| From | Ben Hutchings <> | Date | Wed, 28 Feb 2018 15:20:18 +0000 | Subject | [PATCH 3.16 032/254] eeprom: at24: check at24_read/write arguments |
| |
3.16.55-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Heiner Kallweit <hkallweit1@gmail.com>
commit d9bcd462daf34aebb8de9ad7f76de0198bb5a0f0 upstream.
So far we completely rely on the caller to provide valid arguments. To be on the safe side perform an own sanity check.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> --- drivers/misc/eeprom/at24.c | 6 ++++++ 1 file changed, 6 insertions(+)
--- a/drivers/misc/eeprom/at24.c +++ b/drivers/misc/eeprom/at24.c @@ -274,6 +274,9 @@ static ssize_t at24_read(struct at24_dat if (unlikely(!count)) return count; + if (off + count > at24->chip.byte_len) + return -EINVAL; + /* * Read data from chip, protecting against concurrent updates * from this host, but not from other I2C masters. @@ -396,6 +399,9 @@ static ssize_t at24_write(struct at24_da if (unlikely(!count)) return count; + if (off + count > at24->chip.byte_len) + return -EINVAL; + /* * Write data to chip, protecting against concurrent updates * from this host, but not from other I2C masters.
|