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xen-devel
[Xen-devel] Re: [PATCH] xen/blkfront: beyond ARRAY_SIZE of info->shadow
Roel Kluin wrote:
Do not go beyond ARRAY_SIZE of info->shadow
Signed-off-by: Roel Kluin <roel.kluin@xxxxxxxxx>
Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
Jens, can you put this into a next-merge-window branch?
Thanks,
J
---
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index a6cbf7b..d395986 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -122,7 +122,7 @@ static DEFINE_SPINLOCK(blkif_io_lock);
static int get_id_from_freelist(struct blkfront_info *info)
{
unsigned long free = info->shadow_free;
- BUG_ON(free > BLK_RING_SIZE);
+ BUG_ON(free >= BLK_RING_SIZE);
info->shadow_free = info->shadow[free].req.id;
info->shadow[free].req.id = 0x0fffffee; /* debug */
return free;
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