Commit 07543e0c authored Jan 23, 2015 by Stephen Cameron Committed by James Bottomley Feb 02, 2015

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 <scott.teel@pmcs.com>
Signed-off-by: Don Brace <don.brace@pmcs.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

parent e4aa3e6a

drivers/scsi/hpsa.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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;