Al Viro bd1c149aa9 Introduce [compat_]save_altstack_ex() to unbreak x86 SMAP ...

For performance reasons, when SMAP is in use, SMAP is left open for an
entire put_user_try { ... } put_user_catch(); block, however, calling
__put_user() in the middle of that block will close SMAP as the
STAC..CLAC constructs intentionally do not nest.

Furthermore, using __put_user() rather than put_user_ex() here is bad
for performance.

Thus, introduce new [compat_]save_altstack_ex() helpers that replace
__[compat_]save_altstack() for x86, being currently the only
architecture which supports put_user_try { ... } put_user_catch().

Reported-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: <stable@vger.kernel.org> # v3.8+
Link: http://lkml.kernel.org/n/tip-es5p6y64if71k8p5u08agv9n@git.kernel.org

2013-09-01 14:16:33 -07:00

..

acpi

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

2013-07-18 17:39:05 -07:00

apic

x86: delete __cpuinit usage from all x86 files

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

cpu

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

2013-08-19 09:18:29 -07:00

kprobes

kprobes: Fix arch_prepare_kprobe to handle copy insn failures

2013-06-20 14:25:48 +02:00

.gitignore

…

alternative.c

x86, cpu: Expand cpufeature facility to include cpu bugs

2013-04-02 10:12:52 -07:00

amd_gart_64.c

x86, mm: use pfn_range_is_mapped() with gart

2012-11-17 11:59:10 -08:00

amd_nb.c

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

2013-04-30 08:42:45 -07:00

apb_timer.c

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

2013-02-19 20:11:07 -08:00

aperture_64.c

x86/mm/gart: Drop unnecessary check

2013-04-16 10:54:40 +02:00

apm_32.c

cpuidle: remove en_core_tk_irqen flag

2013-04-23 13:45:22 +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

x86, um/x86: switch to generic sys_execve and kernel_execve

2012-09-30 22:53:32 -04:00

audit_64.c

…

bootflag.c

…

check.c

x86: kernel/check.c simple_strtoul cleanup

2012-05-15 15:36:41 -07:00

cpuid.c

x86: delete __cpuinit usage from all x86 files

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

crash_dump_32.c

x86: remove the second argument of k[un]map_atomic()

2012-03-20 21:48:15 +08:00

crash_dump_64.c

…

crash.c

x86/kexec: crash_vmclear_local_vmcss needs __rcu

2012-12-11 19:55:23 -02:00

devicetree.c

x86: delete __cpuinit usage from all x86 files

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

doublefault.c

x86: Extend #DF debugging aid to 64-bit

2013-05-13 13:42:44 -07:00

dumpstack_32.c

dump_stack: unify debug information printed by show_regs()

2013-04-30 17:04:02 -07:00

dumpstack_64.c

dump_stack: unify debug information printed by show_regs()

2013-04-30 17:04:02 -07:00

dumpstack.c

dump_stack: consolidate dump_stack() implementations and unify their behaviors

2013-04-30 17:04:02 -07:00

e820.c

x86, mm: Let "memmap=" take more entries one time

2012-11-17 11:59:51 -08:00

early_printk.c

early_printk: consolidate random copies of identical code

2013-04-29 18:28:13 -07:00

early-quirks.c

x86/iommu/vt-d: Expand interrupt remapping quirk to cover x58 chipset

2013-07-23 11:29:30 +02:00

entry_32.S

x86, trace: Add irq vector tracepoints

2013-06-20 22:25:34 -07:00

entry_64.S

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

2013-07-02 16:31:49 -07:00

ftrace.c

x86/ftrace: Use __pa_symbol instead of __pa on C visible symbols

2012-11-16 16:42:09 -08:00

head32.c

x86: Merge early kernel reserve for 32bit and 64bit

2013-01-29 19:32:58 -08:00

head64.c

x86: Fix bit corruption at CPU resume time

2013-05-20 11:36:03 -07:00

head_32.S

x86: delete __cpuinit usage from all x86 files

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

head_64.S

x86: Make sure IDT is page aligned

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

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

x86, hpet: Introduce x86_msi_ops.setup_hpet_msi

2013-01-28 10:48:30 +01:00

hw_breakpoint.c

ptrace/x86: flush_ptrace_hw_breakpoint() shoule clear the virtual debug registers

2013-07-09 10:33:26 -07:00

i386_ksyms_32.c

x86-32: Add support for 64bit get_user()

2013-02-07 15:07:28 -08:00

i387.c

x86, fpu: correct the asm constraints for fxsave, unbreak mxcsr.daz

2013-07-26 09:11:56 -07:00

i8237.c

…

i8253.c

…

i8259.c

x86/irq/i8259: Fix incorrect comment

2012-08-22 09:34:24 +02:00

io_delay.c

…

ioport.c

x86: get rid of pt_regs argument of iopl(2)

2013-02-03 18:16:24 -05:00

irq_32.c

x86: delete __cpuinit usage from all x86 files

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

irq_64.c

x86: Add stack top margin for stack overflow checking

2011-12-07 09:27:11 +01:00

irq_work.c

x86, trace: Add irq vector tracepoints

2013-06-20 22:25:34 -07:00

irq.c

trace,x86: Move creation of irq tracepoints from apic.c to irq.c

2013-06-21 10:33:28 -04:00

irqinit.c

KVM: VMX: Register a new IPI for posted interrupt

2013-04-16 16:32:39 -03:00

jump_label.c

jump_label, x86: Fix section mismatch

2011-12-06 20:41:02 +01:00

kdebugfs.c

arch/x86/kernel/kdebugfs.c: Ensure a consistent return value in error case

2012-07-26 15:07:20 +02:00

kgdb.c

kgdb,x86: fix warning about unused variable

2012-10-12 06:37:34 -05:00

kvm.c

x86: delete __cpuinit usage from all x86 files

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

kvmclock.c

x86: delete __cpuinit usage from all x86 files

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

ldt.c

Disintegrate asm/system.h for X86

2012-03-28 18:11:12 +01:00

machine_kexec_32.c

Disintegrate asm/system.h for X86

2012-03-28 18:11:12 +01:00

machine_kexec_64.c

x86, kexec, 64bit: Only set ident mapping for ram.

2013-01-29 15:26:35 -08:00

Makefile

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

2013-07-02 16:31:49 -07:00

microcode_amd_early.c

x86, microcode, AMD: Fix early microcode loading

2013-08-12 18:32:45 +02:00

microcode_amd.c

x86, microcode, AMD: Fix early microcode loading

2013-08-12 18:32:45 +02:00

microcode_core_early.c

x86: delete __cpuinit usage from all x86 files

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

microcode_core.c

x86: delete __cpuinit usage from all x86 files

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

microcode_intel_early.c

x86: delete __cpuinit usage from all x86 files

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

microcode_intel_lib.c

x86/microcode_intel_lib.c: Early update ucode on Intel's CPU

2013-01-31 13:19:14 -08:00

microcode_intel.c

x86/microcode_intel.h: Define functions and macros for early loading ucode

2013-01-31 13:18:50 -08:00

mmconf-fam10h_64.c

x86: delete __cpuinit usage from all x86 files

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

module.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial

2012-07-24 13:34:56 -07:00

mpparse.c

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

2012-05-29 20:14:53 -07:00

msr.c

x86: delete __cpuinit usage from all x86 files

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

nmi_selftest.c

x86/nmi: Clean up register_nmi_handler() usage

2012-06-20 14:23:17 +02:00

nmi.c

perf/x86: Fix incorrect use of do_div() in NMI warning

2013-07-12 14:13:04 +02:00

paravirt_patch_32.c

…

paravirt_patch_64.c

…

paravirt-spinlocks.c

…

paravirt.c

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

2013-04-30 08:41:21 -07:00

pci-calgary_64.c

x86/debug: Add KERN_<LEVEL> to bare printks, convert printks to pr_<level>

2012-06-06 09:17:22 +02:00

pci-dma.c

x86/dma-debug: Bump PREALLOC_DMA_DEBUG_ENTRIES

2013-01-24 17:34:18 +01:00

pci-iommu_table.c

…

pci-nommu.c

X86: integrate CMA with DMA-mapping subsystem

2012-05-21 15:09:38 +02:00

pci-swiotlb.c

X86 & IA64: adapt for dma_map_ops changes

2012-03-28 16:36:31 +02:00

pcspeaker.c

…

perf_regs.c

perf: Fix off by one test in perf_reg_value()

2012-09-19 17:08:40 +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

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

2013-07-02 16:25:06 -07:00

process_64.c

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

2013-07-02 16:25:06 -07:00

process.c

x86: delete __cpuinit usage from all x86 files

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

ptrace.c

ptrace/x86: cleanup ptrace_set_debugreg()

2013-07-09 10:33:26 -07:00

pvclock.c

x86/kvm: Fix pvclock vsyscall fixmap

2013-02-28 08:50:11 +02:00

quirks.c

x86, quirks: Shut-up a long-standing gcc warning

2013-04-02 16:03:34 -07:00

reboot_fixups_32.c

…

reboot.c

reboot: move arch/x86 reboot= handling to generic kernel

2013-07-09 10:33:29 -07:00

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

…

rtc.c

x86: Increase precision of x86_platform.get/set_wallclock()

2013-05-28 14:00:59 -07:00

setup_percpu.c

x86: Add read_mostly declaration/definition to variables from smp.h

2012-06-14 12:42:11 +02:00

setup.c

x86: delete __cpuinit usage from all x86 files

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

signal.c

Introduce [compat_]save_altstack_ex() to unbreak x86 SMAP

2013-09-01 14:16:33 -07:00

smp.c

x86/tracing: Add irq_enter/exit() in smp_trace_reschedule_interrupt()

2013-07-02 09:52:31 +02:00

smpboot.c

x86: delete __cpuinit usage from all x86 files

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

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, syscall: Re-fix typo in comment

2011-11-18 16:25:07 -08:00

syscall_64.c

x32: If configured, add x32 system calls to system call tables

2012-02-20 12:52:06 -08:00

tboot.c

x86: delete __cpuinit usage from all x86 files

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

tce_64.c

Disintegrate asm/system.h for X86

2012-03-28 18:11:12 +01:00

test_nx.c

…

test_rodata.c

x86, extable: Remove open-coded exception table entries in arch/x86/kernel/test_rodata.c

2012-04-20 13:51:38 -07:00

time.c

MCA: delete all remaining traces of microchannel bus support.

2012-05-17 19:06:13 -04:00

tls.c

make SYSCALL_DEFINE<n>-generated wrappers do asmlinkage_protect

2013-03-03 22:58:33 -05:00

tls.h

…

topology.c

x86, topology: Debug CPU0 hotplug

2012-11-14 15:28:11 -08:00

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: Make sure IDT is page aligned

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

tsc_sync.c

x86: delete __cpuinit usage from all x86 files

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

tsc.c

x86: delete __cpuinit usage from all x86 files

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

uprobes.c

uretprobes/x86: Hijack return address

2013-04-13 15:31:55 +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: Drop always empty .text..page_aligned section

2013-03-11 15:07:56 +01:00

vsmp_64.c

x86/apic/x2apic: Limit the vector reservation to the user specified mask

2012-07-06 11:00:22 +02:00

vsyscall_64.c

x86: delete __cpuinit usage from all x86 files

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

vsyscall_emu_64.S

…

vsyscall_trace.h

…

x86_init.c

x86: delete __cpuinit usage from all x86 files

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

x8664_ksyms_64.c

x86: Improve __phys_addr performance by making use of carry flags and inlining

2012-11-16 16:42:08 -08:00

xsave.c

x86: delete __cpuinit usage from all x86 files

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