[ovs-git] [openvswitch/ovs] 61b304: ovn-controller: fix use-after-free in physical_run...

GitHub noreply at github.com
Wed Jul 12 05:05:38 UTC 2017

  Branch: refs/heads/branch-2.7
  Home:   https://github.com/openvswitch/ovs
  Commit: 61b304b192352c0e042b1d4563ebb6ad8b8b2ac8
  Author: Lance Richardson <lrichard at redhat.com>
  Date:   2017-07-11 (Tue, 11 Jul 2017)

  Changed paths:
    M ovn/controller/physical.c

  Log Message:
  ovn-controller: fix use-after-free in physical_run()

The hmap "tunnels" is persistent across IDL loop iterations, but
stores pointers to strings in the local db replica which can be
freed as database updates are processed. Fix by storing a copy
of the string in the hmap instead of a pointer to the string in
the replica.

Found via valgrind.

Fixes: 40128e371ec3 ("physical: Refactor port binding processing.")
Signed-off-by: Lance Richardson <lrichard at redhat.com>
Signed-off-by: Ben Pfaff <blp at ovn.org>

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