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> From: Samuel Jean <[email protected]> > Date: January 12, 2017 at 3:54:42 PM EST > To: [email protected] > Subject: [BUG] ovs-ofctl version 2.5.0 will crash with OFPFMFC_BAD_COMMAND > > Hi, > > It seems that shelling out to ovs-ofctl very quickly can lead to bug where it > reports an OFPT_ERROR. > > We were able to constantly reproduce within minutes of running the above flow > modifications on Unbutu. > > Any help, hints or guidance would be appreciated. I'd be happy to pursue > some debugging that would be required to nail down the issue here. > > Best regards, > Sam Jean > > # cat ./ofpcrash.sh > #!/bin/sh > ovs-ofctl add-flow br0 > 'priority=100,table=25,idle_timeout=0,actions=resubmit(,35)' || exit 1 > ovs-ofctl add-flow br0 > 'priority=100,table=35,idle_timeout=0,actions=resubmit(,45)' || exit 1 > ovs-ofctl add-flow br0 > 'priority=100,table=45,idle_timeout=0,actions=resubmit(,50)' || exit 1 > ovs-ofctl add-flow br0 > 'priority=100,table=50,idle_timeout=0,actions=resubmit(,65)' || exit 1 > ovs-ofctl add-flow br0 > 'priority=100,table=65,idle_timeout=0,actions=output:1' || exit 1 > ovs-ofctl add-flow br0 > 'priority=3000,ip,dl_dst=01:00:00:00:00:00/01:00:00:00:00:00,table=0,idle_timeout=0,actions=drop' > || exit 1 > ovs-ofctl add-flow br0 > 'priority=1000,ip,in_port=1,dl_dst=0c:01:00:12:cf:01,table=0,idle_timeout=0,cookie=20250774994944,actions=resubmit(,25)' > || exit 1 > > # while true; do ./ofpcrash.sh || break; done > OFPT_ERROR (xid=0x4): OFPFMFC_BAD_COMMAND > OFPT_FLOW_MOD (xid=0x4): > (***truncated to 64 bytes from 88***) > 00000000 01 0e 00 58 00 00 00 04-00 38 20 ff 00 00 00 00 |...X.....8 .....| > 00000010 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 |................| > 00000020 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 |................| > 00000030 00 00 00 00 00 00 00 00-32 00 00 00 00 00 00 64 |........2......d| > > # ovs-ofctl --version > ovs-ofctl (Open vSwitch) 2.5.0 > Compiled Sep 15 2016 12:55:18 > OpenFlow versions 0x1:0x4 > > # uname -srmvp > Linux 3.13.0-100-generic #147-Ubuntu SMP Tue Oct 18 16:48:51 UTC 2016 x86_64 > x86_64
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