iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
linux/arch/x86/kernel
History
Andy Lutomirski 61f01dd941 x86_64, asm: Work around AMD SYSRET SS descriptor attribute issue 
AMD CPUs don't reinitialize the SS descriptor on SYSRET, so SYSRET with
SS == 0 results in an invalid usermode state in which SS is apparently
equal to __USER_DS but causes #SS if used.

Work around the issue by setting SS to __KERNEL_DS __switch_to, thus
ensuring that SYSRET never happens with SS set to NULL.

This was exposed by a recent vDSO cleanup.

Fixes: e7d6eefaaa44 x86/vdso32/syscall.S: Do not load __USER32_DS to %ss
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Peter Anvin <hpa@zytor.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Denys Vlasenko <vda.linux@googlemail.com>
Cc: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-04-26 17:57:38 -07:00
..
acpi
Initial ACPI support for arm64:
2015-04-24 08:23:45 -07:00
apic
This is the final removal (after several years!) of the obsolete cpus_*
2015-04-20 10:19:03 -07:00
cpu
x86_64, asm: Work around AMD SYSRET SS descriptor attribute issue
2015-04-26 17:57:38 -07:00
kprobes
Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2015-04-14 14:37:47 -07:00
.gitignore
…
alternative.c
x86/alternatives: Guard NOPs optimization
2015-04-06 09:24:09 +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/entry/32: Document the 32-bit SYSENTER "emergency stack" better
2015-03-17 09:25:29 +01:00
asm-offsets_64.c
x86/asm/entry/64/compat: Change the 32-bit sysenter code to use sp0
2015-03-06 08:32:58 +01:00
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/asm/entry: Change all 'user_mode_vm()' calls to 'user_mode()'
2015-03-23 11:14:17 +01:00
devicetree.c
x86/mm: Use early_memunmap() instead of early_iounmap()
2015-02-24 15:58:06 +01:00
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-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2015-04-13 13:23:34 -07:00
dumpstack_64.c
x86/kernel: Use kstack_end() in dumpstack_64.c
2015-02-23 18:37:13 +01:00
dumpstack.c
Merge branch 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2015-04-13 13:23:34 -07:00
e820.c
Merge branch 'x86-pmem-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2015-04-18 11:42:49 -04:00
early_printk.c
TTY/Serial patches for 4.1-rc1
2015-04-21 09:33:10 -07:00
early-quirks.c
drm/i915/skl: Add the additional graphics stolen sizes
2014-09-24 14:47:39 +02:00
entry_32.S
x86/asm/entry/32: Tidy up JNZ instructions after TESTs
2015-04-11 10:40:02 +02:00
entry_64.S
x86_64, asm: Work around AMD SYSRET SS descriptor attribute issue
2015-04-26 17:57:38 -07:00
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 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2015-04-13 13:19:10 -07:00
head_32.S
x86/asm/boot: Use already defined KEEP_SEGMENTS macro in head_{32,64}.S
2015-02-19 10:05:04 +01:00
head_64.S
x86/asm: Optimize unnecessarily wide TEST instructions
2015-03-07 11:12:43 +01:00
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
x86/fpu: Load xsave pointer *after* initialization
2015-04-17 10:15:47 +02:00
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
x86/asm/entry: Rename 'init_tss' to 'cpu_tss'
2015-03-06 08:32:58 +01:00
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/asm/entry: Change all 'user_mode_vm()' calls to 'user_mode()'
2015-03-23 11:14:17 +01:00
irq_64.c
x86/asm/entry: Change all 'user_mode_vm()' calls to 'user_mode()'
2015-03-23 11:14:17 +01:00
irq_work.c
x86: Tell irq work about self IPI support
2014-09-13 18:38:29 +02:00
irq.c
x86: fix up obsolete cpu function usage.
2015-03-05 15:25:05 +10:30
irqinit.c
x86/asm/entry/irq: Simplify interrupt dispatch table (IDT) layout
2015-04-08 09:02:13 +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-bzimage64: fix sparse warnings
2014-10-14 02:18:21 +02:00
kgdb.c
Linux 4.0-rc7
2015-04-08 09:01:54 +02:00
ksysfs.c
x86: ksysfs.c build fix
2014-01-03 14:37:13 +00:00
kvm.c
watchdog: introduce the hardlockup_detector_disable() function
2015-04-14 16:48:59 -07:00
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
Merge branch 'x86-pmem-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2015-04-18 11:42:49 -04:00
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
x86/mm/KASLR: Propagate KASLR status to kernel proper
2015-04-03 15:26:15 +02:00
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
x86: expose number of page table levels on Kconfig level
2015-04-14 16:49:02 -07:00
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: Report regs_user->ax too in get_regs_user()
2015-04-11 13:08:53 +02:00
pmc_atom.c
x86: pmc_atom: Expose contents of PSS
2015-01-20 12:50:14 +01:00
pmem.c
x86/mm: Add support for the non-standard protected e820 type
2015-04-01 17:02:43 +02:00
probe_roms.c
…
process_32.c
x86/asm/entry: Get rid of KERNEL_STACK_OFFSET
2015-03-24 19:42:38 +01:00
process_64.c
x86_64, asm: Work around AMD SYSRET SS descriptor attribute issue
2015-04-26 17:57:38 -07:00
process.c
Merge branch 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2015-04-13 13:24:23 -07:00
ptrace.c
x86/asm/entry: Change all 'user_mode_vm()' calls to 'user_mode()'
2015-03-23 11:14:17 +01:00
pvclock.c
x86: kvm: Revert "remove sched notifier for cross-cpu migrations"
2015-03-23 20:22:48 -03:00
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/reboot: Add ASRock Q1900DC-ITX mainboard reboot quirk
2015-04-01 14:08:09 +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: 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
Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2015-04-13 13:31:32 -07:00
signal.c
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2015-04-18 11:31:11 -04:00
smp.c
asmlinkage, x86: Add explicit __visible to arch/x86/*
2014-05-05 16:07:44 -07:00
smpboot.c
Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2015-04-14 13:36:04 -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/mm: Improve AMD Bulldozer ASLR workaround
2015-03-31 10:01:17 +02:00
syscall_32.c
x86/compat: Merge native and compat 32-bit syscall tables
2015-03-04 06:16:21 +01:00
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
treewide: Fix typo in printk messages
2015-03-06 23:05:39 +01:00
time.c
x86/asm/entry: Change all 'user_mode_vm()' calls to 'user_mode()'
2015-03-23 11:14:17 +01:00
tls.c
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
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
Merge branch 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2015-04-14 13:58:48 -07:00
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
x86/asm/entry: Change all 'user_mode_vm()' calls to 'user_mode()'
2015-03-23 11:14:17 +01:00
verify_cpu.S
…
vm86_32.c
x86/asm/entry: Rename 'init_tss' to 'cpu_tss'
2015-03-06 08:32:58 +01:00
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
time: Rename timekeeper::tkr to timekeeper::tkr_mono
2015-03-27 09:45:06 +01:00
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: Kill eager_fpu_init_bp()
2015-03-23 10:14:00 +01:00