[PATCH 1/3] gpio: Verify validity of pin offsets when looking up names
Samuel Holland
samuel at sholland.org
Sun Sep 12 00:05:51 CEST 2021
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 at sholland.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 8c77777dbe3..57e87960ee4 100644
--- a/drivers/gpio/gpio-uclass.c
+++ b/drivers/gpio/gpio-uclass.c
@@ -140,7 +140,8 @@ 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;
}
/*
--
2.31.1
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