Messages in this thread Patch in this message | | | Date | Tue, 15 Jul 2008 17:18:38 -0400 (EDT) | From | Mikulas Patocka <> | Subject | [PATCH 3/4] BUG_ON on kernel misbehavior on A100U2W driver |
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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> --- drivers/scsi/a100u2w.c | 1 + 1 file changed, 1 insertion(+)
Index: linux-2.6.26-devel/drivers/scsi/a100u2w.c =================================================================== --- linux-2.6.26-devel.orig/drivers/scsi/a100u2w.c 2008-07-14 20:03:43.000000000 +0200 +++ linux-2.6.26-devel/drivers/scsi/a100u2w.c 2008-07-15 00:46:02.000000000 +0200 @@ -866,6 +866,7 @@ static void inia100_build_scb(struct orc 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) {
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