From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 864EF6FA1 for ; Mon, 3 Apr 2023 14:36:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DFEEDC433EF; Mon, 3 Apr 2023 14:36:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1680532615; bh=YpKGVIZwXXwpPXYfMjguBK41oZD5x+E7M/c8749YMQc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=I1DfnN6eN74siqC6/n4LPP2hqACA4pCN0UYvWERdYRQh5KYAvZZ9p3Tn7cGebRYj5 KlbR+fCuhqE/kWyDuR5tTJ5d7d8Csxo7lfWV9qvF1jvi1+ZFQufzTQ9vHHBq2Fnb/O STKHm0KPV12GTOai863d+iMm9XcsuQSI6ZbQ10n4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Kuninori Morimoto , Takashi Iwai , Sasha Levin Subject: [PATCH 6.1 049/181] ALSA: asihpi: check pao in control_message() Date: Mon, 3 Apr 2023 16:08:04 +0200 Message-Id: <20230403140416.752461760@linuxfoundation.org> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230403140415.090615502@linuxfoundation.org> References: <20230403140415.090615502@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Kuninori Morimoto [ Upstream commit 9026c0bf233db53b86f74f4c620715e94eb32a09 ] control_message() might be called with pao = NULL. Here indicates control_message() as sample. (B) static void control_message(struct hpi_adapter_obj *pao, ...) { ^^^ struct hpi_hw_obj *phw = pao->priv; ... ^^^ } (A) void _HPI_6205(struct hpi_adapter_obj *pao, ...) { ^^^ ... case HPI_OBJ_CONTROL: (B) control_message(pao, phm, phr); break; ^^^ ... } void HPI_6205(...) { ... (A) _HPI_6205(NULL, phm, phr); ... ^^^^ } Therefore, We will get too many warning via cppcheck, like below sound/pci/asihpi/hpi6205.c:238:27: warning: Possible null pointer dereference: pao [nullPointer] struct hpi_hw_obj *phw = pao->priv; ^ sound/pci/asihpi/hpi6205.c:433:13: note: Calling function '_HPI_6205', 1st argument 'NULL' value is 0 _HPI_6205(NULL, phm, phr); ^ sound/pci/asihpi/hpi6205.c:401:20: note: Calling function 'control_message', 1st argument 'pao' value is 0 control_message(pao, phm, phr); ^ Set phr->error like many functions doing, and don't call _HPI_6205() with NULL. Signed-off-by: Kuninori Morimoto Link: https://lore.kernel.org/r/87ttypeaqz.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Takashi Iwai Signed-off-by: Sasha Levin --- sound/pci/asihpi/hpi6205.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sound/pci/asihpi/hpi6205.c b/sound/pci/asihpi/hpi6205.c index 27e11b5f70b97..c7d7eff86727f 100644 --- a/sound/pci/asihpi/hpi6205.c +++ b/sound/pci/asihpi/hpi6205.c @@ -430,7 +430,7 @@ void HPI_6205(struct hpi_message *phm, struct hpi_response *phr) pao = hpi_find_adapter(phm->adapter_index); } else { /* subsys messages don't address an adapter */ - _HPI_6205(NULL, phm, phr); + phr->error = HPI_ERROR_INVALID_OBJ_INDEX; return; } -- 2.39.2