diff options
| author | Eric Dumazet <edumazet@google.com> | 2019-10-09 14:51:20 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-27 14:51:18 +0100 |
| commit | b0fb910bfdf469fa5016e939c778cfb566be2e33 (patch) | |
| tree | 6d5e14ac2601d8a8c875d7a6b399a8fc7d4ef716 /drivers | |
| parent | 910699a81fe572b41cc23b46b0616ce7878f5237 (diff) | |
net: add {READ|WRITE}_ONCE() annotations on ->rskq_accept_head
[ Upstream commit 60b173ca3d1cd1782bd0096dc17298ec242f6fb1 ]
reqsk_queue_empty() is called from inet_csk_listen_poll() while
other cpus might write ->rskq_accept_head value.
Use {READ|WRITE}_ONCE() to avoid compiler tricks
and potential KCSAN splats.
Fixes: fff1f3001cc5 ("tcp: add a spinlock to protect struct request_sock_queue")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/xen/pvcalls-back.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/xen/pvcalls-back.c b/drivers/xen/pvcalls-back.c index d4ea33581ac2..b3fbfed28682 100644 --- a/drivers/xen/pvcalls-back.c +++ b/drivers/xen/pvcalls-back.c @@ -784,7 +784,7 @@ static int pvcalls_back_poll(struct xenbus_device *dev, mappass->reqcopy = *req; icsk = inet_csk(mappass->sock->sk); queue = &icsk->icsk_accept_queue; - data = queue->rskq_accept_head != NULL; + data = READ_ONCE(queue->rskq_accept_head) != NULL; if (data) { mappass->reqcopy.cmd = 0; ret = 0; |