From 46c28dbd4c23c3f7fa37f5ea48772af79c9cc40e Mon Sep 17 00:00:00 2001 From: Ursula Braun Date: Mon, 10 Apr 2017 14:58:01 +0200 Subject: net/smc: no socket state changes in tasklet context Several state changes occur during SMC socket closing. Currently state changes triggered locally occur in process context with lock_sock() taken while state changes triggered by peer occur in tasklet context with bh_lock_sock() taken. bh_lock_sock() does not wait till a lock_sock(() task in process context is finished. This may lead to races in socket state transitions resulting in dangling SMC-sockets, or it may lead to duplicate SMC socket freeing. This patch introduces a closing worker to run all state changes under lock_sock(). Signed-off-by: Ursula Braun Reviewed-by: Thomas Richter Reported-by: Dave Jones Signed-off-by: David S. Miller --- net/smc/smc_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/smc/smc_core.c') diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c index 0eac633fb354..65020e93ff21 100644 --- a/net/smc/smc_core.c +++ b/net/smc/smc_core.c @@ -316,7 +316,7 @@ void smc_lgr_terminate(struct smc_link_group *lgr) smc = container_of(conn, struct smc_sock, conn); sock_hold(&smc->sk); __smc_lgr_unregister_conn(conn); - smc_close_active_abort(smc); + schedule_work(&conn->close_work); sock_put(&smc->sk); node = rb_first(&lgr->conns_all); } -- cgit v1.2.3