4.14-stable review patch. If anyone has any objections, please let me know.
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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: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/misc/eeprom/at24.c | 6 ++++++ 1 file changed, 6 insertions(+)
--- a/drivers/misc/eeprom/at24.c +++ b/drivers/misc/eeprom/at24.c @@ -507,6 +507,9 @@ static int at24_read(void *priv, unsigne 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, unsign 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.