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Josh Poimboeuf 55f856e640 x86/unwind: Fix guess-unwinder regression 
My attempt at fixing some KASAN false positive warnings was rather brain
dead, and it broke the guess unwinder.  With frame pointers disabled,
/proc/<pid>/stack is broken:

  # cat /proc/1/stack
  [<ffffffffffffffff>] 0xffffffffffffffff

Restore the code flow to more closely resemble its previous state, while
still using READ_ONCE_NOCHECK() macros to silence KASAN false positives.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: c2d75e03d630 ("x86/unwind: Prevent KASAN false positive warnings in guess unwinder")
Link: http://lkml.kernel.org/r/b824f92c2c22eca5ec95ac56bd2a7c84cf0b9df9.1480309971.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-11-28 07:47:54 +01:00
..
acpi
ACPI/PCI: pci_link: penalize SCI correctly
2016-10-24 14:18:14 +02:00
apic
x86/apic/uv: Silence a shift wrapping warning
2016-11-24 06:01:05 +01:00
cpu
x86/cpu: Deal with broken firmware (VMWare/XEN)
2016-11-09 21:05:01 +01:00
fpu
x86/fpu: Fix invalid FPU ptrace state after execve()
2016-11-21 10:38:35 +01:00
kprobes
kprobes: Unpoison stack in jprobe_return() for KASAN
2016-10-16 11:02:31 +02:00
.gitignore
…
alternative.c
x86/asm: Stop depending on ptrace.h in alternative.h
2016-04-29 11:56:40 +02:00
amd_gart_64.c
dma-mapping: use unsigned long for dma_attrs
2016-08-04 08:50:07 -04:00
amd_nb.c
Merge branch 'x86-headers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-08-01 14:23:42 -04:00
apb_timer.c
x86/apb_timer: Convert to hotplug state machine
2016-07-15 10:40:22 +02:00
aperture_64.c
param: convert some "on"/"off" users to strtobool
2016-03-17 15:09:34 -07:00
apm_32.c
x86: apm: avoid uninitialized data
2016-11-11 08:45:08 -08:00
asm-offsets_32.c
sched/x86: Rewrite the switch_to() code
2016-08-24 12:31:41 +02:00
asm-offsets_64.c
sched/x86: Rewrite the switch_to() code
2016-08-24 12:31:41 +02:00
asm-offsets.c
x86: Move thread_info into task_struct
2016-09-15 08:25:13 +02:00
audit_64.c
…
bootflag.c
x86: don't use module_init for non-modular core bootflag code
2015-06-16 14:12:34 -04:00
check.c
Linux 4.2-rc8
2015-08-25 09:59:19 +02:00
cpuid.c
new helpers: no_seek_end_llseek{,_size}()
2015-12-23 10:41:31 -05:00
crash_dump_32.c
…
crash_dump_64.c
…
crash.c
x86/panic: replace smp_send_stop() with kdump friendly version in panic path
2016-10-11 15:06:32 -07:00
devicetree.c
x86/cpufeature: Replace cpu_has_apic with boot_cpu_has() usage
2016-04-13 11:37:41 +02:00
doublefault.c
…
dumpstack_32.c
x86/dumpstack: Remove dump_trace() and related callbacks
2016-09-20 08:29:34 +02:00
dumpstack_64.c
x86/dumpstack: Remove dump_trace() and related callbacks
2016-09-20 08:29:34 +02:00
dumpstack.c
x86/dumpstack: Prevent KASAN false positive warnings
2016-11-18 09:38:00 +01:00
e820.c
x86/e820: Don't merge consecutive E820_PRAM ranges
2016-10-16 11:16:48 +02:00
early_printk.c
x86: Fix misspellings in comments
2016-02-24 08:44:58 +01:00
early-quirks.c
Merge tag 'drm-for-v4.9' of git://people.freedesktop.org/~airlied/linux
2016-10-11 18:12:22 -07:00
ebda.c
x86/boot: Simplify EBDA-vs-BIOS reservation logic
2016-07-22 11:46:01 +02:00
espfix_64.c
x86: get rid of superfluous __GFP_REPEAT
2016-06-24 17:23:52 -07:00
ftrace.c
ftrace/x86: Implement HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
2016-08-24 12:15:15 +02:00
head32.c
x86/boot: Run reserve_bios_regions() after we initialize the memory map
2016-08-11 11:14:59 +02:00
head64.c
x86/boot: Run reserve_bios_regions() after we initialize the memory map
2016-08-11 11:14:59 +02:00
head_32.S
x86/boot: Avoid warning for zero-filling .bss
2016-11-17 07:34:58 +01:00
head_64.S
Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
2016-10-14 14:26:58 -07:00
hpet.c
x86/hpet: Reduce HPET counter read contention
2016-09-09 15:16:19 +02:00
hw_breakpoint.c
x86/kernel: Audit and remove any unnecessary uses of module.h
2016-07-14 15:06:41 +02:00
i8237.c
…
i8253.c
x86/kernel: Audit and remove any unnecessary uses of module.h
2016-07-14 15:06:41 +02:00
i8259.c
x86/irq: Probe for PIC presence before allocating descs for legacy IRQs
2015-11-07 10:37:37 +01:00
io_delay.c
x86/kernel: Audit and remove any unnecessary uses of module.h
2016-07-14 15:06:41 +02:00
ioport.c
x86/iopl: Fix iopl capability check on Xen PV
2016-03-17 09:49:27 +01:00
irq_32.c
x86/kernel: Audit and remove any unnecessary uses of module.h
2016-07-14 15:06:41 +02:00
irq_64.c
x86: Move thread_info into task_struct
2016-09-15 08:25:13 +02:00
irq_work.c
treewide: Remove old email address
2015-11-23 09:44:58 +01:00
irq.c
x86/irq: Do not substract irq_tlb_count from irq_call_count
2016-08-11 11:14:59 +02:00
irqinit.c
x86/irq: Store irq descriptor in vector array
2015-08-06 00:14:59 +02:00
jump_label.c
x86/asm: Stop depending on ptrace.h in alternative.h
2016-04-29 11:56:40 +02:00
kdebugfs.c
x86/kernel: Audit and remove any unnecessary uses of module.h
2016-07-14 15:06:41 +02:00
kexec-bzimage64.c
x86/e820: Prepare e280 code for switch to dynamic storage
2016-09-21 15:02:12 +02:00
kgdb.c
sched/x86: Add 'struct inactive_task_frame' to better document the sleeping task stack frame
2016-08-24 12:27:41 +02:00
ksysfs.c
x86: Apply more __ro_after_init and const
2016-08-10 14:55:05 +02:00
kvm.c
Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-10-03 19:43:08 -07:00
kvmclock.c
Merge branch 'linus' into x86/asm, to pick up recent fixes
2016-09-15 08:24:53 +02:00
ldt.c
x86/mm: Factor out LDT init from context init
2016-02-18 19:46:31 +01:00
livepatch.c
livepatch/x86: apply alternatives and paravirt patches after relocations
2016-08-18 23:41:55 +02:00
machine_kexec_32.c
…
machine_kexec_64.c
kdump, vmcoreinfo: report memory sections virtual addresses
2016-10-11 15:06:33 -07:00
Makefile
Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
2016-10-14 14:26:58 -07:00
mcount_64.S
x86: Fix export for mcount and __fentry__
2016-10-26 12:38:17 +02:00
mmconf-fam10h_64.c
…
module.c
x86/asm: Stop depending on ptrace.h in alternative.h
2016-04-29 11:56:40 +02:00
mpparse.c
x86/mm/numa: Open code function early_get_boot_cpu_id()
2016-08-15 08:51:54 +02:00
msr.c
x86/cpufeature: Carve out X86_FEATURE_*
2016-01-30 11:22:17 +01:00
nmi_selftest.c
…
nmi.c
x86: include linux/ratelimit.h in nmi.c
2016-06-06 17:10:15 +02:00
paravirt_patch_32.c
x86, locking/spinlocks: Remove ticket (spin)lock implementation
2016-09-30 10:56:00 +02:00
paravirt_patch_64.c
x86, locking/spinlocks: Remove ticket (spin)lock implementation
2016-09-30 10:56:00 +02:00
paravirt-spinlocks.c
x86, locking/spinlocks: Remove ticket (spin)lock implementation
2016-09-30 10:56:00 +02:00
paravirt.c
x86/asm: Get rid of __read_cr4_safe()
2016-09-30 12:40:12 +02:00
pci-calgary_64.c
dma-mapping: use unsigned long for dma_attrs
2016-08-04 08:50:07 -04:00
pci-dma.c
dma-mapping: use unsigned long for dma_attrs
2016-08-04 08:50:07 -04:00
pci-iommu_table.c
x86: Fix non-static inlines
2016-04-16 13:21:40 +02:00
pci-nommu.c
dma-mapping: use unsigned long for dma_attrs
2016-08-04 08:50:07 -04:00
pci-swiotlb.c
dma-mapping: use unsigned long for dma_attrs
2016-08-04 08:50:07 -04:00
pcspeaker.c
…
perf_regs.c
…
platform-quirks.c
x86/boot: Reorganize and clean up the BIOS area reservation code
2016-07-21 10:11:57 +02:00
pmem.c
x86/kernel: Audit and remove any unnecessary uses of module.h
2016-07-14 15:06:41 +02:00
probe_roms.c
…
process_32.c
x86/asm: Get rid of __read_cr4_safe()
2016-09-30 12:40:12 +02:00
process_64.c
Merge branch 'mm-pkeys-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-10-10 11:01:51 -07:00
process.c
x86: use simpler API for random address requests
2016-10-11 15:06:32 -07:00
ptrace.c
Merge branch 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-10-03 17:29:01 -07:00
pvclock.c
KVM: x86: introduce get_kvmclock_ns
2016-09-20 09:26:15 +02:00
quirks.c
x86/quirks: Hide maybe-uninitialized warning
2016-10-25 11:45:13 +02:00
reboot_fixups_32.c
…
reboot.c
x86: Apply more __ro_after_init and const
2016-08-10 14:55:05 +02:00
relocate_kernel_32.S
…
relocate_kernel_64.S
…
resource.c
x86/e820: Prepare e280 code for switch to dynamic storage
2016-09-21 15:02:12 +02:00
rtc.c
char/genrtc: x86: remove remnants of asm/rtc.h
2016-06-04 00:20:07 +02:00
setup_percpu.c
Merge branch 'x86/mm' into x86/asm, to unify the two branches for simplicity
2016-09-08 08:41:52 +02:00
setup.c
x86/smpboot: Init apic mapping before usage
2016-10-29 14:00:46 +02:00
signal_compat.c
x86/signal: Remove bogus user_64bit_mode() check from sigaction_compat_abi()
2016-10-20 13:05:15 +02:00
signal.c
Merge branch 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-10-03 17:29:01 -07:00
smp.c
Linux 4.9-rc1
2016-10-16 11:31:39 +02:00
smpboot.c
x86/boot/smp: Don't try to poke disabled/non-existent APIC
2016-10-22 10:47:54 +02:00
stacktrace.c
x86/stacktrace: Convert save_stack_trace_*() to use the new unwinder
2016-09-20 08:29:33 +02:00
step.c
mm: replace access_process_vm() write parameter with gup_flags
2016-10-19 08:31:25 -07:00
sys_x86_64.c
x86: use simpler API for random address requests
2016-10-11 15:06:32 -07:00
sysfb_efi.c
Merge branch 'linus' into efi/core, to pick up fixes
2016-05-07 07:00:07 +02:00
sysfb_simplefb.c
x86/sysfb: Fix lfb_size calculation
2016-11-16 09:38:23 +01:00
sysfb.c
…
tboot.c
x86/e820: Prepare e280 code for switch to dynamic storage
2016-09-21 15:02:12 +02:00
tce_64.c
x86/cpufeature: Remove cpu_has_clflush
2016-03-31 13:35:09 +02:00
test_nx.c
x86/mm: Always enable CONFIG_DEBUG_RODATA and remove the Kconfig option
2016-02-22 08:51:38 +01:00
test_rodata.c
x86: Don't use module.h just for AUTHOR / LICENSE tags
2016-07-14 13:04:20 +02:00
time.c
…
tls.c
x86/tls: Synchronize segment registers in set_thread_area()
2016-04-29 11:56:42 +02:00
tls.h
…
topology.c
x86: Drop bogus __ref / __refdata annotations
2015-07-20 18:57:20 +02:00
trace_clock.c
x86/asm/tsc: Add rdtsc_ordered() and use it in trivial call sites
2015-07-06 15:23:29 +02:00
tracepoint.c
…
traps.c
x86/mm: Improve stack-overflow #PF handling
2016-09-08 08:47:20 +02:00
tsc_msr.c
x86/tsc_msr: Remove irqoff around MSR-based TSC enumeration
2016-07-11 21:30:12 +02:00
tsc_sync.c
x86/asm/tsc/sync: Use rdtsc_ordered() in check_tsc_warp() and drop extra barriers
2015-07-06 15:23:29 +02:00
tsc.c
x86/tsc: Add additional Intel CPU models to the crystal quirk list
2016-09-20 01:00:32 +02:00
unwind_frame.c
x86/unwind: Add new unwind interface and implementations
2016-09-20 08:29:33 +02:00
unwind_guess.c
x86/unwind: Fix guess-unwinder regression
2016-11-28 07:47:54 +01:00
uprobes.c
uprobes/x86: Fix RIP-relative handling of EVEX-encoded instructions
2016-08-12 08:29:24 +02:00
verify_cpu.S
x86/cpufeature: Carve out X86_FEATURE_*
2016-01-30 11:22:17 +01:00
vm86_32.c
x86, bitops: remove use of "sbb" to return CF
2016-06-08 12:41:20 -07:00
vmlinux.lds.S
nmi_backtrace: generate one-line reports for idle cpus
2016-10-07 18:46:30 -07:00
vsmp_64.c
x86: replace __init_or_module with __init in non-modular vsmp_64.c
2015-06-16 14:12:41 -04:00
x86_init.c
x86: Apply more __ro_after_init and const
2016-08-10 14:55:05 +02:00