diff options
| author | Ma Ke <make24@iscas.ac.cn> | 2024-08-08 12:13:55 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-09-04 13:23:37 +0200 |
| commit | 6341c2856785dca7006820b127278058a180c075 (patch) | |
| tree | 2c82c2077c65e6d9c0e61557707f4bc08da650a8 /drivers/pinctrl | |
| parent | ce3c431c1f457e9aa66ee89d6b16364b41148a27 (diff) | |
pinctrl: single: fix potential NULL dereference in pcs_get_function()
commit 1c38a62f15e595346a1106025722869e87ffe044 upstream.
pinmux_generic_get_function() can return NULL and the pointer 'function'
was dereferenced without checking against NULL. Add checking of pointer
'function' in pcs_get_function().
Found by code review.
Cc: stable@vger.kernel.org
Fixes: 571aec4df5b7 ("pinctrl: single: Use generic pinmux helpers for managing functions")
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
Link: https://lore.kernel.org/20240808041355.2766009-1-make24@iscas.ac.cn
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/pinctrl')
| -rw-r--r-- | drivers/pinctrl/pinctrl-single.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-single.c b/drivers/pinctrl/pinctrl-single.c index cd23479f352a..d32d5c5e99bc 100644 --- a/drivers/pinctrl/pinctrl-single.c +++ b/drivers/pinctrl/pinctrl-single.c @@ -350,6 +350,8 @@ static int pcs_get_function(struct pinctrl_dev *pctldev, unsigned pin, return -ENOTSUPP; fselector = setting->func; function = pinmux_generic_get_function(pctldev, fselector); + if (!function) + return -EINVAL; *func = function->data; if (!(*func)) { dev_err(pcs->dev, "%s could not find function%i\n", |