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
..
boot	microblaze: timer: Remove unused properties	2021-10-26 07:37:18 +02:00
configs	microblaze: Remove noMMU code	2020-11-26 16:39:35 +01:00
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	microblaze: use generic strncpy/strnlen from_user	2021-07-27 23:01:13 +02:00
mm	mm: remove redundant check about FAULT_FLAG_ALLOW_RETRY bit	2022-01-15 16:30:27 +02:00
pci	PCI: Rename pcibios_add_device() to pcibios_device_add()	2021-09-21 15:26:09 -05:00
Kbuild	kbuild: use more subdir- for visiting subdirectories while cleaning	2021-10-24 13:49:46 +09:00
Kconfig	tracing: Refactor TRACE_IRQFLAGS_SUPPORT in Kconfig	2021-08-16 11:37:21 -04:00
Kconfig.debug	tracing: Refactor TRACE_IRQFLAGS_SUPPORT in Kconfig	2021-08-16 11:37:21 -04:00
Kconfig.platform	docs: kbuild: convert docs to ReST and rename to *.rst	2019-06-14 14:21:21 -06:00
Makefile	microblaze: use built-in function to get CPU_{MAJOR,MINOR,REV}	2022-01-08 18:28:21 +09:00