Commit 33af79d1 authored by Chandra Seetharaman's avatar Chandra Seetharaman Committed by Linus Torvalds

scsi_dh: Verify "dev" is a sdev before accessing it.

Before accessing the device data structure in hardware handlers,
make sure it is a indeed a sdev device.

Yinghai Lu <yhlu.kernel@gmail.com> found the bug on Jul 16, 2008,
and later tested/verified the following fix.
Signed-off-by: default avatarChandra Seetharaman <sekharan@us.ibm.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent dc7c65db
......@@ -416,12 +416,17 @@ static int clariion_bus_notify(struct notifier_block *nb,
unsigned long action, void *data)
{
struct device *dev = data;
struct scsi_device *sdev = to_scsi_device(dev);
struct scsi_device *sdev;
struct scsi_dh_data *scsi_dh_data;
struct clariion_dh_data *h;
int i, found = 0;
unsigned long flags;
if (!scsi_is_sdev_device(dev))
return 0;
sdev = to_scsi_device(dev);
if (action == BUS_NOTIFY_ADD_DEVICE) {
for (i = 0; clariion_dev_list[i].vendor; i++) {
if (!strncmp(sdev->vendor, clariion_dev_list[i].vendor,
......
......@@ -131,11 +131,16 @@ static int hp_sw_bus_notify(struct notifier_block *nb,
unsigned long action, void *data)
{
struct device *dev = data;
struct scsi_device *sdev = to_scsi_device(dev);
struct scsi_device *sdev;
struct scsi_dh_data *scsi_dh_data;
int i, found = 0;
unsigned long flags;
if (!scsi_is_sdev_device(dev))
return 0;
sdev = to_scsi_device(dev);
if (action == BUS_NOTIFY_ADD_DEVICE) {
for (i = 0; hp_sw_dh_data_list[i].vendor; i++) {
if (!strncmp(sdev->vendor, hp_sw_dh_data_list[i].vendor,
......
......@@ -608,12 +608,17 @@ static int rdac_bus_notify(struct notifier_block *nb,
unsigned long action, void *data)
{
struct device *dev = data;
struct scsi_device *sdev = to_scsi_device(dev);
struct scsi_device *sdev;
struct scsi_dh_data *scsi_dh_data;
struct rdac_dh_data *h;
int i, found = 0;
unsigned long flags;
if (!scsi_is_sdev_device(dev))
return 0;
sdev = to_scsi_device(dev);
if (action == BUS_NOTIFY_ADD_DEVICE) {
for (i = 0; rdac_dev_list[i].vendor; i++) {
if (!strncmp(sdev->vendor, rdac_dev_list[i].vendor,
......
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