linux-kernel - [PATCH 0/2] um: improve UML page fault handling

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: Fri, 15 Dec 2023 13:14:29 +0100
From: Petr Tesarik <petrtesarik@...weicloud.com>
To: Richard Weinberger <richard@....at>,
	Anton Ivanov <anton.ivanov@...bridgegreys.com>,
	Johannes Berg <johannes@...solutions.net>,
	linux-um@...ts.infradead.org (open list:USER-MODE LINUX (UML)),
	linux-kernel@...r.kernel.org (open list)
Cc: Roberto Sassu <roberto.sassu@...weicloud.com>,
	petr@...arici.cz,
	Petr Tesarik <petr.tesarik1@...wei-partners.com>
Subject: [PATCH 0/2] um: improve UML page fault handling

From: Petr Tesarik <petr.tesarik1@...wei-partners.com>

Improve UML handling of segmentation faults in kernel mode. Although
such page faults are generally caused by a kernel bug, it is annoying
if they cause an infinite loop, or panic the kernel. More importantly,
a robust implementation allows to write KUnit tests for various guard
pages, preventing potential kernel self-protection regressions.

Petr Tesarik (2):
  um: do not panic on kernel mode faults
  um: oops on accessing an non-present page in the vmalloc area

 arch/um/kernel/trap.c | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

-- 
2.34.1