linux-kernel - [PATCH AUTOSEL 5.5 120/121] rtc: imx-sc: Align imx sc msg structs to 4

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Message-Id: <20200411230706.23855-120-sashal@kernel.org>
Date:   Sat, 11 Apr 2020 19:07:05 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Leonard Crestez <leonard.crestez@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Sasha Levin <sashal@...nel.org>, linux-rtc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH AUTOSEL 5.5 120/121] rtc: imx-sc: Align imx sc msg structs to 4

From: Leonard Crestez <leonard.crestez@....com>

[ Upstream commit a29de86521d8a80cb0b426638d4e38707cafa2e2 ]

The imx SC api strongly assumes that messages are composed out of
4-bytes words but some of our message structs have odd sizeofs.

This produces many oopses with CONFIG_KASAN=y.

Fix by marking with __aligned(4).

Fixes: a3094fc1a15e ("rtc: imx-sc: add rtc alarm support")
Signed-off-by: Leonard Crestez <leonard.crestez@....com>
Link: https://lore.kernel.org/r/13404bac8360852d86c61fad5ae5f0c91ffc4cb6.1582216144.git.leonard.crestez@nxp.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/rtc/rtc-imx-sc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/rtc/rtc-imx-sc.c b/drivers/rtc/rtc-imx-sc.c
index cf2c12107f2b8..a5f59e6f862e0 100644
--- a/drivers/rtc/rtc-imx-sc.c
+++ b/drivers/rtc/rtc-imx-sc.c
@@ -37,7 +37,7 @@ struct imx_sc_msg_timer_rtc_set_alarm {
 	u8 hour;
 	u8 min;
 	u8 sec;
-} __packed;
+} __packed __aligned(4);
 
 static int imx_sc_rtc_read_time(struct device *dev, struct rtc_time *tm)
 {
-- 
2.20.1