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Re: 4.7-rc7: use-after-free in proc_map_files_readdir

From Dave Jones <davej@codemonkey.org.uk>
Newsgroups linux.kernel
Subject Re: 4.7-rc7: use-after-free in proc_map_files_readdir
Date 2016-07-19 17:40 +0200
Message-ID <rWFhM-5LH-23@gated-at.bofh.it> (permalink)
References <rWBea-3l1-11@gated-at.bofh.it>
Organization linux.* mail to news gateway

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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

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Thread

Re: 4.7-rc7: use-after-free in proc_map_files_readdir Alexey Dobriyan <adobriyan@gmail.com> - 2016-07-19 13:20 +0200
  Re: 4.7-rc7: use-after-free in proc_map_files_readdir Dave Jones <davej@codemonkey.org.uk> - 2016-07-19 17:40 +0200
    Re: 4.7-rc7: use-after-free in proc_map_files_readdir Al Viro <viro@ZenIV.linux.org.uk> - 2016-07-19 18:30 +0200
      Re: 4.7-rc7: use-after-free in proc_map_files_readdir Dave Jones <davej@codemonkey.org.uk> - 2016-07-19 20:40 +0200
        Re: 4.7-rc7: use-after-free in proc_map_files_readdir Al Viro <viro@ZenIV.linux.org.uk> - 2016-07-19 21:40 +0200
          Re: 4.7-rc7: use-after-free in proc_map_files_readdir Dave Jones <davej@codemonkey.org.uk> - 2016-07-19 21:50 +0200
          Re: 4.7-rc7: use-after-free in proc_map_files_readdir Dave Jones <davej@codemonkey.org.uk> - 2016-07-20 15:20 +0200
    Re: 4.7-rc7: use-after-free in proc_map_files_readdir Alexey Dobriyan <adobriyan@gmail.com> - 2016-07-19 21:30 +0200

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