Andy Lutomirski b3494a4ab2 x86/asm/entry: Check for syscall exit work with IRQs disabled ...

We currently have a race: if we're preempted during syscall
exit, we can fail to process syscall return work that is queued
up while we're preempted in ret_from_sys_call after checking
ti.flags.

Fix it by disabling interrupts before checking ti.flags.

Reported-by: Stefan Seyfried <stefan.seyfried@googlemail.com>
Reported-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Tejun Heo <tj@kernel.org>
Fixes: 96b6352c12 ("x86_64, entry: Remove the syscall exit audit")
Link: http://lkml.kernel.org/r/189320d42b4d671df78c10555976bb10af1ffc75.1427137498.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2015-03-24 21:08:28 +01:00

..

acpi

x86/platform, acpi: Bypass legacy PIC and PIT in ACPI hardware reduced mode

2015-03-12 12:07:13 +01:00

apic

x86/apic/numachip: Fix sibling map with NumaChip

2015-03-12 16:58:59 +01:00

cpu

x86: Init per-cpu shadow copy of CR4 on 32-bit CPUs too

2015-02-28 08:04:20 +01:00

kprobes

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

2015-03-01 11:56:13 -08:00

.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

x86, amd_nb: Add device IDs to NB tables for F15h M60h

2014-10-20 14:18:45 +02:00

apb_timer.c

x86/platform: Remove unused function from apb_timer.c

2014-12-23 10:43:35 +01:00

aperture_64.c

x86/gart: Tidy messages and add bridge device info

2014-05-23 10:47:19 -06:00

apm_32.c

cpuidle: Invert CPUIDLE_FLAG_TIME_VALID logic

2014-11-12 21:17:27 +01:00

asm-offsets_32.c

x86/asm: Guard against building the 32/64-bit versions of the asm-offsets*.c file directly

2014-12-11 11:43:56 +01:00

asm-offsets_64.c

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

2014-12-14 11:51:50 -08:00

asm-offsets.c

sched, x86: Provide a per-cpu preempt_count implementation

2013-09-25 14:07:57 +02:00

audit_64.c

x86: hook up execveat system call

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

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: Use PTR_ERR_OR_ZERO

2014-10-17 13:40:51 -07:00

crash_dump_32.c

…

crash_dump_64.c

…

crash.c

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

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

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_64, traps: Stop using IST for #SS

2014-11-23 13:56:19 -08:00

dumpstack.c

x86_64: add KASan support

2015-02-13 21:21:41 -08:00

e820.c

x86, e820: Clean up sanitize_e820_map() users

2015-01-23 16:14:27 +01:00

early_printk.c

Specify PCI based UART for earlyprintk

2015-02-02 10:11:27 -08:00

early-quirks.c

drm/i915/skl: Add the additional graphics stolen sizes

2014-09-24 14:47:39 +02:00

entry_32.S

x86/xen: allow privcmd hypercalls to be preempted

2015-02-23 16:30:24 +00:00

entry_64.S

x86/asm/entry: Check for syscall exit work with IRQs disabled

2015-03-24 21:08:28 +01:00

espfix_64.c

x86, espfix: Remove stale ptemask

2014-11-11 17:57:46 +01:00

ftrace.c

module: remove mod arg from module_free, rename module_memfree().

2015-01-20 11:38:33 +10:30

head32.c

x86: Store a per-cpu shadow copy of CR4

2015-02-04 12:10:42 +01:00

head64.c

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

2015-02-16 14:58:12 -08:00

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_64: add KASan support

2015-02-13 21:21:41 -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

kernel.h: remove ancient __FUNCTION__ hack

2015-02-12 18:54:13 -08:00

hw_breakpoint.c

perf/x86: Remove get_hbp_len and replace with bp_len

2014-12-03 15:14:30 +01:00

i386_ksyms_32.c

sched, x86: Optimize the preempt_schedule() call

2013-09-25 14:23:07 +02:00

i387.c

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

2015-02-16 14:58:12 -08:00

i8237.c

…

i8253.c

…

i8259.c

x86/irq: Fix XT-PIC-XT-PIC in /proc/interrupts

2014-10-28 12:01:08 +01:00

io_delay.c

…

ioport.c

…

iosf_mbi.c

x86/platform/intel/iosf: Add debugfs config option for IOSF

2014-09-19 13:08:43 +02:00

irq_32.c

x86: Clean up current_stack_pointer

2015-01-02 10:22:46 -08:00

irq_64.c

x86: Replace __get_cpu_var uses

2014-08-26 13:45:49 -04:00

irq_work.c

x86: Tell irq work about self IPI support

2014-09-13 18:38:29 +02:00

irq.c

x86/irq: Check for valid irq descriptor in check_irq_vectors_for_cpu_disable()

2015-02-18 15:01:42 +01:00

irqinit.c

x86, irq: Move local APIC related code from io_apic.c into vector.c

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

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-bzimage64: fix sparse warnings

2014-10-14 02:18:21 +02:00

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

x86/spinlocks/paravirt: Fix memory corruption on unlock

2015-02-18 14:53:49 +01:00

kvmclock.c

x86, kvm: Clear paravirt_enabled on KVM guests for espfix32's benefit

2014-12-10 12:49:39 +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

livepatch.c

livepatch: kernel: add support for live patching

2014-12-22 15:40:49 +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

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

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

Makefile

kasan: enable stack instrumentation

2015-02-13 21:21:41 -08:00

mcount_64.S

ftrace/fgraph/x86: Have prepare_ftrace_return() take ip as first parameter

2014-12-01 14:08:58 -05:00

mmconf-fam10h_64.c

x86: delete __cpuinit usage from all x86 files

2013-07-14 19:36:56 -04:00

module.c

Revert "x86/mm/ASLR: Propagate base load address calculation"

2015-03-16 11:18:21 +01:00

mpparse.c

x86, apic: Remove mps_oem_check callback

2014-07-31 08:05:42 -07:00

msr.c

x86, msr: Use seek definitions instead of hard-coded values

2014-10-17 13:40:55 -07:00

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/x86_64: Improve user regs sampling

2015-01-09 11:12:29 +01:00

pmc_atom.c

x86: pmc_atom: Expose contents of PSS

2015-01-20 12:50:14 +01:00

probe_roms.c

…

process_32.c

x86: Store a per-cpu shadow copy of CR4

2015-02-04 12:10:42 +01:00

process_64.c

x86: Store a per-cpu shadow copy of CR4

2015-02-04 12:10:42 +01:00

process.c

x86: Clean up cr4 manipulation

2015-02-04 12:10:41 +01:00

ptrace.c

x86, syscall: Fix _TIF_NOHZ handling in syscall_trace_enter_phase1

2014-11-20 23:01:53 +01:00

pvclock.c

hung_task: add method to reset detector

2013-11-06 09:49:02 +02:00

quirks.c

x86: HPET force enable for e6xx based systems

2014-09-15 17:53:35 -07:00

reboot_fixups_32.c

…

reboot.c

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

2014-12-16 14:08:17 +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

kernel.h: remove ancient __FUNCTION__ hack

2015-02-12 18:54:13 -08:00

setup_percpu.c

x86: Convert a few more per-CPU items to read-mostly ones

2014-11-04 20:13:28 +01:00

setup.c

Revert "x86/mm/ASLR: Propagate base load address calculation"

2015-03-16 11:18:21 +01:00

signal.c

all arches, signal: move restart_block to struct task_struct

2015-02-12 18:54:12 -08:00

smp.c

asmlinkage, x86: Add explicit __visible to arch/x86/*

2014-05-05 16:07:44 -07:00

smpboot.c

x86: Consolidate boot cpu timer setup

2015-01-22 15:10:56 +01:00

stacktrace.c

…

step.c

…

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: Use PTR_ERR_OR_ZERO

2014-10-17 13:40:52 -07:00

sysfb.c

x86/sysfb: Use PTR_ERR_OR_ZERO

2014-10-17 13:40:52 -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_64/vdso: Remove jiffies from the vvar page

2014-10-28 11:22:13 +01:00

tls.c

x86, tls: Interpret an all-zero struct user_desc as "no segment"

2015-01-22 21:45:07 +01:00

tls.h

…

topology.c

hotplug, powerpc, x86: Remove cpu_hotplug_driver_lock()

2013-09-30 19:55:51 +02:00

trace_clock.c

…

tracepoint.c

x86: Make sure IDT is page aligned

2013-07-16 15:14:48 -07:00

traps.c

x86/asm/entry/32: Fix user_mode() misuses

2015-03-10 04:21:51 +01:00

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

x86/tsc: Change Fast TSC calibration failed from error to info

2015-01-23 10:53:52 +01:00

uprobes.c

uprobes/x86: Fix 2-byte opcode table

2015-02-18 20:55:53 +01:00

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

x86-64: Use RIP-relative addressing for most per-CPU accesses

2014-11-04 20:43:14 +01:00

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: Restore orig_ax after vsyscall seccomp

2014-11-10 10:46:35 +01:00

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

Revert "PCI: Add x86_msi.msi_mask_irq() and msix_mask_irq()"

2014-11-11 15:14:30 -07:00

x8664_ksyms_64.c

x86_64: kasan: add interceptors for memset/memmove/memcpy functions

2015-02-13 21:21:41 -08:00

xsave.c

x86/fpu: Avoid math_state_restore() without used_math() in __restore_xstate_sig()

2015-03-13 12:44:28 +01:00