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authorEric Dumazet <edumazet@google.com>2015-10-09 15:42:21 -0700
committerDavid S. Miller <davem@davemloft.net>2015-10-12 19:45:48 -0700
commit5fcd2d8be43664f1b6a5add3d21a367411add9d4 (patch)
tree3cc46ec8ea75d7ddfed640d2be9b33f1aa80fce7 /drivers/net/tun.c
parentb7a4609591612119869f2498732da98e4f8d5f4d (diff)
tun: use sk_fullsock() before reading sk->sk_tsflags
timewait or request sockets are small and do not contain sk->sk_tsflags Without this fix, we might read garbage, and crash later in __skb_complete_tx_timestamp() -> sock_queue_err_skb() (These pseudo sockets do not have an error queue either) Fixes: ca6fb0651883 ("tcp: attach SYNACK messages to request sockets instead of listener") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Willem de Bruijn <willemb@google.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/tun.c')
-rw-r--r--drivers/net/tun.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 976aa9704297..b1878faea397 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -858,7 +858,7 @@ static netdev_tx_t tun_net_xmit(struct sk_buff *skb, struct net_device *dev)
if (unlikely(skb_orphan_frags(skb, GFP_ATOMIC)))
goto drop;
- if (skb->sk) {
+ if (skb->sk && sk_fullsock(skb->sk)) {
sock_tx_timestamp(skb->sk, &skb_shinfo(skb)->tx_flags);
sw_tx_timestamp(skb);
}