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| author | zhanghailiang | 2014-08-18 09:42:50 +0200 |
|---|---|---|
| committer | Kevin Wolf | 2014-08-20 11:57:05 +0200 |
| commit | 1bdb176ac5add5dc9d54a230da7511b66851f1e7 (patch) | |
| tree | 6d29a82d88ccac9aaa66ae1bc3aedfaa79a2e4b0 /hw | |
| parent | virtio-blk: allow block_resize with dataplane (diff) | |
| download | qemu-1bdb176ac5add5dc9d54a230da7511b66851f1e7.tar.gz qemu-1bdb176ac5add5dc9d54a230da7511b66851f1e7.tar.xz qemu-1bdb176ac5add5dc9d54a230da7511b66851f1e7.zip | |
virtio-blk: fix reference a pointer which might be freed
In function virtio_blk_handle_request, it may freed memory pointed by req,
So do not access member of req after calling this function.
Cc: qemu-stable@nongnu.org
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/block/virtio-blk.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c index 302c39e2be..d9167ce9a3 100644 --- a/hw/block/virtio-blk.c +++ b/hw/block/virtio-blk.c @@ -469,8 +469,9 @@ static void virtio_blk_dma_restart_bh(void *opaque) s->rq = NULL; while (req) { + VirtIOBlockReq *next = req->next; virtio_blk_handle_request(req, &mrb); - req = req->next; + req = next; } virtio_submit_multiwrite(s->bs, &mrb); |