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scsi: scsi_debug: Fix a warning in resp_report_zones() 

As 'alloc_len' is user controlled data, 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: 7db0e0c819 ("scsi: scsi_debug: Fix buffer size of REPORT ZONES command")
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
Link: https://lore.kernel.org/r/20221112070612.2121535-1-harshit.m.mogalapalli@oracle.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Harshit Mogalapalli 2022-11-11 23:06:12 -08:00 committed by Martin K. Petersen
parent ed0f17b748
commit 07f2ca139d
1 changed files with 1 additions and 1 deletions
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2
drivers/scsi/scsi_debug.c
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@ -4497,7 +4497,7 @@ static int resp_report_zones(struct scsi_cmnd *scp,
rep_max_zones = (alloc_len - 64) >> ilog2(RZONES_DESC_HD);
arr = kzalloc(alloc_len, GFP_ATOMIC);
arr = kzalloc(alloc_len, GFP_ATOMIC | __GFP_NOWARN);
if (!arr) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
INSUFF_RES_ASCQ);