linux-kernel - [PATCH][next] clk: bcm2835: fix memork leak on unfree'd pll struct

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Date:   Fri,  7 Jun 2019 11:45:33 +0100
From:   Colin King <colin.king@...onical.com>
To:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        bcm-kernel-feedback-list@...adcom.com,
        Eric Anholt <eric@...olt.net>,
        Stefan Wahren <stefan.wahren@...e.com>,
        linux-clk@...r.kernel.org, linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH][next] clk: bcm2835: fix memork leak on unfree'd pll struct

From: Colin Ian King <colin.king@...onical.com>

The pll struct is being allocated but not kfree'd on an error return
path when devm_clk_hw_register fails.  Fix this with a kfree on pll
if an error occurs.

Addresses-Coverity: ("Resource leak")
Fixes: b19f009d4510 ("clk: bcm2835: Migrate to clk_hw based registration and OF APIs")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/clk/bcm/clk-bcm2835.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/bcm/clk-bcm2835.c b/drivers/clk/bcm/clk-bcm2835.c
index 770bb01f523e..90584deaf416 100644
--- a/drivers/clk/bcm/clk-bcm2835.c
+++ b/drivers/clk/bcm/clk-bcm2835.c
@@ -1310,8 +1310,10 @@ static struct clk_hw *bcm2835_register_pll(struct bcm2835_cprman *cprman,
 	pll->hw.init = &init;
 
 	ret = devm_clk_hw_register(cprman->dev, &pll->hw);
-	if (ret)
+	if (ret) {
+		kfree(pll);
 		return NULL;
+	}
 	return &pll->hw;
 }
 
-- 
2.20.1