[ovs-git] Open vSwitch: ofproto-dpif: Close race between processing packet_ins and checking seqno. (branch-2.1)
dev at openvswitch.org
dev at openvswitch.org
Wed Apr 30 20:03:42 UTC 2014
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commit 64fbbf0deec3b4579b7cb1d0e26558ff5e03b5c2
Diffs: http://openvswitch.org/cgi-bin/gitweb.cgi?p=openvswitch;a=commitdiff;h=64fbbf0deec3b4579b7cb1d0e26558ff5e03b5c2
Author: Ben Pfaff <blp at nicira.com>
ofproto-dpif: Close race between processing packet_ins and checking seqno.
If a packet-in were to be queued, and the sequence number changed, after
grabbing the list of packet-ins, then the existing code could have gone to
sleep until something happened. By grabbing the sequence number before
the list of packet-ins, we avoid this race.
Found by inspection.
Signed-off-by: Ben Pfaff <blp at nicira.com>
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Summary of changes:
ofproto/ofproto-dpif.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
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