diff options
| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-05-29 11:20:48 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-05-29 11:20:48 +0400 |
| commit | 2903037400a26e7c0cc93ab75a7d62abfacdf485 (patch) | |
| tree | c29d8b3199d8fa52856e5edcd374411f962d7c11 /net/ipv6/udp.c | |
| parent | 7dfde179c38056b91d51e60f3d50902387f27c84 (diff) | |
| download | linux-2903037400a26e7c0cc93ab75a7d62abfacdf485.tar.xz | |
net: fix sk_forward_alloc corruptions
As David found out, sock_queue_err_skb() should be called with socket
lock hold, or we risk sk_forward_alloc corruption, since we use non
atomic operations to update this field.
This patch adds bh_lock_sock()/bh_unlock_sock() pair to three spots.
(BH already disabled)
1) skb_tstamp_tx()
2) Before calling ip_icmp_error(), in __udp4_lib_err()
3) Before calling ipv6_icmp_error(), in __udp6_lib_err()
Reported-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/udp.c')
| -rw-r--r-- | net/ipv6/udp.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c index 87be58673b55..3048f906c042 100644 --- a/net/ipv6/udp.c +++ b/net/ipv6/udp.c @@ -466,9 +466,11 @@ void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) goto out; - if (np->recverr) + if (np->recverr) { + bh_lock_sock(sk); ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); - + bh_unlock_sock(sk); + } sk->sk_err = err; sk->sk_error_report(sk); out: |