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eeprom: at24: check at24_read/write arguments

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So far we completely rely on the caller to provide valid arguments.
To be on the safe side perform an own sanity check.

Cc: stable@vger.kernel.org
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
This commit is contained in:
Heiner Kallweit 2017-11-24 07:47:50 +01:00 committed by Bartosz Golaszewski
parent 644a1f19c6
commit d9bcd462da
1 changed files with 6 additions and 0 deletions
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6
drivers/misc/eeprom/at24.c
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@ -569,6 +569,9 @@ static int at24_read(void *priv, unsigned int off, void *val, size_t count)
if (unlikely(!count))
return count;
if (off + count > at24->chip.byte_len)
return -EINVAL;
client = at24_translate_offset(at24, &off);
ret = pm_runtime_get_sync(&client->dev);
@ -614,6 +617,9 @@ static int at24_write(void *priv, unsigned int off, void *val, size_t count)
if (unlikely(!count))
return -EINVAL;
if (off + count > at24->chip.byte_len)
return -EINVAL;
client = at24_translate_offset(at24, &off);
ret = pm_runtime_get_sync(&client->dev);