[ovs-git] [openvswitch/ovs] 9e08db: ofproto-dpif-upcall: Fix null pointer dereference ...

[GitHub]

  Branch: refs/heads/branch-2.8
  Home:   https://github.com/openvswitch/ovs
  Commit: 9e08db9f5a09dbde3ff068530fe42d1fae1a01a8
      https://github.com/openvswitch/ovs/commit/9e08db9f5a09dbde3ff068530fe42d1fae1a01a8
  Author: Ben Pfaff <blp at ovn.org>
  Date:   2017-11-02 (Thu, 02 Nov 2017)

  Changed paths:
    M ofproto/ofproto-dpif-upcall.c

  Log Message:
  -----------
  ofproto-dpif-upcall: Fix null pointer dereference on exit.

When revalidation occurs at the same time that a bridge is being removed
or ovs-vswitchd is exiting, xlate_lookup_ofproto() races with deletion of
the ofproto.  This caused a null pointer dereference if revalidation lost
the race.  This commit fixes the problem.

Reported-by: Jakub Sitnicki <jkbs at redhat.com>
Tested-by: Jakub Sitnicki <jkbs at redhat.com>
Signed-off-by: Ben Pfaff <blp at ovn.org>