linux-kernel - [PATCH 00/19] x86, mpx updates for 4.2 (take 6)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 08 May 2015 11:59:48 -0700
From:	Dave Hansen <dave@...1.net>
To:	linux-kernel@...r.kernel.org
Cc:	x86@...nel.org, tglx@...utronix.de, Dave Hansen <dave@...1.net>
Subject: [PATCH 00/19] x86, mpx updates for 4.2 (take 6)

Changes from take 5 / v20:

 * Fix get_xsave_addr() to consult xstate_bv in anticipation
   of fixes to xsave code.
 * Bug fix for when an VMA being unmapped has neighbors which
   are bounds tables.
 * Rewrite unmapping code.  I didn't do this lightly. It was
   not originally my own code, and I resisted changing it
   because it worked.  But, I started bug chasing and decided
   it was unmaintainable.  The rewrite ended up removing
   about 20% of the unmapping code and made it much simpler.

Changes from take 4 / v19:

 * Do not pass a task_struct around when we are
   really just going to operate on current

Changes from take 3 / v18 (all minor):

 * use DECLARE_EVENT_CLASS()/DEFINE_EVENT() for
   the ranged tracepoints to save 10 lines of code.

Changes from take 2 / v17 (all minor):

 * fix a couple of whitespace borkages caught by checkpatch,
   and a spelling error or two.
 * replace printk with pr_info() for boot disable
 * change trace print format for address intervals
 * fix up variable name in tsk_get_xsave_addr() comment
 * remove tsk_get_xsave_field() GPL export
 * fix up Qiaowei's From:

--

Hi x86 maintainers,

There are a few basic things going on here:
1. Make FPU/xsave code preempt safe and work properly
2. Add trace points to make kernel and app debugging easier
3. Add a boot-time disable for mpx
4. Rewrite the unmapping code.
5. Support 32-bit binaries to run on 64-bit kernels

This sees breakage unless either booted with 'noxsaves'
or if it has Fenghua's set from here applied:

	http://lkml.kernel.org/r/1429678319-61356-1-git-send-email-fenghua.yu@intel.com

This set is also available against 4.1-rc2 in git:

  git://git.kernel.org/pub/scm/linux/kernel/git/daveh/x86-mpx.git mpx-v21

 Documentation/kernel-parameters.txt |    4
 arch/x86/include/asm/mmu_context.h  |   13
 arch/x86/include/asm/mpx.h          |   76 ++--
 arch/x86/include/asm/processor.h    |   12
 arch/x86/include/asm/xsave.h        |    1
 arch/x86/kernel/cpu/common.c        |   16
 arch/x86/kernel/traps.c             |   18 -
 arch/x86/kernel/uprobes.c           |   10
 arch/x86/kernel/xsave.c             |   73 +++-
 arch/x86/mm/mpx.c                   |  634 +++++++++++++++++++++---------------
 kernel/sys.c                        |    8
 11 files changed, 543 insertions(+), 322 deletions(-)
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/