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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org,
	stable@vger.kernel.org
Cc: Kuan-Wei Chiu <visitorckw@gmail.com>,
	Stephen Boyd <sboyd@kernel.org>,
	Sasha Levin <sashal@kernel.org>,
	mturquette@baylibre.com,
	conor.dooley@microchip.com,
	duje.mihanovic@skole.hr,
	linux-clk@vger.kernel.org
Subject: [PATCH AUTOSEL 6.1 40/53] clk: mmp: pxa168: Fix memory leak in pxa168_clk_init()
Date: Mon, 22 Jan 2024 10:08:41 -0500
Message-ID: <20240122150949.994249-40-sashal@kernel.org>
In-Reply-To: <20240122150949.994249-1-sashal@kernel.org>
References: <20240122150949.994249-1-sashal@kernel.org>
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From: Kuan-Wei Chiu <visitorckw@gmail.com>

[ Upstream commit 2fbabea626b6467eb4e6c4cb7a16523da12e43b4 ]

In cases where mapping of mpmu/apmu/apbc registers fails, the code path
does not handle the failure gracefully, potentially leading to a memory
leak. This fix ensures proper cleanup by freeing the allocated memory
for 'pxa_unit' before returning.

Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com>
Link: https://lore.kernel.org/r/20231210175232.3414584-1-visitorckw@gmail.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/clk/mmp/clk-of-pxa168.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/clk/mmp/clk-of-pxa168.c b/drivers/clk/mmp/clk-of-pxa168.c
index 130d1a723879..cb0ebbd82038 100644
--- a/drivers/clk/mmp/clk-of-pxa168.c
+++ b/drivers/clk/mmp/clk-of-pxa168.c
@@ -306,18 +306,21 @@ static void __init pxa168_clk_init(struct device_node *np)
 	pxa_unit->mpmu_base = of_iomap(np, 0);
 	if (!pxa_unit->mpmu_base) {
 		pr_err("failed to map mpmu registers\n");
+		kfree(pxa_unit);
 		return;
 	}
 
 	pxa_unit->apmu_base = of_iomap(np, 1);
 	if (!pxa_unit->apmu_base) {
 		pr_err("failed to map apmu registers\n");
+		kfree(pxa_unit);
 		return;
 	}
 
 	pxa_unit->apbc_base = of_iomap(np, 2);
 	if (!pxa_unit->apbc_base) {
 		pr_err("failed to map apbc registers\n");
+		kfree(pxa_unit);
 		return;
 	}
 
-- 
2.43.0