diff options
| author | Heiner Kallweit <hkallweit1@gmail.com> | 2017-11-24 07:47:50 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-05 11:26:33 +0100 |
| commit | 52d9bb958f080f0a548139676dbf6a87a40af2a0 (patch) | |
| tree | 3ac5f029aea5fb9256d8799742611f5ba46c0419 /drivers/misc/eeprom/at24.c | |
| parent | 656155d07658e84ac6ab6f6eceac67b807d6fedb (diff) | |
eeprom: at24: check at24_read/write arguments
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/eeprom/at24.c')
| -rw-r--r-- | drivers/misc/eeprom/at24.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c index e0d018e8bb8e..372b2060fbba 100644 --- a/drivers/misc/eeprom/at24.c +++ b/drivers/misc/eeprom/at24.c @@ -507,6 +507,9 @@ 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; + /* * Read data from chip, protecting against concurrent updates * from this host, but not from other I2C masters. @@ -539,6 +542,9 @@ 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; + /* * Write data to chip, protecting against concurrent updates * from this host, but not from other I2C masters. |