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From: Yang Yingliang <yangyingliang@huawei.com>
To: <linux-kernel@vger.kernel.org>, <linux-i3c@lists.infradead.org>
Cc: <alexandre.belloni@bootlin.com>
Subject: [PATCH -next] i3c: master: svc: drop free_irq of devm_request_irq allocated irq
Date: Tue, 18 May 2021 21:11:27 +0800	[thread overview]
Message-ID: <20210518131127.1308550-1-yangyingliang@huawei.com> (raw)

irq allocated with devm_request_irq should not be freed using
free_irq, because doing so causes a dangling pointer, and a
subsequent double free.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
---
 drivers/i3c/master/svc-i3c-master.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c
index 1f6ba4221817..761c9c468357 100644
--- a/drivers/i3c/master/svc-i3c-master.c
+++ b/drivers/i3c/master/svc-i3c-master.c
@@ -1448,7 +1448,7 @@ static int svc_i3c_master_remove(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	free_irq(master->irq, master);
+	devm_free_irq(&pdev->dev, master->irq, master);
 	clk_disable_unprepare(master->pclk);
 	clk_disable_unprepare(master->fclk);
 	clk_disable_unprepare(master->sclk);
-- 
2.25.1


WARNING: multiple messages have this Message-ID (diff)
From: Yang Yingliang <yangyingliang@huawei.com>
To: <linux-kernel@vger.kernel.org>, <linux-i3c@lists.infradead.org>
Cc: <alexandre.belloni@bootlin.com>
Subject: [PATCH -next] i3c: master: svc: drop free_irq of devm_request_irq allocated irq
Date: Tue, 18 May 2021 21:11:27 +0800	[thread overview]
Message-ID: <20210518131127.1308550-1-yangyingliang@huawei.com> (raw)

irq allocated with devm_request_irq should not be freed using
free_irq, because doing so causes a dangling pointer, and a
subsequent double free.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
---
 drivers/i3c/master/svc-i3c-master.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c
index 1f6ba4221817..761c9c468357 100644
--- a/drivers/i3c/master/svc-i3c-master.c
+++ b/drivers/i3c/master/svc-i3c-master.c
@@ -1448,7 +1448,7 @@ static int svc_i3c_master_remove(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	free_irq(master->irq, master);
+	devm_free_irq(&pdev->dev, master->irq, master);
 	clk_disable_unprepare(master->pclk);
 	clk_disable_unprepare(master->fclk);
 	clk_disable_unprepare(master->sclk);
-- 
2.25.1


-- 
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linux-i3c@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-i3c

             reply	other threads:[~2021-05-18 13:09 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-18 13:11 Yang Yingliang [this message]
2021-05-18 13:11 ` [PATCH -next] i3c: master: svc: drop free_irq of devm_request_irq allocated irq Yang Yingliang
2021-05-27 10:01 ` Miquel Raynal
2021-05-27 10:01   ` Miquel Raynal
2021-05-27 13:49   ` Yang Yingliang
2021-05-27 13:49     ` Yang Yingliang
2021-05-27 14:40     ` Miquel Raynal
2021-05-27 14:40       ` Miquel Raynal
2021-05-28  1:43       ` Yang Yingliang
2021-05-28  1:43         ` Yang Yingliang

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