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=1793827054; b=o8XxrDMyRzWpU+gxkup4zeEIHUkah/cfK+uUcO+HLphRKb5XhUjDccjCkykRL9w6J0fv oRxhG9S82hAxko8k/+kpVfPssujRgQYjyWHs/MBxjHN56rj82a2OpTMuzU7Vp4oeJX5ar pPH94tbYQWWk+mkw5lxx8/DQcaeG7pjzF0uf/wbnahav+ngt6BuPCzx2vPPD/Bw+oDu8r TXYFnTeAL4QjKq1Lj+unjM2hlnOKpFYVS9eN9ipjET/4+jkGjEF73V8+DjcyRSS9BQHXS phtliw9mqD0llRfrnIG24qBqfrf4XQ8Rip8EgjMC07U6Y7XYNnDMOhdMsRUOZ+8W0cQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793827054; 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=sRgI6R5HZQy+V5uuPS1W80C85iTTuGQEneJBIaR713Y=; b=GOzNBI3No7zdUY4Co+Apz9dv7vKfYQ3bJPyCTGA37YqNKVG4ghM4dbOhxjJomWuqxuPm EoY3ffSiccuaBUwhX4/I/c/ZrC/V/PXmDXIDz60ap9ec+NpMNRbjgeJE8ds77YX9I670n gtIIpxD0+BGbqrzQG/aRCw0csedv3Qw5zkuMGw1o6DCjPTsyqjJ5eDNtz7uIxfLweF3b0 mqUcSSPWDyEJX8Zevm6bDBZLuw8hDnkVupCSghkceJobpOrdDBd2kGOBWk7jFFLtLu9hP icTInQuD+BP4vKXQsFVPCT2sCF0cWmiom7DRUukHSlNgqDgMqFnc3aaCZ5XoOU4dogQ== 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=A0LAFoqy; 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 916A5606AE22; Wed, 4 Nov 2026 21:17:34 +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=A0LAFoqy Received: by smtp.kernel.org (Postfix) with ESMTPSA id 197631F000C1; Wed, 4 Nov 2026 21:17:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1793827054; bh=sRgI6R5HZQy+V5uuPS1W80C85iTTuGQEneJBIaR713Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=A0LAFoqy0zQPkY+guo+cTQ3/1H5ltEWLMacC+3Gab2LRTXxZXzgl5fF5qRqIbyENe jd41wqhwF1434gOqSlBp0OyXLp349b7ZEhIX//3pxK8CO5yIGhGuWOya1IaCTeH9Nl 3H2nKnURReAWMm53gbVgJhdRjESFUg4vX8qmtLi8= 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 7.3 166/547] ASoC: audio-graph-card2: Fix use-after-free in audio_graph2_link_c2c() Date: Wed, 4 Nov 2026 16:05:50 -0500 Message-ID: <20261104211042.867402994@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261104211038.406938024@linuxfoundation.org> References: <20261104211038.406938024@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 7.3-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;