irda: precedence bug in irlmp_seq_hb_idx()

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

Reported-by: "Berry Cheng 程君(成淼)" <chengmiao.cj@alibaba-inc.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/irda/irlmp.c b/net/irda/irlmp.c
index a26c401ef4a4..43964594aa12 100644
--- a/net/irda/irlmp.c
+++ b/net/irda/irlmp.c
@@ -1839,7 +1839,7 @@ static void *irlmp_seq_hb_idx(struct irlmp_iter_state *iter, loff_t *off)
         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;
                 }