segfault with BFD

[Bartosz Radwan]

On 18.07.2015 15:14, Michal Humpula wrote:
> Thanks for the hint! The crashing after inability to allocate socket, 
> got me thinking that it only occurs only in one connection and only on 
> one instance. So yeah, I've got something silly like this in my setup:
>
> protocol bgp test {
>   neighbor 10.0.1.2 as 1;
>   source address 10.1.1.1;
>   bfd 1;
> }
>
> where source address wasn't on any interface (typo error).
>
I have similiar config on my Linux router, but in my case source address 
exists until i shut the interface down.
When the interface is shut down (ifdown interfacename), bird crashes.

May be dangerous, i could imaginge situations when i want to shut 
interface down or it just happens accidently.

Workaround that works in my lab: sysctl -w net.ipv4.ip_nonlocal_bind=1

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Bartosz Radwan