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linux/arch/openrisc/include/asm
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Jiri Slaby 30d6e0a419 futex: Remove duplicated code and fix undefined behaviour 
There is code duplicated over all architecture's headers for
futex_atomic_op_inuser. Namely op decoding, access_ok check for uaddr,
and comparison of the result.

Remove this duplication and leave up to the arches only the needed
assembly which is now in arch_futex_atomic_op_inuser.

This effectively distributes the Will Deacon's arm64 fix for undefined
behaviour reported by UBSAN to all architectures. The fix was done in
commit 5f16a046f8 (arm64: futex: Fix undefined behaviour with
FUTEX_OP_OPARG_SHIFT usage). Look there for an example dump.

And as suggested by Thomas, check for negative oparg too, because it was
also reported to cause undefined behaviour report.

Note that s390 removed access_ok check in d12a29703 ("s390/uaccess:
remove pointless access_ok() checks") as access_ok there returns true.
We introduce it back to the helper for the sake of simplicity (it gets
optimized away anyway).

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Russell King <rmk+kernel@armlinux.org.uk>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> [s390]
Acked-by: Chris Metcalf <cmetcalf@mellanox.com> [for tile]
Reviewed-by: Darren Hart (VMware) <dvhart@infradead.org>
Reviewed-by: Will Deacon <will.deacon@arm.com> [core/arm64]
Cc: linux-mips@linux-mips.org
Cc: Rich Felker <dalias@libc.org>
Cc: linux-ia64@vger.kernel.org
Cc: linux-sh@vger.kernel.org
Cc: peterz@infradead.org
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: sparclinux@vger.kernel.org
Cc: Jonas Bonn <jonas@southpole.se>
Cc: linux-s390@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: linux-hexagon@vger.kernel.org
Cc: Helge Deller <deller@gmx.de>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: linux-snps-arc@lists.infradead.org
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: linux-xtensa@linux-xtensa.org
Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
Cc: openrisc@lists.librecores.org
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Stafford Horne <shorne@gmail.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Richard Henderson <rth@twiddle.net>
Cc: Chris Zankel <chris@zankel.net>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-parisc@vger.kernel.org
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: linux-alpha@vger.kernel.org
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: "David S. Miller" <davem@davemloft.net>
Link: http://lkml.kernel.org/r/20170824073105.3901-1-jslaby@suse.cz
2017-08-25 22:49:59 +02:00
..
bitops openrisc: add atomic bitops 2017-02-25 04:12:38 +09:00
asm-offsets.h
atomic.h openrisc: add optimized atomic operations 2017-02-25 04:14:06 +09:00
bitops.h openrisc: add atomic bitops 2017-02-25 04:12:38 +09:00
cache.h openrisc: Define __ro_after_init to avoid crash 2016-11-06 08:01:12 -08:00
cmpxchg.h openrisc: xchg: fix computed is not used warning 2017-03-16 00:12:56 +09:00
cpuinfo.h openrisc: add cache way information to cpuinfo 2017-02-06 21:50:41 +09:00
delay.h
dma-mapping.h openrisc: remove arch-specific dma_supported implementation 2017-06-28 06:54:44 -07:00
elf.h
fixmap.h openrisc: explicitly include linux/bug.h in asm/fixmap.h 2017-07-08 04:35:17 +09:00
futex.h futex: Remove duplicated code and fix undefined behaviour 2017-08-25 22:49:59 +02:00
io.h
irq.h
irqflags.h
Kbuild openrisc: move generic-y of exported headers to uapi/asm/Kbuild 2017-07-11 21:33:50 +09:00
linkage.h
mmu_context.h
mmu.h
page.h openrisc: drop wrongly typed definition of page_to_virt() 2016-04-22 10:08:34 +01:00
pgalloc.h openrisc: Consolidate setup to use memblock instead of bootmem 2016-12-12 23:10:00 +09:00
pgtable.h arch, mm: convert all architectures to use 5level-fixup.h 2017-03-09 11:48:47 -08:00
processor.h arch: remove unused macro/function thread_saved_pc() 2017-06-28 16:13:57 -07:00
ptrace.h
serial.h
spinlock.h
spr_defs.h openrisc: Fix the bitmask for the unit present register 2017-02-25 04:14:34 +09:00
spr.h
string.h openrisc: Add optimized memcpy routine 2017-02-25 04:14:36 +09:00
syscall.h
syscalls.h
thread_info.h
timex.h
tlb.h
tlbflush.h
uaccess.h kill strlen_user() 2017-05-15 23:40:22 -04:00
unaligned.h