oss-security - Re: CVE request - kernel: untangle the do

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Message-ID: <4B567AB6.4010303@kernel.sg>
Date: Wed, 20 Jan 2010 11:38:30 +0800
From: Eugene Teo <eugeneteo@...nel.sg>
To: oss-security@...ts.openwall.com
CC: Josh Bressers <bressers@...hat.com>,
        "Steven M. Christey" <coley@...us.mitre.org>
Subject: Re: CVE request - kernel: untangle the do_mremap()
 mess

On 01/20/2010 04:41 AM, Josh Bressers wrote:
> ----- "Eugene Teo"<eugene@...hat.com>  wrote:
>> There's a pile of upstream commits that fixed issues that can lead to
>>
>> user-triggerable panics on supported boxes:
>> http://groups.google.com/group/linux.kernel/msg/895f20870532241e.
>>
>> http://groups.google.co.jp/group/fa.linux.kernel/browse_thread/thread/8bf22336b1082090
>
> I don't think CVE ids can be assigned to this without more information. I'm
> not knowledgeable enough, nor do I have the time to properly understand
> this list.

And upstream continues to give us grief...

Anyway, Al summarised the mess here:
http://marc.info/?l=linux-arch&m=126004438008670&w=2

And the pile of upstream commits were meant to address the problems 
described AFAIK. It will probably make more sense to associate all these 
related commits to just one CVE name.

I rated these cvss2=7.2/AV:L/AC:L/Au:N/C:C/I:C/A:C.

Here are the related links and patch descriptions:
1) untangling do_mremap(), part 1
54f5de709984bae0d31d823ff03de755f9dcac54
http://marc.info/?l=linux-arch&m=126015794920298&w=2
2) do_mremap() untangling, part 2
ecc1a8993751de4e82eb18640d631dae1f626bd6
http://marc.info/?l=linux-arch&m=126015795020304&w=2
3) do_mremap() untangling, part 3
1a0ef85f84feb13f07b604fcf5b90ef7c2b5c82f
http://marc.info/?l=linux-arch&m=126015799020341&w=2
4) fix checks for expand-in-place mremap
f106af4e90eadd76cfc0b5325f659619e08fb762
http://marc.info/?l=linux-kernel&m=126015827720681&w=2
5) fix the arch checks in MREMAP_FIXED case
097eed103862f9c6a97f2e415e21d1134017b135
http://marc.info/?l=linux-kernel&m=126015827720686&w=2
6) fix pgoff in "have to relocate" case of mremap()
935874141df839c706cd6cdc438e85eb69d1525e
http://marc.info/?l=linux-kernel&m=126015825720659&w=2
7) kill useless checks in sparc mremap variants
0ec62d290912bb4b989be7563851bc364ec73b56
http://marc.info/?l=linux-kernel&m=126015822220608&w=2
8) file ->get_unmapped_area() shouldn't duplicate work of 
get_unmapped_area()
c4caa778157dbbf04116f0ac2111e389b5cd7a29
http://marc.info/?l=linux-arch&m=126015804620397&w=2
9) arm: add arch_mmap_check(), get rid of sys_arm_mremap()
2ea1d13f64efdf49319e86c87d9ba38c30902782
http://marc.info/?l=linux-arch&m=126015819820566&w=2
10) Kill ancient crap in s390 compat mmap
570dcf2c15463842e384eb597a87c1e39bead99b
http://marc.info/?l=linux-kernel&m=126015810620436&w=2
11) arch_mmap_check() on mn10300
564b3bffc619dcbdd160de597b0547a7017ea010
http://marc.info/?l=linux-kernel&m=126015810620439&w=2
12) Cut hugetlb case early for 32bit on ia64
0067bd8a55862ac9dd212bd1c4f6f5bff1ca1301
http://marc.info/?l=linux-kernel&m=126015810620442&w=2
13) Unify sys_mmap*
f8b7256096a20436f6d0926747e3ac3d64c81d24
http://marc.info/?l=linux-kernel&m=126015815920506&w=2
14) fix a struct file leak in do_mmap_pgoff()
8c7b49b3ecd48923eb64ff57e07a1cdb74782970
http://marc.info/?l=linux-kernel&m=126015815920509&w=2
15) Take arch_mmap_check() into get_unmapped_area()
9206de95b1ea68357996ec02be5db0638a0de2c1
http://marc.info/?l=linux-kernel&m=126015815920512&w=2
16) switch do_brk() to get_unmapped_area()
2c6a10161d0b5fc047b5bd81b03693b9af99fab5
http://marc.info/?l=linux-arch&m=126015810820457&w=2
17) sparc_brk() is not needed anymore
05d72faa6d13c9d857478a5d35c85db9adada685
http://marc.info/?l=linux-arch&m=126015810920463&w=2
18) Get rid of open-coding in ia64_brk()
bb52d6694002b9d632bb355f64daa045c6293a4e
http://marc.info/?l=linux-arch&m=126015811020469&w=2
19) fix broken aliasing checks for MAP_FIXED on sparc32,mips,arm and sh
e77414e0aad6a1b063ba5e5750c582c75327ea6a
http://marc.info/?l=linux-arch&m=126015816020518&w=2
20) Add missing alignment check in arch/score sys_mmap()
aa65607373a4daf2010e8c3867b6317619f3c1a3

Reference:
https://bugzilla.redhat.com/show_bug.cgi?id=556703

Thanks, Eugene
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