Stefano Garzarella
2023-Jul-06 16:54 UTC
[RFC PATCH v5 06/17] vsock: fix EPOLLERR set on non-empty error queue
On Sat, Jul 01, 2023 at 09:39:36AM +0300, Arseniy Krasnov wrote:>If socket's error queue is not empty, EPOLLERR must be set. Otherwise, >reader of error queue won't detect data in it using EPOLLERR bit. >Currently for AF_VSOCK this is reproducible only with MSG_ZEROCOPY, as >this feature is the only user of an error queue of the socket. > >Fixes: d021c344051a ("VSOCK: Introduce VM Sockets")Sorry if I confused you, but if without MSG_ZEROCOPY this is not an issue, then we can remove the Fixes tag.>Signed-off-by: Arseniy Krasnov <AVKrasnov at sberdevices.ru> >--- > Changelog: > v4 -> v5: > * Change commit message as Fix patch. Also add details that this > problem could be reproduced only with MSG_ZEROCOPY transmission > mode. > > net/vmw_vsock/af_vsock.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > >diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c >index efb8a0937a13..45fd20c4ed50 100644 >--- a/net/vmw_vsock/af_vsock.c >+++ b/net/vmw_vsock/af_vsock.c >@@ -1030,7 +1030,7 @@ static __poll_t vsock_poll(struct file *file, struct socket *sock, > poll_wait(file, sk_sleep(sk), wait); > mask = 0; > >- if (sk->sk_err) >+ if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue)) > /* Signify that there has been an error on this socket. */ > mask |= EPOLLERR; > >-- >2.25.1 >