| commit | 975022310233fb0f0193873d79a7b8438070fa82 | |
| author | Eric Dumazet <edumazet@google.com> | |
| Wed, 11 Dec 2013 22:46:51 +0000 (11 14:46 -0800) | ||
| committer | David S. Miller <davem@davemloft.net> | |
| Thu, 12 Dec 2013 01:21:10 +0000 (11 20:21 -0500) | ||
| tree | 2658e9259ca6a53e07a25fe399a4f61d15093220 | treesnapshot (tar.gz zip) |
| parent | a1bf1750871a6f242b0fdb174cc55d2c57e7ed66 | commitdiff |
udp: ipv4: must add synchronization in udp_sk_rx_dst_set()
Unlike TCP, UDP input path does not hold the socket lock.
Before messing with sk->sk_rx_dst, we must use a spinlock, otherwise
multiple cpus could leak a refcount.
This patch also takes care of renewing a stale dst entry.
(When the sk->sk_rx_dst would not be used by IP early demux)
Fixes: 421b3885bf6d ("udp: ipv4: Add udp early demux")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Shawn Bohrer <sbohrer@rgmadvisors.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Unlike TCP, UDP input path does not hold the socket lock.
Before messing with sk->sk_rx_dst, we must use a spinlock, otherwise
multiple cpus could leak a refcount.
This patch also takes care of renewing a stale dst entry.
(When the sk->sk_rx_dst would not be used by IP early demux)
Fixes: 421b3885bf6d ("udp: ipv4: Add udp early demux")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Shawn Bohrer <sbohrer@rgmadvisors.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| net/ipv4/udp.c | diffblobblamehistory |