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authorHerbert Xu <herbert@gondor.apana.org.au>2006-10-03 14:35:49 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2006-10-04 00:31:00 -0700
commit1e0c14f49d6b393179f423abbac47f85618d3d46 (patch)
tree9d789c9e4988f96a2da35506f12aeeb5b945432d /net
parent132a55f3c5c0b1a364d32f65595ad8838c30a60e (diff)
[UDP]: Fix MSG_PROBE crash
UDP tracks corking status through the pending variable. The IP layer also tracks it through the socket write queue. It is possible for the two to get out of sync when MSG_PROBE is used. This patch changes UDP to check the write queue to ensure that the two stay in sync. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/udp.c2
-rw-r--r--net/ipv6/udp.c2
2 files changed, 4 insertions, 0 deletions
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 6d6142f9c478..865d75214a9a 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -675,6 +675,8 @@ do_append_data:
udp_flush_pending_frames(sk);
else if (!corkreq)
err = udp_push_pending_frames(sk, up);
+ else if (unlikely(skb_queue_empty(&sk->sk_write_queue)))
+ up->pending = 0;
release_sock(sk);
out:
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 552ec0f449af..e0c3934a7e4b 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -770,6 +770,8 @@ do_append_data:
udp_v6_flush_pending_frames(sk);
else if (!corkreq)
err = udp_v6_push_pending_frames(sk, up);
+ else if (unlikely(skb_queue_empty(&sk->sk_write_queue)))
+ up->pending = 0;
if (dst) {
if (connected) {