This is a note to let you know that I've just added the patch titled scsi: scsi_debug: Fix a warning in resp_verify() to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: scsi-scsi_debug-fix-a-warning-in-resp_verify.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 36774be9888c2a3789464ab08fdc0561226de143 Author: Harshit Mogalapalli <harshit.m.mogalapalli@xxxxxxxxxx> Date: Fri Nov 11 23:00:31 2022 -0800 scsi: scsi_debug: Fix a warning in resp_verify() [ Upstream commit ed0f17b748b20271cb568c7ca0b23b120316a47d ] As 'vnum' is controlled by user, so if user tries to allocate memory larger than(>=) MAX_ORDER, then kcalloc() will fail, it creates a stack trace and messes up dmesg with a warning. Add __GFP_NOWARN in order to avoid too large allocation warning. This is detected by static analysis using smatch. Fixes: c3e2fe9222d4 ("scsi: scsi_debug: Implement VERIFY(10), add VERIFY(16)") Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@xxxxxxxxxx> Link: https://lore.kernel.org/r/20221112070031.2121068-1-harshit.m.mogalapalli@xxxxxxxxxx Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index b44fd9b80934..6ca3205a0bf5 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -4296,7 +4296,7 @@ static int resp_verify(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) if (ret) return ret; - arr = kcalloc(lb_size, vnum, GFP_ATOMIC); + arr = kcalloc(lb_size, vnum, GFP_ATOMIC | __GFP_NOWARN); if (!arr) { mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, INSUFF_RES_ASCQ);