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| author | Sergey Shtylyov <s.shtylyov@omp.ru> | 2023-07-19 23:22:52 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2023-07-28 23:08:58 +0300 |
| commit | ecfe9a015d3e1e46504d5b3de7eef1f2d186194a (patch) | |
| tree | 62c32628a99e5e3ef755453f3c54ebfa17d25e6f /drivers/pinctrl/core.c | |
| parent | b56e23bf0c606b68df2919317f7065dabe3c4e86 (diff) | |
| download | linux-ecfe9a015d3e1e46504d5b3de7eef1f2d186194a.tar.xz | |
pinctrl: core: handle radix_tree_insert() errors in pinctrl_register_one_pin()
pinctrl_register_one_pin() doesn't check the result of radix_tree_insert()
despite they both may return a negative error code. Linus Walleij said he
has copied the radix tree code from kernel/irq/ where the functions calling
radix_tree_insert() are *void* themselves; I think it makes more sense to
propagate the errors from radix_tree_insert() upstream if we can do that...
Found by Linux Verification Center (linuxtesting.org) with the Svace static
analysis tool.
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Link: https://lore.kernel.org/r/20230719202253.13469-3-s.shtylyov@omp.ru
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/core.c')
| -rw-r--r-- | drivers/pinctrl/core.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c index 3c3fc4ae0f2f..e9dc9638120a 100644 --- a/drivers/pinctrl/core.c +++ b/drivers/pinctrl/core.c @@ -205,6 +205,7 @@ static int pinctrl_register_one_pin(struct pinctrl_dev *pctldev, const struct pinctrl_pin_desc *pin) { struct pin_desc *pindesc; + int error; pindesc = pin_desc_get(pctldev, pin->number); if (pindesc) { @@ -226,18 +227,25 @@ static int pinctrl_register_one_pin(struct pinctrl_dev *pctldev, } else { pindesc->name = kasprintf(GFP_KERNEL, "PIN%u", pin->number); if (!pindesc->name) { - kfree(pindesc); - return -ENOMEM; + error = -ENOMEM; + goto failed; } pindesc->dynamic_name = true; } pindesc->drv_data = pin->drv_data; - radix_tree_insert(&pctldev->pin_desc_tree, pin->number, pindesc); + error = radix_tree_insert(&pctldev->pin_desc_tree, pin->number, pindesc); + if (error) + goto failed; + pr_debug("registered pin %d (%s) on %s\n", pin->number, pindesc->name, pctldev->desc->name); return 0; + +failed: + kfree(pindesc); + return error; } static int pinctrl_register_pins(struct pinctrl_dev *pctldev, |