linux-kernel - [PATCH v3 0/2] x86/fault: Further improve #PF oops messages

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: <20181221213657.27628-1-sean.j.christopherson@intel.com>
Date:   Fri, 21 Dec 2018 13:36:55 -0800
From:   Sean Christopherson <sean.j.christopherson@...el.com>
To:     Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org
Cc:     "H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Rik van Riel <riel@...riel.com>,
        Yu-cheng Yu <yu-cheng.yu@...el.com>,
        Ingo Molnar <mingo@...nel.org>
Subject: [PATCH v3 0/2] x86/fault: Further improve #PF oops messages

Rework the messages printed for #PF oopses to display more detailed
information about the fault in human readable form and to avoid
conflicting messages and/or statements that may not always be accurate.

v3:
  - Prepend a patch to reword the initial BUG message
  - Add sample output in the changelogs
  - Swap the order of the #PF lines.  For most cases the three main lines
    show up in reverse fir-tree ordering and the cause of the fault is
    easy to pick out since it's the last thing highlighted by pr_alert
    (excepting when dumping the IDT, GDT, etc...).

v2:
  - Explicitly call out protection keys violations
  - "Slightly" reword the changelog

v1: https://lkml.kernel.org/r/20181207195223.23968-1-sean.j.christopherson@intel.com
v2: https://lkml.kernel.org/r/20181207184423.1962-1-sean.j.christopherson@intel.com

Sean Christopherson (2):
  x86/fault: Reword initial BUG message for unhandled page faults
  x86/fault: Decode and print #PF oops in human readable form

 arch/x86/mm/fault.c | 51 +++++++++++++++------------------------------
 1 file changed, 17 insertions(+), 34 deletions(-)

-- 
2.19.2