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Masami Hiramatsu 609a2d6557 x86/kprobes: Fix to check non boostable prefixes correctly 
[ Upstream commit 6dd3b8c9f58816a1354be39559f630cd1bd12159 ]

There are 2 bugs in the can_boost() function because of using
x86 insn decoder. Since the insn->opcode never has a prefix byte,
it can not find CS override prefix in it. And the insn->attr is
the attribute of the opcode, thus inat_is_address_size_prefix(
insn->attr) always returns false.

Fix those by checking each prefix bytes with for_each_insn_prefix
loop and getting the correct attribute for each prefix byte.
Also, this removes unlikely, because this is a slow path.

Fixes: a8d11cd0714f ("kprobes/x86: Consolidate insn decoder users for copying code")
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/161666691162.1120877.2808435205294352583.stgit@devnote2
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-05-22 10:59:33 +02:00
..
acpi
ACPI: tables: x86: Reserve memory occupied by ACPI tables
2021-05-07 10:49:25 +02:00
apic
x86/apic/of: Fix CPU devicetree-node lookups
2021-03-24 11:07:39 +01:00
cpu
x86/microcode: Check for offline CPUs before requesting new microcode
2021-05-22 10:59:28 +02:00
fpu
x86/fpu: Allow multiple bits in clearcpuid= parameter
2020-10-29 09:55:00 +01:00
kprobes
x86/kprobes: Fix to check non boostable prefixes correctly
2021-05-22 10:59:33 +02:00
.gitignore
…
alternative.c
x86/modules: Avoid breaking W^X while loading modules
2019-05-31 06:46:12 -07:00
amd_gart_64.c
x86/dma/amd_gart: Use dma_direct_{alloc,free}()
2018-03-20 10:01:57 +01:00
amd_nb.c
x86/amd_nb: Add Family 19h PCI IDs
2020-06-22 09:05:25 +02:00
apb_timer.c
…
aperture_64.c
x86/gart: Exclude GART aperture from kcore
2019-04-20 09:15:59 +02:00
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/asm-offsets: Move TSS_sp0 and TSS_sp1 to asm-offsets.c
2018-07-20 01:11:35 +02:00
asm-offsets.c
x86/entry/32: Enter the kernel via trampoline stack
2018-07-20 01:11:37 +02:00
audit_64.c
…
bootflag.c
…
check.c
x86/corruption-check: Fix panic in memory_corruption_check() when boot option without value is provided
2018-11-13 11:08:19 -08:00
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
…
crash.c
x86/crash: Fix crash_setup_memmap_entries() out-of-bounds access
2021-04-28 13:16:53 +02:00
devicetree.c
Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-04-02 16:15:32 -07:00
doublefault.c
…
dumpstack_32.c
x86/dumpstack: Unify show_regs()
2018-03-08 12:04:59 +01:00
dumpstack_64.c
x86/dumpstack: Unify show_regs()
2018-03-08 12:04:59 +01:00
dumpstack.c
x86/process: Don't mix user/kernel regs in 64bit __show_regs()
2018-09-06 14:33:12 +02:00
e820.c
Revert "x86/e820: put !E820_TYPE_RAM regions into memblock.reserved"
2018-12-13 09:16:20 +01:00
early_printk.c
x86/earlyprintk: Add a force option for pciserial device
2018-11-27 16:13:00 +01:00
early-quirks.c
On GEM side:
2018-07-20 12:29:24 +10:00
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
x86/stackframe, x86/ftrace: Add pt_regs frame annotations
2020-02-14 16:33:28 -05:00
ftrace_64.S
x86/stackframe, x86/ftrace: Add pt_regs frame annotations
2020-02-14 16:33:28 -05:00
ftrace.c
ftrace/x86: Anotate text_mutex split between ftrace_arch_code_modify_post_process() and ftrace_arch_code_modify_prepare()
2020-04-02 15:28:15 +02:00
head32.c
…
head64.c
x86/boot/64: Make level2_kernel_pgt pages invalid outside kernel area
2019-10-29 09:20:04 +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/mm: Expand static page table for fixmap space
2018-09-20 23:17:22 +02:00
hpet.c
x86/hpet: Prevent potential NULL pointer dereference
2019-04-20 09:15:59 +02:00
hw_breakpoint.c
x86/hw_breakpoints: Make default case in hw_breakpoint_arch_parse() return an error
2019-04-20 09:15:59 +02:00
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/i8259: Use printk_deferred() to prevent deadlock
2020-08-05 10:06:06 +02:00
idt.c
x86/idt: Keep spurious entries unset in system_vectors
2020-06-25 15:33:05 +02:00
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: Don't include linux/irq.h from asm/hardirq.h
2018-08-05 09:53:13 +02:00
irq_64.c
x86/irq/64: Limit IST stack overflow check to #DB stack
2019-05-31 06:46:20 -07:00
irq_work.c
…
irq.c
x86/irq: Handle spurious interrupt after shutdown gracefully
2019-07-21 09:03:13 +02:00
irqflags.S
x86/paravirt: Make native_save_fl() extern inline
2018-07-03 10:56:27 +02:00
irqinit.c
x86: Don't include linux/irq.h from asm/hardirq.h
2018-08-05 09:53:13 +02:00
itmt.c
…
jailhouse.c
x86: Convert x86_platform_ops to timespec64
2018-05-19 14:03:14 +02:00
jump_label.c
jump_label: move 'asm goto' support test to Kconfig
2019-06-04 08:02:34 +02:00
kdebugfs.c
…
kexec-bzimage64.c
x86/kexec: Use up-to-dated screen_info copy to fill boot params
2020-11-10 12:35:59 +01:00
kgdb.c
x86/kgbd: Use NMI_VECTOR not APIC_DM_NMI
2020-01-27 14:51:02 +01:00
ksysfs.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
kvm.c
x86/paravirt: Fix callee-saved function ELF sizes
2019-08-06 19:06:52 +02:00
kvmclock.c
x86/kvmclock: set offset for kvm unstable clock
2019-09-16 08:22:07 +02:00
ldt.c
x86/ldt: Remove unused variable in map_ldt_struct()
2018-11-27 16:13:08 +01:00
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/mm: Stop pretending pgtable_l5_enabled is a variable
2018-05-19 11:56:57 +02:00
Makefile
jump_label: move 'asm goto' support test to Kconfig
2019-06-04 08:02:34 +02:00
mmconf-fam10h_64.c
…
module.c
x86/build: Treat R_386_PLT32 relocation as R_386_PC32
2021-03-07 12:18:58 +01:00
mpparse.c
x86/boot: Fix memory leak in default_get_smp_config()
2019-07-26 09:14:25 +02:00
msr.c
…
nmi_selftest.c
…
nmi.c
x86/nmi: Fix nmi_handle() duration miscalculation
2020-10-29 09:55:00 +01:00
paravirt_patch_32.c
…
paravirt_patch_64.c
x86/asm/64: Use 32-bit XOR to zero registers
2018-07-03 09:59:29 +02:00
paravirt-spinlocks.c
…
paravirt.c
x86/paravirt: Fix some warning messages
2018-09-19 13:22:04 +02:00
pci-calgary_64.c
x86/dma: Remove dma_alloc_coherent_gfp_flags()
2018-03-20 10:01:58 +01:00
pci-dma.c
IOMMU Update for Linux v4.19
2018-08-24 13:10:38 -07:00
pci-iommu_table.c
x86/iommu: Use NULL instead of 0
2018-08-02 14:33:19 +02:00
pci-swiotlb.c
x86/swiotlb: Enable swiotlb for > 4GiG RAM on 32-bit kernels
2018-10-19 07:49:32 +02:00
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: Store user space frame-pointer value on a sample
2018-05-25 08:11:12 +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
sched/x86: Save [ER]FLAGS on context switch
2019-05-22 07:37:36 +02:00
process_64.c
sched/x86: Save [ER]FLAGS on context switch
2019-05-22 07:37:36 +02:00
process.c
x86/speculation: Prevent rogue cross-process SSBD shutdown
2020-06-22 09:05:01 +02:00
process.h
x86/speculation: Change misspelled STIPB to STIBP
2020-06-22 09:05:04 +02:00
ptrace.c
x86/fsgsbase/64: Fix NULL deref in 86_fsgsbase_read_task
2020-08-19 08:15:03 +02:00
pvclock.c
x86: Convert x86_platform_ops to timespec64
2018-05-19 14:03:14 +02:00
quirks.c
x86/mce: Check for alternate indication of machine check recovery on Skylake
2018-06-07 22:22:12 +02:00
reboot_fixups_32.c
…
reboot.c
x86/reboot: Add Zotac ZBOX CI327 nano PCI reboot quirk
2021-03-07 12:18:57 +01:00
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/cpu_entry_area: Sync cpu_entry_area to initial_page_table
2018-03-01 09:48:27 +01:00
setup.c
ACPI: x86: Call acpi_boot_table_init() after acpi_table_upgrade()
2021-05-07 10:49:25 +02:00
signal_compat.c
signal: Add TRAP_UNK si_code for undiagnosted trap exceptions
2018-04-25 10:40:56 -05:00
signal.c
x86: Introduce TS_COMPAT_RESTART to fix get_nr_restart_syscall()
2021-03-24 11:07:38 +01:00
smp.c
x86/reboot: Always use NMI fallback when shutdown via reboot vector IPI fails
2019-10-05 13:09:36 +02:00
smpboot.c
x86: Fix early boot crash on gcc-10, third try
2020-05-20 08:18:49 +02:00
stacktrace.c
x86/stacktrace: Do not fail for ORC with regs on stack
2018-06-21 16:34:56 +02:00
step.c
…
sys_x86_64.c
compat: Move compat_timespec/ timeval to compat_time.h
2018-04-19 13:29:54 +02:00
sysfb_efi.c
x86/sysfb_efi: Add quirks for some devices with swapped width and height
2019-07-31 07:27:10 +02:00
sysfb_simplefb.c
x86/sysfb: Fix check for bad VRAM size
2020-02-24 08:34:38 +01:00
sysfb.c
…
tboot.c
…
tce_64.c
…
time.c
x86_64: Fix jiffies ODR violation
2020-06-22 09:05:01 +02:00
tls.c
x86/tls: Fix possible spectre-v1 in do_get_thread_area()
2019-07-14 08:11:17 +02:00
tls.h
…
topology.c
x86/xen: Disable CPU0 hotplug for Xen PV
2018-09-12 21:15:02 +02:00
trace_clock.c
…
tracepoint.c
…
traps.c
x86/speculation/mds: Revert CPU buffer clear on double fault exit
2019-05-22 07:37:34 +02:00
tsc_msr.c
x86/cpu: Sanitize FAM6_ATOM naming
2019-05-14 19:17:53 +02:00
tsc_sync.c
…
tsc.c
x86/cpu: Sanitize FAM6_ATOM naming
2019-05-14 19:17:53 +02:00
umip.c
signal: Ensure every siginfo we send has all bits initialized
2018-04-25 10:40:51 -05:00
unwind_frame.c
x86/unwind: Handle NULL pointer calls better in frame unwinder
2019-03-27 14:14:42 +09:00
unwind_guess.c
…
unwind_orc.c
x86/unwind/orc: Disable KASAN checking in the ORC unwinder, part 2
2021-03-17 16:43:51 +01:00
uprobes.c
x86/uprobes: Do not use prefixes.nbytes when looping over prefixes.bytes
2020-12-11 13:25:02 +01:00
verify_cpu.S
…
vm86_32.c
x86/entry: Rename update_sp0 to update_task_stack
2018-07-20 01:11:40 +02:00
vmlinux.lds.S
x86, vmlinux.lds: Page-align end of ..page_aligned sections
2020-07-29 10:16:58 +02:00
vsmp_64.c
…
x86_init.c
x86/tsc: Make use of tsc_calibrate_cpu_early()
2018-07-20 00:02:44 +02:00