[Dnsmasq-discuss] [Patch] Fix for use-after-free in lookup_domain

[Simon Kelley]

Thanks for that.

Are you sure the bug still exists in master?

I think there's a different solution to the same problem in

https://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=d290630d31f4517ab26392d00753d1397f9a4114

but I may be confused.


Cheers,

Simon.

On 26/02/2022 15:00, Dmitry Valter via Dnsmasq-discuss wrote:
> 
> Hi everyone!
> 
> I've been using dnsmasq 2.86 as a libvirt resolver on my laptop.
> Sometimes, likely when VM had sent a query during network reconnects,
> dnsmasq had crashed with SIGSEGV.
> Rebuilding with ASAN and a few config changes helped me to identify
> likely cause in use-after-free. The full trace is attached in
> asan-trace.txt.
> 
> Since patching it I had no crashes (for a few months now). I believe,
> this bug still can be triggered in master branch, so you may find this
> patch useful.
> 
> Patch is created against v2.87test8-2-g8e59220
> 
> 
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