| commit | 26d99834f89e76514076d9cd06f61e56e6a509b8 | |
| author | Greg Kurz <groug@kaod.org> | |
| Mon, 22 Jan 2018 21:02:05 +0000 (22 22:02 +0100) | ||
| committer | Michael S. Tsirkin <mst@redhat.com> | |
| Fri, 9 Feb 2018 18:08:19 +0000 (9 20:08 +0200) | ||
| tree | 0098d208ff8f3788c37cc4f25087fe5853e7c483 | treesnapshot (tar.gz zip) |
| parent | d25cc43c6775bff6b8e3dad97c747954b805e421 | commitdiff |
9p/trans_virtio: discard zero-length reply
When a 9p request is successfully flushed, the server is expected to just
mark it as used without sending a 9p reply (ie, without writing data into
the buffer). In this case, virtqueue_get_buf() will return len == 0 and
we must not report a REQ_STATUS_RCVD status to the client, otherwise the
client will erroneously assume the request has not been flushed.
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
When a 9p request is successfully flushed, the server is expected to just
mark it as used without sending a 9p reply (ie, without writing data into
the buffer). In this case, virtqueue_get_buf() will return len == 0 and
we must not report a REQ_STATUS_RCVD status to the client, otherwise the
client will erroneously assume the request has not been flushed.
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| net/9p/trans_virtio.c | diffblobblamehistory |