diff mbox series

[5.7,317/376] power: supply: core: fix memory leak in HWMON error path

Message ID 20200619141725.337093073@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

gregkh@linuxfoundation.org June 19, 2020, 2:33 p.m. UTC 
From: Qiushi Wu <wu000273@umn.edu>

commit 1d7a7128a2e9e1f137c99b0a44e94d70a77343e3 upstream.

In function power_supply_add_hwmon_sysfs(), psyhw->props is
allocated by bitmap_zalloc(). But this pointer is not deallocated
when devm_add_action fail,  which lead to a memory leak bug. To fix
this, we replace devm_add_action with devm_add_action_or_reset.

Cc: stable@kernel.org
Fixes: e67d4dfc9ff19 ("power: supply: Add HWMON compatibility layer")
Signed-off-by: Qiushi Wu <wu000273@umn.edu>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/power/supply/power_supply_hwmon.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

--- a/drivers/power/supply/power_supply_hwmon.c
+++ b/drivers/power/supply/power_supply_hwmon.c
@@ -304,7 +304,7 @@  int power_supply_add_hwmon_sysfs(struct
 		goto error;
 	}
 
-	ret = devm_add_action(dev, power_supply_hwmon_bitmap_free,
+	ret = devm_add_action_or_reset(dev, power_supply_hwmon_bitmap_free,
 			      psyhw->props);
 	if (ret)
 		goto error;