From: Harshit Mogalapalli harshit.m.mogalapalli@oracle.com
[ 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@oracle.com Link: https://lore.kernel.org/r/20221112070031.2121068-1-harshit.m.mogalapalli@ora... Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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);