[PATCH] Fix segfault in maybe_script_execute.

[Stefan Liebler]

On 09/06/2018 12:33 PM, Andreas Schwab wrote:
> On Sep 06 2018, Stefan Liebler <stli@linux.ibm.com> wrote:
> 
>> commit 03a8c686eab8e12b4c478e7606963db6a72f6f0e
>> Author: Stefan Liebler <stli@linux.ibm.com>
>> Date:   Thu Sep 6 12:27:38 2018 +0200
>>
>>      Fix segfault in maybe_script_execute.
>>      
>>      If glibc is built with gcc 8 and -march=z900,
>>      the testcase posix/tst-spawn4-compat crashes with a segfault.
>>      
>>      In function maybe_script_execute, the new_argv array is dynamically
>>      initialized on stack with (argc + 1) elements.
>>      The function wants to add _PATH_BSHELL as the first argument
>>      and writes out of bounds of new_argv.
>>      There is an off-by-one because maybe_script_execute fails to count
>>      the terminating NULL when sizing new_argv.
>>      
>>      ChangeLog:
>>      
>>              * sysdeps/unix/sysv/linux/spawni.c (maybe_script_execute):
>>              Increment size of new_argv by one.
> 
> Ok, thanks.
> 
> Andreas.
> 

Committed.

Thanks.
Stefan