BUG_ON on kernel misbehavior on A100U2W driver
With broken Sparc64 IOMMU accounting, the kernel submits larger requests
then allowed. Better to crash on BUG than corrupt memory.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Acked-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/scsi/a100u2w.c b/drivers/scsi/a100u2w.c
index 1e8bdd4..f5051f4 100644
--- a/drivers/scsi/a100u2w.c
+++ b/drivers/scsi/a100u2w.c
@@ -866,6 +866,7 @@
count_sg = scsi_dma_map(cmd);
BUG_ON(count_sg < 0);
+ BUG_ON(count_sg > TOTAL_SG_ENTRY);
/* Build the scatter gather lists */
if (count_sg) {