path: root/net/irda/irlmp.c
diff options
authorDan Carpenter <dan.carpenter@oracle.com>2013-04-16 21:10:38 +0000
committerDavid S. Miller <davem@davemloft.net>2013-04-19 17:32:31 -0400
commite15465e1808542743627f13d1c0cbb7eacc82b83 (patch)
tree498799f640d53224044d5cdcb0463a162d7744a2 /net/irda/irlmp.c
parentfd7fc253289c419615c1c8bbe418598019567392 (diff)
irda: small read past the end of array in debug code
The "reason" can come from skb->data[] and it hasn't been capped so it can be from 0-255 instead of just 0-6. For example in irlmp_state_dtr() the code does: reason = skb->data[3]; ... irlmp_disconnect_indication(self, reason, skb); Also LMREASON has a couple other values which don't have entries in the irlmp_reasons[] array. And 0xff is a valid reason as well which means "unknown". So far as I can see we don't actually care about "reason" except for in the debug code. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/irda/irlmp.c')
1 files changed, 9 insertions, 1 deletions
diff --git a/net/irda/irlmp.c b/net/irda/irlmp.c
index 6115a44c0a2..1064621da6f 100644
--- a/net/irda/irlmp.c
+++ b/net/irda/irlmp.c
@@ -66,8 +66,15 @@ const char *irlmp_reasons[] = {
+const char *irlmp_reason_str(LM_REASON reason)
+ reason = min_t(size_t, reason, ARRAY_SIZE(irlmp_reasons) - 1);
+ return irlmp_reasons[reason];
* Function irlmp_init (void)
@@ -747,7 +754,8 @@ void irlmp_disconnect_indication(struct lsap_cb *self, LM_REASON reason,
struct lsap_cb *lsap;
- IRDA_DEBUG(1, "%s(), reason=%s\n", __func__, irlmp_reasons[reason]);
+ IRDA_DEBUG(1, "%s(), reason=%s [%d]\n", __func__,
+ irlmp_reason_str(reason), reason);
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);