linux-kernel - Re: execve errno setting on MIPS

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Message-ID:  <loom.20080918T052854-761@post.gmane.org>
Date:	Thu, 18 Sep 2008 05:34:00 +0000 (UTC)
From:	Halesh S <halesh.s@...ia.com>
To:	linux-kernel@...r.kernel.org
Subject:  Re: execve errno setting on MIPS


I will change the Subject line "execve exit status on MIPS" first.


David Newall <davidn <at> davidnewall.com> writes:
> 
> Halesh S wrote:
> > char e2BIG[ARG_MAX+1][10];
> > ...
> >   for(ind = 0; ind < ARG_MAX+1; ind++)
> >     strcpy(e2BIG[ind], "helloworld");
> >   
> 
> Did you intend to overflow e2BIG?  You're copying 11 bytes (including
> terminating NUL) into a 10 byte array.
> 

My intenstion is not to overflow in string...
We can change
> >     strcpy(e2BIG[ind], "helloworld");
to
     strcpy(e2BIG[ind], "helloworl");

But intenstion is to generate E2BIG in
  if ((ret = execve(EXE_NAME,e2BIG,envList)) == -1) {

where e2BIG array has more number arguments than ARG_MAX.

Which was possible on ARM,PPC and i386....

For the same code...I got 14 EFAULT....


Thanks,
Halesh








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