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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 <[email protected]>
Signed-off-by: Don Brace <[email protected]>
Signed-off-by: Christoph Hellwig <[email protected]>
This commit is contained in:
Stephen Cameron 2015-01-23 16:44:14 -06:00 • committed by James Bottomley
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;