linux uml segfault

[Johannes Berg]

On Thu, 2021-03-04 at 07:28 +0000, Anton Ivanov wrote:
> 
> > Now, I don't know how to fix it (short of changing your nsswitch
> > configuration) - maybe we could somehow rename sem_init()? Or maybe we
> > can somehow give the kernel binary a lower symbol resolution than the
> > libc/libpthread.
> 
> I have not looked in depth in how the linking process works, but it 
> should have picked up the sem_init from the kernel library, not libc.

Well, no, other way around? libnss/libcom_err should have gotten (should
get) the one from libpthread, not the one from the kernel.

> We are already supposed to do that regarding kernel vs libc string.h 
> functions - memcpy, etc.
> 
> Though for all of them the libc does the same so invoking the wrong one 
> does not kill you so this may have been broken for a while and we were 
> simply not noticing it.

Indeed.

johannes