linux-kernel - [RFC PATCH 0/2] locking/ww_mutex, dma-buf/dma-resv: Improve detection of unheld locks

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: <20251120110341.2425-1-thomas.hellstrom@linux.intel.com>
Date: Thu, 20 Nov 2025 12:03:39 +0100
From: Thomas Hellström <thomas.hellstrom@...ux.intel.com>
To: intel-xe@...ts.freedesktop.org
Cc: Thomas Hellström <thomas.hellstrom@...ux.intel.com>,
	Matthew Auld <matthew.auld@...el.com>,
	Matthew Brost <matthew.brost@...el.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Will Deacon <will@...nel.org>,
	Boqun Feng <boqun.feng@...il.com>,
	Waiman Long <longman@...hat.com>,
	Sumit Semwal <sumit.semwal@...aro.org>,
	Christian König <christian.koenig@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	dri-devel@...ts.freedesktop.org,
	linaro-mm-sig@...ts.linaro.org
Subject: [RFC PATCH 0/2] locking/ww_mutex, dma-buf/dma-resv: Improve detection of unheld locks

WW mutexes and dma-resv objects, which embed them, typically have a
number of locks belocking to the same lock class. However
code using them typically want to verify the locking on
object granularity, not lock-class granularity.

This series add ww_mutex functions to facilitate that,
(patch 1) and utilizes these functions in the dma-resv lock
checks.

Thomas Hellström (2):
  kernel/locking/ww_mutex: Add per-lock lock-check helpers
  dma-buf/dma-resv: Improve the dma-resv lockdep checks

 include/linux/dma-resv.h |  7 +++++--
 include/linux/ww_mutex.h | 18 ++++++++++++++++++
 kernel/locking/mutex.c   | 10 ++++++++++
 3 files changed, 33 insertions(+), 2 deletions(-)

-- 
2.51.1