[v2.5] CVE-2013-4127 kernel: vhost-net: use-after-free in vhost_net_flush

reference:
https://bugzilla.redhat.com/show\_bug.cgi?id=984722

vhost_net_ubuf_put_and_wait has a confusing name: it will actually also free it’s argument. vhost_net_flush tries to use the argument after passing it to vhost_net_ubuf_put_and_wait, this results in use after free.

Upstream fix:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dd7633ecd553a5e304d349aa6f8eb8a0417098c5

Introduced by:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1280c27f8e29acf4af2da914e80ec27c3dbd5c01

Introduced in upstream version:
v3.8-rc1

(from redmine: issue id 2146, created on 2013-07-18, closed on 2013-07-23)

• Relations:
  • parent #2144 (closed)