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Luck, Tony c76f39bddb ia64: fix futex_atomic_cmpxchg_inatomic() 
Michel Lespinasse cleaned up the futex calling conventions in commit
37a9d912b2 ("futex: Sanitize cmpxchg_futex_value_locked API").

But the ia64 implementation was subtly broken.  Gcc does not know that
register "r8" will be updated by the fault handler if the cmpxchg
instruction takes an exception.  So it feels safe in letting the
initialization of r8 slide to after the cmpxchg.  Result: we always
return 0 whether the user address faulted or not.

Fix by moving the initialization of r8 into the __asm__ code so gcc
won't move it.

Reported-by: <emeric.maschino@gmail.com>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=42757
Tested-by: <emeric.maschino@gmail.com>
Acked-by: Michel Lespinasse <walken@google.com>
Cc: stable@vger.kernel.org # v2.6.39+
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2012-04-16 18:30:01 -07:00
..
native ia64/pv_ops: paravirtualize gate.S. 2009-03-26 11:01:46 -07:00
sn Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
uv Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
xen xen/enlighten: Expose MWAIT and MWAIT_LEAF if hypervisor OKs it. 2012-03-10 12:44:44 -05:00
Kbuild archs: replace unifdef-y with header-y 2010-08-14 22:26:51 +02:00
acpi-ext.h ACPI: remove private acpica headers from driver files 2008-12-31 01:15:22 -05:00
acpi.h Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
agp.h agp: kill phys_to_gart() and gart_to_phys() 2009-08-03 09:05:00 +01:00
asm-offsets.h kbuild: move asm-offsets.h to include/generated 2009-12-12 13:08:14 +01:00
asmmacro.h Rename .data..patch.XXX to .data..patch.XXX. 2010-03-03 11:25:59 +01:00
atomic.h Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
auxvec.h Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
barrier.h Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
bitops.h asm-generic: add another generic ext2 atomic bitops 2011-07-26 16:49:46 -07:00
bitsperlong.h asm-generic: introduce asm/bitsperlong.h 2009-06-11 21:02:14 +02:00
break.h ia64/xen: reserve "break" numbers used for xen hypercalls. 2008-10-17 09:52:52 -07:00
bug.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
bugs.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
byteorder.h byteorder: make swab.h include asm/swab.h like a regular header 2009-01-14 19:56:50 -08:00
cache.h Rename .data.read_mostly to .data..read_mostly. 2010-03-03 11:26:00 +01:00
cacheflush.h block: add helpers to run flush_dcache_page() against a bio and a request's pages 2009-11-26 09:16:19 +01:00
checksum.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
clocksource.h clocksource: Change __ARCH_HAS_CLOCKSOURCE_DATA to a CONFIG option 2011-07-21 13:34:05 -07:00
cmpxchg.h ia64: populate the cmpxchg header with appropriate code 2012-04-13 13:15:16 -04:00
cpu.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
cputime.h Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2012-01-06 08:44:54 -08:00
current.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
cyclone.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
delay.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
device.h iommu: Rename the DMAR and INTR_REMAP config options 2011-09-21 10:22:03 +02:00
div64.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
dma-mapping.h X86 & IA64: adapt for dma_map_ops changes 2012-03-28 16:36:31 +02:00
dma.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
dmi.h include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
elf.h elf coredump: replace ELF_CORE_EXTRA_* macros by functions 2010-03-06 11:26:45 -08:00
emergency-restart.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
errno.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
esi.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
exec.h Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
fb.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
fcntl.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
fpswa.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
fpu.h Revert "Neither asm/types.h nor linux/types.h is required for arch/ia64/include/asm/fpu.h" 2009-07-17 06:35:05 -07:00
ftrace.h [IA64] sanity in #include files. Move fnptr to types.h 2010-01-06 15:52:35 -08:00
futex.h ia64: fix futex_atomic_cmpxchg_inatomic() 2012-04-16 18:30:01 -07:00
gcc_intrin.h [IA64] Convert ia64 to use int-ll64.h 2009-06-17 09:33:49 -07:00
gpio.h [IA64] Hook up gpiolib support 2011-06-01 13:44:06 -07:00
hardirq.h [IA64] Move local_softirq_pending() definition 2010-10-19 13:31:11 +02:00
hpsim.h hpsim, initialize chip for assigned irqs 2012-03-08 12:26:30 -08:00
hugetlb.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
hw_irq.h ia64: Remove redundant declaration of irq_desc[] 2011-03-29 14:48:05 +02:00
ia64regs.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
idle.h [IA64] xen_domu_defconfig: fix build issues/warnings 2009-05-05 11:43:13 -07:00
intel_intrin.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
intrinsics.h ia64: populate the cmpxchg header with appropriate code 2012-04-13 13:15:16 -04:00
io.h Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
ioctl.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
ioctls.h ioctl: Use asm-generic/ioctls.h on ia64 (enables termiox) 2010-10-22 10:20:00 -07:00
iommu.h iommu: Add option to group multi-function devices 2011-11-15 12:22:31 +01:00
iommu_table.h ia64, iommu: Add a dummy iommu_table.h file in IA64. 2010-10-08 13:11:11 -07:00
iosapic.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
ipcbuf.h consolidate a bunch of ipcbuf.h instances 2012-01-03 22:55:18 -05:00
irq.h ia64: move nr-irqs.h to include/generated 2009-12-12 13:08:14 +01:00
irq_regs.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
irqflags.h Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
kdebug.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
kexec.h Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
kmap_types.h kmap_types: make most arches use generic header file 2009-06-16 19:47:51 -07:00
kprobes.h [IA64] sanity in #include files. Move fnptr to types.h 2010-01-06 15:52:35 -08:00
kregs.h [IA64] Fix annoying IA64_TR_ALLOC_MAX message. 2008-10-17 13:47:53 -07:00
kvm.h KVM: provide synchronous registers in kvm_run 2012-03-05 14:52:22 +02:00
kvm_host.h KVM: Introduce kvm_memory_slot::arch and move lpage_info into it 2012-03-08 14:10:22 +02:00
kvm_para.h KVM: Add __KERNEL__ guards to exported headers 2009-09-10 10:46:48 +03:00
libata-portmap.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
linkage.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
local.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
local64.h arch: Implement local64_t 2010-06-09 11:12:36 +02:00
machvec.h Merge branch 'linus' into core/iommu 2009-01-16 10:09:10 +01:00
machvec_dig.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
machvec_dig_vtd.h remove dma operations in struct ia64_machine_vector 2009-01-06 14:06:50 +01:00
machvec_hpsim.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
machvec_hpzx1.h remove dma operations in struct ia64_machine_vector 2009-01-06 14:06:50 +01:00
machvec_hpzx1_swiotlb.h remove hwsw_dma_ops 2009-01-06 14:06:52 +01:00
machvec_init.h [IA64] SN specific version of dma_get_required_mask() 2009-01-15 10:42:16 -08:00
machvec_sn2.h Merge branch 'linus' into core/iommu 2009-01-16 10:09:10 +01:00
machvec_uv.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
machvec_xen.h ia64/xen: define xen machine vector for domU. 2008-10-17 10:08:56 -07:00
mc146818rtc.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
mca.h [IA64] Save I-resources to ia64_sal_os_state 2009-12-14 16:37:58 -08:00
mca_asm.h Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
meminit.h ia64: don't alias VMALLOC_END to vmalloc_end 2009-10-02 13:28:55 +09:00
mman.h mm: remove duplicate asm/mman.h files 2009-09-22 07:17:42 -07:00
mmu.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
mmu_context.h cpumask: use mm_cpumask() wrapper: ia64 2009-03-16 14:12:48 +10:30
mmzone.h [IA64] removing redundant ifdef 2010-05-18 14:45:52 -07:00
module.h ia64/pv_ops/bp/module: support binary patching for kernel module. 2009-03-26 11:02:51 -07:00
msgbuf.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
msidef.h ia64: Move the macro definitions related to MSI to one header file. 2009-03-24 11:03:12 +02:00
mutex.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
nodedata.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
numa.h hugetlb: add generic definition of NUMA_NO_NODE 2009-12-15 08:53:12 -08:00
page.h Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
pal.h Fix common misspellings 2011-03-31 11:26:23 -03:00
param.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
paravirt.h static keys: Introduce 'struct static_key', static_key_true()/false() and static_key_slow_[inc|dec]() 2012-02-24 10:05:59 +01:00
paravirt_patch.h ia64/pv_op/binarypatch: add helper functions to support binary patching for paravirt_ops. 2009-03-26 11:02:31 -07:00
paravirt_privop.h [IA64] fix allmodconfig compilation breakage. 2009-04-20 09:46:29 -07:00
parport.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
patch.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
pci.h Disintegrate and delete asm/system.h 2012-03-28 15:58:21 -07:00
percpu.h Merge branch 'for-35' of git://repo.or.cz/linux-kbuild 2010-06-01 08:55:52 -07:00
perfmon.h fix typos 'comamnd' -> 'command' in comments 2011-02-02 11:31:21 +01:00
perfmon_default_smpl.h Fix common misspellings 2011-03-31 11:26:23 -03:00
pgalloc.h mm: Pass virtual address to [__]p{te,ud,md}_free_tlb() 2009-07-27 12:10:38 -07:00
pgtable.h Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
poll.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
posix_types.h ia64: Use generic posix_types.h 2012-02-14 12:01:28 -08:00
processor.h Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
ptrace.h Audit: push audit success and retcode into arch ptrace.h 2012-01-17 16:16:56 -05:00
ptrace_offsets.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
pvclock-abi.h ia64/xen: add a necessary header file to compile include/xen/interface/xen.h 2008-10-17 09:57:28 -07:00
resource.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
rse.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
rwsem.h rwsem: Move duplicate function prototypes to linux/rwsem.h 2011-01-27 12:30:39 +01:00
sal.h Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
scatterlist.h remove needless ISA_DMA_THRESHOLD 2010-08-07 18:15:50 +02:00
sections.h [IA64] Put the space for cpu0 per-cpu area into .data section 2008-09-29 16:39:19 -07:00
segment.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
sembuf.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
serial.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
setup.h Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
shmbuf.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
shmparam.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
sigcontext.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
siginfo.h Add _addr_lsb field to ia64 siginfo 2010-10-12 09:37:10 +02:00
signal.h asm-generic: rename termios.h, signal.h and mman.h 2009-06-11 21:01:52 +02:00
smp.h cpumask: remove arch_send_call_function_ipi 2009-09-24 09:34:47 +09:30
socket.h net: Add framework to allow sending packets with customized CRC. 2012-02-24 01:37:35 -08:00
sockios.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
sparsemem.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
spinlock.h Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
spinlock_types.h locking: Convert raw_rwlock to arch_rwlock 2009-12-14 23:55:32 +01:00
stat.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
statfs.h IA64: Use <asm-generic/statfs.h> 2008-09-04 09:46:13 +01:00
string.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
swab.h headers_check fix: ia64, swab.h 2009-02-01 11:01:25 +05:30
swiotlb.h swiotlb: Remove duplicate swiotlb_force extern declarations 2009-11-15 09:03:10 +01:00
switch_to.h Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
sync_bitops.h ia64/xen: introduce sync bitops which is necessary for ia64/xen support. 2008-10-17 09:53:33 -07:00
syscall.h [IA64] Remove COMPAT_IA32 support 2010-02-08 10:42:17 -08:00
termbits.h tty: Add EXTPROC support for LINEMODE 2010-08-10 13:47:39 -07:00
termios.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
thread_info.h freezer: remove now unused TIF_FREEZE 2011-11-21 12:32:25 -08:00
timex.h ia64/pv_ops/pv_time_ops: add sched_clock hook. 2009-03-26 10:50:42 -07:00
tlb.h ia64: mmu_gather rework 2011-05-25 08:39:15 -07:00
tlbflush.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
topology.h numa: ia64: use generic percpu var numa_node_id() implementation 2010-05-27 09:12:57 -07:00
types.h consolidate umode_t declarations 2012-01-03 22:55:17 -05:00
uaccess.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
ucontext.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
unaligned.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
uncached.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
unistd.h ia64: Add accept4() syscall 2012-01-09 12:55:10 -08:00
unwind.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
user.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
ustack.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
vga.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
xor.h [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00