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([183.91.15.56]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-38fb2d19f7fsm3742924a91.17.2026.08.03.03.27.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Aug 2026 03:27:53 -0700 (PDT) From: phucduc.bui@gmail.com To: Takashi Iwai , Mark Brown , Jaroslav Kysela , Liam Girdwood Cc: linux-sound@vger.kernel.org, linux-kernel@vger.kernel.org, bui duc phuc Subject: [PATCH] ASoC: core: add snd_BUG_ON() check in devm_snd_soc_register_card() Date: Mon, 3 Aug 2026 17:27:39 +0700 Message-ID: <20260803102739.55569-1-phucduc.bui@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: bui duc phuc card is dereferenced immediately, so passing NULL results in a NULL pointer dereference. A NULL dev is silently accepted, defeating the documented automatic-unregistration semantics of this devm variant. Add snd_BUG_ON() checks on both arguments to catch API misuse early. Signed-off-by: bui duc phuc --- sound/soc/soc-devres.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/sound/soc/soc-devres.c b/sound/soc/soc-devres.c index 718165ba84ac..3e946196022a 100644 --- a/sound/soc/soc-devres.c +++ b/sound/soc/soc-devres.c @@ -59,6 +59,9 @@ EXPORT_SYMBOL_GPL(devm_snd_soc_register_component); */ int devm_snd_soc_register_card(struct device *dev, struct snd_soc_card *card) { + if (snd_BUG_ON(!dev || !card)) + return -EINVAL; + card->devres_dev = dev; return snd_soc_register_card(card); } -- 2.43.0