linux-kernel - [PATCH v4 0/2] mm,hwpoison: fix sending SIGBUS for Action Required MCE

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]

Message-Id: <20210427062953.2080293-1-nao.horiguchi@gmail.com>
Date:   Tue, 27 Apr 2021 15:29:51 +0900
From:   Naoya Horiguchi <nao.horiguchi@...il.com>
To:     linux-mm@...ck.org, Tony Luck <tony.luck@...el.com>,
        Aili Yao <yaoaili@...gsoft.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Oscar Salvador <osalvador@...e.de>,
        David Hildenbrand <david@...hat.com>,
        Borislav Petkov <bp@...en8.de>,
        Andy Lutomirski <luto@...nel.org>,
        Naoya Horiguchi <naoya.horiguchi@....com>,
        Jue Wang <juew@...gle.com>, linux-kernel@...r.kernel.org
Subject: [PATCH v4 0/2] mm,hwpoison: fix sending SIGBUS for Action Required MCE

Hi,

I updated the series based on Boris's review.  I folded 2/3 and 3/3
into one patch, updated description, added some refactored and rebased
onto v5.12.  There's no essential change in how the problem is solved.

v1: https://lore.kernel.org/linux-mm/20210412224320.1747638-1-nao.horiguchi@gmail.com/
v2 (only 3/3 is posted): https://lore.kernel.org/linux-mm/20210419023658.GA1962954@u2004/
v3: https://lore.kernel.org/linux-mm/20210421005728.1994268-1-nao.horiguchi@gmail.com/

Thanks,
Naoya Horiguchi

--- quote from cover letter of v1 ---

I wrote this patchset to materialize what I think is the current
allowable solution mentioned by the previous discussion [1].
I simply borrowed Tony's mutex patch and Aili's return code patch,
then I queued another one to find error virtual address in the best
effort manner.  I know that this is not a perfect solution, but
should work for some typical case.

[1]: https://lore.kernel.org/linux-mm/20210331192540.2141052f@alex-virtual-machine/
---
Summary:

Naoya Horiguchi (1):
      mm,hwpoison: send SIGBUS when the page has already been poisoned

Tony Luck (1):
      mm/memory-failure: Use a mutex to avoid memory_failure() races

 arch/x86/kernel/cpu/mce/core.c |  13 ++-
 include/linux/swapops.h        |   5 ++
 mm/memory-failure.c            | 180 +++++++++++++++++++++++++++++++++++++----
 3 files changed, 182 insertions(+), 16 deletions(-)