diff options
| author | Bjørn Mork <bjorn@mork.no> | 2010-05-06 07:44:34 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-05-07 08:49:59 +0400 |
| commit | ccc2d97cb7c798e785c9f198de243e2b59f7073b (patch) | |
| tree | c8752bd5a4fb051690ecaf9015fd0de2bb83560e /net/ipv4 | |
| parent | 80ea76bb2575c426154b8d61d324197ee3592baa (diff) | |
| download | linux-ccc2d97cb7c798e785c9f198de243e2b59f7073b.tar.xz | |
ipv4: udp: fix short packet and bad checksum logging
commit 2783ef23 moved the initialisation of saddr and daddr after
pskb_may_pull() to avoid a potential data corruption. Unfortunately
also placing it after the short packet and bad checksum error paths,
where these variables are used for logging. The result is bogus
output like
[92238.389505] UDP: short packet: From 2.0.0.0:65535 23715/178 to 0.0.0.0:65535
Moving the saddr and daddr initialisation above the error paths, while still
keeping it after the pskb_may_pull() to keep the fix from commit 2783ef23.
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Cc: stable@kernel.org
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/udp.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index 8fef859db35d..c36522a0f113 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -1527,6 +1527,9 @@ int __udp4_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, uh = udp_hdr(skb); ulen = ntohs(uh->len); + saddr = ip_hdr(skb)->saddr; + daddr = ip_hdr(skb)->daddr; + if (ulen > skb->len) goto short_packet; @@ -1540,9 +1543,6 @@ int __udp4_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, if (udp4_csum_init(skb, uh, proto)) goto csum_error; - saddr = ip_hdr(skb)->saddr; - daddr = ip_hdr(skb)->daddr; - if (rt->rt_flags & (RTCF_BROADCAST|RTCF_MULTICAST)) return __udp4_lib_mcast_deliver(net, skb, uh, saddr, daddr, udptable); |