kernel_optimize_test/drivers/vhost
Yunjian Wang 0ad31889c4 vhost_net: fix ubuf refcount incorrectly when sendmsg fails
[ Upstream commit 01e31bea7e622f1890c274f4aaaaf8bccd296aa5 ]

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 20:18:13 +01:00
..
iotlb.c vhost: Fix documentation 2020-09-24 05:54:36 -04:00
Kconfig vhost_vdpa: implement IRQ offloading in vhost_vdpa 2020-08-05 11:08:42 -04:00
Makefile
net.c vhost_net: fix ubuf refcount incorrectly when sendmsg fails 2021-01-12 20:18:13 +01:00
scsi.c vhost scsi: fix error return code in vhost_scsi_set_endpoint() 2020-12-30 11:54:00 +01:00
test.c tools/virtio: Add --reset 2020-06-22 12:34:21 -04:00
test.h tools/virtio: Add --reset 2020-06-22 12:34:21 -04:00
vdpa.c vhost_vdpa: return -EFAULT if copy_to_user() fails 2020-12-02 04:36:40 -05:00
vhost.c vhost: add helper to check if a vq has been setup 2020-11-15 17:30:54 -05:00
vhost.h vhost: add helper to check if a vq has been setup 2020-11-15 17:30:54 -05:00
vringh.c vringh: fix vringh_iov_push_*() documentation 2020-11-25 04:22:48 -05:00
vsock.c