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David Kaplan 3b1ce482e2 x86/cpu: Fix check for RDPKRU in __show_regs() 
commit b53c6bd5d271d023857174b8fd3e32f98ae51372 upstream.

cpu_feature_enabled(X86_FEATURE_OSPKE) does not necessarily reflect
whether CR4.PKE is set on the CPU.  In particular, they may differ on
non-BSP CPUs before setup_pku() is executed.  In this scenario, RDPKRU
will #UD causing the system to hang.

Fix by checking CR4 for PKE enablement which is always correct for the
current CPU.

The scenario happens by inserting a WARN* before setup_pku() in
identiy_cpu() or some other diagnostic which would lead to calling
__show_regs().

  [ bp: Massage commit message. ]

Signed-off-by: David Kaplan <david.kaplan@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20240421191728.32239-1-bp@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-05-02 16:32:42 +02:00
..
acpi
ACPI: CPPC: enable AMD CPPC V2 support for family 17h processors
2024-03-26 18:19:36 -04:00
apic
x86/bugs: Rename various 'ia32_cap' variables to 'x86_arch_cap_msr'
2024-04-17 11:19:36 +02:00
cpu
x86/cpufeatures: Fix dependencies for GFNI, VAES, and VPCLMULQDQ
2024-04-27 17:11:38 +02:00
fpu
x86/fpu: Keep xfd_state in sync with MSR_IA32_XFD
2024-04-03 15:28:52 +02:00
kprobes
kprobes/x86: Use copy_from_kernel_nofault() to read from unsafe address
2024-04-03 15:28:52 +02:00
.gitignore
…
alternative.c
x86/alternatives: Disable interrupts and sync when optimizing NOPs in place
2024-01-01 12:42:47 +00:00
amd_gart_64.c
x86/mm: Remove P*D_PAGE_MASK and P*D_PAGE_SIZE macros
2022-12-15 10:37:27 -08:00
amd_nb.c
x86/amd_nb: Use Family 19h Models 60h-7Fh Function 4 IDs
2023-11-20 11:59:38 +01:00
aperture_64.c
x86: Fix various duplicate-word comment typos
2022-08-15 19:17:52 +02:00
apm_32.c
x86/APM: drop the duplicate APM_MINOR_DEV macro
2023-07-30 14:00:32 +02:00
asm-offsets_32.c
…
asm-offsets_64.c
x86: Fixup asm-offsets duplicate
2022-10-17 16:41:06 +02:00
asm-offsets.c
x86/smpboot: Remove initial_stack on 64-bit
2023-03-21 13:35:53 +01:00
audit_64.c
x86/audit: Fix -Wmissing-variable-declarations warning for ia32_xyz_class
2023-08-30 10:11:16 +02:00
bootflag.c
…
callthunks.c
x86,static_call: Fix static-call vs return-thunk
2023-09-22 18:58:24 +02:00
cet.c
x86/ibt: Convert IBT selftest to asm
2023-08-17 17:07:09 +02:00
cfi.c
x86: Add support for CONFIG_CFI_CLANG
2022-09-26 10:13:16 -07:00
check.c
…
cpuid.c
x86/cpuid: make cpuid_class a static const structure
2023-08-05 08:31:41 +02:00
crash_core_32.c
…
crash_core_64.c
…
crash_dump_32.c
…
crash_dump_64.c
use less confusing names for iov_iter direction initializers
2022-11-25 13:01:55 -05:00
crash.c
ARM:
2023-09-07 13:52:20 -07:00
devicetree.c
x86/apic: Make some APIC init functions bool
2023-08-09 11:58:20 -07:00
doublefault_32.c
x86: Avoid missing-prototype warnings for doublefault code
2023-05-18 11:56:18 -07:00
dumpstack_32.c
x86/percpu: Move irq_stack variables next to current_task
2022-10-17 16:41:05 +02:00
dumpstack_64.c
x86/percpu: Move irq_stack variables next to current_task
2022-10-17 16:41:05 +02:00
dumpstack.c
x86/show_trace_log_lvl: Ensure stack pointer is aligned, again
2023-05-16 06:31:04 -07:00
e820.c
x86/e820: Don't reserve SETUP_RNG_SEED in e820
2024-03-06 14:48:42 +00:00
early_printk.c
x86/earlyprintk: Clean up pciserial
2022-08-29 12:19:25 +02:00
early-quirks.c
…
ebda.c
…
eisa.c
x86/sev: Skip ROM range scans and validation for SEV-SNP guests
2024-04-03 15:29:03 +02:00
espfix_64.c
x86/espfix: Use get_random_long() rather than archrandom
2022-10-31 20:12:50 +01:00
ftrace_32.S
x86/ftrace: Enable HAVE_FUNCTION_GRAPH_RETVAL
2023-06-20 18:38:38 -04:00
ftrace_64.S
x86/ftrace: Enable HAVE_FUNCTION_GRAPH_RETVAL
2023-06-20 18:38:38 -04:00
ftrace.c
x86/ftrace: Remove unsued extern declaration ftrace_regs_caller_ret()
2023-07-10 21:38:13 -04:00
head32.c
x86: Add dummy prototype for mk_early_pgtbl_32()
2023-05-18 11:56:16 -07:00
head64.c
x86/head/64: Move the __head definition to <asm/init.h>
2024-04-10 16:36:07 +02:00
head_32.S
x86/smpboot: Restrict soft_restart_cpu() to SEV
2023-05-15 13:44:50 +02:00
head_64.S
x86/smpboot/64: Handle X2APIC BIOS inconsistency gracefully
2024-01-01 12:42:47 +00:00
hpet.c
rtc: Add support for configuring the UIP timeout for RTC reads
2024-01-31 16:18:56 -08:00
hw_breakpoint.c
x86/amd: Cache debug register values in percpu variables
2023-01-31 20:09:26 +01:00
i8237.c
…
i8253.c
…
i8259.c
x86/i8259: Skip probing when ACPI/MADT advertises PCAT compatibility
2023-10-27 20:36:49 +02:00
ibt_selftest.S
x86/ibt: Convert IBT selftest to asm
2023-08-17 17:07:09 +02:00
idt.c
x86/entry: Convert INT 0x80 emulation to IDTENTRY
2023-12-13 18:45:02 +01:00
io_delay.c
…
ioport.c
…
irq_32.c
x86/percpu: Move irq_stack variables next to current_task
2022-10-17 16:41:05 +02:00
irq_64.c
x86/percpu: Move irq_stack variables next to current_task
2022-10-17 16:41:05 +02:00
irq_work.c
x86/apic: Wrap IPI calls into helper functions
2023-08-09 12:00:55 -07:00
irq.c
x86/apic: Nuke ack_APIC_irq()
2023-08-09 11:58:34 -07:00
irqflags.S
…
irqinit.c
x86/i8259: Mark legacy PIC interrupts with IRQ_LEVEL
2023-01-16 17:24:56 +01:00
itmt.c
x86/sched/itmt: Give all SMT siblings of a core the same priority
2023-05-08 10:58:38 +02:00
jailhouse.c
x86/apic: Remove the pointless APIC version check
2023-08-09 11:58:19 -07:00
jump_label.c
jump_label: make initial NOP patching the special case
2022-06-24 09:48:55 +02:00
kdebugfs.c
…
kexec-bzimage64.c
docs: move x86 documentation into Documentation/arch/
2023-03-30 12:58:51 -06:00
kgdb.c
x86/kgdb: Fix a kerneldoc warning when build with W=1
2023-09-24 11:00:13 +02:00
ksysfs.c
…
kvm.c
* Rework apic callbacks, getting rid of unnecessary ones and
2023-08-30 10:44:46 -07:00
kvmclock.c
x86/kvm: Do not try to disable kvmclock if it was not enabled
2024-01-25 15:35:48 -08:00
ldt.c
x86: allow get_locked_pte() to fail
2023-06-19 16:19:10 -07:00
machine_kexec_32.c
…
machine_kexec_64.c
x86/kexec: remove unnecessary arch_kexec_kernel_image_load()
2023-04-08 13:45:38 -07:00
Makefile
Add x86 shadow stack support
2023-08-31 12:20:12 -07:00
mmconf-fam10h_64.c
…
module.c
x86/alternative: Rename apply_ibt_endbr()
2023-07-10 09:52:23 +02:00
mpparse.c
Revert "x86/mpparse: Register APIC address only once"
2024-04-10 16:36:06 +02:00
msr.c
x86/MSR: make msr_class a static const structure
2023-08-05 08:31:42 +02:00
nmi_selftest.c
x86/apic: Wrap IPI calls into helper functions
2023-08-09 12:00:55 -07:00
nmi.c
x86/nmi: Fix the inverse "in NMI handler" check
2024-04-03 15:28:21 +02:00
paravirt-spinlocks.c
…
paravirt.c
x86/xen: move paravirt lazy code
2023-09-19 07:04:49 +02:00
pci-dma.c
x86: always initialize xen-swiotlb when xen-pcifront is enabling
2023-07-31 17:54:27 +02:00
pcspeaker.c
…
perf_regs.c
…
platform-quirks.c
x86/quirks: Include linux/pnp.h for arch_pnpbios_disabled()
2023-05-18 11:56:18 -07:00
pmem.c
x86/pmem: Fix platform-device leak in error path
2022-06-20 18:01:16 +02:00
probe_roms.c
x86/sev: Skip ROM range scans and validation for SEV-SNP guests
2024-04-03 15:29:03 +02:00
process_32.c
x86/resctl: fix scheduler confusion with 'current'
2023-03-08 11:48:11 -08:00
process_64.c
x86/cpu: Fix check for RDPKRU in __show_regs()
2024-05-02 16:32:42 +02:00
process.c
x86/shstk: Remove useless clone error handling
2023-09-19 09:18:34 -07:00
process.h
…
ptrace.c
x86: Add PTRACE interface for shadow stack
2023-08-02 15:01:51 -07:00
pvclock.c
locking/atomic: treewide: use raw_atomic*_<op>()
2023-06-05 09:57:20 +02:00
quirks.c
…
reboot_fixups_32.c
…
reboot.c
x86/reboot: Expose VMCS crash hooks if and only if KVM_{INTEL,AMD} is enabled
2023-08-03 15:37:14 -07:00
relocate_kernel_32.S
x86/kexec: Disable RET on kexec
2022-07-09 13:12:32 +02:00
relocate_kernel_64.S
x86,objtool: Split UNWIND_HINT_EMPTY in two
2023-03-23 23:18:58 +01:00
resource.c
x86/PCI: Tidy E820 removal messages
2022-12-10 10:33:11 -06:00
rethook.c
…
rtc.c
rtc: Extend timeout for waiting for UIP to clear to 1s
2024-01-31 16:18:56 -08:00
setup_percpu.c
x86/apic/32: Remove x86_cpu_to_logical_apicid
2023-08-09 11:58:23 -07:00
setup.c
x86/coco: Require seeding RNG with RDRAND on CoCo systems
2024-04-10 16:36:03 +02:00
sev_verify_cbit.S
…
sev-shared.c
x86/sev: Move early startup code into .head.text section
2024-04-10 16:36:07 +02:00
sev.c
x86/sev: Move early startup code into .head.text section
2024-04-10 16:36:07 +02:00
shstk.c
x86/shstk: Add warning for shadow stack double unmap
2023-09-19 09:18:34 -07:00
signal_32.c
x86/shstk: Add user control-protection fault handler
2023-08-02 15:01:50 -07:00
signal_64.c
x86/shstk: Delay signal entry SSP write until after user accesses
2023-11-28 17:19:55 +00:00
signal.c
x86/shstk: Handle signals for shadow stack
2023-08-02 15:01:50 -07:00
smp.c
Revert "x86/smp: Put CPUs into INIT on shutdown if possible"
2023-10-15 12:02:02 -07:00
smpboot.c
Revert "x86/smp: Put CPUs into INIT on shutdown if possible"
2023-10-15 12:02:02 -07:00
stacktrace.c
…
static_call.c
x86/static_call: Fix __static_call_fixup()
2023-08-17 13:24:09 +02:00
step.c
…
sys_ia32.c
…
sys_x86_64.c
x86/mm: Introduce MAP_ABOVE4G
2023-07-11 14:12:19 -07:00
tboot.c
mm: remove rb tree.
2022-09-26 19:46:16 -07:00
time.c
…
tls.c
x86/gsseg: Move load_gs_index() to its own new header file
2023-01-12 13:06:36 +01:00
tls.h
…
topology.c
cpu-hotplug: Provide prototypes for arch CPU registration
2023-10-11 14:27:37 +02:00
trace_clock.c
…
trace.c
…
tracepoint.c
…
traps.c
Add x86 shadow stack support
2023-08-31 12:20:12 -07:00
tsc_msr.c
…
tsc_sync.c
x86/tsc: Defer marking TSC unstable to a worker
2023-10-27 20:36:57 +02:00
tsc.c
x86/tsc: Extend watchdog check exemption to 4-Sockets platform
2023-07-14 15:17:09 -07:00
umip.c
…
unwind_frame.c
x86: kmsan: don't instrument stack walking functions
2022-10-03 14:03:25 -07:00
unwind_guess.c
…
unwind_orc.c
objtool changes for v6.5:
2023-06-27 15:05:41 -07:00
uprobes.c
uprobes/x86: Allow to probe a NOP instruction with 0x66 prefix
2022-12-05 11:55:18 +01:00
verify_cpu.S
…
vm86_32.c
…
vmlinux.lds.S
x86/srso: Disentangle rethunk-dependent options
2024-04-10 16:35:50 +02:00
vsmp_64.c
x86/apic: Get rid of hard_smp_processor_id()
2023-08-09 11:58:17 -07:00
x86_init.c
x86/sev: Skip ROM range scans and validation for SEV-SNP guests
2024-04-03 15:29:03 +02:00