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net: smc: fix spurious error message from __sock_release() 

Commit 67f562e3e1 ("net/smc: transfer fasync_list in case of fallback")
leaves the socket's fasync list pointer within a container socket as well.
When the latter is destroyed, '__sock_release()' warns about its non-empty
fasync list, which is a dangling pointer to previously freed fasync list
of an underlying TCP socket. Fix this spurious warning by nullifying
fasync list of a container socket.

Fixes: 67f562e3e1 ("net/smc: transfer fasync_list in case of fallback")
Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dmitry Antipov 2024-02-12 17:34:02 +03:00 committed by David S. Miller
parent d9a31cdab7
commit 6cf9ff4633
1 changed files with 1 additions and 0 deletions
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net/smc/af_smc.c
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@ -924,6 +924,7 @@ static int smc_switch_to_fallback(struct smc_sock *smc, int reason_code)
smc->clcsock->file->private_data = smc->clcsock;
smc->clcsock->wq.fasync_list =
smc->sk.sk_socket->wq.fasync_list;
smc->sk.sk_socket->wq.fasync_list = NULL;
/* There might be some wait entries remaining
* in smc sk->sk_wq and they should be woken up