Missing patch in R13B02-1 for fixing build time segmentation fault

Rickard Green <>
Thu Sep 24 16:14:09 CEST 2009


Hmm, I was sure that I had included this patch in an earlier release, 
but obviously I had not. Sorry. I will be included in R13B03.

Regards,
Rickard
-- 
Rickard Green, Erlang/OTP, Ericsson AB.

Akira Kitada wrote:
> Hi,
> 
> I'm resubmitting Michael Turner's patch which seemingly missed in
> R13B02(-1) release.
> The original report is below.
> I confirmed this patch fixes the build issue in R13B02-1.
> 
> Please consider including this in the next release.
> 
> Thanks,
> Akira
> 
> ---------- Forwarded message ----------
> From: Michael Turner <>
> Date: Wed, Jul 29, 2009 at 5:34 PM
> Subject: [erlang-bugs] R12B01 erl_misc_utils.c stack-trashing bug, + a patch
> To: 
> 
> 
> 
> Was trying to build on a i386_unknown_freebsd4.10, with a gcc about 10
> years old.  The build died in /lib/parsetools/src.  gdb revealed
> revealed a trashed stack.
> 
> The source of the problem became clear after narrowing it down to a
> function in erl_misc_utils.c.  There are assignments to mib[0] and
> mib[1], with mib declared size zero. (Yes.  sizeof (mib) =0.  The
> first time I've ever seen that.  And the last, I hope.)
> 
> Dimension of 2 for mib[] seemed appropriate in context.  The build
> continued after that fix.
> 
> =======
> --- otp_src_R13B01/erts/lib_src/common/erl_misc_utils.c.~1~     Wed Jul 29
> 00:53:30 2009
> +++ otp_src_R13B01/erts/lib_src/common/erl_misc_utils.c Tue Jul 28
> 22:17:45 2009
> @@ -172,7 +172,7 @@ erts_cpu_info_update(erts_cpu_info_t *cp
>  #elif defined(HAVE_SYS_SYSCTL_H) && defined(CTL_HW) && (defined(HW_NCPU)
> \
>                                                        || defined(HW_AVAILCPU))
>     {
> -       int mib[0];
> +       int mib[2];
>        size_t len;
> 
> #ifdef HW_NCPU
> 
> 
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