diff options
| author | Florian Westphal <fw@strlen.de> | 2016-05-10 23:17:59 +0200 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2016-08-22 22:38:02 +0100 |
| commit | fd966aaf45bba66a7b2b365550b44734d50e63cb (patch) | |
| tree | 48156019dc23828967cb11e9072a6ef832437aee /net/batman-adv | |
| parent | 188e5f79a281cfc1bd508e6fefded456bd8dce53 (diff) | |
batman-adv: fix skb deref after free
commit 63d443efe8be2c1d02b30d7e4edeb9aa085352b3 upstream.
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>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'net/batman-adv')
| -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 fb0c4e6069a7..51993a9f686c 100644 --- a/net/batman-adv/routing.c +++ b/net/batman-adv/routing.c @@ -568,6 +568,7 @@ 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; @@ -608,6 +609,7 @@ 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 */ @@ -615,7 +617,7 @@ 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) { |