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authorMichael S. Tsirkin <mst@redhat.com>2022-01-06 15:57:46 +0300
committerMichael S. Tsirkin <mst@redhat.com>2022-01-15 02:50:53 +0300
commit1861ba626ae9b98136f3e504208cdef6b29cd3ec (patch)
tree8f0be7c4b1e6da5a438447e0dc279362b045d380 /drivers/virtio
parent080063920777af65105e5953e2851e036376e3ea (diff)
downloadlinux-1861ba626ae9b98136f3e504208cdef6b29cd3ec.tar.xz
virtio_ring: mark ring unused on error
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>
Diffstat (limited to 'drivers/virtio')
-rw-r--r--drivers/virtio/virtio_ring.c4
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 */
}