[ovs-discuss] vswitchd crash with flow table 254 deletion

Ben Pfaff blp at nicira.com
Fri Mar 13 19:55:39 UTC 2015

On Tue, Mar 10, 2015 at 11:37:51PM +0530, Vijaya Mohan Guvva wrote:
> On 03/10/2015 11:28 PM, Ben Pfaff wrote:
> >On Tue, Mar 10, 2015 at 12:26:00PM +0530, Vijaya Mohan Guvva wrote:
> >>I get vswitchd crash (segfault) consistently with flow table 254
> >>deletion and with traffic. This special table has internal
> >>flows/rules (miss_rule, no_packet_in_rule etc) added during bridge
> >>creation and are getting deleting with ovs-ofctl del-flows <br_name>
> >>"table=254". These deleted stale rules are referred
> >>(xbridge->miss_rule and xbridge->no_packet_in_rule) when there is no
> >>flow match and resulting in segfault. I guess, these default flows
> >>shouldn't be deleted, but if they are part of flow tables, can be
> >>deleted. so we should move them a place where they never get deleted
> >>and always available.
> >What version of Open vSwitch is this?
> Hi Ben,
> Its v2.3.0 and v2.3.1.

Thanks, I sent out a fix for the problem, which only affects
branch-2.3.  Will you please test it out and review it?

The patch is here:



More information about the discuss mailing list