diff options
author | Tony Lu <tonylu@linux.alibaba.com> | 2022-04-14 15:51:03 +0800 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-27 13:53:49 +0200 |
commit | a499cb5f3ef9f976eac96c02adbcc505764e2b91 (patch) | |
tree | c69ff7ad2c330f4c81eb525d916abfaa0b13edf1 /net | |
parent | 60592f16a456d239df9060968dd9cb561d0a6fb0 (diff) |
net/smc: Fix sock leak when release after smc_shutdown()
[ Upstream commit 1a74e99323746353bba11562a2f2d0aa8102f402 ]
Since commit e5d5aadcf3cd ("net/smc: fix sk_refcnt underflow on linkdown
and fallback"), for a fallback connection, __smc_release() does not call
sock_put() if its state is already SMC_CLOSED.
When calling smc_shutdown() after falling back, its state is set to
SMC_CLOSED but does not call sock_put(), so this patch calls it.
Reported-and-tested-by: syzbot+6e29a053eb165bd50de5@syzkaller.appspotmail.com
Fixes: e5d5aadcf3cd ("net/smc: fix sk_refcnt underflow on linkdown and fallback")
Signed-off-by: Tony Lu <tonylu@linux.alibaba.com>
Acked-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net')
-rw-r--r-- | net/smc/af_smc.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c index 4f16d406ad8e..1b98f3241150 100644 --- a/net/smc/af_smc.c +++ b/net/smc/af_smc.c @@ -2144,8 +2144,10 @@ static int smc_shutdown(struct socket *sock, int how) if (smc->use_fallback) { rc = kernel_sock_shutdown(smc->clcsock, how); sk->sk_shutdown = smc->clcsock->sk->sk_shutdown; - if (sk->sk_shutdown == SHUTDOWN_MASK) + if (sk->sk_shutdown == SHUTDOWN_MASK) { sk->sk_state = SMC_CLOSED; + sock_put(sk); + } goto out; } switch (how) { |