mptcp: fix data race around msk->first access
authorPaolo Abeni <pabeni@redhat.com>
Wed, 31 May 2023 19:37:06 +0000 (12:37 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 9 Jun 2023 08:34:06 +0000 (10:34 +0200)
commit0b9e6d64cd10081a3b193ceb11d44d2de877f5ff
treeb6988b74f4a3c36f54dd4e8c106e56b6671a114f
parent519f16d96c2d49fde06aa2817898cc8d01fe4730
mptcp: fix data race around msk->first access

[ Upstream commit 1b1b43ee7a208096ecd79e626f2fc90d4a321111 ]

The first subflow socket is accessed outside the msk socket lock
by mptcp_subflow_fail(), we need to annotate each write access
with WRITE_ONCE, but a few spots still lacks it.

Fixes: 76a13b315709 ("mptcp: invoke MP_FAIL response when needed")
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
net/mptcp/protocol.c