xiaomi-sm8450/android_kernel_xiaomi_sm8450
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dd853fd216d1485ed3045ff772079cc8689a9a4a
android_kernel_xiaomi_sm8450/arch/x86/kernel
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Lukasz Odzioba dd853fd216 x86/cpu: Fix bootup crashes by sanitizing the argument of the 'clearcpuid=' command-line option 
A negative number can be specified in the cmdline which will be used as
setup_clear_cpu_cap() argument. With that we can clear/set some bit in
memory predceeding boot_cpu_data/cpu_caps_cleared which may cause kernel
to misbehave. This patch adds lower bound check to setup_disablecpuid().

Boris Petkov reproduced a crash:

  [    1.234575] BUG: unable to handle kernel paging request at ffffffff858bd540
  [    1.236535] IP: memcpy_erms+0x6/0x10

Signed-off-by: Lukasz Odzioba <lukasz.odzioba@intel.com>
Acked-by: Borislav Petkov <bp@suse.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: andi.kleen@intel.com
Cc: bp@alien8.de
Cc: dave.hansen@linux.intel.com
Cc: luto@kernel.org
Cc: slaoub@gmail.com
Fixes: ac72e7888a ("x86: add generic clearcpuid=... option")
Link: http://lkml.kernel.org/r/1482933340-11857-1-git-send-email-lukasz.odzioba@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-05 08:54:34 +01:00
..
acpi
x86/init: Add i8042 state to the platform data
2016-12-19 11:34:15 +01:00
apic
cpu/hotplug: Cleanup state names
2016-12-25 10:47:44 +01:00
cpu
x86/cpu: Fix bootup crashes by sanitizing the argument of the 'clearcpuid=' command-line option
2017-01-05 08:54:34 +01:00
fpu
Merge branch 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-12-12 14:27:49 -08:00
kprobes
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
.gitignore
…
alternative.c
x86/alternatives: Do not use sync_core() to serialize I$
2016-12-20 09:36:42 +01:00
amd_gart_64.c
dma-mapping: use unsigned long for dma_attrs
2016-08-04 08:50:07 -04:00
amd_nb.c
x86/amd_nb: Add SMN and Indirect Data Fabric access for AMD Fam17h
2016-11-16 20:46:38 +01:00
apb_timer.c
Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-12-25 14:30:04 -08:00
aperture_64.c
param: convert some "on"/"off" users to strtobool
2016-03-17 15:09:34 -07:00
apm_32.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -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
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
Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-12-12 19:25:04 -08:00
crash_dump_32.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
crash_dump_64.c
…
crash.c
kexec_file: Change kexec_add_buffer to take kexec_buf as argument.
2016-11-30 23:14:59 +11:00
devicetree.c
x86/cpufeature: Replace cpu_has_apic with boot_cpu_has() usage
2016-04-13 11:37:41 +02:00
doublefault.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
dumpstack_32.c
x86/dumpstack: Make stack name tags more comprehensible
2016-11-21 13:00:42 +01:00
dumpstack_64.c
x86/dumpstack: Make stack name tags more comprehensible
2016-11-21 13:00:42 +01:00
dumpstack.c
Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-12-12 13:49:57 -08:00
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
Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-12-12 13:49:57 -08:00
head_64.S
x86/boot/64: Push correct start_cpu() return address
2016-12-14 08:48:05 +01:00
hpet.c
Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-12-25 14:30:04 -08:00
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: Remove empty idle.h header
2016-12-09 21:23:22 +01:00
irq_work.c
treewide: Remove old email address
2015-11-23 09:44:58 +01:00
irq.c
x86: Remove empty idle.h header
2016-12-09 21:23:22 +01:00
irqinit.c
x86/irq: Store irq descriptor in vector array
2015-08-06 00:14:59 +02:00
itmt.c
x86/sched: Use #include <linux/mutex.h> instead of #include <asm/mutex.h>
2016-11-28 09:43:49 +01:00
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
kexec_file: Change kexec_add_buffer to take kexec_buf as argument.
2016-11-30 23:14:59 +11:00
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 'x86-idle-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-12-12 14:55:04 -08:00
kvmclock.c
clocksource: Use a plain u64 instead of cycle_t
2016-12-25 11:04:12 +01:00
ldt.c
Merge branch 'akpm' (patches from Andrew)
2016-12-12 20:50:02 -08:00
livepatch.c
livepatch/x86: apply alternatives and paravirt patches after relocations
2016-08-18 23:41:55 +02:00
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: export the value of phys_base instead of symbol address
2016-12-14 16:04:07 -08:00
Makefile
Merge branch 'x86-timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-12-18 13:59:10 -08:00
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/msr: Remove bogus cleanup from the error path
2016-12-25 10:47:41 +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/paravirt: Mark unused patch_default label
2016-12-22 17:43:35 +01:00
paravirt_patch_64.c
x86/paravirt: Mark unused patch_default label
2016-12-22 17:43:35 +01:00
paravirt-spinlocks.c
x86/paravirt: Optimize native pv_lock_ops.vcpu_is_preempted()
2016-11-22 12:48:11 +01:00
paravirt.c
x86/fpu: Remove clts()
2016-11-01 07:47:55 +01:00
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
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: Add i8042 state to the platform data
2016-12-19 11:34:15 +01:00
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
Merge branch 'x86-cache-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-12-22 09:25:45 -08:00
process_64.c
Merge branch 'x86-cache-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-12-22 09:25:45 -08:00
process.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
ptrace.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
pvclock.c
clocksource: Use a plain u64 instead of cycle_t
2016-12-25 11:04:12 +01:00
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
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
x86/e820: Prepare e280 code for switch to dynamic storage
2016-09-21 15:02:12 +02:00
rtc.c
timekeeping: Ignore the bogus sleep time if pm_trace is enabled
2016-11-29 18:02:58 +01:00
setup_percpu.c
x86/percpu: Remove unnecessary include of module.h, add asm/desc.h
2016-11-15 07:26:37 +01:00
setup.c
mm: remove x86-only restriction of movable_node
2016-12-12 18:55:07 -08:00
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
x86/apic: Prevent tracing on apic_msr_write_eoi()
2016-11-09 22:03:14 +01:00
smpboot.c
x86/smpboot: Prevent false positive out of bounds cpumask access warning
2016-12-15 11:32:31 +01:00
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
x86/sysfb: Use PTR_ERR_OR_ZERO
2014-10-17 13:40:52 -07:00
tboot.c
cpu/hotplug: Cleanup state names
2016-12-25 10:47:44 +01:00
tce_64.c
x86/cpufeature: Remove cpu_has_clflush
2016-03-31 13:35:09 +02:00
test_nx.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
test_rodata.c
x86: Don't use module.h just for AUTHOR / LICENSE tags
2016-07-14 13:04:20 +02:00
time.c
x86/asm/entry: Change all 'user_mode_vm()' calls to 'user_mode()'
2015-03-23 11:14:17 +01:00
tls.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
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
tracing: Have the reg function allow to fail
2016-12-09 09:13:30 -05:00
traps.c
x86/fpu: Handle #NM without FPU emulation as an error
2016-11-01 07:47:54 +01:00
tsc_msr.c
x86/tsc: Set TSC_KNOWN_FREQ and TSC_RELIABLE flags on Intel Atom SoCs
2016-11-18 10:58:31 +01:00
tsc_sync.c
x86/tsc: Limit the adjust value further
2016-12-18 16:37:04 +01:00
tsc.c
clocksource: Use a plain u64 instead of cycle_t
2016-12-25 11:04:12 +01:00
unwind_frame.c
Revert "x86/unwind: Detect bad stack return address"
2016-12-23 20:32:30 +01:00
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
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
vmlinux.lds.S
x86/boot: Move the _stext marker to before the boot code
2016-10-20 09:15:24 +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/init: Remove i8042_detect() from platform ops
2016-12-19 11:34:15 +01:00