linux-kernel - [PATCHv2 1/1] clk/zynq: Fix possible memory leak

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Date:	Mon,  7 Oct 2013 23:25:44 -0300
From:	Felipe Pena <felipensp@...il.com>
To:	Mike Turquette <mturquette@...aro.org>,
	Michal Simek <michal.simek@...inx.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Sören Brinkmann <soren.brinkmann@...inx.com>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Felipe Pena <felipensp@...il.com>
Subject: [PATCHv2 1/1] clk/zynq: Fix possible memory leak

The zynq_clk_register_fclk function can leak memory (fclk_lock) when unable
to alloc memory for fclk_gate_lock

Signed-off-by: Felipe Pena <felipensp@...il.com>
Acked-by: Sören Brinkmann <soren.brinkmann@...inx.com>
---
 drivers/clk/zynq/clkc.c |   16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/zynq/clkc.c b/drivers/clk/zynq/clkc.c
index cc40fe6..10772aa 100644
--- a/drivers/clk/zynq/clkc.c
+++ b/drivers/clk/zynq/clkc.c
@@ -117,13 +117,19 @@ static void __init zynq_clk_register_fclk(enum zynq_clk fclk,
 		goto err;
 	fclk_gate_lock = kmalloc(sizeof(*fclk_gate_lock), GFP_KERNEL);
 	if (!fclk_gate_lock)
-		goto err;
+		goto err_fclk_gate_lock;
 	spin_lock_init(fclk_lock);
 	spin_lock_init(fclk_gate_lock);

 	mux_name = kasprintf(GFP_KERNEL, "%s_mux", clk_name);
+	if (!mux_name)
+		goto err_mux_name;
 	div0_name = kasprintf(GFP_KERNEL, "%s_div0", clk_name);
+	if (!div0_name)
+		goto err_div0_name;
 	div1_name = kasprintf(GFP_KERNEL, "%s_div1", clk_name);
+	if (!div1_name)
+		goto err_div1_name;

 	clk = clk_register_mux(NULL, mux_name, parents, 4,
 			CLK_SET_RATE_NO_REPARENT, fclk_ctrl_reg, 4, 2, 0,
@@ -147,6 +153,14 @@ static void __init zynq_clk_register_fclk(enum zynq_clk fclk,

 	return;

+err_div1_name:
+	kfree(div0_name);
+err_div0_name:
+	kfree(mux_name);
+err_mux_name:
+	kfree(fclk_gate_lock);
+err_fclk_gate_lock:
+	kfree(fclk_lock);
 err:
 	clks[fclk] = ERR_PTR(-ENOMEM);
 }
--
1.7.10.4

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