From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9C778178CCD; Wed, 3 Jul 2024 10:49:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720003767; cv=none; b=EpfY1zHe+KtfF7BAvHcEclMj/41gsGYy3kNq3Q1hS+nkf7jgBXluOQO5uE6ESRwEHuISEkfjDtAqInyy4LTi7JDxS2uO1hCp2mg8JLCWx3FBbiZ+lskPt67HkCnny6DMHVVgHxHyu1ooVzC33B1w6nZT+jJgNpyL78XskqewiFU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720003767; c=relaxed/simple; bh=D5FIhWTdfYtd4XF6XYCuVHz1tOmSqKXdrkC91DPQGkA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=I7v+3cSwBbpmS/58gQGLMZa3vqFaZa1TlOcNWlpXcimOORwCOTG7mfQFOBGOjYLoL8ke8iOoz+E82fyZKdwwl2KkHF3leKByYU7sngbd3iRNG20EFfas5OVN2YgYVmb+fojPPR/3rIDJL9/0aMzEDMpARmPKnrMVmjyMjE78Ipo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=KMFHnf7l; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="KMFHnf7l" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1C53BC2BD10; Wed, 3 Jul 2024 10:49:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1720003767; bh=D5FIhWTdfYtd4XF6XYCuVHz1tOmSqKXdrkC91DPQGkA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KMFHnf7ltju023yfK2LU9lOUuN1hlxkYHMxTGrjZlrmSdmCQyj1VHrX/+N+5aULAt t3P/llIfq1iGvkAFXocXEkIQgVABF/p/wl3eyMq9Aqc76EnCRBR3sr2Y99jej3109p Xnr85sqcNZmJydh0mDz0ajgxOvR4K8QLoaNDB054= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Kuniyuki Iwashima , Paolo Abeni , Sasha Levin Subject: [PATCH 5.4 016/189] af_unix: Annotate data-races around sk->sk_state in sendmsg() and recvmsg(). Date: Wed, 3 Jul 2024 12:37:57 +0200 Message-ID: <20240703102842.116905355@linuxfoundation.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240703102841.492044697@linuxfoundation.org> References: <20240703102841.492044697@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Kuniyuki Iwashima [ Upstream commit 8a34d4e8d9742a24f74998f45a6a98edd923319b ] The following functions read sk->sk_state locklessly and proceed only if the state is TCP_ESTABLISHED. * unix_stream_sendmsg * unix_stream_read_generic * unix_seqpacket_sendmsg * unix_seqpacket_recvmsg Let's use READ_ONCE() there. Fixes: a05d2ad1c1f3 ("af_unix: Only allow recv on connected seqpacket sockets.") Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Kuniyuki Iwashima Signed-off-by: Paolo Abeni Signed-off-by: Sasha Levin --- net/unix/af_unix.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c index 73cc992bed880..0611ff921421e 100644 --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -1881,7 +1881,7 @@ static int unix_stream_sendmsg(struct socket *sock, struct msghdr *msg, goto out_err; if (msg->msg_namelen) { - err = sk->sk_state == TCP_ESTABLISHED ? -EISCONN : -EOPNOTSUPP; + err = READ_ONCE(sk->sk_state) == TCP_ESTABLISHED ? -EISCONN : -EOPNOTSUPP; goto out_err; } else { err = -ENOTCONN; @@ -2083,7 +2083,7 @@ static int unix_seqpacket_sendmsg(struct socket *sock, struct msghdr *msg, if (err) return err; - if (sk->sk_state != TCP_ESTABLISHED) + if (READ_ONCE(sk->sk_state) != TCP_ESTABLISHED) return -ENOTCONN; if (msg->msg_namelen) @@ -2097,7 +2097,7 @@ static int unix_seqpacket_recvmsg(struct socket *sock, struct msghdr *msg, { struct sock *sk = sock->sk; - if (sk->sk_state != TCP_ESTABLISHED) + if (READ_ONCE(sk->sk_state) != TCP_ESTABLISHED) return -ENOTCONN; return unix_dgram_recvmsg(sock, msg, size, flags); @@ -2293,7 +2293,7 @@ static int unix_stream_read_generic(struct unix_stream_read_state *state, size_t size = state->size; unsigned int last_len; - if (unlikely(sk->sk_state != TCP_ESTABLISHED)) { + if (unlikely(READ_ONCE(sk->sk_state) != TCP_ESTABLISHED)) { err = -EINVAL; goto out; } -- 2.43.0