From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 62BE32F0673; Sat, 12 Sep 2026 19:08:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789240109; cv=none; b=oS18wURhToYEupuDuddrP82ytQI0zpn9jqSVRHhjqxEUyR8VkMDYNq6RKWTWbHp38OjYfPMNUkb71ZeTJbzN8gMtf890KcwPwxOegchnHg8q8jrUqw680BL4kUkhLnsRtPvpSFkilzcOmGZ8AzXsdhCSERTmWFdORVsJcMs9PTY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789240109; c=relaxed/simple; bh=O70Kht38ogSDX0XF+XQoTNy/EAxILiEZ3cuFgU/fAd0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=p6LSwBOuJx+o7oRvu1Rl1owxzzMw/6oERbLCw/XrSj9FDzjEPErGbwc7JEARN7P0Y3SufZZVzgqGMcneMHbeb707UhTbO4lCDN6AMOZPUMRhZ5abFMmkPaO49TAHWBMhyICEh3T4dKpkVgckAHZgZg3sX/BxHngR5BJzpq+MD+w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=z3S1CA8J; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="z3S1CA8J" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8144E1F000FF; Sat, 12 Sep 2026 19:08:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789240108; bh=JXi+dA9+9JoSxgwSGvz6ulFGV91NlK5ldVykI4qkZOU=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=z3S1CA8Jq47GUiljHrmTwkfCsoNXKUc8py87o9hwg6JzfrDmfUUmDXMkyiE4WW6Om tbh9Pt8kZqhGYduOUl/bVPJlc0FR0kqGq/4COJNCGDWtXWCRYvoa5fUZtxnhhiQ+M8 OGQdNJjsH5n33mVi0Xx59aFQzdIYVa7QHzcpcTWI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Rosen Penev , Michal Simek , Mark Brown , Sasha Levin Subject: [PATCH 5.15 800/935] ASoC: xilinx: formatter_pcm: fix stream_data leak on open error Date: Sat, 12 Sep 2026 09:03:50 +0200 Message-ID: <20260912065545.187135258@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065526.833703348@linuxfoundation.org> References: <20260912065526.833703348@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev 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: Rosen Penev [ Upstream commit b992511180e126150c6ad3580a6fd568c385f4c6 ] In xlnx_formatter_pcm_open(), stream_data is allocated and adata->play_stream or adata->capture_stream is assigned early. If a later step, such as snd_pcm_hw_constraint_step() or snd_pcm_hw_constraint_integer(), fails, the function returns the error immediately. ALSA does not call the close callback when open fails, so stream_data is leaked and the stream pointer is left dangling, pointing to a substream that ALSA frees. A later interrupt would then call snd_pcm_period_elapsed() on the freed substream. Free stream_data and clear the stream pointer on the error paths. Fixes: 6f6c3c36f091 ("ASoC: xlnx: add pcm formatter platform driver") Assisted-by: opencode:deepseek-v4-flash-free Signed-off-by: Rosen Penev Reviewed-by: Michal Simek Link: https://patch.msgid.link/20260811185140.27149-1-rosenp@gmail.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- sound/soc/xilinx/xlnx_formatter_pcm.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/sound/soc/xilinx/xlnx_formatter_pcm.c b/sound/soc/xilinx/xlnx_formatter_pcm.c index dccc056e0e0a6..74a7c8e5998df 100644 --- a/sound/soc/xilinx/xlnx_formatter_pcm.c +++ b/sound/soc/xilinx/xlnx_formatter_pcm.c @@ -384,7 +384,7 @@ static int xlnx_formatter_pcm_open(struct snd_soc_component *component, if (err) { dev_err(component->dev, "Unable to set constraint on period bytes\n"); - return err; + goto error; } /* Resize the buffer bytes as divisible by 64 */ @@ -394,7 +394,7 @@ static int xlnx_formatter_pcm_open(struct snd_soc_component *component, if (err) { dev_err(component->dev, "Unable to set constraint on buffer bytes\n"); - return err; + goto error; } /* Set periods as integer multiple */ @@ -403,7 +403,7 @@ static int xlnx_formatter_pcm_open(struct snd_soc_component *component, if (err < 0) { dev_err(component->dev, "Unable to set constraint on periods to be integer\n"); - return err; + goto error; } /* enable DMA IOC irq */ @@ -412,6 +412,14 @@ static int xlnx_formatter_pcm_open(struct snd_soc_component *component, writel(val, stream_data->mmio + XLNX_AUD_CTRL); return 0; + +error: + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + adata->play_stream = NULL; + else + adata->capture_stream = NULL; + kfree(stream_data); + return err; } static int xlnx_formatter_pcm_close(struct snd_soc_component *component, -- 2.53.0