[PATCH 3.2 48/52] irda: precedence bug in irlmp_seq_hb_idx()

[Ben Hutchings]

3.2.74-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

[ Upstream commit 50010c20597d14667eff0fdb628309986f195230 ]

This is decrementing the pointer, instead of the value stored in the
pointer.  KASan detects it as an out of bounds reference.

Reported-by: "BerryÂCheng çå(ææ)" <chengmiao.cj@xxxxxxxxxxxxxxx>
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
 net/irda/irlmp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/irda/irlmp.c
+++ b/net/irda/irlmp.c
@@ -1868,7 +1868,7 @@ static void *irlmp_seq_hb_idx(struct irl
 	for (element = hashbin_get_first(iter->hashbin);
 	     element != NULL;
 	     element = hashbin_get_next(iter->hashbin)) {
-		if (!off || *off-- == 0) {
+		if (!off || (*off)-- == 0) {
 			/* NB: hashbin left locked */
 			return element;
 		}

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/