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linux/arch/x86/kernel
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Andy Lutomirski 88640e1dcd x86/speculation/mds: Revert CPU buffer clear on double fault exit 
The double fault ESPFIX path doesn't return to user mode at all --
it returns back to the kernel by simulating a #GP fault.
prepare_exit_to_usermode() will run on the way out of
general_protection before running user code.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@suse.de>
Cc: Frederic Weisbecker <frederic@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jon Masters <jcm@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Fixes: 04dcbdb80578 ("x86/speculation/mds: Clear CPU buffers on exit to user")
Link: http://lkml.kernel.org/r/ac97612445c0a44ee10374f6ea79c222fe22a5c4.1557865329.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-05-16 09:05:11 +02:00
..
acpi
Driver core/kobject patches for 5.2-rc1
2019-05-07 13:01:40 -07:00
apic
Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2019-05-06 15:32:35 -07:00
cpu
Merge branch 'x86-mds-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2019-05-14 07:57:29 -07:00
fpu
x86/fpu: Fault-in user stack if copy_fpstate_to_sigframe() fails
2019-05-06 09:49:40 +02:00
kprobes
x86/kprobes: Make trampoline_handler() global and visible
2019-05-08 13:13:58 +02:00
.gitignore
…
alternative.c
x86/alternatives: Add comment about module removal races
2019-04-30 12:38:01 +02:00
amd_gart_64.c
x86/dma: Remove the x86_dma_fallback_dev hack
2019-04-08 17:52:46 +02:00
amd_nb.c
x86/amd_nb: Add PCI device IDs for family 17h, model 30h
2018-11-07 21:36:09 +01:00
apb_timer.c
…
aperture_64.c
x86/gart: Exclude GART aperture from kcore
2019-03-23 12:11:49 +01:00
apm_32.c
x86/APM: Fix build warning when PROC_FS is not enabled
2018-09-15 10:16:25 +02:00
asm-offsets_32.c
x86/entry/32: Load task stack from x86_tss.sp1 in SYSENTER handler
2018-07-20 01:11:36 +02:00
asm-offsets_64.c
x86/irq/64: Split the IRQ stack into its own pages
2019-04-17 15:37:02 +02:00
asm-offsets.c
x86/kernel: Fix more -Wmissing-prototypes warnings
2018-12-08 12:24:35 +01:00
audit_64.c
…
bootflag.c
…
check.c
x86/headers: Fix -Wmissing-prototypes warning
2018-11-23 07:59:59 +01:00
cpuid.c
x86/cpuid: Allow cpuid_read() to schedule
2018-03-27 12:01:48 +02:00
crash_dump_32.c
…
crash_dump_64.c
x86: Fix various typos in comments
2018-12-03 10:49:13 +01:00
crash.c
x86/kexec/crash: Use struct_size() in vzalloc()
2019-04-05 13:18:38 +02:00
devicetree.c
x86/headers: Fix -Wmissing-prototypes warning
2018-11-23 07:59:59 +01:00
doublefault.c
…
dumpstack_32.c
x86/irq/32: Rename hard/softirq_stack to hard/softirq_stack_ptr
2019-04-17 15:24:18 +02:00
dumpstack_64.c
x86/irq/64: Rename irq_stack_ptr to hardirq_stack_ptr
2019-04-17 15:27:10 +02:00
dumpstack.c
x86/process: Don't mix user/kernel regs in 64bit __show_regs()
2018-09-06 14:33:12 +02:00
e820.c
Merge branch 'akpm' (patches from Andrew)
2019-03-12 10:39:53 -07:00
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/gpu: add ElkhartLake to gen11 early quirks
2019-04-01 10:29:32 -07:00
ebda.c
…
eisa.c
x86/EISA: Don't probe EISA bus for Xen PV guests
2018-09-11 23:36:50 +02:00
espfix_64.c
x86/espfix: Document use of _PAGE_GLOBAL
2018-04-09 18:27:33 +02:00
ftrace_32.S
…
ftrace_64.S
x86/ftrace: Do not call function graph from dynamic trampolines
2018-12-19 22:43:37 -05:00
ftrace.c
x86/ftrace: Use vmalloc special flag
2019-04-30 12:38:00 +02:00
head32.c
x86/boot: Mostly revert commit ae7e1238e68f2a ("Add ACPI RSDP address to setup_header")
2018-11-20 09:43:10 +01:00
head64.c
x86/boot: Mostly revert commit ae7e1238e68f2a ("Add ACPI RSDP address to setup_header")
2018-11-20 09:43:10 +01:00
head_32.S
x86/pgtable/32: Allocate 8k page-tables when PTI is enabled
2018-07-20 01:11:41 +02:00
head_64.S
x86/irq/64: Split the IRQ stack into its own pages
2019-04-17 15:37:02 +02:00
hpet.c
x86/hpet: Prevent potential NULL pointer dereference
2019-03-21 12:24:38 +01:00
hw_breakpoint.c
x86/hw_breakpoints: Make default case in hw_breakpoint_arch_parse() return an error
2019-03-22 17:08:17 +01:00
i8237.c
x86/i8237: Register device based on FADT legacy boot flag
2018-04-27 16:44:29 +02:00
i8253.c
…
i8259.c
x86: Don't include linux/irq.h from asm/hardirq.h
2018-08-05 09:53:13 +02:00
idt.c
x86/exceptions: Disconnect IST index and stack order
2019-04-17 15:01:09 +02:00
ima_arch.c
x86/ima: add missing include
2019-04-10 16:41:00 -04:00
io_delay.c
…
ioport.c
x86/ioport: add ksys_ioperm() helper; remove in-kernel calls to sys_ioperm()
2018-04-02 20:16:12 +02:00
irq_32.c
x86/irq/32: Handle irq stack allocation failure proper
2019-04-17 15:31:42 +02:00
irq_64.c
x86/irq/64: Remove stack overflow debug code
2019-04-17 15:41:48 +02:00
irq_work.c
…
irq.c
x86: Don't include linux/irq.h from asm/hardirq.h
2018-08-05 09:53:13 +02:00
irqflags.S
x86/paravirt: Make native_save_fl() extern inline
2018-07-03 10:56:27 +02:00
irqinit.c
x86/irq/32: Handle irq stack allocation failure proper
2019-04-17 15:31:42 +02:00
itmt.c
…
jailhouse.c
x86/headers: Fix -Wmissing-prototypes warning
2018-11-23 07:59:59 +01:00
jump_label.c
x86/jump-label: Remove support for custom text poker
2019-04-30 12:37:55 +02:00
kdebugfs.c
…
kexec-bzimage64.c
Merge branch 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2019-03-10 17:32:04 -07:00
kgdb.c
x86/kgdb: Avoid redundant comparison of patched code
2019-04-30 12:37:53 +02:00
ksysfs.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
kvm.c
x86/kvm: Make steal_time visible
2019-04-19 17:58:57 +02:00
kvmclock.c
x86: kvmguest: use TSC clocksource if invariant TSC is exposed
2019-02-20 22:48:52 +01:00
ldt.c
x86: Convert some slow-path static_cpu_has() callers to boot_cpu_has()
2019-04-08 12:13:34 +02:00
livepatch.c
…
machine_kexec_32.c
x86/kexec: Allocate 8k PGDs for PTI
2018-07-30 13:53:48 +02:00
machine_kexec_64.c
x86/kdump: Export the SME mask to vmcoreinfo
2019-01-11 16:09:25 +01:00
Makefile
jump_label: move 'asm goto' support test to Kconfig
2019-01-06 09:46:51 +09:00
mmconf-fam10h_64.c
…
module.c
x86/modules: Avoid breaking W^X while loading modules
2019-04-30 12:37:55 +02:00
mpparse.c
x86/mm: Don't leak kernel addresses
2019-03-19 12:10:56 +01:00
msr.c
x86: Clean up 'sizeof x' => 'sizeof(x)'
2018-10-29 07:13:28 +01:00
nmi_selftest.c
…
nmi.c
Merge branch 'x86-mds-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2019-05-14 07:57:29 -07:00
paravirt_patch_32.c
x86/paravirt: Remove unused _paravirt_ident_32
2018-10-30 09:55:31 +01:00
paravirt_patch_64.c
x86/paravirt: Remove unused _paravirt_ident_32
2018-10-30 09:55:31 +01:00
paravirt-spinlocks.c
x86/paravirt: Use a single ops structure
2018-09-03 16:50:35 +02:00
paravirt.c
x86: Convert some slow-path static_cpu_has() callers to boot_cpu_has()
2019-04-08 12:13:34 +02:00
pci-calgary_64.c
x86/calgary: remove the mapping_error dma_map_ops method
2018-12-06 06:56:46 -08:00
pci-dma.c
x86/dma: Remove the x86_dma_fallback_dev hack
2019-04-08 17:52:46 +02:00
pci-iommu_table.c
x86/iommu: Use NULL instead of 0
2018-08-02 14:33:19 +02:00
pci-swiotlb.c
dma-direct: merge swiotlb_dma_ops into the dma_direct code
2018-12-13 21:06:17 +01:00
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: Support outputting XMM registers
2019-04-16 12:19:36 +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
…
probe_roms.c
…
process_32.c
Merge branch 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2019-05-07 10:24:10 -07:00
process_64.c
Merge branch 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2019-05-07 10:24:10 -07:00
process.c
Merge branch 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2019-05-07 10:24:10 -07:00
process.h
x86/speculation: Change misspelled STIPB to STIBP
2018-12-06 11:49:15 +01:00
ptrace.c
x86/fsgsbase/64: Fix the base write helper functions
2018-12-18 14:26:09 +01:00
pvclock.c
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
quirks.c
x86/headers: Fix -Wmissing-prototypes warning
2018-11-23 07:59:59 +01:00
reboot_fixups_32.c
…
reboot.c
Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2019-05-06 15:32:35 -07:00
relocate_kernel_32.S
…
relocate_kernel_64.S
x86/kexec: Make kexec (mostly) work in 5-level paging mode
2018-01-31 08:39:40 +01:00
resource.c
…
rtc.c
x86: Convert x86_platform_ops to timespec64
2018-05-19 14:03:14 +02:00
setup_percpu.c
x86/irq/64: Split the IRQ stack into its own pages
2019-04-17 15:37:02 +02:00
setup.c
Merge branch 'x86-kdump-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2019-05-06 16:11:45 -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-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2019-05-07 10:24:10 -07:00
smp.c
x86/irq: Let interrupt handlers set kvm_cpu_l1tf_flush_l1d
2018-08-05 09:53:13 +02:00
smpboot.c
Merge branch 'x86-topology-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2019-05-06 16:33:06 -07:00
stacktrace.c
x86/stacktrace: Use common infrastructure
2019-04-29 12:37:57 +02:00
step.c
…
sys_x86_64.c
x86/compat: Adjust in_compat_syscall() to generic code under !COMPAT
2018-11-01 12:59:25 +01:00
sysfb_efi.c
x86/kernel: Fix more -Wmissing-prototypes warnings
2018-12-08 12:24:35 +01:00
sysfb_simplefb.c
…
sysfb.c
…
tboot.c
iommu/vtd: Cleanup dma_remapping.h header
2018-11-12 14:22:56 +01:00
tce_64.c
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
time.c
Merge branch 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-10-23 19:07:25 +01:00
tls.c
…
tls.h
…
topology.c
x86/topology: Make DEBUG_HOTPLUG_CPU0 pr_info() more descriptive
2019-04-19 19:42:57 +02:00
trace_clock.c
…
tracepoint.c
x86/kernel: Fix more -Wmissing-prototypes warnings
2018-12-08 12:24:35 +01:00
traps.c
x86/speculation/mds: Revert CPU buffer clear on double fault exit
2019-05-16 09:05:11 +02:00
tsc_msr.c
x86/cpu: Sanitize FAM6_ATOM naming
2018-10-02 10:14:32 +02:00
tsc_sync.c
…
tsc.c
Power management updates for 5.2-rc1
2019-05-06 19:40:31 -07:00
umip.c
signal/x86: Use force_sig_fault where appropriate
2018-09-21 15:30:54 +02:00
unwind_frame.c
x86/unwind: Handle NULL pointer calls better in frame unwinder
2019-03-06 23:03:26 +01:00
unwind_guess.c
…
unwind_orc.c
x86/unwind: Add hardcoded ORC entry for NULL
2019-03-06 23:03:26 +01:00
uprobes.c
x86/kernel: Mark expected switch-case fall-throughs
2019-01-26 11:19:13 +01:00
verify_cpu.S
…
vm86_32.c
x86: Convert some slow-path static_cpu_has() callers to boot_cpu_has()
2019-04-08 12:13:34 +02:00
vmlinux.lds.S
Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2019-05-06 16:13:31 -07:00
vsmp_64.c
x86/vsmp: Remove dependency on pv_irq_ops
2018-11-06 21:35:11 +01:00
x86_init.c
x86/acpi, x86/boot: Take RSDP address for boot params if available
2018-10-10 10:44:22 +02:00