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Re: [PATCH] Fix segfault in maybe_script_execute.

On Sep 06 2018, Stefan Liebler <> wrote:

> commit 03a8c686eab8e12b4c478e7606963db6a72f6f0e
> Author: Stefan Liebler <>
> 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 Schwab, SUSE Labs,
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