lisa/android_kernel_xiaomi_sm8350
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

scsi: snic: Fix possible UAF in snic_tgt_create()

Browse Source 
[ Upstream commit e118df492320176af94deec000ae034cc92be754 ]

Smatch reports a warning as follows:

drivers/scsi/snic/snic_disc.c:307 snic_tgt_create() warn:
  '&tgt->list' not removed from list

If device_add() fails in snic_tgt_create(), tgt will be freed, but
tgt->list will not be removed from snic->disc.tgt_list, then list traversal
may cause UAF.

Remove from snic->disc.tgt_list before free().

Fixes: c8806b6c9e ("snic: driver for Cisco SCSI HBA")
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Link: https://lore.kernel.org/r/20221117035100.2944812-1-cuigaosheng1@huawei.com
Acked-by: Narsimhulu Musini <nmusini@cisco.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Gaosheng Cui 2022-11-17 11:51:00 +08:00 committed by Greg Kroah-Hartman
parent be5f1a82ad
commit 6866154c23
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/scsi/snic/snic_disc.c
View File

@ -318,6 +318,9 @@ snic_tgt_create(struct snic *snic, struct snic_tgt_id *tgtid)
ret); ret);
put_device(&snic->shost->shost_gendev); put_device(&snic->shost->shost_gendev);
spin_lock_irqsave(snic->shost->host_lock, flags);
list_del(&tgt->list);
spin_unlock_irqrestore(snic->shost->host_lock, flags);
kfree(tgt); kfree(tgt);
tgt = NULL; tgt = NULL;