This is a note to let you know that I've just added the patch titled
pinctrl: devicetree: fix refcount leak in pinctrl_dt_to_map()
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pinctrl-devicetree-fix-refcount-leak-in-pinctrl_dt_t.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 637c2303364d0a04cd86442947c6144bd9305f63
Author: Zeng Heng <zengheng4@xxxxxxxxxx>
Date: Mon Apr 15 18:53:28 2024 +0800
pinctrl: devicetree: fix refcount leak in pinctrl_dt_to_map()
[ Upstream commit a0cedbcc8852d6c77b00634b81e41f17f29d9404 ]
If we fail to allocate propname buffer, we need to drop the reference
count we just took. Because the pinctrl_dt_free_maps() includes the
droping operation, here we call it directly.
Fixes: 91d5c5060ee2 ("pinctrl: devicetree: fix null pointer dereferencing in pinctrl_dt_to_map")
Suggested-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Zeng Heng <zengheng4@xxxxxxxxxx>
Reviewed-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Message-ID: <20240415105328.3651441-1-zengheng4@xxxxxxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/pinctrl/devicetree.c b/drivers/pinctrl/devicetree.c
index 362d84c2ead44..200357094e3be 100644
--- a/drivers/pinctrl/devicetree.c
+++ b/drivers/pinctrl/devicetree.c
@@ -223,14 +223,16 @@ int pinctrl_dt_to_map(struct pinctrl *p, struct pinctrl_dev *pctldev)
for (state = 0; ; state++) {
/* Retrieve the pinctrl-* property */
propname = kasprintf(GFP_KERNEL, "pinctrl-%d", state);
- if (!propname)
- return -ENOMEM;
+ if (!propname) {
+ ret = -ENOMEM;
+ goto err;
+ }
prop = of_find_property(np, propname, &size);
kfree(propname);
if (!prop) {
if (state == 0) {
- of_node_put(np);
- return -ENODEV;
+ ret = -ENODEV;
+ goto err;
}
break;
}
