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hpsa: guard against overflowing raid map array

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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 <scott.teel@pmcs.com>
Signed-off-by: Don Brace <don.brace@pmcs.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Stephen Cameron 2015-01-23 16:44:14 -06:00 committed by James Bottomley
parent e4aa3e6ae2
commit 07543e0c05
1 changed files with 3 additions and 0 deletions
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3
drivers/scsi/hpsa.c
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@ -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;