diff options
| author | Michael S. Tsirkin <mst@redhat.com> | 2022-01-06 07:57:46 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-01-27 12:02:58 +0100 |
| commit | 45a05e32d6eca1bd65ab93a63f324fd556937ea4 (patch) | |
| tree | 054bcbee763f21977797c7b450f6a1e3dd4d4694 /drivers/virtio | |
| parent | bd33ff5842c63ebb831b4fdc18d61c1805329f00 (diff) | |
virtio_ring: mark ring unused on error
commit 1861ba626ae9b98136f3e504208cdef6b29cd3ec upstream.
A recently added error path does not mark ring unused when exiting on
OOM, which will lead to BUG on the next entry in debug builds.
TODO: refactor code so we have START_USE and END_USE in the same function.
Fixes: fc6d70f40b3d ("virtio_ring: check desc == NULL when using indirect with packed")
Cc: "Xuan Zhuo" <xuanzhuo@linux.alibaba.com>
Cc: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Reviewed-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/virtio')
| -rw-r--r-- | drivers/virtio/virtio_ring.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 028b05d44546..962f1477b1fa 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -1197,8 +1197,10 @@ static inline int virtqueue_add_packed(struct virtqueue *_vq, if (virtqueue_use_indirect(_vq, total_sg)) { err = virtqueue_add_indirect_packed(vq, sgs, total_sg, out_sgs, in_sgs, data, gfp); - if (err != -ENOMEM) + if (err != -ENOMEM) { + END_USE(vq); return err; + } /* fall back on direct */ } |