diff options
| author | Matthias Schiffer <mschiffer@universe-factory.net> | 2020-03-18 00:27:17 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-03-20 09:06:29 +0100 |
| commit | 38755adee8340be15abf3cf7cc343e9cf474f1d3 (patch) | |
| tree | 14d5df7f76f56d43d04330738fa9d6204eccb550 | |
| parent | 2e0c20148bf27d3f2a45ab5bb0f6b076d0c0f78d (diff) | |
batman-adv: update data pointers after skb_cow()
commit bc44b78157f621ff2a2618fe287a827bcb094ac4 upstream.
batadv_check_unicast_ttvn() calls skb_cow(), so pointers into the SKB data
must be (re)set after calling it. The ethhdr variable is dropped
altogether.
Fixes: 78fc6bbe0aca ("batman-adv: add UNICAST_4ADDR packet type")
Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/batman-adv/routing.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c index 6c3dfd65023f..b8ff2a17b7ef 100644 --- a/net/batman-adv/routing.c +++ b/net/batman-adv/routing.c @@ -904,7 +904,6 @@ int batadv_recv_unicast_packet(struct sk_buff *skb, bool is4addr; unicast_packet = (struct batadv_unicast_packet *)skb->data; - unicast_4addr_packet = (struct batadv_unicast_4addr_packet *)skb->data; is4addr = unicast_packet->packet_type == BATADV_UNICAST_4ADDR; /* the caller function should have already pulled 2 bytes */ @@ -925,9 +924,13 @@ int batadv_recv_unicast_packet(struct sk_buff *skb, if (!batadv_check_unicast_ttvn(bat_priv, skb, hdr_size)) return NET_RX_DROP; + unicast_packet = (struct batadv_unicast_packet *)skb->data; + /* packet for me */ if (batadv_is_my_mac(bat_priv, unicast_packet->dest)) { if (is4addr) { + unicast_4addr_packet = + (struct batadv_unicast_4addr_packet *)skb->data; subtype = unicast_4addr_packet->subtype; batadv_dat_inc_counter(bat_priv, subtype); |