diff options
| author | Guodong Liu <guodong.liu@mediatek.corp-partner.google.com> | 2021-11-10 15:19:00 +0800 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2021-11-24 09:38:44 +0100 |
| commit | 2d5446da5acecf9c67db1c9d55ae2c3e5de01f8d (patch) | |
| tree | 40e9a725f44e7babe3b49c0fdaa823fc50b18deb /drivers/pinctrl | |
| parent | 136057256686de39cc3a07c2e39ef6bc43003ff6 (diff) | |
| download | linux-2d5446da5acecf9c67db1c9d55ae2c3e5de01f8d.tar.gz | |
pinctrl: mediatek: fix global-out-of-bounds issue
When eint virtual eint number is greater than gpio number,
it maybe produce 'desc[eint_n]' size globle-out-of-bounds issue.
Signed-off-by: Guodong Liu <guodong.liu@mediatek.corp-partner.google.com>
Signed-off-by: Zhiyong Tao <zhiyong.tao@mediatek.com>
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://lore.kernel.org/r/20211110071900.4490-2-zhiyong.tao@mediatek.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl')
| -rw-r--r-- | drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c index 91553b2fc160..53779822348d 100644 --- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c @@ -285,8 +285,12 @@ static int mtk_xt_get_gpio_n(void *data, unsigned long eint_n, desc = (const struct mtk_pin_desc *)hw->soc->pins; *gpio_chip = &hw->chip; - /* Be greedy to guess first gpio_n is equal to eint_n */ - if (desc[eint_n].eint.eint_n == eint_n) + /* + * Be greedy to guess first gpio_n is equal to eint_n. + * Only eint virtual eint number is greater than gpio number. + */ + if (hw->soc->npins > eint_n && + desc[eint_n].eint.eint_n == eint_n) *gpio_n = eint_n; else *gpio_n = mtk_xt_find_eint_num(hw, eint_n); |