[PATCH 5.10 078/154] sock: fix /proc/net/sockstat underflow in sk_clone_lock()
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2021-11-24 13:38:40
Also in:
lkml
Subsystem:
networking [general], networking [sockets], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Kuniyuki Iwashima, Willem de Bruijn, Linus Torvalds
From: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
[ Upstream commit 938cca9e4109b30ee1d476904538225a825e54eb ]
sk_clone_lock() needs to call sock_inuse_add(1) before entering the
sk_free_unlock_clone() error path, for __sk_free() from sk_free() from
sk_free_unlock_clone() calls sock_inuse_add(-1).
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Fixes: 648845ab7e200993 ("sock: Move the socket inuse to namespace.")
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/core/sock.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/net/core/sock.c b/net/core/sock.c
index 3da4cd632ba8e..6d9af4ef93d7a 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c@@ -1896,8 +1896,10 @@ struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority) newsk->sk_prot_creator = prot; /* SANITY */ - if (likely(newsk->sk_net_refcnt)) + if (likely(newsk->sk_net_refcnt)) { get_net(sock_net(newsk)); + sock_inuse_add(sock_net(newsk), 1); + } sk_node_init(&newsk->sk_node); sock_lock_init(newsk); bh_lock_sock(newsk);
@@ -1968,8 +1970,6 @@ struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority) newsk->sk_err_soft = 0; newsk->sk_priority = 0; newsk->sk_incoming_cpu = raw_smp_processor_id(); - if (likely(newsk->sk_net_refcnt)) - sock_inuse_add(sock_net(newsk), 1); /* Before updating sk_refcnt, we must commit prior changes to memory * (Documentation/RCU/rculist_nulls.rst for details)
--
2.33.0