[PATCH 3.19 v4 0/2] x86, mpx: Instruction decoder fixes and hardening

[Andy Lutomirski <luto@amacapital.net>]

Hi all-

Ingo and Thomas, I think this is in decent shape for x86/urgent now
if you think it's appropriate to apply at this point in the cycle.

Changes from v3:
 - Replaced MAX_INSN_SIZE with 15 in the decoder change.  (Masami)
   I'll send the patch for 3.20 to fix MAX_INSN_SIZE separately.

Changes from v2:
 - Dropped patch 1 (fixed in tip separately)
 - Fixed comment typoes in patch 2 (noticed by Dave)

Changes from v1:
 - Dropped the TIF_IA32 change -- let's defer that until at least 3.20.
 - Fixed the MPX decode short-circuit.  v1 was buggy.
 - Patch 3 is new.  It fixes a minor regression from the MPX work.

Andy Lutomirski (2):
  x86, mpx: Short-circuit the instruction decoder for unexpected opcodes
  x86: Enforce maximum instruction size in the instruction decoder

 arch/x86/lib/insn.c |  7 +++++++
 arch/x86/mm/mpx.c   | 25 ++++++++++++++++---------
 2 files changed, 23 insertions(+), 9 deletions(-)

-- 
2.1.0