linux-kernel - Re: [PATCH] proc: revert /proc/*/cmdline rewrite

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Message-ID: <5a5e6914-6450-319d-0d57-5098913ad47c@ispras.ru>
Date:   Sat, 13 Jul 2019 17:00:02 +0300
From:   Alexey Izbyshev <izbyshev@...ras.ru>
To:     Alexey Dobriyan <adobriyan@...il.com>, akpm@...ux-foundation.org
Cc:     oleg@...hat.com, mkubecek@...e.cz, torvalds@...ux-foundation.org,
        shasta@...corp.com, linux-kernel@...r.kernel.org,
        security@...nel.org
Subject: Re: [PATCH] proc: revert /proc/*/cmdline rewrite

On 7/13/19 10:32 AM, Alexey Dobriyan wrote:
> /proc/*/cmdline continues to cause problems:
> 
> 	https://lkml.org/lkml/2019/4/5/825
> 	Subject get_mm_cmdline and userspace (Perl) changing argv0
> 
> 	https://marc.info/?l=linux-kernel&m=156294831308786&w=4
> 	[PATCH] proc: Fix uninitialized byte read in get_mm_cmdline()
> 
> This patch reverts implementation to the last known good state.

I confirm that this revert fixes both issues above on my system (x86_64).

Alexey