net/x25: Fix to not accept on connected socket

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[ Upstream commit f2b0b5210f ]

When listen() and accept() are called on an x25 socket
that connect() succeeds, accept() succeeds immediately.
This is because x25_connect() queues the skb to
sk->sk_receive_queue, and x25_accept() dequeues it.

This creates a child socket with the sk of the parent
x25 socket, which can cause confusion.

Fix x25_listen() to return -EINVAL if the socket has
already been successfully connect()ed to avoid this issue.

Signed-off-by: Hyunwoo Kim <v4bel@theori.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Hyunwoo Kim 2023-01-23 11:43:23 -08:00 • committed by Greg Kroah-Hartman

parent 72e5a83b7c

commit 22312eeab3

1 changed files with 6 additions and 0 deletions

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net/x25/af_x25.c

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