linux-kernel - [PATCH 5.13 062/156] i3c: master: svc: drop free_irq of devm_request

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Message-Id: <20210722155630.413158197@linuxfoundation.org>
Date:   Thu, 22 Jul 2021 18:30:37 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Hulk Robot <hulkci@...wei.com>,
        Yang Yingliang <yangyingliang@...wei.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.13 062/156] i3c: master: svc: drop free_irq of devm_request_irq allocated irq

From: Yang Yingliang <yangyingliang@...wei.com>

[ Upstream commit 59a61e69c4252b4e8ecd15e752b0d2337f0121b7 ]

irq allocated with devm_request_irq() will be freed in devm_irq_release(),
using free_irq() in ->remove() will causes a dangling pointer, and a
subsequent double free. So remove the free_irq() in svc_i3c_master_remove().

Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
Reviewed-by: Miquel Raynal <miquel.raynal@...tlin.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
Link: https://lore.kernel.org/r/20210602084935.3977636-1-yangyingliang@huawei.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/i3c/master/svc-i3c-master.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c
index 1f6ba4221817..eeb49b5d90ef 100644
--- a/drivers/i3c/master/svc-i3c-master.c
+++ b/drivers/i3c/master/svc-i3c-master.c
@@ -1448,7 +1448,6 @@ static int svc_i3c_master_remove(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	free_irq(master->irq, master);
 	clk_disable_unprepare(master->pclk);
 	clk_disable_unprepare(master->fclk);
 	clk_disable_unprepare(master->sclk);
-- 
2.30.2