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5e23fee23ea10730c752edce1777e6b7e727290f
linux/arch/x86/kernel
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Oleg Nesterov 5e23fee23e x86, fpu: copy_process: Sanitize fpu->last_cpu initialization 
Cosmetic, but imho memset(&dst->thread.fpu, 0) is not good simply
because it hides the (important) usage of ->has_fpu/etc from grep.
Change this code to initialize the members explicitly.

And note that ->last_cpu = 0 looks simply wrong, this can confuse
fpu_lazy_restore() if per_cpu(fpu_owner_task, 0) has already exited
and copy_process() re-allocated the same task_struct. Fortunately
this is not actually possible because child->fpu_counter == 0 and
thus fpu_lazy_restore() will not be called, but still this is not
clean/robust.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Link: http://lkml.kernel.org/r/20140902175727.GA21666@redhat.com
Reviewed-by: Suresh Siddha <sbsiddha@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2014-09-02 14:51:16 -07:00
..
acpi
Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-08-13 18:23:32 -06:00
apic
x86, irq, PCI: Keep IRQ assignment for runtime power management
2014-08-29 13:38:00 +02:00
cpu
Merge tag 'pci-v3.17-changes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
2014-08-14 18:10:33 -06:00
kprobes
kprobes/x86: Don't try to resolve kprobe faults from userspace
2014-07-16 14:16:32 +02:00
.gitignore
…
alternative.c
kprobes, x86: Allow kprobes on text_poke/hw_breakpoint
2014-04-24 10:03:02 +02:00
amd_gart_64.c
x86: enable DMA CMA with swiotlb
2014-06-04 16:53:57 -07:00
amd_nb.c
Merge tag 'edac_for_3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp
2014-04-01 13:54:00 -07:00
apb_timer.c
intel_mid: Renamed *mrst* to *intel_mid*
2013-10-17 16:40:47 -07:00
aperture_64.c
x86/gart: Tidy messages and add bridge device info
2014-05-23 10:47:19 -06:00
apm_32.c
x86: Remove unused variable "polling"
2014-07-16 12:58:47 +02:00
asm-offsets_32.c
x86: Get rid of ->hard_math and all the FPU asm fu
2013-06-06 14:32:04 -07:00
asm-offsets_64.c
x86, gdt, hibernate: Store/load GDT for hibernate path.
2013-05-02 11:27:35 -07:00
asm-offsets.c
sched, x86: Provide a per-cpu preempt_count implementation
2013-09-25 14:07:57 +02:00
audit_64.c
…
bootflag.c
…
check.c
x86/mm: memblock: switch to use NUMA_NO_NODE
2014-01-21 16:19:47 -08:00
cpuid.c
x86, cpuid: Fix CPU hotplug callback registration
2014-03-20 13:43:42 +01:00
crash_dump_32.c
…
crash_dump_64.c
…
crash.c
kexec: create a new config option CONFIG_KEXEC_FILE for new syscall
2014-08-29 16:28:16 -07:00
devicetree.c
x86, irq, devicetree: Release IOAPIC pin when PCI device is disabled
2014-06-21 23:05:44 +02:00
doublefault.c
x86: Delete non-required instances of include <linux/init.h>
2014-01-06 21:25:18 -08:00
dumpstack_32.c
Merge branch 'x86-threadinfo-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-04-01 10:17:18 -07:00
dumpstack_64.c
x86: Fix dumpstack_64 irq stack handling
2014-04-02 11:46:50 -07:00
dumpstack.c
kprobes, x86: Use NOKPROBE_SYMBOL() instead of __kprobes annotation
2014-04-24 10:26:38 +02:00
e820.c
x86/mm: memblock: switch to use NUMA_NO_NODE
2014-01-21 16:19:47 -08:00
early_printk.c
Merge branch 'x86-intel-mid-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-11-12 11:12:22 +09:00
early-quirks.c
Merge commit '9e9a928eed8796a0a1aaed7e0b676db86ba84594' into drm-next
2014-06-05 20:28:59 +10:00
entry_32.S
x86_32, entry: Clean up sysenter_badsys declaration
2014-08-15 13:45:32 -07:00
entry_64.S
Merge branches 'x86-build-for-linus', 'x86-cleanups-for-linus' and 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-08-04 16:56:16 -07:00
espfix_64.c
x86/espfix/xen: Fix allocation of pages for paravirt page tables
2014-07-14 13:47:32 -07:00
ftrace.c
ftrace/x86: Add call to ftrace_graph_is_dead() in function graph code
2014-07-17 09:45:08 -04:00
head32.c
asmlinkage, x86: Add explicit __visible to arch/x86/*
2014-05-05 16:07:44 -07:00
head64.c
kernel/printk: use symbolic defines for console loglevels
2014-06-04 16:54:17 -07:00
head_32.S
x86: fix compile error due to X86_TRAP_NMI use in asm files
2014-03-07 18:58:40 -08:00
head_64.S
x86: fix compile error due to X86_TRAP_NMI use in asm files
2014-03-07 18:58:40 -08:00
head.c
x86: Make sure we can boot in the case the BDA contains pure garbage
2013-02-27 13:38:57 -08:00
hpet.c
Merge branch 'x86/vdso' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next
2014-06-05 08:05:29 -07:00
hw_breakpoint.c
kprobes, x86: Allow kprobes on text_poke/hw_breakpoint
2014-04-24 10:03:02 +02:00
i386_ksyms_32.c
sched, x86: Optimize the preempt_schedule() call
2013-09-25 14:23:07 +02:00
i387.c
x86/xsaves: Clear reserved bits in xsave header
2014-05-29 14:33:00 -07:00
i8237.c
…
i8253.c
…
i8259.c
x86, irq, pic: Probe for legacy PIC and set legacy_pic appropriately
2014-04-14 11:49:55 -07:00
io_delay.c
…
ioport.c
x86: get rid of pt_regs argument of iopl(2)
2013-02-03 18:16:24 -05:00
iosf_mbi.c
PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use
2014-08-12 12:15:14 -06:00
irq_32.c
x86, threadinfo: Redo "x86: Use inline assembler to get sp"
2014-03-10 17:32:01 -07:00
irq_64.c
irq: Consolidate do_softirq() arch overriden implementations
2013-10-01 12:53:25 +02:00
irq_work.c
x86, asmlinkage: Make all interrupt handlers asmlinkage / __visible
2013-08-06 14:18:23 -07:00
irq.c
Merge branch 'x86-irq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-06-12 20:03:47 -07:00
irqinit.c
x86: Fix non-PC platform kernel crash on boot due to NULL dereference
2014-08-25 22:36:57 +02:00
jump_label.c
x86/jump_label: expect default_nop if static_key gets enabled on boot-up
2013-10-19 19:45:35 -04:00
kdebugfs.c
…
kexec-bzimage64.c
kexec: verify the signature of signed PE bzImage
2014-08-08 15:57:33 -07:00
kgdb.c
x86: Delete non-required instances of include <linux/init.h>
2014-01-06 21:25:18 -08:00
ksysfs.c
x86: ksysfs.c build fix
2014-01-03 14:37:13 +00:00
kvm.c
Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-06-12 19:18:49 -07:00
kvmclock.c
kvm: remove redundant registration of BSP's hv_clock area
2014-02-22 15:53:32 +01:00
ldt.c
Revert "x86-64, modify_ldt: Make support for 16-bit segments a runtime option"
2014-05-21 10:22:59 -07:00
machine_kexec_32.c
x86: Delete non-required instances of include <linux/init.h>
2014-01-06 21:25:18 -08:00
machine_kexec_64.c
kexec: create a new config option CONFIG_KEXEC_FILE for new syscall
2014-08-29 16:28:16 -07:00
Makefile
kexec: create a new config option CONFIG_KEXEC_FILE for new syscall
2014-08-29 16:28:16 -07:00
mcount_64.S
ftrace: x86: Remove check of obsolete variable function_trace_stop
2014-07-18 13:57:02 -04:00
mmconf-fam10h_64.c
x86: delete __cpuinit usage from all x86 files
2013-07-14 19:36:56 -04:00
module.c
x86, kaslr: fix module lock ordering problem
2014-03-24 10:18:26 -07:00
mpparse.c
x86, apic: Remove mps_oem_check callback
2014-07-31 08:05:42 -07:00
msr.c
x86, msr: Fix CPU hotplug callback registration
2014-03-20 13:43:42 +01:00
nmi_selftest.c
…
nmi.c
kprobes, x86: Use NOKPROBE_SYMBOL() instead of __kprobes annotation
2014-04-24 10:26:38 +02:00
paravirt_patch_32.c
…
paravirt_patch_64.c
x86_64/entry/xen: Do not invoke espfix64 on Xen
2014-07-28 15:25:40 -07:00
paravirt-spinlocks.c
x86, ticketlock: Add slowpath logic
2013-08-09 07:54:00 -07:00
paravirt.c
kprobes, x86: Prohibit probing on native_set_debugreg()/load_idt()
2014-04-24 10:02:58 +02:00
pci-calgary_64.c
x86, calgary: Use 8M TCE table size by default
2014-04-10 19:51:32 -07:00
pci-dma.c
arch/x86/kernel/pci-dma.c: fix dma_generic_alloc_coherent() when CONFIG_DMA_CMA is enabled
2014-06-04 16:53:57 -07:00
pci-iommu_table.c
…
pci-nommu.c
x86: Delete non-required instances of include <linux/init.h>
2014-01-06 21:25:18 -08:00
pci-swiotlb.c
x86: enable DMA CMA with swiotlb
2014-06-04 16:53:57 -07:00
pcspeaker.c
…
perf_regs.c
perf: Fix off by one test in perf_reg_value()
2012-09-19 17:08:40 +02:00
pmc_atom.c
x86/pmc_atom: Silence shift wrapping warnings in pmc_sleep_tmr_show()
2014-08-02 16:52:17 -07:00
preempt.S
sched, x86: Optimize the preempt_schedule() call
2013-09-25 14:23:07 +02:00
probe_roms.c
x86/pci/probe_roms: Add missing __iomem annotation to pci_map_biosrom()
2012-09-05 10:52:25 +02:00
process_32.c
x86: Keep thread_info on thread stack in x86_32
2014-03-06 16:56:55 -08:00
process_64.c
Merge branch 'perf/urgent' into perf/core, to resolve conflict and to prepare for new patches
2014-06-06 07:55:06 +02:00
process.c
x86, fpu: copy_process: Sanitize fpu->last_cpu initialization
2014-09-02 14:51:16 -07:00
ptrace.c
x86: Keep thread_info on thread stack in x86_32
2014-03-06 16:56:55 -08:00
pvclock.c
hung_task: add method to reset detector
2013-11-06 09:49:02 +02:00
quirks.c
x86/amd/numa: Fix northbridge quirk to assign correct NUMA node
2014-03-14 11:05:36 +01:00
reboot_fixups_32.c
…
reboot.c
x86/reboot: Add EFI reboot quirk for ACPI Hardware Reduced flag
2014-07-18 21:23:52 +01:00
relocate_kernel_32.S
x86, asm, cleanup: Replace open-coded control register values with symbolic
2013-06-25 16:26:06 -07:00
relocate_kernel_64.S
x86, reloc: Use xorl instead of xorq in relocate_kernel_64.S
2013-06-20 21:30:04 -07:00
resource.c
x86: don't exclude low BIOS area when allocating address space for non-PCI cards
2014-07-16 12:29:36 -06:00
rtc.c
Merge branch 'x86-intel-mid-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-11-12 11:12:22 +09:00
setup_percpu.c
…
setup.c
arch/x86: Replace plain strings with constants
2014-07-18 21:23:59 +01:00
signal.c
x86, fpu: shift drop_init_fpu() from save_xstate_sig() to handle_signal()
2014-09-02 14:51:14 -07:00
smp.c
asmlinkage, x86: Add explicit __visible to arch/x86/*
2014-05-05 16:07:44 -07:00
smpboot.c
x86, apic: Remove setup_portio_remap callback
2014-07-31 08:05:44 -07:00
stacktrace.c
…
step.c
ptrace: ensure arch_ptrace/ptrace_request can never race with SIGKILL
2013-01-22 10:08:00 -08:00
sys_x86_64.c
x86 get_unmapped_area: Access mmap_legacy_base through mm_struct member
2013-08-22 10:19:35 -07:00
syscall_32.c
x86, asmlinkage: Make syscall tables visible
2013-08-06 14:20:18 -07:00
syscall_64.c
x86, asmlinkage: Make syscall tables visible
2013-08-06 14:20:18 -07:00
sysfb_efi.c
x86: sysfb: move EFI quirks from efifb to sysfb
2013-08-02 16:17:47 -07:00
sysfb_simplefb.c
x86/simplefb: Mark framebuffer mem-resources as IORESOURCE_BUSY to avoid bootup warning
2013-10-03 07:51:11 +02:00
sysfb.c
x86: sysfb: move EFI quirks from efifb to sysfb
2013-08-02 16:17:47 -07:00
tboot.c
x86 / tboot / ACPI: Fail extended mode reduced hardware sleep
2013-07-31 14:25:51 +02:00
tce_64.c
…
test_nx.c
…
test_rodata.c
…
time.c
x86: Fix non-PC platform kernel crash on boot due to NULL dereference
2014-08-25 22:36:57 +02:00
tls.c
make SYSCALL_DEFINE<n>-generated wrappers do asmlinkage_protect
2013-03-03 22:58:33 -05:00
tls.h
…
topology.c
hotplug, powerpc, x86: Remove cpu_hotplug_driver_lock()
2013-09-30 19:55:51 +02:00
trace_clock.c
tracing,x86: Add a TSC trace_clock
2012-11-13 15:48:27 -05:00
tracepoint.c
x86: Make sure IDT is page aligned
2013-07-16 15:14:48 -07:00
traps.c
x86/kprobes: Fix build errors and blacklist context_track_user
2014-06-14 09:07:44 +02:00
tsc_msr.c
x86: tsc: Add missing Baytrail frequency to the table
2014-02-19 17:12:24 +01:00
tsc_sync.c
x86: Delete non-required instances of include <linux/init.h>
2014-01-06 21:25:18 -08:00
tsc.c
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-08-05 17:46:42 -07:00
uprobes.c
uprobes/x86: Rename arch_uprobe->def to ->defparam, minor comment updates
2014-06-05 16:21:57 +02:00
verify_cpu.S
…
vm86_32.c
x86, vm86: fix VM86 syscalls: use SYSCALL_DEFINEx(...)
2013-05-02 20:36:32 -04:00
vmlinux.lds.S
x86, vdso: Zero-pad the VVAR page
2014-03-18 12:52:44 -07:00
vsmp_64.c
x86/apic/vsmp: Make is_vsmp_box() static
2014-08-01 15:09:45 -07:00
vsyscall_64.c
x86_64/vsyscall: Fix warn_bad_vsyscall log output
2014-07-25 16:34:15 -07:00
vsyscall_emu_64.S
…
vsyscall_gtod.c
timekeeping: Create struct tk_read_base and use it in struct timekeeper
2014-07-23 15:01:53 -07:00
vsyscall_trace.h
…
x86_init.c
PCI: Drop "irq" param from *_restore_msi_irqs()
2013-12-13 08:44:30 -07:00
x8664_ksyms_64.c
sched, x86: Optimize the preempt_schedule() call
2013-09-25 14:23:07 +02:00
xsave.c
x86, fpu: __restore_xstate_sig()->math_state_restore() needs preempt_disable()
2014-09-02 14:51:15 -07:00