1 files changed, 14 insertions, 6 deletions

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 404c9735aee9..8167aecc1594 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -704,6 +704,10 @@ static void prb_retire_rx_blk_timer_expired(unsigned long data)
 
         if (pkc->last_kactive_blk_num == pkc->kactive_blk_num) {
                 if (!frozen) {
+                        if (!BLOCK_NUM_PKTS(pbd)) {
+                                /* An empty block. Just refresh the timer. */
+                                goto refresh_timer;
+                        }
                         prb_retire_current_block(pkc, po, TP_STATUS_BLK_TMO);
                         if (!prb_dispatch_next_block(pkc, po))
                                 goto refresh_timer;
@@ -804,7 +808,11 @@ static void prb_close_block(struct tpacket_kbdq_core *pkc1,
                 h1->ts_last_pkt.ts_sec = last_pkt->tp_sec;
                 h1->ts_last_pkt.ts_nsec = last_pkt->tp_nsec;
         } else {
-                /* Ok, we tmo'd - so get the current time */
+                /* Ok, we tmo'd - so get the current time.
+                 *
+                 * It shouldn't really happen as we don't close empty
+                 * blocks. See prb_retire_rx_blk_timer_expired().
+                 */
                 struct timespec ts;
                 getnstimeofday(&ts);
                 h1->ts_last_pkt.ts_sec = ts.tv_sec;
@@ -1355,14 +1363,14 @@ static int packet_rcv_fanout(struct sk_buff *skb, struct net_device *dev,
                 return 0;
         }
 
+        if (fanout_has_flag(f, PACKET_FANOUT_FLAG_DEFRAG)) {
+                skb = ip_check_defrag(skb, IP_DEFRAG_AF_PACKET);
+                if (!skb)
+                        return 0;
+        }
         switch (f->type) {
         case PACKET_FANOUT_HASH:
         default:
-                if (fanout_has_flag(f, PACKET_FANOUT_FLAG_DEFRAG)) {
-                        skb = ip_check_defrag(skb, IP_DEFRAG_AF_PACKET);
-                        if (!skb)
-                                return 0;
-                }
                 idx = fanout_demux_hash(f, skb, num);
                 break;
         case PACKET_FANOUT_LB: