Jonas Malaco 9a5f471ae3 eeprom: ee1004: limit i2c reads to I2C_SMBUS_BLOCK_MAX ... commit c0689e46be upstream. Commit effa453168 ("i2c: i801: Don't silently correct invalid transfer size") revealed that ee1004_eeprom_read() did not properly limit how many bytes to read at once. In particular, i2c_smbus_read_i2c_block_data_or_emulated() takes the length to read as an u8. If count == 256 after taking into account the offset and page boundary, the cast to u8 overflows. And this is common when user space tries to read the entire EEPROM at once. To fix it, limit each read to I2C_SMBUS_BLOCK_MAX (32) bytes, already the maximum length i2c_smbus_read_i2c_block_data_or_emulated() allows. Fixes: effa453168 ("i2c: i801: Don't silently correct invalid transfer size") Cc: stable@vger.kernel.org Reviewed-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Jonas Malaco <jonas@protocubo.io> Link: https://lore.kernel.org/r/20220203165024.47767-1-jonas@protocubo.io Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-02-16 12:56:33 +01:00
..
Kconfig	nvmem: prepare basics for FRAM support	2021-06-11 12:23:10 +02:00
Makefile	eeprom: New ee1004 driver for DDR4 memory	2018-10-15 20:51:46 +02:00
at24.c	misc: eeprom: at24: Always append device id even if label property is set.	2021-07-01 18:49:37 +02:00
at25.c	misc: at25: Make driver OF independent again	2022-01-27 11:04:09 +01:00
digsy_mtc_eeprom.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
ee1004.c	eeprom: ee1004: limit i2c reads to I2C_SMBUS_BLOCK_MAX	2022-02-16 12:56:33 +01:00
eeprom.c	misc: eeprom: use helper to get i2c_client from kobj	2020-09-21 11:45:43 +02:00
eeprom_93cx6.c	misc: eeprom: eeprom_93cx6: Repair function arg descriptions	2020-06-29 18:45:52 +02:00
eeprom_93xx46.c	eeprom: 93xx46: fix MODULE_DEVICE_TABLE	2021-10-15 10:54:02 +02:00
idt_89hpesx.c	eeprom: idt_89hpesx: use SPDX-License-Identifier	2021-06-09 18:39:40 +02:00
max6875.c	misc: eeprom: max6875: convert to i2c_new_dummy_device	2019-07-25 10:06:54 +02:00