linux-kernel - Re: [PATCH -mm 3/3] ELF, coredump: allow process with empty address space to coredump

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Message-ID: <20191222145110.GA895@avx2>
Date:   Sun, 22 Dec 2019 17:51:10 +0300
From:   Alexey Dobriyan <adobriyan@...il.com>
To:     akpm@...ux-foundation.org
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH -mm 3/3] ELF, coredump: allow process with empty address
 space to coredump

On Sun, Dec 22, 2019 at 05:44:21PM +0300, Alexey Dobriyan wrote:
> Unmapping whole address space at once with
> 
> 	munmap(0, (1ULL<<47) - 4096)
> 
> or equivalent will create empty coredump.

>  tools/testing/selftests/exec/Makefile            |    1 
>  tools/testing/selftests/exec/coredump-zero-vma.c |   38 +++++++++++++++++++++++

Oh, disreard this.
Test should fork and wait properly.