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pinctrl: devicetree: fix refcount leak in pinctrl_dt_to_map()

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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: 91d5c5060e ("pinctrl: devicetree: fix null pointer dereferencing in pinctrl_dt_to_map")
Suggested-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Zeng Heng <zengheng4@huawei.com>
Reviewed-by: Dan Carpenter <dan.carpenter@linaro.org>
Message-ID: <20240415105328.3651441-1-zengheng4@huawei.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Zeng Heng 2024-04-15 18:53:28 +08:00 committed by Linus Walleij
parent c5d3b64c56
commit a0cedbcc88
1 changed files with 6 additions and 4 deletions
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10
drivers/pinctrl/devicetree.c
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@ -220,14 +220,16 @@ int pinctrl_dt_to_map(struct pinctrl *p, struct pinctrl_dev *pctldev)
for (state = 0; ; state++) { for (state = 0; ; state++) {
/* Retrieve the pinctrl-* property */ /* Retrieve the pinctrl-* property */
propname = kasprintf(GFP_KERNEL, "pinctrl-%d", state); propname = kasprintf(GFP_KERNEL, "pinctrl-%d", state);
if (!propname) if (!propname) {
return -ENOMEM; ret = -ENOMEM;
goto err;
}
prop = of_find_property(np, propname, &size); prop = of_find_property(np, propname, &size);
kfree(propname); kfree(propname);
if (!prop) { if (!prop) {
if (state == 0) { if (state == 0) {
of_node_put(np); ret = -ENODEV;
return -ENODEV; goto err;
} }
break; break;
} }