linux-kernel - [PATCH v1 0/3] regcache: Avoid accessing non-initialised cache

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: <20260210161058.53093-1-andriy.shevchenko@linux.intel.com>
Date: Tue, 10 Feb 2026 17:09:07 +0100
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: linux-kernel@...r.kernel.org,
	Oleksij Rempel <o.rempel@...gutronix.de>
Cc: Mark Brown <broonie@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Danilo Krummrich <dakr@...nel.org>
Subject: [PATCH v1 0/3] regcache: Avoid accessing non-initialised cache

FIXME cover letter

Some caches may not allow writes before full initialisation is done.
In particular on REGMAP_MAPLE caches when we want to populate cache
with the values (reg_defaults_raw == NULL && num_reg_defaults_raw != 0)
from HW, the NULL pointer dereference may happen. Address this by moving
the IO after cache initialisation is done.

Andy Shevchenko (3):
  regcache: Remove duplicate check in regcache_hw_init()
  regcache: Split regcache_count_cacheable_registers() helper
  regcache: Move HW readback after cache initialisation

 drivers/base/regmap/regcache.c | 44 ++++++++++++++++++++--------------
 1 file changed, 26 insertions(+), 18 deletions(-)

-- 
2.50.1