Commit 07543e0c authored by Stephen Cameron's avatar Stephen Cameron Committed by James Bottomley

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: default avatarScott Teel <scott.teel@pmcs.com>
Signed-off-by: default avatarDon Brace <don.brace@pmcs.com>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent e4aa3e6a
...@@ -3921,6 +3921,9 @@ static int hpsa_scsi_ioaccel_raid_map(struct ctlr_info *h, ...@@ -3921,6 +3921,9 @@ static int hpsa_scsi_ioaccel_raid_map(struct ctlr_info *h,
return IO_ACCEL_INELIGIBLE; return IO_ACCEL_INELIGIBLE;
} }
if (unlikely(map_index >= RAID_MAP_MAX_ENTRIES))
return IO_ACCEL_INELIGIBLE;
c->phys_disk = dev->phys_disk[map_index]; c->phys_disk = dev->phys_disk[map_index];
disk_handle = dd[map_index].ioaccel_handle; disk_handle = dd[map_index].ioaccel_handle;
......
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