linux-kernel - Re: 4.7-rc7: use-after-free in proc_map_files

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Message-ID: <20160719153145.GA11224@codemonkey.org.uk>
Date:	Tue, 19 Jul 2016 11:31:45 -0400
From:	Dave Jones <davej@...emonkey.org.uk>
To:	Alexey Dobriyan <adobriyan@...il.com>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: 4.7-rc7: use-after-free in proc_map_files_readdir

On Tue, Jul 19, 2016 at 02:16:36PM +0300, Alexey Dobriyan wrote:
 > > BUG: KASAN: use-after-free in proc_map_files_readdir+0x2e3/0x5a0 at addr ffff88044feb2044
 > 
 > Just in case can you addr2line this address or post disassembly?

http://codemonkey.org.uk/junk/fs_proc_base.dis.txt

Which by my math, looks to be..

    7253:       41 8b 87 84 00 00 00    mov    0x84(%r15),%eax
                        info.len = snprintf(info.name,

inlined from dir_emit_dots()

	Dave