From: Shin'ichiro Kawasaki <shinichiro.kawasaki@xxxxxxx> commit 7db0e0c8190a086ef92ce5bb960836cde49540aa upstream. According to ZBC and SPC specifications, the unit of ALLOCATION LENGTH field of REPORT ZONES command is byte. However, current scsi_debug implementation handles it as number of zones to calculate buffer size to report zones. When the ALLOCATION LENGTH has a large number, this results in too large buffer size and causes memory allocation failure. Fix the failure by handling ALLOCATION LENGTH as byte unit. Link: https://lore.kernel.org/r/20211207010638.124280-1-shinichiro.kawasaki@xxxxxxx Fixes: f0d1cf9378bd ("scsi: scsi_debug: Add ZBC zone commands") Reviewed-by: Damien Le Moal <damien.lemoal@xxxxxxxxxxxxxxxxxx> Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@xxxxxxx> Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/scsi/scsi_debug.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -4334,7 +4334,7 @@ static int resp_report_zones(struct scsi rep_max_zones = min((alloc_len - 64) >> ilog2(RZONES_DESC_HD), max_zones); - arr = kcalloc(RZONES_DESC_HD, alloc_len, GFP_ATOMIC); + arr = kzalloc(alloc_len, GFP_ATOMIC); if (!arr) { mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, INSUFF_RES_ASCQ);
