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gpio: Verify validity of pin offsets when looking up names

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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>
This commit is contained in:
Samuel Holland 2021-09-11 17:05:51 -05:00 committed by Tom Rini
parent c5b68ef8af
commit 390ccffe07
1 changed files with 2 additions and 1 deletions
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3
drivers/gpio/gpio-uclass.c
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@ -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 (!strncasecmp(name, uc_priv->bank_name, len)) {
if (!strict_strtoul(name + len, 10, &offset)) if (!strict_strtoul(name + len, 10, &offset))
break; if (offset < uc_priv->gpio_count)
break;
} }
/* /*