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Wysocki" Cc: Linux ACPI , linux-sound@vger.kernel.org, LKML , Andy Shevchenko , Sudeep Holla , linux-arm-kernel@lists.infradead.org, Ard Biesheuvel , Ilias Apalodimas , linux-efi@vger.kernel.org, Will Deacon , "Joerg Roedel (AMD)" , Jaroslav Kysela , Takashi Iwai , Robin Murphy , iommu@lists.linux.dev, David Rhodes , Richard Fitzgerald , patches@opensource.cirrus.com, Shenghao Ding , Kevin Lu , Baojun Xu , Sen Wang Subject: Re: [PATCH v2 3/5] ALSA: hda: cs35l41: Switch to use acpi_bus_get_primary_device() In-Reply-To: <6200303.MhkbZ0Pkbq@rafael.j.wysocki> References: <4766532.LvFx2qVVIh@rafael.j.wysocki> <6200303.MhkbZ0Pkbq@rafael.j.wysocki> User-Agent: Wanderlust/2.15.9 (Almost Unreal) Emacs/30.2 Mule/6.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-Spamd-Result: default: False [-3.29 / 50.00]; BAYES_HAM(-3.00)[100.00%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.19)[-0.966]; MIME_GOOD(-0.10)[text/plain]; MIME_TRACE(0.00)[0:+]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCPT_COUNT_TWELVE(0.00)[23]; ARC_NA(0.00)[]; RCVD_TLS_ALL(0.00)[]; URIBL_BLOCKED(0.00)[imap1.dmz-prg2.suse.org:helo,suse.de:email,suse.de:mid,intel.com:email]; TO_DN_SOME(0.00)[]; FROM_HAS_DN(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FROM_EQ_ENVFROM(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,suse.de:email,suse.de:mid] X-Spam-Flag: NO X-Spam-Score: -3.29 X-Spam-Level: On Wed, 30 Sep 2026 20:42:15 +0200, Rafael J. Wysocki wrote: > > From: "Rafael J. Wysocki" > > Replace acpi_get_first_physical_node() that is slated for removal > with acpi_bus_get_primary_device() that takes a reference to the > device it is about to return. > > This addresses a potential use-after-free that may occur if the > device returned by acpi_get_first_physical_node() is removed right > after dropping its ACPI companion's physical_node_lock in that > function. > > Signed-off-by: Rafael J. Wysocki > --- > > This patch depends on new material in linux-next. > > If you maintain the code updated by it, please consider ACKing it, so I can > pick it up and remove the problematic API replaced by it during the 7.4 > merge window. > > In the absence of feedback, it will be resent again when 7.4-rc1 is out. > > Thanks! Acked-by: Takashi Iwai thanks, Takashi