[PATCH] libdwfl: fix crash when reading link map

[Omar Sandoval]

On Wed, Jun 09, 2021 at 09:59:06PM -0300, Érico Nogueira wrote:
> Hope you don't mind my nit, then :)

Thanks, that's what I get for sending patches out right before dinner...

> On Wed Jun 9, 2021 at 9:51 PM -03, Omar Sandoval wrote:
> > On Wed, Jun 09, 2021 at 05:45:57PM -0700, Omar Sandoval wrote:
> > > From: Omar Sandoval <osandov@fb.com>
> > > 
> > > When read_addrs() was converted was converted from a nested function to
>                                     ^^^^^^^^^^^^^ repeated words
> > > a normal function, there was a mistake in converting "buffer" from a
> > > closure variable to a parameter: we are checking whether the pointer
> > > argument is NULL, not whether the buffer itself is NULL. This causes a
> > > NULL pointer dereference when we try to use the NULL buffer later.
> > > 
> > > Fixes: 3bf41d458fb6 ("link_map: Pull read_addrs() into file scope") made
> > ^^^^
> > Stray word here, hopefully not too much trouble to fix up when applying.
>