From c7caf669b89d05bc86238cc6bc4add41311b16e8 Mon Sep 17 00:00:00 2001 From: Jeremy Kerr Date: Thu, 26 Jan 2023 14:45:51 +0800 Subject: [PATCH] net: mctp: purge receive queues on sk destruction commit 60bd1d9008a50cc78c4033a16a6f5d78210d481c upstream. We may have pending skbs in the receive queue when the sk is being destroyed; add a destructor to purge the queue. MCTP doesn't use the error queue, so only the receive_queue is purged. Fixes: 833ef3b91de6 ("mctp: Populate socket implementation") Signed-off-by: Jeremy Kerr Reviewed-by: Pavan Chebbi Link: https://lore.kernel.org/r/20230126064551.464468-1-jk@codeconstruct.com.au Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman --- net/mctp/af_mctp.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/net/mctp/af_mctp.c b/net/mctp/af_mctp.c index a77fafbc31cf..77137a8627d0 100644 --- a/net/mctp/af_mctp.c +++ b/net/mctp/af_mctp.c @@ -294,6 +294,11 @@ static void mctp_sk_unhash(struct sock *sk) synchronize_rcu(); } +static void mctp_sk_destruct(struct sock *sk) +{ + skb_queue_purge(&sk->sk_receive_queue); +} + static struct proto mctp_proto = { .name = "MCTP", .owner = THIS_MODULE, @@ -330,6 +335,7 @@ static int mctp_pf_create(struct net *net, struct socket *sock, return -ENOMEM; sock_init_data(sock, sk); + sk->sk_destruct = mctp_sk_destruct; rc = 0; if (sk->sk_prot->init)