linux-kernel - Re: ls -l /proc/1/exe -> Permission denied

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Message-ID: <53CBB143.1020206@nod.at>
Date:	Sun, 20 Jul 2014 14:08:35 +0200
From:	Richard Weinberger <richard@....at>
To:	Andreas Schwab <schwab@...ux-m68k.org>
CC:	Joakim Tjernlund <joakim.tjernlund@...nsmode.se>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: ls -l /proc/1/exe -> Permission denied

Am 20.07.2014 13:51, schrieb Andreas Schwab:
> Richard Weinberger <richard.weinberger@...il.com> writes:
>> Do you have an example?
> 
> proc symlinks are special because they actually resolve to the inode.

Ah. If an attacker manages the kernel to follow the symlink he could
indirectly access that file.
Thanks for pointing this out!

Thanks,
//richard
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