Re: [syzbot] [net?] [s390?] possible deadlock in smc_release

[Jeongjun Park]

#syz test git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

---
 net/smc/af_smc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index c5f98c6b2561..e7ec066b0d6a 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -294,6 +294,8 @@ static int __smc_release(struct smc_sock *smc)
 
 	sk->sk_prot->unhash(sk);
 
+	barrier();
+
 	if (sk->sk_state == SMC_CLOSED) {
 		if (smc->clcsock) {
 			release_sock(sk);
--