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f1d9a2abff66aa8156fbc1493abed468db63ea48
linux/arch/x86/kernel
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Miroslav Benes f1d9a2abff x86/unwind/orc: Don't skip the first frame for inactive tasks 
When unwinding an inactive task, the ORC unwinder skips the first frame
by default.  If both the 'regs' and 'first_frame' parameters of
unwind_start() are NULL, 'state->sp' and 'first_frame' are later
initialized to the same value for an inactive task.  Given there is a
"less than or equal to" comparison used at the end of __unwind_start()
for skipping stack frames, the first frame is skipped.

Drop the equal part of the comparison and make the behavior equivalent
to the frame pointer unwinder.

Fixes: ee9f8fce99 ("x86/unwind: Add the ORC unwinder")
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Signed-off-by: Miroslav Benes <mbenes@suse.cz>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Dave Jones <dsj@fb.com>
Cc: Jann Horn <jannh@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Link: https://lore.kernel.org/r/7f08db872ab59e807016910acdbe82f744de7065.1587808742.git.jpoimboe@redhat.com
2020-04-25 12:22:29 +02:00
..
acpi
ACPI, x86/boot: make acpi_nobgrt static
2020-04-08 14:32:03 +02:00
apic
Merge tag 'irq-core-2020-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-03-30 17:35:14 -07:00
cpu
Merge tag 'x86-urgent-2020-04-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-04-19 11:58:32 -07:00
fpu
x86/pkeys: Add check for pkey "overflow"
2020-02-24 20:25:21 +01:00
kprobes
x86/optprobe: Fix OPTPROBE vs UACCESS
2020-03-20 13:06:22 +01:00
.gitignore
.gitignore: add SPDX License Identifier
2020-03-25 11:50:48 +01:00
alternative.c
x86/alternatives: Mark text_poke_loc_init() static
2020-03-25 12:42:35 +01:00
amd_gart_64.c
x86/mm: thread pgprot_t through init_memory_mapping()
2020-04-10 15:36:21 -07:00
amd_nb.c
x86/amd_nb, char/amd64-agp: Use amd_nb_num() accessor
2020-03-17 10:25:58 +01:00
apb_timer.c
remove ioremap_nocache and devm_ioremap_nocache
2020-01-06 09:45:59 +01:00
aperture_64.c
x86/gart: Exclude GART aperture from kcore
2019-03-23 12:11:49 +01:00
apm_32.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 118
2019-05-24 17:39:02 +02:00
asm-offsets_32.c
Merge tag 'x86-entry-2020-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-03-30 19:14:28 -07:00
asm-offsets_64.c
x86/entry: Move max syscall number calculation to syscallhdr.sh
2020-03-21 16:03:21 +01:00
asm-offsets.c
efi/x86: Avoid using code32_start
2020-03-08 09:58:17 +01:00
audit_64.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
bootflag.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
check.c
x86/headers: Fix -Wmissing-prototypes warning
2018-11-23 07:59:59 +01:00
cpuid.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 142
2019-05-30 11:25:17 -07:00
crash_core_32.c
x86/crash: Define arch_crash_save_vmcoreinfo() if CONFIG_CRASH_CORE=y
2019-12-23 12:58:41 +01:00
crash_core_64.c
x86/crash: Define arch_crash_save_vmcoreinfo() if CONFIG_CRASH_CORE=y
2019-12-23 12:58:41 +01:00
crash_dump_32.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
crash_dump_64.c
fs/core/vmcore: Move sev_active() reference to x86 arch code
2019-08-09 22:52:10 +10:00
crash.c
x86/crash: Use resource_size()
2020-01-09 14:40:03 +01:00
devicetree.c
x86/headers: Fix -Wmissing-prototypes warning
2018-11-23 07:59:59 +01:00
doublefault_32.c
x86/doublefault/32: Rewrite the x86_32 #DF handler and unify with 64-bit
2019-11-26 22:00:04 +01:00
dumpstack_32.c
x86/doublefault/32: Move #DF stack and TSS to cpu_entry_area
2019-11-26 21:53:34 +01:00
dumpstack_64.c
x86/unwind: Prevent false warnings for non-current tasks
2020-04-25 12:22:28 +02:00
dumpstack.c
x86/kasan: Print original address on #GP
2019-12-31 13:15:38 +01:00
e820.c
Merge tag 'acpi-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2019-11-26 19:25:25 -08:00
early_printk.c
efi/x86: Convert x86 EFI earlyprintk into generic earlycon implementation
2019-02-04 08:27:30 +01:00
early-quirks.c
x86/intel: Disable HPET on Intel Ice Lake platforms
2019-11-29 12:17:58 +01:00
ebda.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
eisa.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 243
2019-06-19 17:09:07 +02:00
espfix_64.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288
2019-06-05 17:36:37 +02:00
ftrace_32.S
x86/ftrace: Get rid of function_hook
2019-10-25 10:52:22 +02:00
ftrace_64.S
Merge tag 'trace-v5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
2019-11-27 11:42:01 -08:00
ftrace.c
Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-01-28 09:44:15 -08:00
head32.c
x86/boot: Mostly revert commit ae7e1238e6 ("Add ACPI RSDP address to setup_header")
2018-11-20 09:43:10 +01:00
head64.c
x86/boot/64: Make level2_kernel_pgt pages invalid outside kernel area
2019-10-11 18:38:15 +02:00
head_32.S
x86/boot: Remove KEEP_SEGMENTS support
2020-02-22 23:37:37 +01:00
head_64.S
x86/asm/64: Change all ENTRY+END to SYM_CODE_*
2019-10-18 11:58:26 +02:00
hpet.c
remove ioremap_nocache and devm_ioremap_nocache
2020-01-06 09:45:59 +01:00
hw_breakpoint.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
i8237.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
i8253.c
x86/timer: Skip PIT initialization on modern chipsets
2019-06-29 11:35:35 +02:00
i8259.c
x86: Don't include linux/irq.h from asm/hardirq.h
2018-08-05 09:53:13 +02:00
idt.c
Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2019-07-08 11:22:57 -07:00
ima_arch.c
Merge tag 'efi-next' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi into efi/core
2020-02-26 15:21:22 +01:00
io_delay.c
x86/io_delay: Define IO_DELAY macros in C instead of Kconfig
2019-05-24 08:46:06 +02:00
ioport.c
x86/iopl: Include prototype header for ksys_ioperm()
2020-02-17 16:36:53 +01:00
irq_32.c
x86/irq: Move IS_ERR_OR_NULL() check into common do_IRQ() code
2019-08-19 23:19:06 +02:00
irq_64.c
x86/irq: Move IS_ERR_OR_NULL() check into common do_IRQ() code
2019-08-19 23:19:06 +02:00
irq_work.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
irq.c
x86/irq: Remove useless return value from do_IRQ()
2020-02-27 14:48:40 +01:00
irqflags.S
x86/asm: Change all ENTRY+ENDPROC to SYM_FUNC_*
2019-10-18 11:58:33 +02:00
irqinit.c
x86: Replace setup_irq() by request_irq()
2020-03-21 15:15:47 +01:00
itmt.c
proc/sysctl: add shared variables for range check
2019-07-18 17:08:07 -07:00
jailhouse.c
x86/jailhouse: Only enable platform UARTs if available
2019-10-10 15:43:59 +02:00
jump_label.c
x86/jump_label: Move 'inline' keyword placement
2020-03-27 11:05:41 +01:00
kdebugfs.c
x86/boot: Introduce setup_indirect
2019-11-12 16:21:15 +01:00
kexec-bzimage64.c
efi/x86: Make fw_vendor, config_table and runtime sysfs nodes x86 specific
2020-02-23 21:59:42 +01:00
kgdb.c
x86/apic: Provide and use helper for send_IPI_allbutself()
2019-07-25 16:12:00 +02:00
ksysfs.c
x86/boot: Introduce setup_indirect
2019-11-12 16:21:15 +01:00
kvm.c
KVM: Pre-allocate 1 cpumask variable per cpu for both pv tlb and pv ipis
2020-02-28 10:34:25 +01:00
kvmclock.c
x86/vdso: Use generic VDSO clock mode storage
2020-02-17 14:40:23 +01:00
ldt.c
x86: Remove unneeded includes
2020-03-21 16:03:25 +01:00
livepatch.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13
2019-05-21 11:28:45 +02:00
machine_kexec_32.c
x86/crash: Define arch_crash_save_vmcoreinfo() if CONFIG_CRASH_CORE=y
2019-12-23 12:58:41 +01:00
machine_kexec_64.c
x86/crash: Define arch_crash_save_vmcoreinfo() if CONFIG_CRASH_CORE=y
2019-12-23 12:58:41 +01:00
Makefile
Merge branch 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity
2020-04-02 14:49:46 -07:00
mmconf-fam10h_64.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
module.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
mpparse.c
x86/boot: Fix memory leak in default_get_smp_config()
2019-07-16 23:13:48 +02:00
msr.c
x86/msr: Restrict MSR access when the kernel is locked down
2019-08-19 21:54:16 -07:00
nmi_selftest.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
nmi.c
x86: Fix a handful of typos
2020-02-16 20:58:06 +01:00
paravirt_patch.c
x86/paravirt: Standardize 'insn_buff' variable names
2019-04-29 16:05:49 +02:00
paravirt-spinlocks.c
x86/paravirt: Use a single ops structure
2018-09-03 16:50:35 +02:00
paravirt.c
x86/ioperm: Add new paravirt function update_io_bitmap()
2020-02-29 12:43:09 +01:00
pci-dma.c
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux; tag 'dma-mapping-5.5' of git://git.infradead.org/users/hch/dma-mapping
2019-11-28 11:16:43 -08:00
pci-iommu_table.c
x86/iommu: Use NULL instead of 0
2018-08-02 14:33:19 +02:00
pci-swiotlb.c
dma-mapping: fix filename references
2019-09-03 08:36:30 +02:00
pcspeaker.c
x86/platform/pcspeaker: Use PTR_ERR_OR_ZERO() to fix ptr_ret.cocci warning
2018-07-24 09:46:42 +02:00
perf_regs.c
perf/x86/regs: Check reserved bits
2019-06-24 19:19:24 +02:00
platform-quirks.c
x86/i8237: Register device based on FADT legacy boot flag
2018-04-27 16:44:29 +02:00
pmem.c
resource: Provide resource struct in resource walk callback
2017-11-07 15:35:57 +01:00
probe_roms.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
process_32.c
x86: Remove unneeded includes
2020-03-21 16:03:25 +01:00
process_64.c
x86: Remove unneeded includes
2020-03-21 16:03:25 +01:00
process.c
Merge tag 'x86-splitlock-2020-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-03-30 19:35:52 -07:00
process.h
x86: Use the correct SPDX License Identifier in headers
2019-10-01 20:31:35 +02:00
ptrace.c
x86/ptrace: Document FSBASE and GSBASE ABI oddities
2019-11-26 22:00:12 +01:00
pvclock.c
x86/vdso: Use generic VDSO clock mode storage
2020-02-17 14:40:23 +01:00
quirks.c
remove ioremap_nocache and devm_ioremap_nocache
2020-01-06 09:45:59 +01:00
reboot_fixups_32.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
reboot.c
x86: Fix a handful of typos
2020-02-16 20:58:06 +01:00
relocate_kernel_32.S
x86/asm: Annotate relocate_kernel_{32,64}.c
2019-10-18 09:53:19 +02:00
relocate_kernel_64.S
x86/kexec: Make relocate_kernel_64.S objtool clean
2020-03-25 18:28:28 +01:00
resource.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
rtc.c
x86: Convert x86_platform_ops to timespec64
2018-05-19 14:03:14 +02:00
setup_percpu.c
x86: Use pr_warn instead of pr_warning
2019-10-18 15:00:18 +02:00
setup.c
mm: hugetlb: optionally allocate gigantic hugepages using cma
2020-04-10 15:36:21 -07:00
signal_compat.c
signal: Add TRAP_UNK si_code for undiagnosted trap exceptions
2018-04-25 10:40:56 -05:00
signal.c
Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-03-31 11:04:05 -07:00
smp.c
x86/smp: Move smp_function_call implementations into IPI code
2019-07-25 16:12:01 +02:00
smpboot.c
Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-03-31 11:04:05 -07:00
stacktrace.c
x86 user stack frame reads: switch to explicit __get_user()
2020-02-15 17:26:26 -05:00
step.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
sys_ia32.c
x86/entry/32: Use IA32-specific wrappers for syscalls taking 64-bit arguments
2020-03-21 16:03:24 +01:00
sys_x86_64.c
x86: Remove unneeded includes
2020-03-21 16:03:25 +01:00
sysfb_efi.c
x86/sysfb_efi: Add quirks for some devices with swapped width and height
2019-07-22 10:47:11 +02:00
sysfb_simplefb.c
x86/sysfb: Fix check for bad VRAM size
2020-01-20 10:57:53 +01:00
sysfb.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
tboot.c
remove ioremap_nocache and devm_ioremap_nocache
2020-01-06 09:45:59 +01:00
time.c
Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-03-31 11:04:05 -07:00
tls.c
x86/tls: Fix possible spectre-v1 in do_get_thread_area()
2019-06-27 23:48:04 +02:00
tls.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 193
2019-05-30 11:29:21 -07:00
topology.c
x86/smp: Replace cpu_up/down() with add/remove_cpu()
2020-03-25 12:59:35 +01:00
trace_clock.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
tracepoint.c
x86/kernel: Fix more -Wmissing-prototypes warnings
2018-12-08 12:24:35 +01:00
traps.c
Merge tag 'x86-splitlock-2020-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-03-30 19:35:52 -07:00
tsc_msr.c
Merge tag 'x86-timers-2020-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-03-30 19:55:39 -07:00
tsc_sync.c
x86: Fix a handful of typos
2020-02-16 20:58:06 +01:00
tsc.c
Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-03-31 11:04:05 -07:00
umip.c
x86/umip: Make umip_insns static
2020-04-15 11:13:12 +02:00
unwind_frame.c
x86/unwind: Prevent false warnings for non-current tasks
2020-04-25 12:22:28 +02:00
unwind_guess.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
unwind_orc.c
x86/unwind/orc: Don't skip the first frame for inactive tasks
2020-04-25 12:22:29 +02:00
uprobes.c
x86/apic, x86/uprobes: Correct parameter names in kernel-doc comments
2019-10-27 09:00:28 +01:00
verify_cpu.S
x86/asm: Annotate local pseudo-functions
2019-10-18 10:04:04 +02:00
vm86_32.c
x86: switch save_v86_state() to unsafe_put_user()
2020-03-18 20:36:01 -04:00
vmlinux.lds.S
Merge branch 'x86-build-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-03-31 10:51:12 -07:00
vsmp_64.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 346
2019-06-05 17:37:08 +02:00
x86_init.c
Merge tag 'x86-urgent-2020-02-09' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-02-09 12:11:12 -08:00