korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-17 09:14:19 +08:00
Code Issues Packages Projects Releases Wiki Activity

net/smc: Fix NULL pointer dereference in smc_pnet_find_ib()

Browse Source 
[ Upstream commit d22f4f9772 ]

dev_name() was called with dev.parent as argument but without to
NULL-check it before.
Solve this by checking the pointer before the call to dev_name().

Fixes: af5f60c7e3 ("net/smc: allow PCI IDs as ib device names in the pnet table")
Reported-by: syzbot+03e3e228510223dabd34@syzkaller.appspotmail.com
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Karsten Graul 2022-04-08 17:10:34 +02:00 committed by Greg Kroah-Hartman
parent 66b3107a4a
commit 3a523807f0
1 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
net/smc/smc_pnet.c
View File

@ -310,8 +310,9 @@ static struct smc_ib_device *smc_pnet_find_ib(char *ib_name)
list_for_each_entry(ibdev, &smc_ib_devices.list, list) {
if (!strncmp(ibdev->ibdev->name, ib_name,
sizeof(ibdev->ibdev->name)) ||
!strncmp(dev_name(ibdev->ibdev->dev.parent), ib_name,
IB_DEVICE_NAME_MAX - 1)) {
(ibdev->ibdev->dev.parent &&
!strncmp(dev_name(ibdev->ibdev->dev.parent), ib_name,
IB_DEVICE_NAME_MAX - 1))) {
goto out;
}
}