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OpenCloudOS-Kernel/arch/x86/kernel
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Andy Lutomirski 2deb4be280 x86/dumpstack: When OOPSing, rewind the stack before do_exit() 
If we call do_exit() with a clean stack, we greatly reduce the risk of
recursive oopses due to stack overflow in do_exit, and we allow
do_exit to work even if we OOPS from an IST stack.  The latter gives
us a much better chance of surviving long enough after we detect a
stack overflow to write out our logs.

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/32f73ceb372ec61889598da5e5b145889b9f2e19.1468527351.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 		2016-07-15 10:26:28 +02:00
..
acpi ACPI material for v4.7-rc1 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
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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
alternative.c x86/asm: Stop depending on ptrace.h in alternative.h 2016-04-29 11:56:40 +02:00
amd_gart_64.c
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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.c x86/boot: Move compressed kernel to the end of the decompression buffer 2016-04-29 11:03:29 +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
audit_64.c
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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.c x86/kexec: Remove walk_iomem_res() call with GART type 2016-01-30 09:49:59 +01:00
crash_dump_32.c
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crash_dump_64.c
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devicetree.c x86/cpufeature: Replace cpu_has_apic with boot_cpu_has() usage 2016-04-13 11:37:41 +02:00
doublefault.c
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dumpstack.c x86/dumpstack: When OOPSing, rewind the stack before do_exit() 2016-07-15 10:26:28 +02:00
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
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-quirks.c Linux 4.4-rc2 2015-11-23 09:04:05 +01:00
early_printk.c x86: Fix misspellings in comments 2016-02-24 08:44:58 +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 Nothing major this round. Mostly small clean ups and fixes. 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
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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
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ioport.c x86/iopl: Fix iopl capability check on Xen PV 2016-03-17 09:49:27 +01:00
irq.c x86/irq: Call irq_force_move_complete with irq descriptor 2016-01-15 13:44:01 +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
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
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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
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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
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machine_kexec_64.c kexec: provide arch_kexec_protect(unprotect)_crashkres() 2016-05-23 17:04:14 -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
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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.c x86/nmi: Mark 'ignore_nmis' as __read_mostly 2016-03-08 12:48:19 +01:00
nmi_selftest.c
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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
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
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
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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
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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
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process.c exit_thread: accept a task parameter to be exited 2016-05-20 17:58:30 -07:00
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
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.c x86/efi: Force EFI reboot to process pending capsules 2016-04-28 11:34:04 +02:00
reboot_fixups_32.c
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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
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rtc.c x86/init: Disable pnpbios and rtc for X86_SUBARCH_CE4100 2016-04-22 10:29:09 +02:00
setup.c ACPI / x86: Cleanup initrd related code 2016-04-18 23:59:09 +02:00
setup_percpu.c
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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
signal_compat.c x86/signals: Add build-time checks to the siginfo compat code 2016-06-14 12:19:24 +02:00
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.c
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sysfb_efi.c Merge branch 'linus' into efi/core, to pick up fixes 2016-05-07 07:00:07 +02:00
sysfb_simplefb.c
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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
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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
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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.c x86/tsc: Save an indentation level in recalibrate_cpu_khz() 2016-04-13 11:37:43 +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
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