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List: kernel-janitors
Subject: [PATCH 1/4] clk: mvebu: Fix a memory leak in an error handling path
From: Christophe JAILLET <christophe.jaillet () wanadoo ! fr>
Date: 2021-04-23 6:25:01
Message-ID: 27db232fdd14e14d493f29a5404d9e643f09cc96.1619157996.git.christophe.jaillet () wanadoo ! fr
[Download RAW message or body]
If an error occurs in the for_each loop, clk_name must be freed.
In order to do so, sightly rearrange the code:
- move the allocation to simplify error handling
- use kasprintf instead of kzalloc/sprintf to simplify code and avoid a
magic number
Fixes: ab8ba01b3fe5 ("clk: mvebu: add armada-370-xp CPU specific clocks")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
The { } around the 1 line block after kasprintf is intentional and makes
sense with 2/2
---
drivers/clk/mvebu/clk-cpu.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/clk/mvebu/clk-cpu.c b/drivers/clk/mvebu/clk-cpu.c
index c2af3395cf13..a11d7273fcc7 100644
--- a/drivers/clk/mvebu/clk-cpu.c
+++ b/drivers/clk/mvebu/clk-cpu.c
@@ -195,17 +195,17 @@ static void __init of_cpu_clk_setup(struct device_node *node)
for_each_of_cpu_node(dn) {
struct clk_init_data init;
struct clk *clk;
- char *clk_name = kzalloc(5, GFP_KERNEL);
+ char *clk_name;
int cpu, err;
- if (WARN_ON(!clk_name))
- goto bail_out;
-
err = of_property_read_u32(dn, "reg", &cpu);
if (WARN_ON(err))
goto bail_out;
- sprintf(clk_name, "cpu%d", cpu);
+ clk_name = kasprintf(GFP_KERNEL, "cpu%d", cpu);
+ if (WARN_ON(!clk_name)) {
+ goto bail_out;
+ }
cpuclk[cpu].parent_name = of_clk_get_parent_name(node, 0);
cpuclk[cpu].clk_name = clk_name;
--
2.27.0
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