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Subject[PATCH 06/14] USB: io_ti: fix DMA buffers on stack
Date

Signed-off-by: Johan Hovold <jhovold@gmail.com>
---
drivers/usb/serial/io_ti.c | 66 ++++++++++++++++++++++++++++++++------------
1 files changed, 48 insertions(+), 18 deletions(-)
diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c
index d4cc0f7..1691f07 100644
--- a/drivers/usb/serial/io_ti.c
+++ b/drivers/usb/serial/io_ti.c
@@ -413,11 +413,18 @@ static int write_boot_mem(struct edgeport_serial *serial,
{
int status = 0;
int i;
- __u8 temp;
+ u8 *temp;

/* Must do a read before write */
if (!serial->TiReadI2C) {
- status = read_boot_mem(serial, 0, 1, &temp);
+ temp = kmalloc(1, GFP_KERNEL);
+ if (!temp) {
+ dev_err(&serial->serial->dev->dev,
+ "%s - out of memory\n", __func__);
+ return -ENOMEM;
+ }
+ status = read_boot_mem(serial, 0, 1, temp);
+ kfree(temp);
if (status)
return status;
}
@@ -935,37 +942,47 @@ static int build_i2c_fw_hdr(__u8 *header, struct device *dev)
static int i2c_type_bootmode(struct edgeport_serial *serial)
{
int status;
- __u8 data;
+ u8 *data;
+
+ data = kmalloc(1, GFP_KERNEL);
+ if (!data) {
+ dev_err(&serial->serial->dev->dev,
+ "%s - out of memory\n", __func__);
+ return -ENOMEM;
+ }

/* Try to read type 2 */
status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
- DTK_ADDR_SPACE_I2C_TYPE_II, 0, &data, 0x01);
+ DTK_ADDR_SPACE_I2C_TYPE_II, 0, data, 0x01);
if (status)
dbg("%s - read 2 status error = %d", __func__, status);
else
- dbg("%s - read 2 data = 0x%x", __func__, data);
- if ((!status) && (data == UMP5152 || data == UMP3410)) {
+ dbg("%s - read 2 data = 0x%x", __func__, *data);
+ if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
dbg("%s - ROM_TYPE_II", __func__);
serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
- return 0;
+ goto out;
}

/* Try to read type 3 */
status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
- DTK_ADDR_SPACE_I2C_TYPE_III, 0, &data, 0x01);
+ DTK_ADDR_SPACE_I2C_TYPE_III, 0, data, 0x01);
if (status)
dbg("%s - read 3 status error = %d", __func__, status);
else
- dbg("%s - read 2 data = 0x%x", __func__, data);
- if ((!status) && (data == UMP5152 || data == UMP3410)) {
+ dbg("%s - read 2 data = 0x%x", __func__, *data);
+ if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
dbg("%s - ROM_TYPE_III", __func__);
serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III;
- return 0;
+ goto out;
}

dbg("%s - Unknown", __func__);
serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
- return -ENODEV;
+ status = -ENODEV;
+out:
+ kfree(data);
+ return status;
}

static int bulk_xfer(struct usb_serial *serial, void *buffer,
@@ -1113,7 +1130,7 @@ static int download_fw(struct edgeport_serial *serial)
I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc);
if (start_address != 0) {
struct ti_i2c_firmware_rec *firmware_version;
- __u8 record;
+ u8 *record;

dbg("%s - Found Type FIRMWARE (Type 2) record",
__func__);
@@ -1165,6 +1182,15 @@ static int download_fw(struct edgeport_serial *serial)
OperationalMajorVersion,
OperationalMinorVersion);

+ record = kmalloc(1, GFP_KERNEL);
+ if (!record) {
+ dev_err(dev, "%s - out of memory.\n",
+ __func__);
+ kfree(firmware_version);
+ kfree(rom_desc);
+ kfree(ti_manuf_desc);
+ return -ENOMEM;
+ }
/* In order to update the I2C firmware we must
* change the type 2 record to type 0xF2. This
* will force the UMP to come up in Boot Mode.
@@ -1177,13 +1203,14 @@ static int download_fw(struct edgeport_serial *serial)
* firmware will update the record type from
* 0xf2 to 0x02.
*/
- record = I2C_DESC_TYPE_FIRMWARE_BLANK;
+ *record = I2C_DESC_TYPE_FIRMWARE_BLANK;

/* Change the I2C Firmware record type to
0xf2 to trigger an update */
status = write_rom(serial, start_address,
- sizeof(record), &record);
+ sizeof(*record), record);
if (status) {
+ kfree(record);
kfree(firmware_version);
kfree(rom_desc);
kfree(ti_manuf_desc);
@@ -1196,19 +1223,21 @@ static int download_fw(struct edgeport_serial *serial)
*/
status = read_rom(serial,
start_address,
- sizeof(record),
- &record);
+ sizeof(*record),
+ record);
if (status) {
+ kfree(record);
kfree(firmware_version);
kfree(rom_desc);
kfree(ti_manuf_desc);
return status;
}

- if (record != I2C_DESC_TYPE_FIRMWARE_BLANK) {
+ if (*record != I2C_DESC_TYPE_FIRMWARE_BLANK) {
dev_err(dev,
"%s - error resetting device\n",
__func__);
+ kfree(record);
kfree(firmware_version);
kfree(rom_desc);
kfree(ti_manuf_desc);
@@ -1226,6 +1255,7 @@ static int download_fw(struct edgeport_serial *serial)
__func__, status);

/* return an error on purpose. */
+ kfree(record);
kfree(firmware_version);
kfree(rom_desc);
kfree(ti_manuf_desc);
--
1.6.6


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