Every iteration of for_each_available_child_of_node() decrements
the reference count of the previous node, however when control is
transferred from the middle of the loop, as in the case of a return
or break or goto, there is no decrement thus ultimately resulting in
a memory leak.
Fix a potential memory leak in clk-impd1.c by inserting
of_node_put() before a return statement.
Issue found with Coccinelle.
Signed-off-by: Sumera Priyadarsini <[email protected]>
---
drivers/clk/versatile/clk-impd1.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/clk/versatile/clk-impd1.c b/drivers/clk/versatile/clk-impd1.c
index ca798249544d..85c395df9c00 100644
--- a/drivers/clk/versatile/clk-impd1.c
+++ b/drivers/clk/versatile/clk-impd1.c
@@ -109,8 +109,10 @@ static int integrator_impd1_clk_probe(struct platform_device *pdev)
for_each_available_child_of_node(np, child) {
ret = integrator_impd1_clk_spawn(dev, np, child);
- if (ret)
+ if (ret) {
+ of_node_put(child);
break;
+ }
}
return ret;
--
2.17.1
On Sat, Aug 29, 2020 at 7:57 PM Sumera Priyadarsini
<[email protected]> wrote:
> Every iteration of for_each_available_child_of_node() decrements
> the reference count of the previous node, however when control is
> transferred from the middle of the loop, as in the case of a return
> or break or goto, there is no decrement thus ultimately resulting in
> a memory leak.
>
> Fix a potential memory leak in clk-impd1.c by inserting
> of_node_put() before a return statement.
>
> Issue found with Coccinelle.
>
> Signed-off-by: Sumera Priyadarsini <[email protected]>
Reviewed-by: Linus Walleij <[email protected]>
Yours,
Linus Walleij
Quoting Sumera Priyadarsini (2020-08-29 10:57:04)
> Every iteration of for_each_available_child_of_node() decrements
> the reference count of the previous node, however when control is
> transferred from the middle of the loop, as in the case of a return
> or break or goto, there is no decrement thus ultimately resulting in
> a memory leak.
>
> Fix a potential memory leak in clk-impd1.c by inserting
> of_node_put() before a return statement.
>
> Issue found with Coccinelle.
>
> Signed-off-by: Sumera Priyadarsini <[email protected]>
> ---
Applied to clk-fixes