linux-kernel - [PATCH 0/4] x86/alternatives: Do NOPs optimization on a temporary buffer

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: Tue, 30 Jan 2024 11:59:37 +0100
From: Borislav Petkov <bp@...en8.de>
To: X86 ML <x86@...nel.org>
Cc: Paul Gortmaker <paul.gortmaker@...driver.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 0/4] x86/alternatives: Do NOPs optimization on a temporary buffer

From: "Borislav Petkov (AMD)" <bp@...en8.de>

Hi,

here's a small set which sprang out from my reacting to the fact that
NOPs optimization in the alternatives code needs to happen on
a temporary buffer like the other alternative operations - not in-place
and cause all kinds of fun.

The result is this, which makes the alternatives code simpler and it is
a net win, size-wise:

 1 file changed, 50 insertions(+), 72 deletions(-)

Constructive feedback is always welcome!

Thx.

Borislav Petkov (AMD) (4):
  x86/alternatives: Use a temporary buffer when optimizing NOPs
  x86/alternatives: Get rid of __optimize_nops()
  x86/alternatives: Optimize optimize_nops()
  x86/alternatives: Sort local vars in apply_alternatives()

 arch/x86/kernel/alternative.c | 122 ++++++++++++++--------------------
 1 file changed, 50 insertions(+), 72 deletions(-)

-- 
2.43.0