From 07543e0c05de177f2e9612ae7756e904b329379c Mon Sep 17 00:00:00 2001 From: Stephen Cameron Date: Fri, 23 Jan 2015 16:44:14 -0600 Subject: [PATCH] hpsa: guard against overflowing raid map array In the code that translates logical drive LBAs to physical drive LBAs if we overflow the raid map disk data array we will get the wrong answers. We do not expect that to happen, but best to be on the safe side and guard against it anyway. Reviewed-by: Scott Teel Signed-off-by: Don Brace Signed-off-by: Christoph Hellwig --- drivers/scsi/hpsa.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index afd192d2d27d..03fae8af23ec 100644 --- a/drivers/scsi/hpsa.c +++ b/drivers/scsi/hpsa.c @@ -3921,6 +3921,9 @@ static int hpsa_scsi_ioaccel_raid_map(struct ctlr_info *h, return IO_ACCEL_INELIGIBLE; } + if (unlikely(map_index >= RAID_MAP_MAX_ENTRIES)) + return IO_ACCEL_INELIGIBLE; + c->phys_disk = dev->phys_disk[map_index]; disk_handle = dd[map_index].ioaccel_handle;