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 6F473399011; Thu, 15 Jan 2026 17:34:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768498445; cv=none; b=WR1BoUU/ZpBbSrWsqbtsK454Jyq4851rn/yGXJFd17cmv8dGdgGK5qAuHzOLtpZ1BQFuuK60NCzfQXwgcMwj4tLOC2fN3l+udqNI2q5TAKGjP3ECTiMa8gg1R1iqL02s+VIXBT8nsMc2kcnQ9ZRZKMwLcdvvDuq2GqmHv3L5keQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768498445; c=relaxed/simple; bh=0Wla8otLegldpC9LWlbOVbfvsdwq8EaPbNj7t/bdpKE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mNQa6ps01e9RZmyyk7mcaHeVvMfkLaWRMShmdNyvXksA+auEEHk30Oq/ih6e9xwA3u+D46jatKOU2jhzJWYHv8Z/asE7vX0lGf4tV/jP0CDgkEQj8b/XQb85KmbqUnOIefeAorFKPrLLtMNdDnSbvr4NeBhaUvVGsOo1uDbrPgM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=g6N2YrKR; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="g6N2YrKR" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F15E6C16AAE; Thu, 15 Jan 2026 17:34:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1768498445; bh=0Wla8otLegldpC9LWlbOVbfvsdwq8EaPbNj7t/bdpKE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=g6N2YrKROPjb4xSOKOmmmXVz1FNMb0xaFcg8yBwVz5+R1HazfybYDbN2bUgYpe4JC fzOJzKXbvyIfxV5FCZ5BZaA5QL78+paxlk77NJiunv7TO/6eZwxCw/Q99JAO/U4aH9 CFyrD7/XLjGTnRAhF11u6tTUzB45e9Opt12Uq/5I= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Yuhao Jiang , Junrui Luo , Takashi Iwai , Sasha Levin Subject: [PATCH 5.15 435/554] ALSA: wavefront: Clear substream pointers on close Date: Thu, 15 Jan 2026 17:48:21 +0100 Message-ID: <20260115164302.007582739@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260115164246.225995385@linuxfoundation.org> References: <20260115164246.225995385@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Junrui Luo [ Upstream commit e11c5c13ce0ab2325d38fe63500be1dd88b81e38 ] Clear substream pointers in close functions to avoid leaving dangling pointers, helping to improve code safety and prevents potential issues. Reported-by: Yuhao Jiang Reported-by: Junrui Luo Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: stable@vger.kernel.org Signed-off-by: Junrui Luo Link: https://patch.msgid.link/SYBPR01MB7881DF762CAB45EE42F6D812AFC2A@SYBPR01MB7881.ausprd01.prod.outlook.com Signed-off-by: Takashi Iwai [ No guard() in older trees ] Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- sound/isa/wavefront/wavefront_midi.c | 2 ++ 1 file changed, 2 insertions(+) --- a/sound/isa/wavefront/wavefront_midi.c +++ b/sound/isa/wavefront/wavefront_midi.c @@ -294,6 +294,7 @@ static int snd_wavefront_midi_input_clos return -EIO; spin_lock_irqsave (&midi->open, flags); + midi->substream_input[mpu] = NULL; midi->mode[mpu] &= ~MPU401_MODE_INPUT; spin_unlock_irqrestore (&midi->open, flags); @@ -318,6 +319,7 @@ static int snd_wavefront_midi_output_clo return -EIO; spin_lock_irqsave (&midi->open, flags); + midi->substream_output[mpu] = NULL; midi->mode[mpu] &= ~MPU401_MODE_OUTPUT; spin_unlock_irqrestore (&midi->open, flags); return 0;