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Date:   Tue, 14 May 2019 16:41:49 -0700
From:   Yury Norov <yury.norov@gmail.com>
To:     Cyril Hrubis <chrubis@suse.cz>
Cc:     Yuri Norov <ynorov@marvell.com>, Andreas Schwab <schwab@suse.de>,
        "ltp@lists.linux.it" <ltp@lists.linux.it>,
        "linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
        Szabolcs Nagy <szabolcs.nagy@arm.com>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Heiko Carstens <heiko.carstens@de.ibm.com>,
        Philipp Tomsich <philipp.tomsich@theobroma-systems.com>,
        Joseph Myers <joseph@codesourcery.com>,
        "linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>,
        Steve Ellcey <sellcey@caviumnetworks.com>,
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        Bamvor Zhangjian <bamv2005@gmail.com>,
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Subject: Re: [LTP] [EXT] Re: [PATCH v9 00/24] ILP32 for ARM64
Message-ID: <20190514234149.GA12077@yury-thinkpad>
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On Tue, May 14, 2019 at 12:43:11PM +0200, Cyril Hrubis wrote:
> Hi!
> > > There is a problem with the stack size accounting during execve when
> > > there is no stack limit:
> > >
> > > $ ulimit -s
> > > 8192
> > > $ ./hello.ilp32 
> > > Hello World!
> > > $ ulimit -s unlimited
> > > $ ./hello.ilp32 
> > > Segmentation fault
> > > $ strace ./hello.ilp32 
> > > execve("./hello.ilp32", ["./hello.ilp32"], 0xfffff10548f0 /* 77 vars */) = -1 ENOMEM (Cannot allocate memory)
> > > +++ killed by SIGSEGV +++
> > > Segmentation fault (core dumped)
> > >
> > > Andreas.
> > 
> > Thanks Andreas, I will take a look. Do we have such test in LTP?
> 
> We do have a test that we can run a binary with very small stack size
> i.e. 512kB but there does not seem to be anything that would catch this
> specific problem.
> 
> Can you please open an issue and describe how to reproduce the problem
> at our github tracker:
> 
> https://github.com/linux-test-project/ltp/issues
> 
> Then we can create testcase based on that reproducer later on.

This is it:
https://github.com/linux-test-project/ltp/issues/530

Yury