From 390ccffe07c45a3ad584ee6199cc1e63d07981ee Mon Sep 17 00:00:00 2001
From: Samuel Holland <samuel@sholland.org>
Date: Sat, 11 Sep 2021 17:05:51 -0500
Subject: [PATCH] gpio: Verify validity of pin offsets when looking up names
Translation of a pin name to a device+offset should fail if the offset
is larger than the number of pins in the GPIO bank.
Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
---
drivers/gpio/gpio-uclass.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpio/gpio-uclass.c b/drivers/gpio/gpio-uclass.c
index bb2f23241e..45a7f8def4 100644
--- a/drivers/gpio/gpio-uclass.c
+++ b/drivers/gpio/gpio-uclass.c
@@ -141,7 +141,8 @@ int dm_gpio_lookup_name(const char *name, struct gpio_desc *desc)
if (!strncasecmp(name, uc_priv->bank_name, len)) {
if (!strict_strtoul(name + len, 10, &offset))
- break;
+ if (offset < uc_priv->gpio_count)
+ break;
}
/*
--
2.39.5