Arnd Bergmann a1ad747fc1 uaccess: fix integer overflow on access_ok() ... commit 222ca305c9 upstream. Three architectures check the end of a user access against the address limit without taking a possible overflow into account. Passing a negative length or another overflow in here returns success when it should not. Use the most common correct implementation here, which optimizes for a constant 'size' argument, and turns the common case into a single comparison. Cc: stable@vger.kernel.org Fixes: da55128194 ("csky: User access") Fixes: f663b60f52 ("microblaze: Fix uaccess_ok macro") Fixes: 7567746e1c ("Hexagon: Add user access functions") Reported-by: David Laight <David.Laight@aculab.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-03-28 10:03:21 +02:00
..
configs	Merge branch 'akpm' (patches from Andrew)	2021-05-07 00:34:51 -07:00
include	uaccess: fix integer overflow on access_ok()	2022-03-28 10:03:21 +02:00
kernel	Merge branch 'signal-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2022-01-17 05:49:30 +02:00
lib	hexagon: export raw I/O routines for modules	2021-11-20 10:35:54 -08:00
mm	mm: remove redundant check about FAULT_FLAG_ALLOW_RETRY bit	2022-01-15 16:30:27 +02:00
Kbuild	hexagon: move core-y in arch/hexagon/Makefile to arch/hexagon/Kbuild	2021-05-26 23:11:47 +09:00
Kconfig	Tracing updates for 5.15:	2021-09-05 11:50:41 -07:00
Kconfig.debug	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
Makefile	hexagon: move core-y in arch/hexagon/Makefile to arch/hexagon/Kbuild	2021-05-26 23:11:47 +09:00