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| author | Cong Wang <xiyou.wangcong@gmail.com> | 2018-12-10 11:49:55 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-12-14 13:16:33 -0800 |
| commit | 15ef70e286176165d28b0b8a969b422561a68dfc (patch) | |
| tree | ef79c96eb556365029d89323ab6b74b92495f12c /net/tipc | |
| parent | d3e8869ec82645599e6497d6974593bf00f7b19b (diff) | |
| download | linux-stable-15ef70e286176165d28b0b8a969b422561a68dfc.tar.gz linux-stable-15ef70e286176165d28b0b8a969b422561a68dfc.tar.bz2 linux-stable-15ef70e286176165d28b0b8a969b422561a68dfc.zip | |
tipc: use lock_sock() in tipc_sk_reinit()
lock_sock() must be used in process context to be race-free with
other lock_sock() callers, for example, tipc_release(). Otherwise
using the spinlock directly can't serialize a parallel tipc_release().
As it is blocking, we have to hold the sock refcnt before
rhashtable_walk_stop() and release it after rhashtable_walk_start().
Fixes: 07f6c4bc048a ("tipc: convert tipc reference table to use generic rhashtable")
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Ying Xue <ying.xue@windriver.com>
Cc: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tipc')
| -rw-r--r-- | net/tipc/socket.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/net/tipc/socket.c b/net/tipc/socket.c index b57b1be7252b..e1396fb87779 100644 --- a/net/tipc/socket.c +++ b/net/tipc/socket.c @@ -2724,11 +2724,15 @@ void tipc_sk_reinit(struct net *net) rhashtable_walk_start(&iter); while ((tsk = rhashtable_walk_next(&iter)) && !IS_ERR(tsk)) { - spin_lock_bh(&tsk->sk.sk_lock.slock); + sock_hold(&tsk->sk); + rhashtable_walk_stop(&iter); + lock_sock(&tsk->sk); msg = &tsk->phdr; msg_set_prevnode(msg, tipc_own_addr(net)); msg_set_orignode(msg, tipc_own_addr(net)); - spin_unlock_bh(&tsk->sk.sk_lock.slock); + release_sock(&tsk->sk); + rhashtable_walk_start(&iter); + sock_put(&tsk->sk); } rhashtable_walk_stop(&iter); |