linux-kernel - [RESEND PATCH v3 0/3] x86/mm: LAM fixups and 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: Windows password security audit tool. GUI, reports in PDF.

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

Date: Tue,  2 Jul 2024 13:21:36 +0000
From: Yosry Ahmed <yosryahmed@...gle.com>
To: x86@...nel.org
Cc: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, 
	Dave Hansen <dave.hansen@...ux.intel.com>, "H. Peter Anvin" <hpa@...or.com>, 
	Andy Lutomirski <luto@...nel.org>, Peter Zijlstra <peterz@...radead.org>, 
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>, 
	Rick Edgecombe <rick.p.edgecombe@...el.com>, Andrew Morton <akpm@...ux-foundation.org>, 
	linux-mm@...ck.org, linux-kernel@...r.kernel.org, 
	Yosry Ahmed <yosryahmed@...gle.com>
Subject: [RESEND PATCH v3 0/3] x86/mm: LAM fixups and cleanups

This series has fixups and cleanups for LAM. Most importantly, patch 1
fixes a sycnhronization issue that may cause crashes of userspace
applications. This is a resend of v3, rebased on top of v6.10-rc6.

v3: https://lore.kernel.org/lkml/20240418012835.3360429-1-yosryahmed@google.com/
v2: https://lore.kernel.org/lkml/20240312155641.4003683-1-yosryahmed@google.com/
v1: https://lore.kernel.org/lkml/20240312035951.3535980-1-yosryahmed@google.com/
RFC: https://lore.kernel.org/lkml/20240307133916.3782068-1-yosryahmed@google.com/

Yosry Ahmed (3):
  x86/mm: Use IPIs to synchronize LAM enablement
  x86/mm: Fix LAM inconsistency during context switch
  x86/mm: Cleanup prctl_enable_tagged_addr() nr_bits error checking

 arch/x86/include/asm/mmu_context.h |  8 +++++++-
 arch/x86/include/asm/tlbflush.h    |  9 ++++-----
 arch/x86/kernel/process_64.c       | 25 ++++++++++++++++---------
 arch/x86/mm/tlb.c                  | 15 ++++++++-------
 4 files changed, 35 insertions(+), 22 deletions(-)

-- 
2.45.2.803.g4e1b14247a-goog