[PATCH] pinctrl: pinconf-generic: fix properties bitmap leak in parse_fw_cfg()

[PATCH] pinctrl: pinconf-generic: fix properties bitmap leak in parse_fw_cfg()

[Felix Gu]

In parse_fw_cfg(), if fwnode_property_match_property_string() fails with
-ENOENT, the code returns directly and leaks the bitmap.

Use __free(bitmap) for automatic cleanup to fix the leak.

Fixes: 9c105255108b ("pinctrl: pinconf-generic: perform basic checks on pincfg properties")
Signed-off-by: Felix Gu <ustc.gu@gmail.com>
---
 drivers/pinctrl/pinconf-generic.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/pinctrl/pinconf-generic.c b/drivers/pinctrl/pinconf-generic.c
index 64ed28309788..077149121628 100644
--- a/drivers/pinctrl/pinconf-generic.c
+++ b/drivers/pinctrl/pinconf-generic.c
@@ -225,10 +225,9 @@ static int parse_fw_cfg(struct fwnode_handle *fwnode,
 			unsigned int count, unsigned long *cfg,
 			unsigned int *ncfg)
 {
-	unsigned long *properties;
 	int i, test;
 
-	properties = bitmap_zalloc(count, GFP_KERNEL);
+	unsigned long *properties __free(bitmap) = bitmap_zalloc(count, GFP_KERNEL);
 
 	for (i = 0; i < count; i++) {
 		u32 val;
@@ -263,7 +262,6 @@ static int parse_fw_cfg(struct fwnode_handle *fwnode,
 			if (ret) {
 				pr_err("%pfw: conflicting setting detected for %s\n",
 				       fwnode, par->property);
-				bitmap_free(properties);
 				return -EINVAL;
 			}
 		}
@@ -295,7 +293,6 @@ static int parse_fw_cfg(struct fwnode_handle *fwnode,
 		pr_err("%pfw: cannot have multiple drive configurations\n",
 		       fwnode);
 
-	bitmap_free(properties);
 	return 0;
 }
 

---
base-commit: c7275b05bc428c7373d97aa2da02d3a7fa6b9f66
change-id: 20260420-pinconf-fe1894ac02ac

Best regards,
-- 
Felix Gu <ustc.gu@gmail.com>