linux-kernel - [PATCH 0/5] x86/microcode/intel: Microcode verification cleanups

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 for Android: free password hash cracker in your pocket

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

Date:	Mon,  7 Mar 2016 11:09:59 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	X86 ML <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 0/5] x86/microcode/intel: Microcode verification cleanups

From: Borislav Petkov <bp@...e.de>

Hi,

here's a small set which makes sure the microcode data checksum
verification is done using u32s, as the SDM says and not what we did.
The interesting part is that Chris Bainbridge caught this with UBSAN
even though the SDM has been proclaiming using unsigned dwords already.

The rest are some trivial cleanups which sprang out after me staring at
microcode_sanity_check(). FWIW, it could use some more but that's for
later.

Patches ontop of tip/x86/microcode.

Borislav Petkov (4):
  x86/microcode/intel: Get rid of DWSIZE
  x86/microcode/intel: Merge two consecutive if-statements
  x86/microcode/intel: Improve microcode sanity-checking error messages
  x86/microcode/intel: Drop orig_sum from ext signature checksum

Chris Bainbridge (1):
  x86/microcode/intel: Change checksum variables to u32

 arch/x86/include/asm/microcode_intel.h    |  1 -
 arch/x86/kernel/cpu/microcode/intel_lib.c | 58 ++++++++++++++++++++-----------
 2 files changed, 37 insertions(+), 22 deletions(-)

-- 
2.3.5