diff options
| author | Eric Dumazet <eric.dumazet@gmail.com> | 2012-01-23 05:38:59 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-02-03 09:22:19 -0800 |
| commit | 54652156e50409654d6d56bee221a3ad34dc0be9 (patch) | |
| tree | e7d3a3d0e8c74192cb20eed4b77322f8e1663128 | |
| parent | 7596e3d4d2cc1863a4f9d8c084556a63c2a5f62d (diff) | |
macvlan: fix a possible use after free
[ Upstream commit 4ec7ac1203bcf21f5e3d977c9818b1a56c9ef40d ]
Commit bc416d9768 (macvlan: handle fragmented multicast frames) added a
possible use after free in macvlan_handle_frame(), since
ip_check_defrag() uses pskb_may_pull() : skb header can be reallocated.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Ben Greear <greearb@candelatech.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/macvlan.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c index 74134970b70..959d4480a65 100644 --- a/drivers/net/macvlan.c +++ b/drivers/net/macvlan.c @@ -172,6 +172,7 @@ static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb) skb = ip_check_defrag(skb, IP_DEFRAG_MACVLAN); if (!skb) return RX_HANDLER_CONSUMED; + eth = eth_hdr(skb); src = macvlan_hash_lookup(port, eth->h_source); if (!src) /* frame comes from an external address */ |