchdog_cdev_unregister(struct watchdog_device *wdd)

cancel_delayed_work_sync(&wd_data->work);

- kref_put(&wd_data->kref, watchdog_core_data_release);
+ put_device(&wd_data->dev);
}

-static struct class watchdog_class = {
- .name = "watchdog",
- .owner = THIS_MODULE,
- .dev_groups = wdt_groups,
-};
-
/*
* watchdog_dev_register: register a watchdog device
* @wdd: watchdog device
@@ -1012,27 +1019,14 @@ static struct class watchdog_class = {

int watchdog_dev_register(struct watchdog_device *wdd)
{
- struct device *dev;
- dev_t devno;
int ret;

- devno = MKDEV(MAJOR(watchdog_devt), wdd->id);
-
- ret = watchdog_cdev_register(wdd, devno);
+ ret = watchdog_cdev_register(wdd);
if (ret)
return ret;

- dev = device_create_with_groups(&watchdog_class, wdd->parent,
- devno, wdd, wdd->groups,
- "watchdog%d", wdd->id);
- if (IS_ERR(dev)) {
- watchdog_cdev_unregister(wdd);
- return PTR_ERR(dev);
- }
-
ret = watchdog_register_pretimeout(wdd);
if (ret) {
- device_destroy(&watchdog_class, devno);
watchdog_cdev_unregister(wdd);
}

@@ -1050,7 +1044,6 @@ int watchdog_dev_register(struct watchdog_device *wdd)
void watchdog_dev_unregister(struct watchdog_device *wdd)
{
watchdog_unregister_pretimeout(wdd);
- device_destroy(&watchdog_class, wdd->wd_data->cdev.dev);
watchdog_cdev_unregister(wdd);
}

diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 617e9ae67f50..e11aacb35d6b 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -3394,6 +3394,7 @@ static void handle_cap_export(struct inode *inode, struct ceph_mds_caps *ex,
WARN_ON(1);
tsession = NULL;
target = -1;
+ mutex_lock(&session->s_mutex);
}
goto retry;

diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index c2ef617d2f97..c875f246cb0e 100644
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -1537,6 +1537,7 @@ static int configfs_rmdir(struct inode *dir, struct dentry *dentry)
spin_lock(&configfs_dirent_lock);
configfs_detach_rollback(dentry);
spin_unlock(&configfs_dirent_lock);
+ config_item_put(parent_item);
return -EINTR;
}
frag->frag_dead = true;
diff --git a/fs/file.c b/fs/file.c
index 09aac4d4729b..82d3f925bab3 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -89,7 +89,7 @@ static void copy_fd_bitmaps(struct fdtable *nfdt, struct fdtable *ofdt,
*/
static void copy_fdtable(struct fdtable *nfdt, struct fdtable *ofdt)
{
- unsigned int cpy, set;
+ size_t cpy, set;

BUG_ON(nfdt->max_fds < ofdt->max_fds);

diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index adc1a97cfe96..efd44d5645d8 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -548,9 +548,6 @@ __acquires(&gl->gl_lockref.lock)
goto out_unlock;
if (nonblock)
goto out_sched;
- smp_mb();
- if (atomic_read(&gl->gl_revokes) != 0)
- goto out_sched;
set_bit(GLF_DEMOTE_IN_PROGRESS, &gl->gl_flags);
GLOCK_BUG_ON(gl, gl->gl_demote_state == LM_ST_EXCLUSIVE);
gl->gl_target = gl->gl_demote_state;
diff --git a/include/linux/net.h b/include/linux/net.h
index cd0c8bd0a1de..54270c4707cf 100644
--- a/include/linux/net.h
+++ b/include/linux/net.h
@@ -298,6 +298,9 @@ int kernel_sendpage(struct socket *sock, struct page *page, int offset,
int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg);
int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how);

+/* Routine returns the IP overhead imposed by a (caller-protected) socket. */
+u32 kernel_sock_ip_overhead(struct sock *sk);
+
#define MODULE_ALIAS_NETPROTO(proto) \
MODULE_ALIAS("net-pf-" __stringify(proto))

diff --git a/include/linux/padata.h b/include/linux/padata.h
index 0f9e567d5e15..3afa17ed59da 100644
--- a/include/linux/padata.h
+++ b/include/linux/padata.h
@@ -24,7 +24,6 @@
#include <linux/workqueue.h>
#include <linux/spinlock.h>
#include <linux/list.h>
-#include <linux/timer.h>
#include <linux/notifier.h>
#include <linux/kobject.h>

@@ -37,6 +36,7 @@
* @list: List entry, to attach to the padata lists.
* @pd: Pointer to the internal control structure.
* @cb_cpu: Callback cpu for serializatioon.
+ * @cpu: Cpu for parallelization.
* @seq_nr: Sequence number of the parallelized data object.
* @info: Used to pass information from the parallel to the serial function.
* @parallel: Parallel execution function.
@@ -46,6 +46,7 @@ struct padata_priv {
struct list_head list;
struct parallel_data *pd;
int cb_cpu;
+ int cpu;
int info;
void (*parallel)(struct padata_priv *padata);
void (*serial)(struct padata_priv *padata);
@@ -83,7 +84,6 @@ struct padata_serial_queue {
* @serial: List to wait for serialization after reordering.
* @pwork: work struct for parallelization.
* @swork: work struct for serialization.
- * @pd: Backpointer to the internal control structure.
* @work: work struct for parallelization.
* @num_obj: Number of objects that are processed by this cpu.
* @cpu_index: Index of the cpu.
@@ -91,7 +91,6 @@ struct padata_serial_queue {
struct padata_parallel_queue {
struct padata_list parallel;
struct padata_list reorder;
- struct parallel_data *pd;
struct work_struct work;
atomic_t num_obj;
int cpu_index;
@@ -118,10 +117,10 @@ struct padata_cpumask {
* @reorder_objects: Number of objects waiting in the reorder queues.
* @refcnt: Number of objects holding a reference on this parallel_data.
* @max_seq_nr: Maximal used sequence number.
+ * @cpu: Next CPU to be processed.
* @cpumask: The cpumasks in use for parallel and serial workers.
+ * @reorder_work: work struct for reordering.
* @lock: Reorder lock.
- * @processed: Number of already processed objects.
- * @timer: Reorder timer.
*/
struct parallel_data {
struct padata_instance *pinst;
@@ -130,10 +129,10 @@ struct parallel_data {
atomic_t reorder_objects;
atomic_t refcnt;
atomic_t seq_nr;
+ int cpu;
struct padata_cpumask cpumask;
+ struct work_struct reorder_work;
spinlock_t lock ____cacheline_aligned;
- unsigned int processed;
- struct timer_list timer;
};

/**
diff --git a/include/uapi/linux/if_pppol2tp.h b/include/uapi/linux/if_pppol2tp.h
index 4bd1f55d6377..6418c4d10241 100644
--- a/include/uapi/linux/if_pppol2tp.h
+++ b/include/uapi/linux/if_pppol2tp.h
@@ -18,6 +18,7 @@
#include <linux/types.h>
#include <linux/in.h>
#include <linux/in6.h>
+#include <linux/l2tp.h>

/* Structure used to connect() the socket to a particular tunnel UDP
* socket over IPv4.
@@ -90,14 +91,12 @@ enum {
PPPOL2TP_SO_REORDERTO = 5,
};

-/* Debug message categories for the DEBUG socket option */
+/* Debug message categories for the DEBUG socket option (deprecated) */
enum {
- PPPOL2TP_MSG_DEBUG = (1 << 0), /* verbose debug (if
- * compiled in) */
- PPPOL2TP_MSG_CONTROL = (1 << 1), /* userspace - kernel
- * interface */
- PPPOL2TP_MSG_SEQ = (1 << 2), /* sequence numbers */
- PPPOL2TP_MSG_DATA = (1 << 3), /* data packets */
+ PPPOL2TP_MSG_DEBUG = L2TP_MSG_DEBUG,
+ PPPOL2TP_MSG_CONTROL = L2TP_MSG_CONTROL,
+ PPPOL2TP_MSG_SEQ = L2TP_MSG_SEQ,
+ PPPOL2TP_MSG_DATA = L2TP_MSG_DATA,
};


diff --git a/include/uapi/linux/l2tp.h b/include/uapi/linux/l2tp.h
index 4bd27d0270a2..bb2d62037037 100644
--- a/include/uapi/linux/l2tp.h
+++ b/include/uapi/linux/l2tp.h
@@ -108,7 +108,7 @@ enum {
L2TP_ATTR_VLAN_ID, /* u16 */
L2TP_ATTR_COOKIE, /* 0, 4 or 8 bytes */
L2TP_ATTR_PEER_COOKIE, /* 0, 4 or 8 bytes */
- L2TP_ATTR_DEBUG, /* u32 */
+ L2TP_ATTR_DEBUG, /* u32, enum l2tp_debug_flags */
L2TP_ATTR_RECV_SEQ, /* u8 */
L2TP_ATTR_SEND_SEQ, /* u8 */
L2TP_ATTR_LNS_MODE, /* u8 */
@@ -175,6 +175,21 @@ enum l2tp_seqmode {
L2TP_SEQ_ALL = 2,
};

+/**
+ * enum l2tp_debug_flags - debug message categories for L2TP tunnels/sessions
+ *
+ * @L2TP_MSG_DEBUG: verbose debug (if compiled in)
+ * @L2TP_MSG_CONTROL: userspace - kernel interface
+ * @L2TP_MSG_SEQ: sequence numbers
+ * @L2TP_MSG_DATA: data packets
+ */
+enum l2tp_debug_flags {
+ L2TP_MSG_DEBUG = (1 << 0),
+ L2TP_MSG_CONTROL = (1 << 1),
+ L2TP_MSG_SEQ = (1 << 2),
+ L2TP_MSG_DATA = (1 << 3),
+};
+
/*
* NETLINK_GENERIC related info
*/
diff --git a/kernel/padata.c b/kernel/padata.c
index 6939111b3cbe..e82f066d63ac 100644
--- a/kernel/padata.c
+++ b/kernel/padata.c
@@ -66,15 +66,11 @@ static int padata_cpu_hash(struct parallel_data *pd)
static void padata_parallel_worker(struct work_struct *parallel_work)
{
struct padata_parallel_queue *pqueue;
- struct parallel_data *pd;
- struct padata_instance *pinst;
LIST_HEAD(local_list);

local_bh_disable();
pqueue = container_of(parallel_work,
struct padata_parallel_queue, work);
- pd = pqueue->pd;
- pinst = pd->pinst;

spin_lock(&pqueue->parallel.lock);
list_replace_init(&pqueue->parallel.list, &local_list);
@@ -137,6 +133,7 @@ int padata_do_parallel(struct padata_instance *pinst,
padata->cb_cpu = cb_cpu;

target_cpu = padata_cpu_hash(pd);
+ padata->cpu = target_cpu;
queue = per_cpu_ptr(pd->pqueue, target_cpu);

spin_lock(&queue->parallel.lock);
@@ -160,8 +157,6 @@ EXPORT_SYMBOL(padata_do_parallel);
* A pointer to the control struct of the next object that needs
* serialization, if present in one of the percpu reorder queues.
*
- * NULL, if all percpu reorder queues are empty.
- *
* -EINPROGRESS, if the next object that needs serialization will
* be parallel processed by another cpu and is not yet present in
* the cpu's reorder queue.
@@ -171,25 +166,12 @@ EXPORT_SYMBOL(padata_do_parallel);
*/
static struct padata_priv *padata_get_next(struct parallel_data *pd)
{
- int cpu, num_cpus;
- unsigned int next_nr, next_index;
struct padata_parallel_queue *next_queue;
struct padata_priv *padata;
struct padata_list *reorder;
+ int cpu = pd->cpu;

- num_cpus = cpumask_weight(pd->cpumask.pcpu);
-
- /*
- * Calculate the percpu reorder queue and the sequence
- * number of the next object.
- */
- next_nr = pd->processed;
- next_index = next_nr % num_cpus;
- cpu = padata_index_to_cpu(pd, next_index);
next_queue = per_cpu_ptr(pd->pqueue, cpu);
-
- padata = NULL;
-
reorder = &next_queue->reorder;

spin_lock(&reorder->lock);
@@ -200,7 +182,8 @@ static struct padata_priv *padata_get_next(struct parallel_data *pd)
list_del_init(&padata->list);
atomic_dec(&pd->reorder_objects);

- pd->processed++;
+ pd->cpu = cpumask_next_wrap(cpu, pd->cpumask.pcpu, -1,
+ false);

spin_unlock(&reorder->lock);
goto out;
@@ -223,6 +206,7 @@ static void padata_reorder(struct parallel_data *pd)
struct padata_priv *padata;
struct padata_serial_queue *squeue;
struct padata_instance *pinst = pd->pinst;
+ struct padata_parallel_queue *next_queue;

/*
* We need to ensure that only one cpu can work on dequeueing of
@@ -241,12 +225,11 @@ static void padata_reorder(struct parallel_data *pd)
padata = padata_get_next(pd);

/*
- * All reorder queues are empty, or the next object that needs
- * serialization is parallel processed by another cpu and is
- * still on it's way to the cpu's reorder queue, nothing to
- * do for now.
+ * If the next object that needs serialization is parallel
+ * processed by another cpu and is still on it's way to the
+ * cpu's reorder queue, nothing to do for now.
*/
- if (!padata || PTR_ERR(padata) == -EINPROGRESS)
+ if (PTR_ERR(padata) == -EINPROGRESS)
break;

/*
@@ -255,7 +238,6 @@ static void padata_reorder(struct parallel_data *pd)
* so exit immediately.
*/
if (PTR_ERR(padata) == -ENODATA) {
- del_timer(&pd->timer);
spin_unlock_bh(&pd->lock);
return;
}
@@ -274,28 +256,27 @@ static void padata_reorder(struct parallel_data *pd)

/*
* The next object that needs serialization might have arrived to
- * the reorder queues in the meantime, we will be called again
- * from the timer function if no one else cares for it.
+ * the reorder queues in the meantime.
*
- * Ensure reorder_objects is read after pd->lock is dropped so we see
- * an increment from another task in padata_do_serial. Pairs with
+ * Ensure reorder queue is read after pd->lock is dropped so we see
+ * new objects from another task in padata_do_serial. Pairs with
* smp_mb__after_atomic in padata_do_serial.
*/
smp_mb();
- if (atomic_read(&pd->reorder_objects)
- && !(pinst->flags & PADATA_RESET))
- mod_timer(&pd->timer, jiffies + HZ);
- else
- del_timer(&pd->timer);

- return;
+ next_queue = per_cpu_ptr(pd->pqueue, pd->cpu);
+ if (!list_empty(&next_queue->reorder.list))
+ queue_work(pinst->wq, &pd->reorder_work);
}

-static void padata_reorder_timer(unsigned long arg)
+static void invoke_padata_reorder(struct work_struct *work)
{
- struct parallel_data *pd = (struct parallel_data *)arg;
+ struct parallel_data *pd;

+ local_bh_disable();
+ pd = container_of(work, struct parallel_data, reorder_work);
padata_reorder(pd);
+ local_bh_enable();
}

static void padata_serial_worker(struct work_struct *serial_work)
@@ -342,29 +323,22 @@ static void padata_serial_worker(struct work_struct *serial_work)
*/
void padata_do_serial(struct padata_priv *padata)
{
- int cpu;
- struct padata_parallel_queue *pqueue;
- struct parallel_data *pd;
-
- pd = padata->pd;
-
- cpu = get_cpu();
- pqueue = per_cpu_ptr(pd->pqueue, cpu);
+ struct parallel_data *pd = padata->pd;
+ struct padata_parallel_queue *pqueue = per_cpu_ptr(pd->pqueue,
+ padata->cpu);

spin_lock(&pqueue->reorder.lock);
- atomic_inc(&pd->reorder_objects);
list_add_tail(&padata->list, &pqueue->reorder.list);
+ atomic_inc(&pd->reorder_objects);
spin_unlock(&pqueue->reorder.lock);

/*
- * Ensure the atomic_inc of reorder_objects above is ordered correctly
+ * Ensure the addition to the reorder list is ordered correctly
* with the trylock of pd->lock in padata_reorder. Pairs with smp_mb
* in padata_reorder.
*/
smp_mb__after_atomic();

- put_cpu();
-
padata_reorder(pd);
}
EXPORT_SYMBOL(padata_do_serial);
@@ -413,9 +387,14 @@ static void padata_init_pqueues(struct parallel_data *pd)
struct padata_parallel_queue *pqueue;

cpu_index = 0;
- for_each_cpu(cpu, pd->cpumask.pcpu) {
+ for_each_possible_cpu(cpu) {
pqueue = per_cpu_ptr(pd->pqueue, cpu);
- pqueue->pd = pd;
+
+ if (!cpumask_test_cpu(cpu, pd->cpumask.pcpu)) {
+ pqueue->cpu_index = -1;
+ continue;
+ }
+
pqueue->cpu_index = cpu_index;
cpu_index++;

@@ -449,12 +428,13 @@ static struct parallel_data *padata_alloc_pd(struct padata_instance *pinst,

padata_init_pqueues(pd);
padata_init_squeues(pd);
- setup_timer(&pd->timer, padata_reorder_timer, (unsigned long)pd);
atomic_set(&pd->seq_nr, -1);
atomic_set(&pd->reorder_objects, 0);
atomic_set(&pd->refcnt, 1);
pd->pinst = pinst;
spin_lock_init(&pd->lock);
+ pd->cpu = cpumask_first(pd->cpumask.pcpu);
+ INIT_WORK(&pd->reorder_work, invoke_padata_reorder);

return pd;

diff --git a/lib/Makefile b/lib/Makefile
index 452d2956a5a2..7a55c5205281 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -230,5 +230,7 @@ obj-$(CONFIG_UCS2_STRING) += ucs2_string.o
obj-$(CONFIG_UBSAN) += ubsan.o

UBSAN_SANITIZE_ubsan.o := n
+KASAN_SANITIZE_ubsan.o := n
+CFLAGS_ubsan.o := $(call cc-option, -fno-stack-protector) $(DISABLE_STACKLEAK_PLUGIN)

obj-$(CONFIG_SBITMAP) += sbitmap.o
diff --git a/net/l2tp/l2tp_core.c b/net/l2tp/l2tp_core.c
index 7c3da29fad8e..36c7f616294a 100644
--- a/net/l2tp/l2tp_core.c
+++ b/net/l2tp/l2tp_core.c
@@ -112,53 +112,19 @@ struct l2tp_net {
spinlock_t l2tp_session_hlist_lock;
};

-static void l2tp_tunnel_free(struct l2tp_tunnel *tunnel);

static inline struct l2tp_tunnel *l2tp_tunnel(struct sock *sk)
{
return sk->sk_user_data;
}

-static inline struct l2tp_net *l2tp_pernet(struct net *net)
+static inline struct l2tp_net *l2tp_pernet(const struct net *net)
{
BUG_ON(!net);

return net_generic(net, l2tp_net_id);
}

-/* Tunnel reference counts. Incremented per session that is added to
- * the tunnel.
- */
-static inline void l2tp_tunnel_inc_refcount_1(struct l2tp_tunnel *tunnel)
-{
- atomic_inc(&tunnel->ref_count);
-}
-
-static inline void l2tp_tunnel_dec_refcount_1(struct l2tp_tunnel *tunnel)
-{
- if (atomic_dec_and_test(&tunnel->ref_count))
- l2tp_tunnel_free(tunnel);
-}
-#ifdef L2TP_REFCNT_DEBUG
-#define l2tp_tunnel_inc_refcount(_t) \
-do { \
- pr_debug("l2tp_tunnel_inc_refcount: %s:%d %s: cnt=%d\n", \
- __func__, __LINE__, (_t)->name, \
- atomic_read(&_t->ref_count)); \
- l2tp_tunnel_inc_refcount_1(_t); \
-} while (0)
-#define l2tp_tunnel_dec_refcount(_t) \
-do { \
- pr_debug("l2tp_tunnel_dec_refcount: %s:%d %s: cnt=%d\n", \
- __func__, __LINE__, (_t)->name, \
- atomic_read(&_t->ref_count)); \
- l2tp_tunnel_dec_refcount_1(_t); \
-} while (0)
-#else
-#define l2tp_tunnel_inc_refcount(t) l2tp_tunnel_inc_refcount_1(t)
-#define l2tp_tunnel_dec_refcount(t) l2tp_tunnel_dec_refcount_1(t)
-#endif
-
/* Session hash global list for L2TPv3.
* The session_id SHOULD be random according to RFC3931, but several
* L2TP implementations use incrementing session_ids. So we do a real
@@ -216,27 +182,6 @@ static void l2tp_tunnel_sock_put(struct sock *sk)
sock_put(sk);
}

-/* Lookup a session by id in the global session list
- */
-static struct l2tp_session *l2tp_session_find_2(struct net *net, u32 session_id)
-{
- struct l2tp_net *pn = l2tp_pernet(net);
- struct hlist_head *session_list =
- l2tp_session_id_hash_2(pn, session_id);
- struct l2tp_session *session;
-
- rcu_read_lock_bh();
- hlist_for_each_entry_rcu(session, session_list, global_hlist) {
- if (session->session_id == session_id) {
- rcu_read_unlock_bh();
- return session;
- }
- }
- rcu_read_unlock_bh();
-
- return NULL;
-}
-
/* Session hash list.
* The session_id SHOULD be random according to RFC2661, but several
* L2TP implementations (Cisco and Microsoft) use incrementing
@@ -249,38 +194,31 @@ l2tp_session_id_hash(struct l2tp_tunnel *tunnel, u32 session_id)
return &tunnel->session_hlist[hash_32(session_id, L2TP_HASH_BITS)];
}

-/* Lookup a session by id
- */
-struct l2tp_session *l2tp_session_find(struct net *net, struct l2tp_tunnel *tunnel, u32 session_id)
+/* Lookup a tunnel. A new reference is held on the returned tunnel. */
+struct l2tp_tunnel *l2tp_tunnel_get(const struct net *net, u32 tunnel_id)
{
- struct hlist_head *session_list;
- struct l2tp_session *session;
+ const struct l2tp_net *pn = l2tp_pernet(net);
+ struct l2tp_tunnel *tunnel;

- /* In L2TPv3, session_ids are unique over all tunnels and we
- * sometimes need to look them up before we know the
- * tunnel.
- */
- if (tunnel == NULL)
- return l2tp_session_find_2(net, session_id);
+ rcu_read_lock_bh();
+ list_for_each_entry_rcu(tunnel, &pn->l2tp_tunnel_list, list) {
+ if (tunnel->tunnel_id == tunnel_id) {
+ l2tp_tunnel_inc_refcount(tunnel);
+ rcu_read_unlock_bh();

- session_list = l2tp_session_id_hash(tunnel, session_id);
- read_lock_bh(&tunnel->hlist_lock);
- hlist_for_each_entry(session, session_list, hlist) {
- if (session->session_id == session_id) {
- read_unlock_bh(&tunnel->hlist_lock);
- return session;
+ return tunnel;
}
}
- read_unlock_bh(&tunnel->hlist_lock);
+ rcu_read_unlock_bh();

return NULL;
}
-EXPORT_SYMBOL_GPL(l2tp_session_find);
+EXPORT_SYMBOL_GPL(l2tp_tunnel_get);

-/* Like l2tp_session_find() but takes a reference on the returned session.
+/* Lookup a session. A new reference is held on the returned session.
* Optionally calls session->ref() too if do_ref is true.
*/
-struct l2tp_session *l2tp_session_get(struct net *net,
+struct l2tp_session *l2tp_session_get(const struct net *net,
struct l2tp_tunnel *tunnel,
u32 session_id, bool do_ref)
{
@@ -355,7 +293,8 @@ EXPORT_SYMBOL_GPL(l2tp_session_get_nth);
/* Lookup a session by interface name.
* This is very inefficient but is only used by management interfaces.
*/
-struct l2tp_session *l2tp_session_get_by_ifname(struct net *net, char *ifname,
+struct l2tp_session *l2tp_session_get_by_ifname(const struct net *net,
+ const char *ifname,
bool do_ref)
{
struct l2tp_net *pn = l2tp_pernet(net);
@@ -382,20 +321,28 @@ struct l2tp_session *l2tp_session_get_by_ifname(struct net *net, char *ifname,
}
EXPORT_SYMBOL_GPL(l2tp_session_get_by_ifname);

-static int l2tp_session_add_to_tunnel(struct l2tp_tunnel *tunnel,
- struct l2tp_session *session)
+int l2tp_session_register(struct l2tp_session *session,
+ struct l2tp_tunnel *tunnel)
{
struct l2tp_session *session_walk;
struct hlist_head *g_head;
struct hlist_head *head;
struct l2tp_net *pn;
+ int err;

head = l2tp_session_id_hash(tunnel, session->session_id);

write_lock_bh(&tunnel->hlist_lock);
+ if (!tunnel->acpt_newsess) {
+ err = -ENODEV;
+ goto err_tlock;
+ }
+
hlist_for_each_entry(session_walk, head, hlist)
- if (session_walk->session_id == session->session_id)
- goto exist;
+ if (session_walk->session_id == session->session_id) {
+ err = -EEXIST;
+ goto err_tlock;
+ }

if (tunnel->version == L2TP_HDR_VER_3) {
pn = l2tp_pernet(tunnel->l2tp_net);
@@ -403,30 +350,44 @@ static int l2tp_session_add_to_tunnel(struct l2tp_tunnel *tunnel,
session->session_id);

spin_lock_bh(&pn->l2tp_session_hlist_lock);
+
hlist_for_each_entry(session_walk, g_head, global_hlist)
- if (session_walk->session_id == session->session_id)
- goto exist_glob;
+ if (session_walk->session_id == session->session_id) {
+ err = -EEXIST;
+ goto err_tlock_pnlock;
+ }

+ l2tp_tunnel_inc_refcount(tunnel);
+ sock_hold(tunnel->sock);
hlist_add_head_rcu(&session->global_hlist, g_head);
+
spin_unlock_bh(&pn->l2tp_session_hlist_lock);
+ } else {
+ l2tp_tunnel_inc_refcount(tunnel);
+ sock_hold(tunnel->sock);
}

hlist_add_head(&session->hlist, head);
write_unlock_bh(&tunnel->hlist_lock);

+ /* Ignore management session in session count value */
+ if (session->session_id != 0)
+ atomic_inc(&l2tp_session_count);
+
return 0;

-exist_glob:
+err_tlock_pnlock:
spin_unlock_bh(&pn->l2tp_session_hlist_lock);
-exist:
+err_tlock:
write_unlock_bh(&tunnel->hlist_lock);

- return -EEXIST;
+ return err;
}
+EXPORT_SYMBOL_GPL(l2tp_session_register);

/* Lookup a tunnel by id
*/
-struct l2tp_tunnel *l2tp_tunnel_find(struct net *net, u32 tunnel_id)
+struct l2tp_tunnel *l2tp_tunnel_find(const struct net *net, u32 tunnel_id)
{
struct l2tp_tunnel *tunnel;
struct l2tp_net *pn = l2tp_pernet(net);
@@ -444,7 +405,7 @@ struct l2tp_tunnel *l2tp_tunnel_find(struct net *net, u32 tunnel_id)
}
EXPORT_SYMBOL_GPL(l2tp_tunnel_find);

-struct l2tp_tunnel *l2tp_tunnel_find_nth(struct net *net, int nth)
+struct l2tp_tunnel *l2tp_tunnel_find_nth(const struct net *net, int nth)
{
struct l2tp_net *pn = l2tp_pernet(net);
struct l2tp_tunnel *tunnel;
@@ -1307,7 +1268,6 @@ static void l2tp_tunnel_destruct(struct sock *sk)
/* Remove hooks into tunnel socket */
sk->sk_destruct = tunnel->old_sk_destruct;
sk->sk_user_data = NULL;
- tunnel->sock = NULL;

/* Remove the tunnel struct from the tunnel list */
pn = l2tp_pernet(tunnel->l2tp_net);
@@ -1317,6 +1277,8 @@ static void l2tp_tunnel_destruct(struct sock *sk)
atomic_dec(&l2tp_tunnel_count);

l2tp_tunnel_closeall(tunnel);
+
+ tunnel->sock = NULL;
l2tp_tunnel_dec_refcount(tunnel);

/* Call the original destructor */
@@ -1341,6 +1303,7 @@ void l2tp_tunnel_closeall(struct l2tp_tunnel *tunnel)
tunnel->name);

write_lock_bh(&tunnel->hlist_lock);
+ tunnel->acpt_newsess = false;
for (hash = 0; hash < L2TP_HASH_SIZE; hash++) {
again:
hlist_for_each_safe(walk, tmp, &tunnel->session_hlist[hash]) {
@@ -1394,17 +1357,6 @@ static void l2tp_udp_encap_destroy(struct sock *sk)
}
}

-/* Really kill the tunnel.
- * Come here only when all sessions have been cleared from the tunnel.
- */
-static void l2tp_tunnel_free(struct l2tp_tunnel *tunnel)
-{
- BUG_ON(atomic_read(&tunnel->ref_count) != 0);
- BUG_ON(tunnel->sock != NULL);
- l2tp_info(tunnel, L2TP_MSG_CONTROL, "%s: free...\n", tunnel->name);
- kfree_rcu(tunnel, rcu);
-}
-
/* Workqueue tunnel deletion function */
static void l2tp_tunnel_del_work(struct work_struct *work)
{
@@ -1655,6 +1607,7 @@ int l2tp_tunnel_create(struct net *net, int fd, int version, u32 tunnel_id, u32
tunnel->magic = L2TP_TUNNEL_MAGIC;
sprintf(&tunnel->name[0], "tunl %u", tunnel_id);
rwlock_init(&tunnel->hlist_lock);
+ tunnel->acpt_newsess = true;

/* The net we belong to */
tunnel->l2tp_net = net;
@@ -1840,7 +1793,6 @@ EXPORT_SYMBOL_GPL(l2tp_session_set_header_len);
struct l2tp_session *l2tp_session_create(int priv_size, struct l2tp_tunnel *tunnel, u32 session_id, u32 peer_session_id, struct l2tp_session_cfg *cfg)
{
struct l2tp_session *session;
- int err;

session = kzalloc(sizeof(struct l2tp_session) + priv_size, GFP_KERNEL);
if (session != NULL) {
@@ -1895,25 +1847,7 @@ struct l2tp_session *l2tp_session_create(int priv_size, struct l2tp_tunnel *tunn

l2tp_session_set_header_len(session, tunnel->version);

- err = l2tp_session_add_to_tunnel(tunnel, session);
- if (err) {
- kfree(session);
-
- return ERR_PTR(err);
- }
-
- /* Bump the reference count. The session context is deleted
- * only when this drops to zero.
- */
l2tp_session_inc_refcount(session);
- l2tp_tunnel_inc_refcount(tunnel);
-
- /* Ensure tunnel socket isn't deleted */
- sock_hold(tunnel->sock);
-
- /* Ignore management session in session count value */
- if (session->session_id != 0)
- atomic_inc(&l2tp_session_count);

return session;
}
diff --git a/net/l2tp/l2tp_core.h b/net/l2tp/l2tp_core.h
index 7c2037184b6c..2b9b6fb67ae9 100644
--- a/net/l2tp/l2tp_core.h
+++ b/net/l2tp/l2tp_core.h
@@ -23,16 +23,6 @@
#define L2TP_HASH_BITS_2 8
#define L2TP_HASH_SIZE_2 (1 << L2TP_HASH_BITS_2)

-/* Debug message categories for the DEBUG socket option */
-enum {
- L2TP_MSG_DEBUG = (1 << 0), /* verbose debug (if
- * compiled in) */
- L2TP_MSG_CONTROL = (1 << 1), /* userspace - kernel
- * interface */
- L2TP_MSG_SEQ = (1 << 2), /* sequence numbers */
- L2TP_MSG_DATA = (1 << 3), /* data packets */
-};
-
struct sk_buff;

struct l2tp_stats {
@@ -172,6 +162,10 @@ struct l2tp_tunnel {

struct rcu_head rcu;
rwlock_t hlist_lock; /* protect session_hlist */
+ bool acpt_newsess; /* Indicates whether this
+ * tunnel accepts new sessions.
+ * Protected by hlist_lock.
+ */
struct hlist_head session_hlist[L2TP_HASH_SIZE];
/* hashed list of sessions,
* hashed by id */
@@ -207,7 +201,9 @@ struct l2tp_tunnel {
};

struct l2tp_nl_cmd_ops {
- int (*session_create)(struct net *net, u32 tunnel_id, u32 session_id, u32 peer_session_id, struct l2tp_session_cfg *cfg);
+ int (*session_create)(struct net *net, struct l2tp_tunnel *tunnel,
+ u32 session_id, u32 peer_session_id,
+ struct l2tp_session_cfg *cfg);
int (*session_delete)(struct l2tp_session *session);
};

@@ -241,18 +237,18 @@ static inline struct l2tp_tunnel *l2tp_sock_to_tunnel(struct sock *sk)
return tunnel;
}

-struct l2tp_session *l2tp_session_get(struct net *net,
+struct l2tp_tunnel *l2tp_tunnel_get(const struct net *net, u32 tunnel_id);
+
+struct l2tp_session *l2tp_session_get(const struct net *net,
struct l2tp_tunnel *tunnel,
u32 session_id, bool do_ref);
-struct l2tp_session *l2tp_session_find(struct net *net,
- struct l2tp_tunnel *tunnel,
- u32 session_id);
struct l2tp_session *l2tp_session_get_nth(struct l2tp_tunnel *tunnel, int nth,
bool do_ref);
-struct l2tp_session *l2tp_session_get_by_ifname(struct net *net, char *ifname,
+struct l2tp_session *l2tp_session_get_by_ifname(const struct net *net,
+ const char *ifname,
bool do_ref);
-struct l2tp_tunnel *l2tp_tunnel_find(struct net *net, u32 tunnel_id);
-struct l2tp_tunnel *l2tp_tunnel_find_nth(struct net *net, int nth);
+struct l2tp_tunnel *l2tp_tunnel_find(const struct net *net, u32 tunnel_id);
+struct l2tp_tunnel *l2tp_tunnel_find_nth(const struct net *net, int nth);

int l2tp_tunnel_create(struct net *net, int fd, int version, u32 tunnel_id,
u32 peer_tunnel_id, struct l2tp_tunnel_cfg *cfg,
@@ -263,6 +259,9 @@ struct l2tp_session *l2tp_session_create(int priv_size,
struct l2tp_tunnel *tunnel,
u32 session_id, u32 peer_session_id,
struct l2tp_session_cfg *cfg);
+int l2tp_session_register(struct l2tp_session *session,
+ struct l2tp_tunnel *tunnel);
+
void __l2tp_session_unhash(struct l2tp_session *session);
int l2tp_session_delete(struct l2tp_session *session);
void l2tp_session_free(struct l2tp_session *session);
@@ -281,6 +280,17 @@ int l2tp_nl_register_ops(enum l2tp_pwtype pw_type,
void l2tp_nl_unregister_ops(enum l2tp_pwtype pw_type);
int l2tp_ioctl(struct sock *sk, int cmd, unsigned long arg);

+static inline void l2tp_tunnel_inc_refcount(struct l2tp_tunnel *tunnel)
+{
+ atomic_inc(&tunnel->ref_count);
+}
+
+static inline void l2tp_tunnel_dec_refcount(struct l2tp_tunnel *tunnel)
+{
+ if (atomic_dec_and_test(&tunnel->ref_count))
+ kfree_rcu(tunnel, rcu);
+}
+
/* Session reference counts. Incremented when code obtains a reference
* to a session.
*/
diff --git a/net/l2tp/l2tp_eth.c b/net/l2tp/l2tp_eth.c
index eecc64e138de..8b8fc2337960 100644
--- a/net/l2tp/l2tp_eth.c
+++ b/net/l2tp/l2tp_eth.c
@@ -30,6 +30,9 @@
#include <net/xfrm.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/udp.h>

#include "l2tp_core.h"

@@ -41,7 +44,6 @@ struct l2tp_eth {
struct net_device *dev;
struct sock *tunnel_sock;
struct l2tp_session *session;
- struct list_head list;
atomic_long_t tx_bytes;
atomic_long_t tx_packets;
atomic_long_t tx_dropped;
@@ -52,20 +54,9 @@ struct l2tp_eth {

/* via l2tp_session_priv() */
struct l2tp_eth_sess {
- struct net_device *dev;
+ struct net_device __rcu *dev;
};

-/* per-net private data for this module */
-static unsigned int l2tp_eth_net_id;
-struct l2tp_eth_net {
- struct list_head l2tp_eth_dev_list;
- spinlock_t l2tp_eth_lock;
-};
-
-static inline struct l2tp_eth_net *l2tp_eth_pernet(struct net *net)
-{
- return net_generic(net, l2tp_eth_net_id);
-}

static int l2tp_eth_dev_init(struct net_device *dev)
{
@@ -82,12 +73,13 @@ static int l2tp_eth_dev_init(struct net_device *dev)
static void l2tp_eth_dev_uninit(struct net_device *dev)
{
struct l2tp_eth *priv = netdev_priv(dev);
- struct l2tp_eth_net *pn = l2tp_eth_pernet(dev_net(dev));
+ struct l2tp_eth_sess *spriv;

- spin_lock(&pn->l2tp_eth_lock);
- list_del_init(&priv->list);
- spin_unlock(&pn->l2tp_eth_lock);
- dev_put(dev);
+ spriv = l2tp_session_priv(priv->session);
+ RCU_INIT_POINTER(spriv->dev, NULL);
+ /* No need for synchronize_net() here. We're called by
+ * unregister_netdev*(), which does the synchronisation for us.
+ */
}

static int l2tp_eth_dev_xmit(struct sk_buff *skb, struct net_device *dev)
@@ -141,8 +133,8 @@ static void l2tp_eth_dev_setup(struct net_device *dev)
static void l2tp_eth_dev_recv(struct l2tp_session *session, struct sk_buff *skb, int data_len)
{
struct l2tp_eth_sess *spriv = l2tp_session_priv(session);
- struct net_device *dev = spriv->dev;
- struct l2tp_eth *priv = netdev_priv(dev);
+ struct net_device *dev;
+ struct l2tp_eth *priv;

if (session->debug & L2TP_MSG_DATA) {
unsigned int length;
@@ -166,16 +158,25 @@ static void l2tp_eth_dev_recv(struct l2tp_session *session, struct sk_buff *skb,
skb_dst_drop(skb);
nf_reset(skb);

+ rcu_read_lock();
+ dev = rcu_dereference(spriv->dev);
+ if (!dev)
+ goto error_rcu;
+
+ priv = netdev_priv(dev);
if (dev_forward_skb(dev, skb) == NET_RX_SUCCESS) {
atomic_long_inc(&priv->rx_packets);
atomic_long_add(data_len, &priv->rx_bytes);
} else {
atomic_long_inc(&priv->rx_errors);
}
+ rcu_read_unlock();
+
return;

+error_rcu:
+ rcu_read_unlock();
error:
- atomic_long_inc(&priv->rx_errors);
kfree_skb(skb);
}

@@ -186,11 +187,15 @@ static void l2tp_eth_delete(struct l2tp_session *session)

if (session) {
spriv = l2tp_session_priv(session);
- dev = spriv->dev;
+
+ rtnl_lock();
+ dev = rtnl_dereference(spriv->dev);
if (dev) {
- unregister_netdev(dev);
- spriv->dev = NULL;
+ unregister_netdevice(dev);
+ rtnl_unlock();
module_put(THIS_MODULE);
+ } else {
+ rtnl_unlock();
}
}
}
@@ -200,35 +205,89 @@ static void l2tp_eth_show(struct seq_file *m, void *arg)
{
struct l2tp_session *session = arg;
struct l2tp_eth_sess *spriv = l2tp_session_priv(session);
- struct net_device *dev = spriv->dev;
+ struct net_device *dev;
+
+ rcu_read_lock();
+ dev = rcu_dereference(spriv->dev);
+ if (!dev) {
+ rcu_read_unlock();
+ return;
+ }
+ dev_hold(dev);
+ rcu_read_unlock();

seq_printf(m, " interface %s\n", dev->name);
+
+ dev_put(dev);
}
#endif

-static int l2tp_eth_create(struct net *net, u32 tunnel_id, u32 session_id, u32 peer_session_id, struct l2tp_session_cfg *cfg)
+static void l2tp_eth_adjust_mtu(struct l2tp_tunnel *tunnel,
+ struct l2tp_session *session,
+ struct net_device *dev)
+{
+ unsigned int overhead = 0;
+ struct dst_entry *dst;
+ u32 l3_overhead = 0;
+
+ /* if the encap is UDP, account for UDP header size */
+ if (tunnel->encap == L2TP_ENCAPTYPE_UDP) {
+ overhead += sizeof(struct udphdr);
+ dev->needed_headroom += sizeof(struct udphdr);
+ }
+ if (session->mtu != 0) {
+ dev->mtu = session->mtu;
+ dev->needed_headroom += session->hdr_len;
+ return;
+ }
+ lock_sock(tunnel->sock);
+ l3_overhead = kernel_sock_ip_overhead(tunnel->sock);
+ release_sock(tunnel->sock);
+ if (l3_overhead == 0) {
+ /* L3 Overhead couldn't be identified, this could be
+ * because tunnel->sock was NULL or the socket's
+ * address family was not IPv4 or IPv6,
+ * dev mtu stays at 1500.
+ */
+ return;
+ }
+ /* Adjust MTU, factor overhead - underlay L3, overlay L2 hdr
+ * UDP overhead, if any, was already factored in above.
+ */
+ overhead += session->hdr_len + ETH_HLEN + l3_overhead;
+
+ /* If PMTU discovery was enabled, use discovered MTU on L2TP device */
+ dst = sk_dst_get(tunnel->sock);
+ if (dst) {
+ /* dst_mtu will use PMTU if found, else fallback to intf MTU */
+ u32 pmtu = dst_mtu(dst);
+
+ if (pmtu != 0)
+ dev->mtu = pmtu;
+ dst_release(dst);
+ }
+ session->mtu = dev->mtu - overhead;
+ dev->mtu = session->mtu;
+ dev->needed_headroom += session->hdr_len;
+}
+
+static int l2tp_eth_create(struct net *net, struct l2tp_tunnel *tunnel,
+ u32 session_id, u32 peer_session_id,
+ struct l2tp_session_cfg *cfg)
{
struct net_device *dev;
char name[IFNAMSIZ];
- struct l2tp_tunnel *tunnel;
struct l2tp_session *session;
struct l2tp_eth *priv;
struct l2tp_eth_sess *spriv;
int rc;
- struct l2tp_eth_net *pn;
-
- tunnel = l2tp_tunnel_find(net, tunnel_id);
- if (!tunnel) {
- rc = -ENODEV;
- goto out;
- }

if (cfg->ifname) {
dev = dev_get_by_name(net, cfg->ifname);
if (dev) {
dev_put(dev);
rc = -EEXIST;
- goto out;
+ goto err;
}
strlcpy(name, cfg->ifname, IFNAMSIZ);
} else
@@ -238,26 +297,22 @@ static int l2tp_eth_create(struct net *net, u32 tunnel_id, u32 session_id, u32 p
peer_session_id, cfg);
if (IS_ERR(session)) {
rc = PTR_ERR(session);
- goto out;
+ goto err;
}

dev = alloc_netdev(sizeof(*priv), name, NET_NAME_UNKNOWN,
l2tp_eth_dev_setup);
if (!dev) {
rc = -ENOMEM;
- goto out_del_session;
+ goto err_sess;
}

dev_net_set(dev, net);
- if (session->mtu == 0)
- session->mtu = dev->mtu - session->hdr_len;
- dev->mtu = session->mtu;
- dev->needed_headroom += session->hdr_len;
+ l2tp_eth_adjust_mtu(tunnel, session, dev);

priv = netdev_priv(dev);
priv->dev = dev;
priv->session = session;
- INIT_LIST_HEAD(&priv->list);

priv->tunnel_sock = tunnel->sock;
session->recv_skb = l2tp_eth_dev_recv;
@@ -267,48 +322,50 @@ static int l2tp_eth_create(struct net *net, u32 tunnel_id, u32 session_id, u32 p
#endif

spriv = l2tp_session_priv(session);
- spriv->dev = dev;

- rc = register_netdev(dev);
- if (rc < 0)
- goto out_del_dev;
+ l2tp_session_inc_refcount(session);

- __module_get(THIS_MODULE);
- /* Must be done after register_netdev() */
- strlcpy(session->ifname, dev->name, IFNAMSIZ);
+ rtnl_lock();

- dev_hold(dev);
- pn = l2tp_eth_pernet(dev_net(dev));
- spin_lock(&pn->l2tp_eth_lock);
- list_add(&priv->list, &pn->l2tp_eth_dev_list);
- spin_unlock(&pn->l2tp_eth_lock);
+ /* Register both device and session while holding the rtnl lock. This
+ * ensures that l2tp_eth_delete() will see that there's a device to
+ * unregister, even if it happened to run before we assign spriv->dev.
+ */
+ rc = l2tp_session_register(session, tunnel);
+ if (rc < 0) {
+ rtnl_unlock();
+ goto err_sess_dev;
+ }

- return 0;
+ rc = register_netdevice(dev);
+ if (rc < 0) {
+ rtnl_unlock();
+ l2tp_session_delete(session);
+ l2tp_session_dec_refcount(session);
+ free_netdev(dev);

-out_del_dev:
- free_netdev(dev);
- spriv->dev = NULL;
-out_del_session:
- l2tp_session_delete(session);
-out:
- return rc;
-}
+ return rc;
+ }

-static __net_init int l2tp_eth_init_net(struct net *net)
-{
- struct l2tp_eth_net *pn = net_generic(net, l2tp_eth_net_id);
+ strlcpy(session->ifname, dev->name, IFNAMSIZ);
+ rcu_assign_pointer(spriv->dev, dev);
+
+ rtnl_unlock();

- INIT_LIST_HEAD(&pn->l2tp_eth_dev_list);
- spin_lock_init(&pn->l2tp_eth_lock);
+ l2tp_session_dec_refcount(session);
+
+ __module_get(THIS_MODULE);

return 0;
-}

-static struct pernet_operations l2tp_eth_net_ops = {
- .init = l2tp_eth_init_net,
- .id = &l2tp_eth_net_id,
- .size = sizeof(struct l2tp_eth_net),
-};
+err_sess_dev:
+ l2tp_session_dec_refcount(session);
+ free_netdev(dev);
+err_sess:
+ kfree(session);
+err:
+ return rc;
+}


static const struct l2tp_nl_cmd_ops l2tp_eth_nl_cmd_ops = {
@@ -323,25 +380,18 @@ static int __init l2tp_eth_init(void)

err = l2tp_nl_register_ops(L2TP_PWTYPE_ETH, &l2tp_eth_nl_cmd_ops);
if (err)
- goto out;
-
- err = register_pernet_device(&l2tp_eth_net_ops);
- if (err)
- goto out_unreg;
+ goto err;

pr_info("L2TP ethernet pseudowire support (L2TPv3)\n");

return 0;

-out_unreg:
- l2tp_nl_unregister_ops(L2TP_PWTYPE_ETH);
-out:
+err:
return err;
}

static void __exit l2tp_eth_exit(void)
{
- unregister_pernet_device(&l2tp_eth_net_ops);
l2tp_nl_unregister_ops(L2TP_PWTYPE_ETH);
}

diff --git a/net/l2tp/l2tp_netlink.c b/net/l2tp/l2tp_netlink.c
index d6fccfdca201..47d7bdff8be8 100644
--- a/net/l2tp/l2tp_netlink.c
+++ b/net/l2tp/l2tp_netlink.c
@@ -72,10 +72,12 @@ static struct l2tp_session *l2tp_nl_session_get(struct genl_info *info,
(info->attrs[L2TP_ATTR_CONN_ID])) {
tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
session_id = nla_get_u32(info->attrs[L2TP_ATTR_SESSION_ID]);
- tunnel = l2tp_tunnel_find(net, tunnel_id);
- if (tunnel)
+ tunnel = l2tp_tunnel_get(net, tunnel_id);
+ if (tunnel) {
session = l2tp_session_get(net, tunnel, session_id,
do_ref);
+ l2tp_tunnel_dec_refcount(tunnel);
+ }
}

return session;
@@ -278,8 +280,8 @@ static int l2tp_nl_cmd_tunnel_delete(struct sk_buff *skb, struct genl_info *info
}
tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);

- tunnel = l2tp_tunnel_find(net, tunnel_id);
- if (tunnel == NULL) {
+ tunnel = l2tp_tunnel_get(net, tunnel_id);
+ if (!tunnel) {
ret = -ENODEV;
goto out;
}
@@ -289,6 +291,8 @@ static int l2tp_nl_cmd_tunnel_delete(struct sk_buff *skb, struct genl_info *info

l2tp_tunnel_delete(tunnel);

+ l2tp_tunnel_dec_refcount(tunnel);
+
out:
return ret;
}
@@ -306,8 +310,8 @@ static int l2tp_nl_cmd_tunnel_modify(struct sk_buff *skb, struct genl_info *info
}
tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);

- tunnel = l2tp_tunnel_find(net, tunnel_id);
- if (tunnel == NULL) {
+ tunnel = l2tp_tunnel_get(net, tunnel_id);
+ if (!tunnel) {
ret = -ENODEV;
goto out;
}
@@ -318,6 +322,8 @@ static int l2tp_nl_cmd_tunnel_modify(struct sk_buff *skb, struct genl_info *info
ret = l2tp_tunnel_notify(&l2tp_nl_family, info,
tunnel, L2TP_CMD_TUNNEL_MODIFY);

+ l2tp_tunnel_dec_refcount(tunnel);
+
out:
return ret;
}
@@ -430,34 +436,37 @@ static int l2tp_nl_cmd_tunnel_get(struct sk_buff *skb, struct genl_info *info)

if (!info->attrs[L2TP_ATTR_CONN_ID]) {
ret = -EINVAL;
- goto out;
+ goto err;
}

tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);

- tunnel = l2tp_tunnel_find(net, tunnel_id);
- if (tunnel == NULL) {
- ret = -ENODEV;
- goto out;
- }
-
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg) {
ret = -ENOMEM;
- goto out;
+ goto err;
+ }
+
+ tunnel = l2tp_tunnel_get(net, tunnel_id);
+ if (!tunnel) {
+ ret = -ENODEV;
+ goto err_nlmsg;
}

ret = l2tp_nl_tunnel_send(msg, info->snd_portid, info->snd_seq,
NLM_F_ACK, tunnel, L2TP_CMD_TUNNEL_GET);
if (ret < 0)
- goto err_out;
+ goto err_nlmsg_tunnel;
+
+ l2tp_tunnel_dec_refcount(tunnel);

return genlmsg_unicast(net, msg, info->snd_portid);

-err_out:
+err_nlmsg_tunnel:
+ l2tp_tunnel_dec_refcount(tunnel);
+err_nlmsg:
nlmsg_free(msg);
-
-out:
+err:
return ret;
}

@@ -501,8 +510,9 @@ static int l2tp_nl_cmd_session_create(struct sk_buff *skb, struct genl_info *inf
ret = -EINVAL;
goto out;
}
+
tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
- tunnel = l2tp_tunnel_find(net, tunnel_id);
+ tunnel = l2tp_tunnel_get(net, tunnel_id);
if (!tunnel) {
ret = -ENODEV;
goto out;
@@ -510,29 +520,24 @@ static int l2tp_nl_cmd_session_create(struct sk_buff *skb, struct genl_info *inf

if (!info->attrs[L2TP_ATTR_SESSION_ID]) {
ret = -EINVAL;
- goto out;
+ goto out_tunnel;
}
session_id = nla_get_u32(info->attrs[L2TP_ATTR_SESSION_ID]);
- session = l2tp_session_find(net, tunnel, session_id);
- if (session) {
- ret = -EEXIST;
- goto out;
- }

if (!info->attrs[L2TP_ATTR_PEER_SESSION_ID]) {
ret = -EINVAL;
- goto out;
+ goto out_tunnel;
}
peer_session_id = nla_get_u32(info->attrs[L2TP_ATTR_PEER_SESSION_ID]);

if (!info->attrs[L2TP_ATTR_PW_TYPE]) {
ret = -EINVAL;
- goto out;
+ goto out_tunnel;
}
cfg.pw_type = nla_get_u16(info->attrs[L2TP_ATTR_PW_TYPE]);
if (cfg.pw_type >= __L2TP_PWTYPE_MAX) {
ret = -EINVAL;
- goto out;
+ goto out_tunnel;
}

if (tunnel->version > 2) {
@@ -551,7 +556,7 @@ static int l2tp_nl_cmd_session_create(struct sk_buff *skb, struct genl_info *inf
u16 len = nla_len(info->attrs[L2TP_ATTR_COOKIE]);
if (len > 8) {
ret = -EINVAL;
- goto out;
+ goto out_tunnel;
}
cfg.cookie_len = len;
memcpy(&cfg.cookie[0], nla_data(info->attrs[L2TP_ATTR_COOKIE]), len);
@@ -560,7 +565,7 @@ static int l2tp_nl_cmd_session_create(struct sk_buff *skb, struct genl_info *inf
u16 len = nla_len(info->attrs[L2TP_ATTR_PEER_COOKIE]);
if (len > 8) {
ret = -EINVAL;
- goto out;
+ goto out_tunnel;
}
cfg.peer_cookie_len = len;
memcpy(&cfg.peer_cookie[0], nla_data(info->attrs[L2TP_ATTR_PEER_COOKIE]), len);
@@ -603,7 +608,7 @@ static int l2tp_nl_cmd_session_create(struct sk_buff *skb, struct genl_info *inf
if ((l2tp_nl_cmd_ops[cfg.pw_type] == NULL) ||
(l2tp_nl_cmd_ops[cfg.pw_type]->session_create == NULL)) {
ret = -EPROTONOSUPPORT;
- goto out;
+ goto out_tunnel;
}

/* Check that pseudowire-specific params are present */
@@ -613,7 +618,7 @@ static int l2tp_nl_cmd_session_create(struct sk_buff *skb, struct genl_info *inf
case L2TP_PWTYPE_ETH_VLAN:
if (!info->attrs[L2TP_ATTR_VLAN_ID]) {
ret = -EINVAL;
- goto out;
+ goto out_tunnel;
}
break;
case L2TP_PWTYPE_ETH:
@@ -627,10 +632,10 @@ static int l2tp_nl_cmd_session_create(struct sk_buff *skb, struct genl_info *inf
break;
}

- ret = -EPROTONOSUPPORT;
- if (l2tp_nl_cmd_ops[cfg.pw_type]->session_create)
- ret = (*l2tp_nl_cmd_ops[cfg.pw_type]->session_create)(net, tunnel_id,
- session_id, peer_session_id, &cfg);
+ ret = l2tp_nl_cmd_ops[cfg.pw_type]->session_create(net, tunnel,
+ session_id,
+ peer_session_id,
+ &cfg);

if (ret >= 0) {
session = l2tp_session_get(net, tunnel, session_id, false);
@@ -641,6 +646,8 @@ static int l2tp_nl_cmd_session_create(struct sk_buff *skb, struct genl_info *inf
}
}

+out_tunnel:
+ l2tp_tunnel_dec_refcount(tunnel);
out:
return ret;
}
diff --git a/net/l2tp/l2tp_ppp.c b/net/l2tp/l2tp_ppp.c
index d919b3e6b548..979fa868a4f1 100644
--- a/net/l2tp/l2tp_ppp.c
+++ b/net/l2tp/l2tp_ppp.c
@@ -122,8 +122,11 @@
struct pppol2tp_session {
int owner; /* pid that opened the socket */

- struct sock *sock; /* Pointer to the session
+ struct mutex sk_lock; /* Protects .sk */
+ struct sock __rcu *sk; /* Pointer to the session
* PPPoX socket */
+ struct sock *__sk; /* Copy of .sk, for cleanup */
+ struct rcu_head rcu; /* For asynchronous release */
struct sock *tunnel_sock; /* Pointer to the tunnel UDP
* socket */
int flags; /* accessed by PPPIOCGFLAGS.
@@ -138,6 +141,24 @@ static const struct ppp_channel_ops pppol2tp_chan_ops = {

static const struct proto_ops pppol2tp_ops;

+/* Retrieves the pppol2tp socket associated to a session.
+ * A reference is held on the returned socket, so this function must be paired
+ * with sock_put().
+ */
+static struct sock *pppol2tp_session_get_sock(struct l2tp_session *session)
+{
+ struct pppol2tp_session *ps = l2tp_session_priv(session);
+ struct sock *sk;
+
+ rcu_read_lock();
+ sk = rcu_dereference(ps->sk);
+ if (sk)
+ sock_hold(sk);
+ rcu_read_unlock();
+
+ return sk;
+}
+
/* Helpers to obtain tunnel/session contexts from sockets.
*/
static inline struct l2tp_session *pppol2tp_sock_to_session(struct sock *sk)
@@ -224,21 +245,22 @@ static void pppol2tp_recv(struct l2tp_session *session, struct sk_buff *skb, int
/* If the socket is bound, send it in to PPP's input queue. Otherwise
* queue it on the session socket.
*/
- sk = ps->sock;
+ rcu_read_lock();
+ sk = rcu_dereference(ps->sk);
if (sk == NULL)
goto no_sock;

if (sk->sk_state & PPPOX_BOUND) {
struct pppox_sock *po;

- l2tp_dbg(session, PPPOL2TP_MSG_DATA,
+ l2tp_dbg(session, L2TP_MSG_DATA,
"%s: recv %d byte data frame, passing to ppp\n",
session->name, data_len);

po = pppox_sk(sk);
ppp_input(&po->chan, skb);
} else {
- l2tp_dbg(session, PPPOL2TP_MSG_DATA,
+ l2tp_dbg(session, L2TP_MSG_DATA,
"%s: recv %d byte data frame, passing to L2TP socket\n",
session->name, data_len);

@@ -247,30 +269,16 @@ static void pppol2tp_recv(struct l2tp_session *session, struct sk_buff *skb, int
kfree_skb(skb);
}
}
+ rcu_read_unlock();

return;

no_sock:
- l2tp_info(session, PPPOL2TP_MSG_DATA, "%s: no socket\n", session->name);
+ rcu_read_unlock();
+ l2tp_info(session, L2TP_MSG_DATA, "%s: no socket\n", session->name);
kfree_skb(skb);
}

-static void pppol2tp_session_sock_hold(struct l2tp_session *session)
-{
- struct pppol2tp_session *ps = l2tp_session_priv(session);
-
- if (ps->sock)
- sock_hold(ps->sock);
-}
-
-static void pppol2tp_session_sock_put(struct l2tp_session *session)
-{
- struct pppol2tp_session *ps = l2tp_session_priv(session);
-
- if (ps->sock)
- sock_put(ps->sock);
-}
-
/************************************************************************
* Transmit handling
***********************************************************************/
@@ -431,17 +439,16 @@ static int pppol2tp_xmit(struct ppp_channel *chan, struct sk_buff *skb)
*/
static void pppol2tp_session_close(struct l2tp_session *session)
{
- struct pppol2tp_session *ps = l2tp_session_priv(session);
- struct sock *sk = ps->sock;
- struct socket *sock = sk->sk_socket;
+ struct sock *sk;

BUG_ON(session->magic != L2TP_SESSION_MAGIC);

- if (sock)
- inet_shutdown(sock, SEND_SHUTDOWN);
-
- /* Don't let the session go away before our socket does */
- l2tp_session_inc_refcount(session);
+ sk = pppol2tp_session_get_sock(session);
+ if (sk) {
+ if (sk->sk_socket)
+ inet_shutdown(sk->sk_socket, SEND_SHUTDOWN);
+ sock_put(sk);
+ }
}

/* Really kill the session socket. (Called from sock_put() if
@@ -461,6 +468,14 @@ static void pppol2tp_session_destruct(struct sock *sk)
}
}

+static void pppol2tp_put_sk(struct rcu_head *head)
+{
+ struct pppol2tp_session *ps;
+
+ ps = container_of(head, typeof(*ps), rcu);
+ sock_put(ps->__sk);
+}
+
/* Called when the PPPoX socket (session) is closed.
*/
static int pppol2tp_release(struct socket *sock)
@@ -486,11 +501,23 @@ static int pppol2tp_release(struct socket *sock)

session = pppol2tp_sock_to_session(sk);

- /* Purge any queued data */
if (session != NULL) {
- __l2tp_session_unhash(session);
- l2tp_session_queue_purge(session);
- sock_put(sk);
+ struct pppol2tp_session *ps;
+
+ l2tp_session_delete(session);
+
+ ps = l2tp_session_priv(session);
+ mutex_lock(&ps->sk_lock);
+ ps->__sk = rcu_dereference_protected(ps->sk,
+ lockdep_is_held(&ps->sk_lock));
+ RCU_INIT_POINTER(ps->sk, NULL);
+ mutex_unlock(&ps->sk_lock);
+ call_rcu(&ps->rcu, pppol2tp_put_sk);
+
+ /* Rely on the sock_put() call at the end of the function for
+ * dropping the reference held by pppol2tp_sock_to_session().
+ * The last reference will be dropped by pppol2tp_put_sk().
+ */
}
release_sock(sk);

@@ -557,16 +584,47 @@ static int pppol2tp_create(struct net *net, struct socket *sock, int kern)
static void pppol2tp_show(struct seq_file *m, void *arg)
{
struct l2tp_session *session = arg;
- struct pppol2tp_session *ps = l2tp_session_priv(session);
+ struct sock *sk;
+
+ sk = pppol2tp_session_get_sock(session);
+ if (sk) {
+ struct pppox_sock *po = pppox_sk(sk);

- if (ps) {
- struct pppox_sock *po = pppox_sk(ps->sock);
- if (po)
- seq_printf(m, " interface %s\n", ppp_dev_name(&po->chan));
+ seq_printf(m, " interface %s\n", ppp_dev_name(&po->chan));
+ sock_put(sk);
}
}
#endif

+static void pppol2tp_session_init(struct l2tp_session *session)
+{
+ struct pppol2tp_session *ps;
+ struct dst_entry *dst;
+
+ session->recv_skb = pppol2tp_recv;
+ session->session_close = pppol2tp_session_close;
+#if IS_ENABLED(CONFIG_L2TP_DEBUGFS)
+ session->show = pppol2tp_show;
+#endif
+
+ ps = l2tp_session_priv(session);
+ mutex_init(&ps->sk_lock);
+ ps->tunnel_sock = session->tunnel->sock;
+ ps->owner = current->pid;
+
+ /* If PMTU discovery was enabled, use the MTU that was discovered */
+ dst = sk_dst_get(session->tunnel->sock);
+ if (dst) {
+ u32 pmtu = dst_mtu(dst);
+
+ if (pmtu) {
+ session->mtu = pmtu - PPPOL2TP_HEADER_OVERHEAD;
+ session->mru = pmtu - PPPOL2TP_HEADER_OVERHEAD;
+ }
+ dst_release(dst);
+ }
+}
+
/* connect() handler. Attach a PPPoX socket to a tunnel UDP socket
*/
static int pppol2tp_connect(struct socket *sock, struct sockaddr *uservaddr,
@@ -578,7 +636,6 @@ static int pppol2tp_connect(struct socket *sock, struct sockaddr *uservaddr,
struct l2tp_session *session = NULL;
struct l2tp_tunnel *tunnel;
struct pppol2tp_session *ps;
- struct dst_entry *dst;
struct l2tp_session_cfg cfg = { 0, };
int error = 0;
u32 tunnel_id, peer_tunnel_id;
@@ -700,13 +757,17 @@ static int pppol2tp_connect(struct socket *sock, struct sockaddr *uservaddr,
/* Using a pre-existing session is fine as long as it hasn't
* been connected yet.
*/
- if (ps->sock) {
+ mutex_lock(&ps->sk_lock);
+ if (rcu_dereference_protected(ps->sk,
+ lockdep_is_held(&ps->sk_lock))) {
+ mutex_unlock(&ps->sk_lock);
error = -EEXIST;
goto end;
}

/* consistency checks */
if (ps->tunnel_sock != tunnel->sock) {
+ mutex_unlock(&ps->sk_lock);
error = -EEXIST;
goto end;
}
@@ -722,35 +783,19 @@ static int pppol2tp_connect(struct socket *sock, struct sockaddr *uservaddr,
error = PTR_ERR(session);
goto end;
}
- }
-
- /* Associate session with its PPPoL2TP socket */
- ps = l2tp_session_priv(session);
- ps->owner = current->pid;
- ps->sock = sk;
- ps->tunnel_sock = tunnel->sock;

- session->recv_skb = pppol2tp_recv;
- session->session_close = pppol2tp_session_close;
-#if IS_ENABLED(CONFIG_L2TP_DEBUGFS)
- session->show = pppol2tp_show;
-#endif
-
- /* We need to know each time a skb is dropped from the reorder
- * queue.
- */
- session->ref = pppol2tp_session_sock_hold;
- session->deref = pppol2tp_session_sock_put;
-
- /* If PMTU discovery was enabled, use the MTU that was discovered */
- dst = sk_dst_get(tunnel->sock);
- if (dst != NULL) {
- u32 pmtu = dst_mtu(dst);
+ pppol2tp_session_init(session);
+ ps = l2tp_session_priv(session);
+ l2tp_session_inc_refcount(session);

- if (pmtu != 0)
- session->mtu = session->mru = pmtu -
- PPPOL2TP_HEADER_OVERHEAD;
- dst_release(dst);
+ mutex_lock(&ps->sk_lock);
+ error = l2tp_session_register(session, tunnel);
+ if (error < 0) {
+ mutex_unlock(&ps->sk_lock);
+ kfree(session);
+ goto end;
+ }
+ drop_refcnt = true;
}

/* Special case: if source & dest session_id == 0x0000, this
@@ -775,14 +820,25 @@ static int pppol2tp_connect(struct socket *sock, struct sockaddr *uservaddr,
po->chan.mtu = session->mtu;

error = ppp_register_net_channel(sock_net(sk), &po->chan);
- if (error)
+ if (error) {
+ mutex_unlock(&ps->sk_lock);
goto end;
+ }

out_no_ppp:
/* This is how we get the session context from the socket. */
sk->sk_user_data = session;
+ rcu_assign_pointer(ps->sk, sk);
+ mutex_unlock(&ps->sk_lock);
+
+ /* Keep the reference we've grabbed on the session: sk doesn't expect
+ * the session to disappear. pppol2tp_session_destruct() is responsible
+ * for dropping it.
+ */
+ drop_refcnt = false;
+
sk->sk_state = PPPOX_CONNECTED;
- l2tp_info(session, PPPOL2TP_MSG_CONTROL, "%s: created\n",
+ l2tp_info(session, L2TP_MSG_CONTROL, "%s: created\n",
session->name);

end:
@@ -795,25 +851,19 @@ static int pppol2tp_connect(struct socket *sock, struct sockaddr *uservaddr,

#ifdef CONFIG_L2TP_V3

-/* Called when creating sessions via the netlink interface.
- */
-static int pppol2tp_session_create(struct net *net, u32 tunnel_id, u32 session_id, u32 peer_session_id, struct l2tp_session_cfg *cfg)
+/* Called when creating sessions via the netlink interface. */
+static int pppol2tp_session_create(struct net *net, struct l2tp_tunnel *tunnel,
+ u32 session_id, u32 peer_session_id,
+ struct l2tp_session_cfg *cfg)
{
int error;
- struct l2tp_tunnel *tunnel;
struct l2tp_session *session;
- struct pppol2tp_session *ps;
-
- tunnel = l2tp_tunnel_find(net, tunnel_id);
-
- /* Error if we can't find the tunnel */
- error = -ENOENT;
- if (tunnel == NULL)
- goto out;

/* Error if tunnel socket is not prepped */
- if (tunnel->sock == NULL)
- goto out;
+ if (!tunnel->sock) {
+ error = -ENOENT;
+ goto err;
+ }

/* Default MTU values. */
if (cfg->mtu == 0)
@@ -827,18 +877,20 @@ static int pppol2tp_session_create(struct net *net, u32 tunnel_id, u32 session_i
peer_session_id, cfg);
if (IS_ERR(session)) {
error = PTR_ERR(session);
- goto out;
+ goto err;
}

- ps = l2tp_session_priv(session);
- ps->tunnel_sock = tunnel->sock;
+ pppol2tp_session_init(session);

- l2tp_info(session, PPPOL2TP_MSG_CONTROL, "%s: created\n",
- session->name);
+ error = l2tp_session_register(session, tunnel);
+ if (error < 0)
+ goto err_sess;

- error = 0;
+ return 0;

-out:
+err_sess:
+ kfree(session);
+err:
return error;
}

@@ -995,16 +1047,14 @@ static int pppol2tp_session_ioctl(struct l2tp_session *session,
struct l2tp_tunnel *tunnel = session->tunnel;
struct pppol2tp_ioc_stats stats;

- l2tp_dbg(session, PPPOL2TP_MSG_CONTROL,
+ l2tp_dbg(session, L2TP_MSG_CONTROL,
"%s: pppol2tp_session_ioctl(cmd=%#x, arg=%#lx)\n",
session->name, cmd, arg);

- sk = ps->sock;
+ sk = pppol2tp_session_get_sock(session);
if (!sk)
return -EBADR;

- sock_hold(sk);
-
switch (cmd) {
case SIOCGIFMTU:
err = -ENXIO;
@@ -1018,7 +1068,7 @@ static int pppol2tp_session_ioctl(struct l2tp_session *session,
if (copy_to_user((void __user *) arg, &ifr, sizeof(struct ifreq)))
break;

- l2tp_info(session, PPPOL2TP_MSG_CONTROL, "%s: get mtu=%d\n",
+ l2tp_info(session, L2TP_MSG_CONTROL, "%s: get mtu=%d\n",
session->name, session->mtu);
err = 0;
break;
@@ -1034,7 +1084,7 @@ static int pppol2tp_session_ioctl(struct l2tp_session *session,

session->mtu = ifr.ifr_mtu;

- l2tp_info(session, PPPOL2TP_MSG_CONTROL, "%s: set mtu=%d\n",
+ l2tp_info(session, L2TP_MSG_CONTROL, "%s: set mtu=%d\n",
session->name, session->mtu);
err = 0;
break;
@@ -1048,7 +1098,7 @@ static int pppol2tp_session_ioctl(struct l2tp_session *session,
if (put_user(session->mru, (int __user *) arg))
break;

- l2tp_info(session, PPPOL2TP_MSG_CONTROL, "%s: get mru=%d\n",
+ l2tp_info(session, L2TP_MSG_CONTROL, "%s: get mru=%d\n",
session->name, session->mru);
err = 0;
break;
@@ -1063,7 +1113,7 @@ static int pppol2tp_session_ioctl(struct l2tp_session *session,
break;

session->mru = val;
- l2tp_info(session, PPPOL2TP_MSG_CONTROL, "%s: set mru=%d\n",
+ l2tp_info(session, L2TP_MSG_CONTROL, "%s: set mru=%d\n",
session->name, session->mru);
err = 0;
break;
@@ -1073,7 +1123,7 @@ static int pppol2tp_session_ioctl(struct l2tp_session *session,
if (put_user(ps->flags, (int __user *) arg))
break;

- l2tp_info(session, PPPOL2TP_MSG_CONTROL, "%s: get flags=%d\n",
+ l2tp_info(session, L2TP_MSG_CONTROL, "%s: get flags=%d\n",
session->name, ps->flags);
err = 0;
break;
@@ -1083,7 +1133,7 @@ static int pppol2tp_session_ioctl(struct l2tp_session *session,
if (get_user(val, (int __user *) arg))
break;
ps->flags = val;
- l2tp_info(session, PPPOL2TP_MSG_CONTROL, "%s: set flags=%d\n",
+ l2tp_info(session, L2TP_MSG_CONTROL, "%s: set flags=%d\n",
session->name, ps->flags);
err = 0;
break;
@@ -1100,7 +1150,7 @@ static int pppol2tp_session_ioctl(struct l2tp_session *session,
if (copy_to_user((void __user *) arg, &stats,
sizeof(stats)))
break;
- l2tp_info(session, PPPOL2TP_MSG_CONTROL, "%s: get L2TP stats\n",
+ l2tp_info(session, L2TP_MSG_CONTROL, "%s: get L2TP stats\n",
session->name);
err = 0;
break;
@@ -1128,7 +1178,7 @@ static int pppol2tp_tunnel_ioctl(struct l2tp_tunnel *tunnel,
struct sock *sk;
struct pppol2tp_ioc_stats stats;

- l2tp_dbg(tunnel, PPPOL2TP_MSG_CONTROL,
+ l2tp_dbg(tunnel, L2TP_MSG_CONTROL,
"%s: pppol2tp_tunnel_ioctl(cmd=%#x, arg=%#lx)\n",
tunnel->name, cmd, arg);

@@ -1171,7 +1221,7 @@ static int pppol2tp_tunnel_ioctl(struct l2tp_tunnel *tunnel,
err = -EFAULT;
break;
}
- l2tp_info(tunnel, PPPOL2TP_MSG_CONTROL, "%s: get L2TP stats\n",
+ l2tp_info(tunnel, L2TP_MSG_CONTROL, "%s: get L2TP stats\n",
tunnel->name);
err = 0;
break;
@@ -1261,7 +1311,7 @@ static int pppol2tp_tunnel_setsockopt(struct sock *sk,
switch (optname) {
case PPPOL2TP_SO_DEBUG:
tunnel->debug = val;
- l2tp_info(tunnel, PPPOL2TP_MSG_CONTROL, "%s: set debug=%x\n",
+ l2tp_info(tunnel, L2TP_MSG_CONTROL, "%s: set debug=%x\n",
tunnel->name, tunnel->debug);
break;

@@ -1280,7 +1330,6 @@ static int pppol2tp_session_setsockopt(struct sock *sk,
int optname, int val)
{
int err = 0;
- struct pppol2tp_session *ps = l2tp_session_priv(session);

switch (optname) {
case PPPOL2TP_SO_RECVSEQ:
@@ -1289,7 +1338,7 @@ static int pppol2tp_session_setsockopt(struct sock *sk,
break;
}
session->recv_seq = val ? -1 : 0;
- l2tp_info(session, PPPOL2TP_MSG_CONTROL,
+ l2tp_info(session, L2TP_MSG_CONTROL,
"%s: set recv_seq=%d\n",
session->name, session->recv_seq);
break;
@@ -1301,13 +1350,13 @@ static int pppol2tp_session_setsockopt(struct sock *sk,
}
session->send_seq = val ? -1 : 0;
{
- struct sock *ssk = ps->sock;
- struct pppox_sock *po = pppox_sk(ssk);
+ struct pppox_sock *po = pppox_sk(sk);
+
po->chan.hdrlen = val ? PPPOL2TP_L2TP_HDR_SIZE_SEQ :
PPPOL2TP_L2TP_HDR_SIZE_NOSEQ;
}
l2tp_session_set_header_len(session, session->tunnel->version);
- l2tp_info(session, PPPOL2TP_MSG_CONTROL,
+ l2tp_info(session, L2TP_MSG_CONTROL,
"%s: set send_seq=%d\n",
session->name, session->send_seq);
break;
@@ -1318,20 +1367,20 @@ static int pppol2tp_session_setsockopt(struct sock *sk,
break;
}
session->lns_mode = val ? -1 : 0;
- l2tp_info(session, PPPOL2TP_MSG_CONTROL,
+ l2tp_info(session, L2TP_MSG_CONTROL,
"%s: set lns_mode=%d\n",
session->name, session->lns_mode);
break;

case PPPOL2TP_SO_DEBUG:
session->debug = val;
- l2tp_info(session, PPPOL2TP_MSG_CONTROL, "%s: set debug=%x\n",
+ l2tp_info(session, L2TP_MSG_CONTROL, "%s: set debug=%x\n",
session->name, session->debug);
break;

case PPPOL2TP_SO_REORDERTO:
session->reorder_timeout = msecs_to_jiffies(val);
- l2tp_info(session, PPPOL2TP_MSG_CONTROL,
+ l2tp_info(session, L2TP_MSG_CONTROL,
"%s: set reorder_timeout=%d\n",
session->name, session->reorder_timeout);
break;
@@ -1412,7 +1461,7 @@ static int pppol2tp_tunnel_getsockopt(struct sock *sk,
switch (optname) {
case PPPOL2TP_SO_DEBUG:
*val = tunnel->debug;
- l2tp_info(tunnel, PPPOL2TP_MSG_CONTROL, "%s: get debug=%x\n",
+ l2tp_info(tunnel, L2TP_MSG_CONTROL, "%s: get debug=%x\n",
tunnel->name, tunnel->debug);
break;

@@ -1435,31 +1484,31 @@ static int pppol2tp_session_getsockopt(struct sock *sk,
switch (optname) {
case PPPOL2TP_SO_RECVSEQ:
*val = session->recv_seq;
- l2tp_info(session, PPPOL2TP_MSG_CONTROL,
+ l2tp_info(session, L2TP_MSG_CONTROL,
"%s: get recv_seq=%d\n", session->name, *val);
break;

case PPPOL2TP_SO_SENDSEQ:
*val = session->send_seq;
- l2tp_info(session, PPPOL2TP_MSG_CONTROL,
+ l2tp_info(session, L2TP_MSG_CONTROL,
"%s: get send_seq=%d\n", session->name, *val);
break;

case PPPOL2TP_SO_LNSMODE:
*val = session->lns_mode;
- l2tp_info(session, PPPOL2TP_MSG_CONTROL,
+ l2tp_info(session, L2TP_MSG_CONTROL,
"%s: get lns_mode=%d\n", session->name, *val);
break;

case PPPOL2TP_SO_DEBUG:
*val = session->debug;
- l2tp_info(session, PPPOL2TP_MSG_CONTROL, "%s: get debug=%d\n",
+ l2tp_info(session, L2TP_MSG_CONTROL, "%s: get debug=%d\n",
session->name, *val);
break;

case PPPOL2TP_SO_REORDERTO:
*val = (int) jiffies_to_msecs(session->reorder_timeout);
- l2tp_info(session, PPPOL2TP_MSG_CONTROL,
+ l2tp_info(session, L2TP_MSG_CONTROL,
"%s: get reorder_timeout=%d\n", session->name, *val);
break;

@@ -1638,8 +1687,9 @@ static void pppol2tp_seq_session_show(struct seq_file *m, void *v)
{
struct l2tp_session *session = v;
struct l2tp_tunnel *tunnel = session->tunnel;
- struct pppol2tp_session *ps = l2tp_session_priv(session);
- struct pppox_sock *po = pppox_sk(ps->sock);
+ unsigned char state;
+ char user_data_ok;
+ struct sock *sk;
u32 ip = 0;
u16 port = 0;

@@ -1649,6 +1699,15 @@ static void pppol2tp_seq_session_show(struct seq_file *m, void *v)
port = ntohs(inet->inet_sport);
}

+ sk = pppol2tp_session_get_sock(session);
+ if (sk) {
+ state = sk->sk_state;
+ user_data_ok = (session == sk->sk_user_data) ? 'Y' : 'N';
+ } else {
+ state = 0;
+ user_data_ok = 'N';
+ }
+
seq_printf(m, " SESSION '%s' %08X/%d %04X/%04X -> "
"%04X/%04X %d %c\n",
session->name, ip, port,
@@ -1656,9 +1715,7 @@ static void pppol2tp_seq_session_show(struct seq_file *m, void *v)
session->session_id,
tunnel->peer_tunnel_id,
session->peer_session_id,
- ps->sock->sk_state,
- (session == ps->sock->sk_user_data) ?
- 'Y' : 'N');
+ state, user_data_ok);
seq_printf(m, " %d/%d/%c/%c/%s %08x %u\n",
session->mtu, session->mru,
session->recv_seq ? 'R' : '-',
@@ -1675,8 +1732,12 @@ static void pppol2tp_seq_session_show(struct seq_file *m, void *v)
atomic_long_read(&session->stats.rx_bytes),
atomic_long_read(&session->stats.rx_errors));

- if (po)
+ if (sk) {
+ struct pppox_sock *po = pppox_sk(sk);
+
seq_printf(m, " interface %s\n", ppp_dev_name(&po->chan));
+ sock_put(sk);
+ }
}

static int pppol2tp_seq_show(struct seq_file *m, void *v)
diff --git a/net/socket.c b/net/socket.c
index 65afc8ec68d4..88abc72df2a6 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -3321,3 +3321,49 @@ int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how)
return sock->ops->shutdown(sock, how);
}
EXPORT_SYMBOL(kernel_sock_shutdown);
+
+/* This routine returns the IP overhead imposed by a socket i.e.
+ * the length of the underlying IP header, depending on whether
+ * this is an IPv4 or IPv6 socket and the length from IP options turned
+ * on at the socket. Assumes that the caller has a lock on the socket.
+ */
+u32 kernel_sock_ip_overhead(struct sock *sk)
+{
+ struct inet_sock *inet;
+ struct ip_options_rcu *opt;
+ u32 overhead = 0;
+ bool owned_by_user;
+#if IS_ENABLED(CONFIG_IPV6)
+ struct ipv6_pinfo *np;
+ struct ipv6_txoptions *optv6 = NULL;
+#endif /* IS_ENABLED(CONFIG_IPV6) */
+
+ if (!sk)
+ return overhead;
+
+ owned_by_user = sock_owned_by_user(sk);
+ switch (sk->sk_family) {
+ case AF_INET:
+ inet = inet_sk(sk);
+ overhead += sizeof(struct iphdr);
+ opt = rcu_dereference_protected(inet->inet_opt,
+ owned_by_user);
+ if (opt)
+ overhead += opt->opt.optlen;
+ return overhead;
+#if IS_ENABLED(CONFIG_IPV6)
+ case AF_INET6:
+ np = inet6_sk(sk);
+ overhead += sizeof(struct ipv6hdr);
+ if (np)
+ optv6 = rcu_dereference_protected(np->opt,
+ owned_by_user);
+ if (optv6)
+ overhead += (optv6->opt_flen + optv6->opt_nflen);
+ return overhead;
+#endif /* IS_ENABLED(CONFIG_IPV6) */
+ default: /* Returns 0 overhead if the socket is not ipv4 or ipv6 */
+ return overhead;
+ }
+}
+EXPORT_SYMBOL(kernel_sock_ip_overhead);
diff --git a/scripts/gcc-plugins/Makefile b/scripts/gcc-plugins/Makefile
index 8b29dc17c73c..2cad963c4fb7 100644
--- a/scripts/gcc-plugins/Makefile
+++ b/scripts/gcc-plugins/Makefile
@@ -9,6 +9,7 @@ else
HOST_EXTRACXXFLAGS += -I$(GCC_PLUGINS_DIR)/include -I$(src) -std=gnu++98 -fno-rtti
HOST_EXTRACXXFLAGS += -fno-exceptions -fasynchronous-unwind-tables -ggdb
HOST_EXTRACXXFLAGS += -Wno-narrowing -Wno-unused-variable
+ HOST_EXTRACXXFLAGS += -Wno-format-diag
export HOST_EXTRACXXFLAGS
endif

diff --git a/scripts/gcc-plugins/gcc-common.h b/scripts/gcc-plugins/gcc-common.h
index 08fe09c28bd2..6792915f5174 100644
--- a/scripts/gcc-plugins/gcc-common.h
+++ b/scripts/gcc-plugins/gcc-common.h
@@ -31,7 +31,9 @@
#include "ggc.h"
#include "timevar.h"

+#if BUILDING_GCC_VERSION < 10000
#include "params.h"
+#endif

#if BUILDING_GCC_VERSION <= 4009
#include "pointer-set.h"
@@ -796,6 +798,7 @@ static inline gimple gimple_build_assign_with_ops(enum tree_code subcode, tree l
return gimple_build_assign(lhs, subcode, op1, op2 PASS_MEM_STAT);
}

+#if BUILDING_GCC_VERSION < 10000
template <>
template <>
inline bool is_a_helper<const ggoto *>::test(const_gimple gs)
@@ -809,6 +812,7 @@ inline bool is_a_helper<const greturn *>::test(const_gimple gs)
{
return gs->code == GIMPLE_RETURN;
}
+#endif

static inline gasm *as_a_gasm(gimple stmt)
{
diff --git a/security/integrity/evm/evm_crypto.c b/security/integrity/evm/evm_crypto.c
index c783fefa558a..e034dc21421e 100644
--- a/security/integrity/evm/evm_crypto.c
+++ b/security/integrity/evm/evm_crypto.c
@@ -90,7 +90,7 @@ static struct shash_desc *init_desc(char type)
algo = evm_hash;
}

- if (*tfm == NULL) {
+ if (IS_ERR_OR_NULL(*tfm)) {
mutex_lock(&mutex);
if (*tfm)
goto out;
diff --git a/security/integrity/ima/ima_fs.c b/security/integrity/ima/ima_fs.c
index 44b44d7e0dbc..853a7d2333b3 100644
--- a/security/integrity/ima/ima_fs.c
+++ b/security/integrity/ima/ima_fs.c
@@ -331,8 +331,7 @@ static ssize_t ima_write_policy(struct file *file, const char __user *buf,
integrity_audit_msg(AUDIT_INTEGRITY_STATUS, NULL, NULL,
"policy_update", "signed policy required",
1, 0);
- if (ima_appraise & IMA_APPRAISE_ENFORCE)
- result = -EACCES;
+ result = -EACCES;
} else {
result = ima_parse_add_rule(data);
}
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
index f09ae7efc695..f0052c06d065 100644
--- a/sound/core/pcm_lib.c
+++ b/sound/core/pcm_lib.c
@@ -456,6 +456,7 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream,

no_delta_check:
if (runtime->status->hw_ptr == new_hw_ptr) {
+ runtime->hw_ptr_jiffies = curr_jiffies;
update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp);
return 0;
}
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