From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793831397; b=hqq7FxgHR29FKv1t7gkHKK3Rap9sV+2QI2mh/8s9WIrtsdQHG0N9Xxx/GQHPhXx21Ja3 tZHAfbus/QeNUvtr7JnPIFIcrmxMcXELpxb9riK8cmHDGzce8krL4oxqN0e2VUcjrxYnt eqjpCUUr/RTjxQp8Upm5W5sbHuwnWItbrLMcf66MYpL29tpqT3yJPhCVJdVlHIY5vYvHI AoJNtNAvYlQ8I4zbPiV9CYkpagmQo/4kXXyqpj16pc2gM6JQltIGt+YyE/i0pqmtB1Fme TE0xTh91msnj97RMkawHkZU9Fo4XOouZ+L+n7FRfrKKgI9TRp6UplBHJfZV7tmXbf6w== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793831397; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=GmbndzdZ9R1R8i7GMzt8aNhmaitnqMYuVbKcE2Egngw=; b=ppCBCbJja4HfiWONulQH7Q1gad82Dm5HfAMNUCIZk61oppd+mj8QzLV+oHoa61bCOauM ZlluBbg+Jy6r/YfoNPh9Vs9hoAKhZKsDZH4itWeZ1D1tfHGx4FPYu427SzAfCKsKZ0foY lYT0f52TjbavR15/vdFh2hWMK72/lKAeZ9qq611DjYPgGS0TwITpMHEmmeNbvaM2cDEFT J5aZRJK5/10+6HBPeexBV2dqeKWq1x3I/ymdnoXP07Ws4bPuMiUSrXpU8ZSDRF2A/EgGa eRzt3jYoNaTL5f9XFZhp3szO+acc1ExGLP40RBXTG7VmAIgJyrgNZdz1JuLSjxLkO3Q== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=cktkmivj; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7B110606AB10; Wed, 4 Nov 2026 22:29:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=cktkmivj Received: by smtp.kernel.org (Postfix) with ESMTPSA id D7AB41F000C1; Wed, 4 Nov 2026 22:29:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1793831397; bh=GmbndzdZ9R1R8i7GMzt8aNhmaitnqMYuVbKcE2Egngw=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=cktkmivjlXlh+en8G810lEipk1K/H0KwOaYqLnI0/dP4mNZeHYk0XZr+3/LR9nPok TG96WmZlDc3PdcfWsYwZxBVT0JUW1zxTT9nJi+79Dgbvxm8iPhEqSq5UeK7/Fxxbb7 cJlyQmHRajaIFlJcUY1G1NMqIg7IMVykNWnbE5iQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Wentao Liang , Kuninori Morimoto , Mark Brown Subject: [PATCH 6.18 0681/1005] ASoC: audio-graph-card2: Fix use-after-free in audio_graph2_link_c2c() Date: Wed, 4 Nov 2026 16:06:54 -0500 Message-ID: <20261104211102.705924209@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261104211043.516122098@linuxfoundation.org> References: <20261104211043.516122098@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: patches@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Wentao Liang commit 5ea495bccfd746b063bc6702064f167467717b41 upstream. of_graph_get_next_port() consumes the reference of its prev argument. port0 is only borrowed from the caller's iterator, so the call drops a reference the function does not own, and port0 is dereferenced again afterwards. Pass an extra reference, as graph_count_c2c() does, so the reference the callee consumes is the one taken here. Fixes: 5f281c3e82b1 ("ASoC: audio-graph-card2: use __free(device_node) for device node") Cc: stable@vger.kernel.org Signed-off-by: Wentao Liang Acked-by: Kuninori Morimoto Link: https://patch.msgid.link/20260917165851.2163548-1-vulab@iscas.ac.cn Signed-off-by: Mark Brown Signed-off-by: Greg Kroah-Hartman --- sound/soc/generic/audio-graph-card2.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/sound/soc/generic/audio-graph-card2.c +++ b/sound/soc/generic/audio-graph-card2.c @@ -969,7 +969,8 @@ int audio_graph2_link_c2c(struct simple_ struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link); struct device_node *port0 = lnk; struct device_node *ports __free(device_node) = port_to_ports(port0); - struct device_node *port1 __free(device_node) = of_graph_get_next_port(ports, port0); + struct device_node *port1 __free(device_node) = + of_graph_get_next_port(ports, of_node_get(port0)); u32 val = 0; int ret = -EINVAL;