| commit | 46aa92d1ba162b4b3d6b7102440e459d4e4ee255 | [log] [tgz] |
|---|---|---|
| author | Michael S. Tsirkin <mst@redhat.com> | Sun Mar 17 02:46:09 2013 +0000 |
| committer | David S. Miller <davem@davemloft.net> | Sun Mar 17 14:28:54 2013 -0400 |
| tree | 98dd50e4b0420724c04fe00b188155fcb41a4476 | |
| parent | 3d84fa98aca7f05f7010022bc45acb1b50326332 [diff] |
vhost/net: fix heads usage of ubuf_info ubuf info allocator uses guest controlled head as an index, so a malicious guest could put the same head entry in the ring twice, and we will get two callbacks on the same value. To fix use upend_idx which is guaranteed to be unique. Reported-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Cc: stable@kernel.org Signed-off-by: David S. Miller <davem@davemloft.net>