[patch] Fix path length overflow in realpath (BZ#22786)

[Andreas Schwab]

On Mai 08 2018, Paul Pluzhnikov <ppluzhnikov@google.com> wrote:

> On Tue, May 8, 2018 at 7:59 AM Andreas Schwab <schwab@suse.de> wrote:
>
>> On Apr 17 2018, Paul Pluzhnikov <ppluzhnikov@google.com> wrote:
>
>> > diff --git a/stdlib/test-bz22786.c b/stdlib/test-bz22786.c
>> > new file mode 100644
>> > index 0000000000..1b6331ac5c
>> > --- /dev/null
>> > +++ b/stdlib/test-bz22786.c
>> > @@ -0,0 +1,90 @@
>> > +/* Bug 22786: test for stack overflow in realpath.
>
>> This is actually a buffer overflow.  Ok with that change.
>
> I am not sure what you mean by that.
>
> The (stack) allocated buffer is large enough

Is it?  The condition is about the limit of the buffer being written,
and about overflow missing the limit.

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
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