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Subject[PATCH 2.6.17-rc6 7/9] Remove some of the kmemleak false positives
Date
From: Catalin Marinas <catalin.marinas@arm.com>

There are allocations for which the main pointer cannot be found but they
are not memory leaks. This patch fixes some of them.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---

arch/i386/kernel/setup.c | 1 +
drivers/base/platform.c | 1 +
drivers/hwmon/w83627hf.c | 1 +
drivers/scsi/hosts.c | 1 +
fs/ext3/dir.c | 1 +
ipc/util.c | 2 ++
kernel/params.c | 7 +++++--
mm/slab.c | 1 +
net/core/dev.c | 1 +
net/sched/sch_generic.c | 1 +
10 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/arch/i386/kernel/setup.c b/arch/i386/kernel/setup.c
index dd6b0e3..0866fcf 100644
--- a/arch/i386/kernel/setup.c
+++ b/arch/i386/kernel/setup.c
@@ -1323,6 +1323,7 @@ legacy_init_iomem_resources(struct resou
if (e820.map[i].addr + e820.map[i].size > 0x100000000ULL)
continue;
res = kzalloc(sizeof(struct resource), GFP_ATOMIC);
+ memleak_not_leak(res);
switch (e820.map[i].type) {
case E820_RAM: res->name = "System RAM"; break;
case E820_ACPI: res->name = "ACPI Tables"; break;
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 83f5c59..f818909 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -166,6 +166,7 @@ struct platform_device *platform_device_
struct platform_object *pa;

pa = kzalloc(sizeof(struct platform_object) + strlen(name), GFP_KERNEL);
+ memleak_padding(pa, 0, sizeof(struct platform_object));
if (pa) {
strcpy(pa->name, name);
pa->pdev.name = pa->name;
diff --git a/drivers/hwmon/w83627hf.c b/drivers/hwmon/w83627hf.c
index 71fb7f1..4208d37 100644
--- a/drivers/hwmon/w83627hf.c
+++ b/drivers/hwmon/w83627hf.c
@@ -1065,6 +1065,7 @@ static int w83627hf_detect(struct i2c_ad
err = -ENOMEM;
goto ERROR1;
}
+ memleak_container(struct w83627hf_data, client);

new_client = &data->client;
i2c_set_clientdata(new_client, data);
diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c
index dfcb96f..0a05151 100644
--- a/drivers/scsi/hosts.c
+++ b/drivers/scsi/hosts.c
@@ -297,6 +297,7 @@ struct Scsi_Host *scsi_host_alloc(struct
shost = kzalloc(sizeof(struct Scsi_Host) + privsize, gfp_mask);
if (!shost)
return NULL;
+ memleak_padding(shost, 0, sizeof(struct Scsi_Host));

spin_lock_init(&shost->default_lock);
scsi_assign_lock(shost, &shost->default_lock);
diff --git a/fs/ext3/dir.c b/fs/ext3/dir.c
index f37528e..f66fbed 100644
--- a/fs/ext3/dir.c
+++ b/fs/ext3/dir.c
@@ -346,6 +346,7 @@ int ext3_htree_store_dirent(struct file
new_fn = kmalloc(len, GFP_KERNEL);
if (!new_fn)
return -ENOMEM;
+ memleak_padding(new_fn, 0, sizeof(struct fname));
memset(new_fn, 0, len);
new_fn->hash = hash;
new_fn->minor_hash = minor_hash;
diff --git a/ipc/util.c b/ipc/util.c
index 8193299..dcf3e2d 100644
--- a/ipc/util.c
+++ b/ipc/util.c
@@ -389,6 +389,7 @@ void* ipc_rcu_alloc(int size)
*/
if (rcu_use_vmalloc(size)) {
out = vmalloc(HDRLEN_VMALLOC + size);
+ memleak_not_leak(out);
if (out) {
out += HDRLEN_VMALLOC;
container_of(out, struct ipc_rcu_hdr, data)->is_vmalloc = 1;
@@ -396,6 +397,7 @@ void* ipc_rcu_alloc(int size)
}
} else {
out = kmalloc(HDRLEN_KMALLOC + size, GFP_KERNEL);
+ memleak_not_leak(out);
if (out) {
out += HDRLEN_KMALLOC;
container_of(out, struct ipc_rcu_hdr, data)->is_vmalloc = 0;
diff --git a/kernel/params.c b/kernel/params.c
index af43ecd..a30beaf 100644
--- a/kernel/params.c
+++ b/kernel/params.c
@@ -548,6 +548,7 @@ static void __init kernel_param_sysfs_se
unsigned int name_skip)
{
struct module_kobject *mk;
+ struct module_param_attrs *mp;

mk = kzalloc(sizeof(struct module_kobject), GFP_KERNEL);
BUG_ON(!mk);
@@ -557,11 +558,13 @@ static void __init kernel_param_sysfs_se
kobject_set_name(&mk->kobj, name);
kobject_register(&mk->kobj);

+ mp = param_sysfs_setup(mk, kparam, num_params, name_skip);
/* no need to keep the kobject if no parameter is exported */
- if (!param_sysfs_setup(mk, kparam, num_params, name_skip)) {
+ if (!mp) {
kobject_unregister(&mk->kobj);
kfree(mk);
- }
+ } else
+ memleak_not_leak(mp);
}

/*
diff --git a/mm/slab.c b/mm/slab.c
index 0d38f74..395e7bb 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -3357,6 +3357,7 @@ void *__alloc_percpu(size_t size)
memset(pdata->ptrs[i], 0, size);
}

+ memleak_not_leak(pdata);
/* Catch derefs w/o wrappers */
return (void *)(~(unsigned long)pdata);

diff --git a/net/core/dev.c b/net/core/dev.c
index 4fba549..2ab745f 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3103,6 +3103,7 @@ struct net_device *alloc_netdev(int size
dev = (struct net_device *)
(((long)p + NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
dev->padded = (char *)dev - (char *)p;
+ memleak_padding(p, dev->padded, sizeof(struct net_device));

if (sizeof_priv)
dev->priv = netdev_priv(dev);
diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index 138ea92..5422889 100644
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -427,6 +427,7 @@ struct Qdisc *qdisc_alloc(struct net_dev
memset(p, 0, size);
sch = (struct Qdisc *) QDISC_ALIGN((unsigned long) p);
sch->padded = (char *) sch - (char *) p;
+ memleak_padding(p, sch->padded, sizeof(struct Qdisc));

INIT_LIST_HEAD(&sch->list);
skb_queue_head_init(&sch->q);
-
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