linux-kernel - [PATCH AUTOSEL 5.4 051/130] ASoC: SOF: IPC: fix implicit type overflow

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Message-Id: <20201223021813.2791612-51-sashal@kernel.org>
Date:   Tue, 22 Dec 2020 21:16:54 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Curtis Malainey <cujomalainey@...omium.org>,
        Guennadi Liakhovetski <guennadi.liakhovetski@...ux.intel.com>,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>, alsa-devel@...a-project.org
Subject: [PATCH AUTOSEL 5.4 051/130] ASoC: SOF: IPC: fix implicit type overflow

From: Curtis Malainey <cujomalainey@...omium.org>

[ Upstream commit 7c1d0e554a359cca77bfabd2a29b06f5322d172d ]

Implicit values may have a length of 15bits (s16) so we need to declare
the proper size so we don't get undefined behaviour. This appears to be
arch and compiler dependent. This commit is to keep the headers aligned
between the firmware and kernel. UBSan discovered this bug in the
firmware.

Signed-off-by: Curtis Malainey <cujomalainey@...omium.org>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@...ux.intel.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen@...ux.intel.com>
Link: https://lore.kernel.org/r/20201120144025.2166023-1-kai.vehmanen@linux.intel.com
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 include/sound/sof/header.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/sound/sof/header.h b/include/sound/sof/header.h
index 10f00c08dbb7a..aae673b2bb5e2 100644
--- a/include/sound/sof/header.h
+++ b/include/sound/sof/header.h
@@ -30,12 +30,12 @@
 
 /* Global Message - Generic */
 #define SOF_GLB_TYPE_SHIFT			28
-#define SOF_GLB_TYPE_MASK			(0xf << SOF_GLB_TYPE_SHIFT)
+#define SOF_GLB_TYPE_MASK			(0xfL << SOF_GLB_TYPE_SHIFT)
 #define SOF_GLB_TYPE(x)				((x) << SOF_GLB_TYPE_SHIFT)
 
 /* Command Message - Generic */
 #define SOF_CMD_TYPE_SHIFT			16
-#define SOF_CMD_TYPE_MASK			(0xfff << SOF_CMD_TYPE_SHIFT)
+#define SOF_CMD_TYPE_MASK			(0xfffL << SOF_CMD_TYPE_SHIFT)
 #define SOF_CMD_TYPE(x)				((x) << SOF_CMD_TYPE_SHIFT)
 
 /* Global Message Types */
-- 
2.27.0