From: Harshit Mogalapalli <harshit.m.mogalapalli@xxxxxxxxxx>
[ 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>
---
drivers/scsi/scsi_debug.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 110d0e7f9413..cdbcb5eaf279 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -4275,7 +4275,7 @@ 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);
--
2.35.1
