From: Guodong Liu guodong.liu@mediatek.corp-partner.google.com
stable inclusion from stable-v5.10.89 commit 441d3873664d170982922c5d2fc01fa89d9439ed bugzilla: 186140 https://gitee.com/openeuler/kernel/issues/I4S8HA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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commit 2d5446da5acecf9c67db1c9d55ae2c3e5de01f8d upstream.
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Chen Jun chenjun102@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c | 8 ++++++-- 1 file 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 10002b8497fe..fbb7807e0da2 100644 --- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c @@ -280,8 +280,12 @@ 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);