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authorGlauber Costa <glommer@parallels.com>2012-01-06 00:16:39 +0400
committerDavid S. Miller <davem@davemloft.net>2012-01-07 22:16:34 +0400
commitf3f511e1ce6f1a6f0a5bb8320e9f802e76f6b999 (patch)
treebedb8b38bec1bdb3fa7159bc61822488984d3ce0 /net
parent356b95424cfb456e14a59eaa579422ce014c424b (diff)
downloadlinux-f3f511e1ce6f1a6f0a5bb8320e9f802e76f6b999.tar.xz
net: fix sock_clone reference mismatch with tcp memcontrol
Sockets can also be created through sock_clone. Because it copies all data in the sock structure, it also copies the memcg-related pointer, and all should be fine. However, since we now use reference counts in socket creation, we are left with some sockets that have no reference counts. It matters when we destroy them, since it leads to a mismatch. Signed-off-by: Glauber Costa <glommer@parallels.com> CC: David S. Miller <davem@davemloft.net> CC: Greg Thelen <gthelen@google.com> CC: Hiroyouki Kamezawa <kamezawa.hiroyu@jp.fujitsu.com> CC: Laurent Chavey <chavey@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/sock.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/core/sock.c b/net/core/sock.c
index 002939cfc069..e80b64fbd663 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1362,6 +1362,8 @@ struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority)
sk_set_socket(newsk, NULL);
newsk->sk_wq = NULL;
+ sk_update_clone(sk, newsk);
+
if (newsk->sk_prot->sockets_allocated)
sk_sockets_allocated_inc(newsk);