diff options
| author | Florian Westphal <fw@strlen.de> | 2016-05-10 23:17:59 +0200 |
|---|---|---|
| committer | Antonio Quartulli <a@unstable.cc> | 2016-05-18 11:49:38 +0800 |
| commit | 63d443efe8be2c1d02b30d7e4edeb9aa085352b3 (patch) | |
| tree | 2d50b3ba410917d098c4ff4fb87aa78f09626448 /net/batman-adv/routing.c | |
| parent | 917fa5353da05e8a0045b8acacba8d50400d5b12 (diff) | |
| download | op-kernel-dev-63d443efe8be2c1d02b30d7e4edeb9aa085352b3.zip op-kernel-dev-63d443efe8be2c1d02b30d7e4edeb9aa085352b3.tar.gz | |
batman-adv: fix skb deref after free
batadv_send_skb_to_orig() calls dev_queue_xmit() so we can't use skb->len.
Fixes: 953324776d6d ("batman-adv: network coding - buffer unicast packets before forward")
Signed-off-by: Florian Westphal <fw@strlen.de>
Reviewed-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
Diffstat (limited to 'net/batman-adv/routing.c')
| -rw-r--r-- | net/batman-adv/routing.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c index ae850f2..e3857ed 100644 --- a/net/batman-adv/routing.c +++ b/net/batman-adv/routing.c @@ -601,6 +601,7 @@ static int batadv_route_unicast_packet(struct sk_buff *skb, struct batadv_unicast_packet *unicast_packet; struct ethhdr *ethhdr = eth_hdr(skb); int res, hdr_len, ret = NET_RX_DROP; + unsigned int len; unicast_packet = (struct batadv_unicast_packet *)skb->data; @@ -641,6 +642,7 @@ static int batadv_route_unicast_packet(struct sk_buff *skb, if (hdr_len > 0) batadv_skb_set_priority(skb, hdr_len); + len = skb->len; res = batadv_send_skb_to_orig(skb, orig_node, recv_if); /* translate transmit result into receive result */ @@ -648,7 +650,7 @@ static int batadv_route_unicast_packet(struct sk_buff *skb, /* skb was transmitted and consumed */ batadv_inc_counter(bat_priv, BATADV_CNT_FORWARD); batadv_add_counter(bat_priv, BATADV_CNT_FORWARD_BYTES, - skb->len + ETH_HLEN); + len + ETH_HLEN); ret = NET_RX_SUCCESS; } else if (res == NET_XMIT_POLICED) { |
