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

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Message-Id: <20231215121431.680-1-petrtesarik@huaweicloud.com>
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