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| author | Wei Yongjun <weiyj.lk@gmail.com> | 2016-08-02 16:16:31 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2016-08-09 12:42:34 +0200 |
| commit | 58625edf9e2515ed41dac2a24fa8004030a87b87 (patch) | |
| tree | 86ca528ccabfdd57a45d70471100ce6d76edf185 /drivers/virtio/virtio_ring.c | |
| parent | Linux 4.8-rc1 (diff) | |
| download | linux-58625edf9e2515ed41dac2a24fa8004030a87b87.tar.xz linux-58625edf9e2515ed41dac2a24fa8004030a87b87.zip | |
virtio: fix memory leak in virtqueue_add()
When using the indirect buffers feature, 'desc' is allocated in
virtqueue_add() but isn't freed before leaving on a ring full error,
causing a memory leak.
For example, it seems rather clear that this can trigger
with virtio net if mergeable buffers are not used.
Cc: stable@vger.kernel.org
Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/virtio/virtio_ring.c')
| -rw-r--r-- | drivers/virtio/virtio_ring.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 114a0c88afb8..5ed228ddadba 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -327,6 +327,8 @@ static inline int virtqueue_add(struct virtqueue *_vq, * host should service the ring ASAP. */ if (out_sgs) vq->notify(&vq->vq); + if (indirect) + kfree(desc); END_USE(vq); return -ENOSPC; } |