From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Guodong Liu <guodong.liu@mediatek.corp-partner.google.com>,
Zhiyong Tao <zhiyong.tao@mediatek.com>,
Chen-Yu Tsai <wenst@chromium.org>,
Linus Walleij <linus.walleij@linaro.org>,
Sasha Levin <sashal@kernel.org>,
sean.wang@kernel.org, matthias.bgg@gmail.com,
linux-mediatek@lists.infradead.org, linux-gpio@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH AUTOSEL 5.15 01/26] pinctrl: mediatek: fix global-out-of-bounds issue
Date: Mon, 27 Dec 2021 14:03:02 -0500 [thread overview]
Message-ID: <20211227190327.1042326-1-sashal@kernel.org> (raw)
From: Guodong Liu <guodong.liu@mediatek.corp-partner.google.com>
[ Upstream commit 2d5446da5acecf9c67db1c9d55ae2c3e5de01f8d ]
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: Sasha Levin <sashal@kernel.org>
---
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 45ebdeba985ae..12163d3c4bcb0 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);
--
2.34.1
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reply other threads:[~2021-12-27 19:03 UTC|newest]
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