[Dnsmasq-discuss] dnsmasq has started crashing rather frequently

[Chris Green]

On Thu, Sep 08, 2022 at 12:50:53PM +0100, Simon Kelley wrote:
> 
> 
> On 05/09/2022 20:07, Chris Green wrote:
> > I am running dnsmasq version 2.86 on xubuntu 22.04.  Just recently (i.e. in
> > the past few weeks) it has started crashing with a segfault.  The syslog has
> > the following:-
> > 
> > Sep 5 19:43:14 t470 dnsmasq[13183]: no servers found in /run/NetworkManager/no-stub-resolv.conf, 
> will retry 
> >      ...
> >      ...
> >      ...
> > Sep 5 19:43:16 t470 kernel: [25987.169664] dnsmasq[13183]: segfault at 
> 558f820a9d9b ip 0000558f80d2db8e sp 00007fff6a7cb810 error 4 in dnsmasq[558f80cdf000+52000] 
> 
> > Sep 5 19:43:16 t470 kernel: [25987.169714] Code: 29 c1 85 ed 0f 85 f9 
> fe ff ff 66 90 4d 85 c9 7f 19 e9 ed fe ff ff 66 0f 1f 44 00 00 49 83 c7 
> 01 49 83 e9 01 0f 84 fa fd ff ff 41 80 7f ff 2e 75 eb e9 ee fd ff ff 66 
> 0f 1f 44 00 00 0f b7 45 02 
> > Sep 5 19:43:16 t470 systemd[1]: dnsmasq.service: Main process exited, 
> code=dumped, status=11/SEGV 
> >      Sep  5 19:43:16 t470 systemd[1]: dnsmasq.service: Failed with result 'core-dump'.
> > 
> > 
> > It didn't used to crash like this.  I see that dnsmasq was moved from version
> > 2.85 to version 2.86 at the end of July 2022, is there possibly a bug in 2.86
> > causing these crashes?
> > 
> 
> Almost certainly this one:
> 
> https://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=d290630d31f4517ab26392d00753d1397f9a4114 
> 
Yes, that describes the symptoms exactly!
> 
> 
> Fixed in the forthcoming 2.87 release.
> 
Good, thank you.

-- 
Chris Green