linux/drivers/vhost
Yunjian Wang cf7dd7f3be vhost_net: fix ubuf refcount incorrectly when sendmsg fails
[ Upstream commit 01e31bea7e ]

Currently the vhost_zerocopy_callback() maybe be called to decrease
the refcount when sendmsg fails in tun. The error handling in vhost
handle_tx_zerocopy() will try to decrease the same refcount again.
This is wrong. To fix this issue, we only call vhost_net_ubuf_put()
when vq->heads[nvq->desc].len == VHOST_DMA_IN_PROGRESS.

Fixes: bab632d69e ("vhost: vhost TX zero-copy support")
Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/1609207308-20544-1-git-send-email-wangyunjian@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-01-12 20:10:19 +01:00
..
Kconfig vhost: allow vhost-scsi driver to be built-in 2018-08-22 01:01:32 +03:00
Kconfig.vringh
Makefile
net.c vhost_net: fix ubuf refcount incorrectly when sendmsg fails 2021-01-12 20:10:19 +01:00
scsi.c vhost: scsi: add weight support 2019-08-04 09:30:55 +02:00
test.c vhost/test: stop device before reset 2020-01-27 14:51:19 +01:00
test.h
vhost.c vhost: make sure log_num < in_num 2019-09-16 08:22:25 +02:00
vhost.h vhost: introduce vhost_exceeds_weight() 2019-08-04 09:30:55 +02:00
vringh.c vringh: fix __vringh_iov() when riov and wiov are different 2020-11-05 11:08:53 +01:00
vsock.c vsock/virtio: add transport parameter to the virtio_transport_reset_no_sock() 2020-10-07 08:00:05 +02:00