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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Leonard Crestez <leonard.crestez@nxp.com>,
	Alexandre Belloni <alexandre.belloni@bootlin.com>,
	Sasha Levin <sashal@kernel.org>,
	linux-rtc@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: [PATCH AUTOSEL 5.6 148/149] rtc: imx-sc: Align imx sc msg structs to 4
Date: Sat, 11 Apr 2020 19:03:45 -0400	[thread overview]
Message-ID: <20200411230347.22371-148-sashal@kernel.org> (raw)
In-Reply-To: <20200411230347.22371-1-sashal@kernel.org>

From: Leonard Crestez <leonard.crestez@nxp.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@nxp.com>
Link: https://lore.kernel.org/r/13404bac8360852d86c61fad5ae5f0c91ffc4cb6.1582216144.git.leonard.crestez@nxp.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Sasha Levin <sashal@kernel.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


      parent reply	other threads:[~2020-04-11 23:41 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20200411230347.22371-1-sashal@kernel.org>
2020-04-11 23:03 ` [PATCH AUTOSEL 5.6 138/149] rtc: cmos: Use spin_lock_irqsave() in cmos_interrupt() Sasha Levin
2020-04-11 23:03 ` Sasha Levin [this message]

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