Arnd Bergmann e65d28d4e9 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 09:58:45 +02:00
..
vdso	csky: Add VDSO with GENERIC_GETTIMEOFDAY, GENERIC_TIME_VSYSCALL, HAVE_GENERIC_VDSO	2021-02-27 16:35:09 +08:00
Kbuild	csky: uaccess.h: Coding convention with asm generic	2021-04-28 23:02:23 +08:00
addrspace.h	csky: Fixup compile error	2021-02-27 22:04:14 +08:00
asid.h	csky: Fixup typos	2021-04-20 09:58:29 +08:00
barrier.h	csky: Fixup typos	2021-04-20 09:58:29 +08:00
bitops.h	csky: bitops: Remove duplicate __clear_bit define	2021-10-16 07:20:12 +08:00
bug.h	csky: Fixup compile error	2021-02-27 22:04:14 +08:00
cache.h	csky: Support icache flush without specific instructions	2020-02-21 15:43:24 +08:00
cacheflush.h	csky: Fixup compile error	2021-02-27 22:04:14 +08:00
checksum.h	csky: Fixup compile error	2021-02-27 22:04:14 +08:00
clocksource.h	csky: Add VDSO with GENERIC_GETTIMEOFDAY, GENERIC_TIME_VSYSCALL, HAVE_GENERIC_VDSO	2021-02-27 16:35:09 +08:00
cmpxchg.h	locking/atomic: csky: move to ARCH_ATOMIC	2021-05-26 13:20:51 +02:00
elf.h	csky: Fixup compile error	2021-02-27 22:04:14 +08:00
fixmap.h	csky: Fixup compile error	2021-02-27 22:04:14 +08:00
ftrace.h	csky: Fixup compile error	2021-02-27 22:04:14 +08:00
futex.h	csky: Fixup futex SMP implementation	2021-01-12 09:52:40 +08:00
highmem.h	csky: Fixup compile error	2021-02-27 22:04:14 +08:00
io.h	csky: Fixup compile error	2021-02-27 22:04:14 +08:00
irq_work.h	csky: Add irq_work support	2020-07-31 01:55:46 +00:00
irqflags.h	csky: IRQ handling	2018-10-26 00:54:22 +08:00
kprobes.h	csky: Add kprobes supported	2020-04-03 11:14:17 +08:00
memory.h	csky: Add memory layout 2.5G(user):1.5G(kernel)	2021-01-12 09:52:40 +08:00
mmu.h	csky: Fixup compile error	2021-02-27 22:04:14 +08:00
mmu_context.h	csky: Fixup compile error	2021-02-27 22:04:14 +08:00
page.h	csky: change a Kconfig symbol name to fix e1000 build error	2021-04-16 16:10:36 -07:00
pci.h	csky: Add PCI support	2020-02-21 15:43:25 +08:00
perf_event.h	csky: Fixup compile error	2021-02-27 22:04:14 +08:00
pgalloc.h	mm/thp: define default pmd_pgtable()	2021-07-01 11:06:03 -07:00
pgtable.h	mm: define default value for FIRST_USER_ADDRESS	2021-07-01 11:06:02 -07:00
probes.h	csky: Add kprobes supported	2020-04-03 11:14:17 +08:00
processor.h	csky: Fixup compile error	2021-02-27 22:04:14 +08:00
ptrace.h	csky: Fixup compile error	2021-02-27 22:04:14 +08:00
reg_ops.h	csky: Misc headers	2018-10-26 00:54:26 +08:00
seccomp.h	csky: Enable seccomp architecture tracking	2020-11-20 11:16:34 -08:00
segment.h	csky: uaccess.h: Coding convention with asm generic	2021-04-28 23:02:23 +08:00
shmparam.h	csky: Fixup compile error	2021-02-27 22:04:14 +08:00
smp.h	csky: CPU-hotplug supported for SMP	2018-12-31 23:03:53 +08:00
spinlock.h	csky: Cleanup asm/spinlock.h	2021-01-12 09:52:40 +08:00
spinlock_types.h	csky: Cleanup asm/spinlock.h	2021-01-12 09:52:40 +08:00
stackprotector.h	csky: Initial stack protector support	2020-02-21 15:43:24 +08:00
string.h	csky: Fixup compile error	2021-02-27 22:04:14 +08:00
switch_to.h	csky: Fixup compile error	2021-02-27 22:04:14 +08:00
syscall.h	arch/csky patches for 5.2-rc1	2019-05-08 11:41:08 -07:00
syscalls.h	csky: Fixup compile error	2021-02-27 22:04:14 +08:00
tcm.h	treewide: Convert macro and uses of __section(foo) to __section("foo")	2020-10-25 14:51:49 -07:00
thread_info.h	csky: Fixup compile error	2021-02-27 22:04:14 +08:00
tlb.h	csky: Fixup compile error	2021-02-27 22:04:14 +08:00
tlbflush.h	csky: Fixup compile error	2021-02-27 22:04:14 +08:00
traps.h	csky: Fixup compile error	2021-02-27 22:04:14 +08:00
uaccess.h	uaccess: fix integer overflow on access_ok()	2022-03-28 09:58:45 +02:00
unistd.h	csky: Fixup compile error	2021-02-27 22:04:14 +08:00
uprobes.h	csky: Add uprobes support	2020-04-03 11:37:51 +08:00
vdso.h	csky: Fixup typos	2021-04-20 09:58:29 +08:00
vmalloc.h	mm/vmalloc: Add empty <asm/vmalloc.h> headers and use them from <linux/vmalloc.h>	2019-12-10 10:12:55 +01:00