Andy Lutomirski 98f30b1207 x86/dumpstack/64: Handle faults when printing the "Stack: " part of an OOPS ...

If we overflow the stack into a guard page, we'll recursively fault
when trying to dump the contents of the guard page.  Use
probe_kernel_address() so we can recover if this happens.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/e626d47a55d7b04dcb1b4d33faa95e8505b217c8.1468527351.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2016-07-15 10:26:27 +02:00

..

acpi

Merge tag 'acpi-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

2016-05-16 19:41:41 -07:00

apic

x86/ioapic: Fix incorrect pointers in ioapic_setup_resources()

2016-06-10 14:45:54 +02:00

cpu

Merge branch 'linus' into x86/asm, to pick up fixes

2016-06-11 11:25:50 +02:00

fpu

x86/fpu: Get rid of x87 math exception helpers

2016-04-13 11:37:44 +02:00

kprobes

kprobes/x86: Clear TF bit in fault on single-stepping

2016-06-14 12:00:54 +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

…

amd_nb.c

x86/amd_nb: Fix boot crash on non-AMD systems

2016-07-01 09:35:35 +02:00

apb_timer.c

x86/apb/timer: Use proper mask to modify hotplug action

2016-03-19 13:40:08 +01:00

aperture_64.c

param: convert some "on"/"off" users to strtobool

2016-03-17 15:09:34 -07:00

apm_32.c

x86/apm32: Remove paravirt_enabled() use

2016-04-22 10:29:03 +02:00

asm-offsets_32.c

x86/entry/32: Simplify and fix up the SYSENTER stack #DB/NMI fixup

2016-03-10 09:48:14 +01:00

asm-offsets_64.c

x86/syscalls: Add syscall entry qualifiers

2016-01-29 09:46:38 +01:00

asm-offsets.c

x86/boot: Move compressed kernel to the end of the decompression buffer

2016-04-29 11:03:29 +02:00

audit_64.c

x86: hook up execveat system call

2014-12-13 12:42:51 -08:00

bootflag.c

x86: don't use module_init for non-modular core bootflag code

2015-06-16 14:12:34 -04:00

check.c

Merge tag 'v4.2-rc8' into x86/mm, before applying new changes

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/kexec: Remove walk_iomem_res() call with GART type

2016-01-30 09:49:59 +01:00

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: avoid avoid passing around 'thread_info' in stack dumping code

2016-06-23 12:20:01 -07:00

dumpstack_64.c

x86/dumpstack/64: Handle faults when printing the "Stack: " part of an OOPS

2016-07-15 10:26:27 +02:00

dumpstack.c

x86/dumpstack: Try harder to get a call trace on stack overflow

2016-07-15 10:26:26 +02:00

e820.c

Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-03-15 09:32:27 -07:00

early_printk.c

x86: Fix misspellings in comments

2016-02-24 08:44:58 +01:00

early-quirks.c

Merge tag 'v4.4-rc2' into drm-intel-next-queued

2015-11-23 09:04:05 +01:00

ebda.c

x86/init: Rename EBDA code file

2016-04-22 10:29:07 +02:00

espfix_64.c

x86: get rid of superfluous __GFP_REPEAT

2016-06-24 17:23:52 -07:00

ftrace.c

Merge tag 'trace-v4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

2016-03-24 10:52:25 -07:00

head32.c

x86/rtc: Replace paravirt rtc check with platform legacy quirk

2016-04-22 10:29:01 +02:00

head64.c

x86/rtc: Replace paravirt rtc check with platform legacy quirk

2016-04-22 10:29:01 +02:00

head_32.S

Merge branch 'x86/urgent' into x86/asm, to refresh the tree

2016-04-29 11:55:04 +02:00

head_64.S

x86/asm: Make sure verify_cpu() has a good stack

2016-04-13 11:52:19 +02:00

hpet.c

Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-05-16 16:40:14 -07:00

hw_breakpoint.c

x86/cpufeature: Remove unused and seldomly used cpu_has_xx macros

2015-12-19 11:49:55 +01:00

i386_ksyms_32.c

x86/hweight: Get rid of the special calling convention

2016-06-08 15:01:02 +02:00

i8237.c

…

i8253.c

clockevents/drivers/i8253: Migrate to new 'set-state' interface

2015-08-10 11:40:30 +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

…

ioport.c

x86/iopl: Fix iopl capability check on Xen PV

2016-03-17 09:49:27 +01:00

irq_32.c

x86: fix up a few misc stack pointer vs thread_info confusions

2016-06-24 16:55:53 -07:00

irq_64.c

x86/irq: Drop unlikely before IS_ERR_OR_NULL

2015-10-01 11:08:56 +02:00

irq_work.c

treewide: Remove old email address

2015-11-23 09:44:58 +01:00

irq.c

x86/irq: Call irq_force_move_complete with irq descriptor

2016-01-15 13:44:01 +01:00

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

…

kexec-bzimage64.c

KEYS: Generalise system_verify_data() to provide access to internal content

2016-04-06 16:14:24 +01:00

kgdb.c

x86/asm: Stop depending on ptrace.h in alternative.h

2016-04-29 11:56:40 +02:00

ksysfs.c

…

kvm.c

Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-05-16 15:54:01 -07:00

kvmclock.c

x86: Fix misspellings in comments

2016-02-24 08:44:58 +01:00

ldt.c

x86/mm: Factor out LDT init from context init

2016-02-18 19:46:31 +01:00

machine_kexec_32.c

x86, irq: Move IOAPIC related declarations from hw_irq.h into io_apic.h

2014-12-16 14:08:17 +01:00

machine_kexec_64.c

kexec: provide arch_kexec_protect(unprotect)_crashkres()

2016-05-23 17:04:14 -07:00

Makefile

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching

2016-05-17 17:11:27 -07:00

mcount_64.S

ftrace/x86: Set ftrace_stub to weak to prevent gcc from using short jumps to it

2016-05-20 13:28:40 -04:00

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/cpufeature: Use enum cpuid_leafs instead of magic numbers

2016-02-01 10:46:48 +01:00

msr.c

x86/cpufeature: Carve out X86_FEATURE_*

2016-01-30 11:22:17 +01:00

nmi_selftest.c

…

nmi.c

x86/nmi: Mark 'ignore_nmis' as __read_mostly

2016-03-08 12:48:19 +01:00

paravirt_patch_32.c

x86/paravirt: Remove the unused irq_enable_sysexit pv op

2015-11-23 10:48:16 +01:00

paravirt_patch_64.c

x86/entry, x86/paravirt: Remove the unused usergs_sysret32 PV op

2015-11-23 10:48:16 +01:00

paravirt-spinlocks.c

locking/pvqspinlock: Rename QUEUED_SPINLOCK to QUEUED_SPINLOCKS

2015-05-11 09:52:09 +02:00

paravirt.c

Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-05-16 15:54:01 -07:00

pci-calgary_64.c

x86/platform/calgary: Constify cal_chipset_ops structures

2015-11-29 08:50:58 +01:00

pci-dma.c

mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd

2015-11-06 17:50:42 -08:00

pci-iommu_table.c

x86: Fix non-static inlines

2016-04-16 13:21:40 +02:00

pci-nommu.c

…

pci-swiotlb.c

x86/mm/64: Enable SWIOTLB if system has SRAT memory regions above MAX_DMA32_PFN

2015-12-06 12:46:31 +01:00

pcspeaker.c

…

perf_regs.c

perf/x86/64: Report regs_user->ax too in get_regs_user()

2015-04-11 13:08:53 +02:00

platform-quirks.c

x86/init: Disable pnpbios and rtc for X86_SUBARCH_CE4100

2016-04-22 10:29:09 +02:00

pmem.c

x86, kexec, nvdimm: Use walk_iomem_res_desc() for iomem search

2016-01-30 09:49:59 +01:00

probe_roms.c

…

process_32.c

sched/core, sched/x86: Kill thread_info::saved_preempt_count

2015-10-06 17:08:18 +02:00

process_64.c

x86/fsgsbase/64: Use TASK_SIZE_MAX for FSBASE/GSBASE upper limits

2016-05-20 09:10:03 +02:00

process.c

exit_thread: accept a task parameter to be exited

2016-05-20 17:58:30 -07:00

ptrace.c

x86/fsgsbase/64: Use TASK_SIZE_MAX for FSBASE/GSBASE upper limits

2016-05-20 09:10:03 +02:00

pvclock.c

pvclock: Get rid of __pvclock_read_cycles in function pvclock_read_flags

2016-06-27 15:12:15 +02:00

quirks.c

timers/x86/hpet: Type adjustments

2015-10-21 11:17:32 +02:00

reboot_fixups_32.c

…

reboot.c

x86/efi: Force EFI reboot to process pending capsules

2016-04-28 11:34:04 +02:00

relocate_kernel_32.S

x86/asm: Optimize unnecessarily wide TEST instructions

2015-03-07 11:12:43 +01:00

relocate_kernel_64.S

x86/asm: Replace "MOVQ $imm, %reg" with MOVL

2015-04-01 13:17:39 +02:00

resource.c

…

rtc.c

x86/init: Disable pnpbios and rtc for X86_SUBARCH_CE4100

2016-04-22 10:29:09 +02:00

setup_percpu.c

…

setup.c

ACPI / x86: Cleanup initrd related code

2016-04-18 23:59:09 +02:00

signal_compat.c

x86/signals: Add build-time checks to the siginfo compat code

2016-06-14 12:19:24 +02:00

signal.c

Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-05-16 15:15:17 -07:00

smp.c

x86/smp: Remove single IPI wrapper

2015-11-05 13:07:54 +01:00

smpboot.c

Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-05-16 15:15:17 -07:00

stacktrace.c

perf: generalize perf_callchain

2016-02-20 00:21:44 -05:00

step.c

Merge branch 'x86/urgent' into x86/asm to fix up conflicts and to pick up fixes

2015-08-18 09:39:47 +02:00

sys_x86_64.c

x86/mm: Improve AMD Bulldozer ASLR workaround

2015-03-31 10:01:17 +02:00

sysfb_efi.c

Merge branch 'linus' into efi/core, to pick up fixes

2016-05-07 07:00:07 +02:00

sysfb_simplefb.c

…

sysfb.c

…

tboot.c

x86/tboot: Remove paravirt_enabled() use

2016-04-22 10:29:04 +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/mm: Always enable CONFIG_DEBUG_RODATA and remove the Kconfig option

2016-02-22 08:51:38 +01:00

time.c

x86/asm/entry: Change all 'user_mode_vm()' calls to 'user_mode()'

2015-03-23 11:14:17 +01:00

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/entry/traps: Don't force in_interrupt() to return true in IST handlers

2016-06-10 13:54:47 +02:00

tsc_msr.c

x86/tsc: Add missing Cherrytrail frequency to the table

2016-05-12 14:27:14 +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: Save an indentation level in recalibrate_cpu_khz()

2016-04-13 11:37:43 +02:00

uprobes.c

Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-05-16 15:15:17 -07:00

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

x86/boot: Move compressed kernel to the end of the decompression buffer

2016-04-29 11:03:29 +02:00

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/tsc: Remove unused tsc_pre_init() hook

2015-11-19 11:03:13 +01:00

x8664_ksyms_64.c

x86/hweight: Get rid of the special calling convention

2016-06-08 15:01:02 +02:00