This is a note to let you know that I've just added the patch titled
eeprom: at24: check at24_read/write arguments
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
eeprom-at24-check-at24_read-write-arguments.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From d9bcd462daf34aebb8de9ad7f76de0198bb5a0f0 Mon Sep 17 00:00:00 2001
From: Heiner Kallweit <hkallweit1@xxxxxxxxx>
Date: Fri, 24 Nov 2017 07:47:50 +0100
Subject: eeprom: at24: check at24_read/write arguments
From: Heiner Kallweit <hkallweit1@xxxxxxxxx>
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@xxxxxxxxx>
Signed-off-by: Bartosz Golaszewski <brgl@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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.
Patches currently in stable-queue which might be from hkallweit1@xxxxxxxxx are
queue-4.9/eeprom-at24-fix-reading-from-24mac402-24mac602.patch
queue-4.9/eeprom-at24-check-at24_read-write-arguments.patch