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Li RongQing cd8c2d7c7c KVM: x86: fix sending PV IPI 
commit c15e0ae42c8e5a61e9aca8aac920517cf7b3e94e upstream.

If apic_id is less than min, and (max - apic_id) is greater than
KVM_IPI_CLUSTER_SIZE, then the third check condition is satisfied but
the new apic_id does not fit the bitmask.  In this case __send_ipi_mask
should send the IPI.

This is mostly theoretical, but it can happen if the apic_ids on three
iterations of the loop are for example 1, KVM_IPI_CLUSTER_SIZE, 0.

Fixes: aaffcfd1e82 ("KVM: X86: Implement PV IPIs in linux guest")
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Message-Id: <1646814944-51801-1-git-send-email-lirongqing@baidu.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-04-08 14:40:39 +02:00
..
acpi
ACPI / x86: Work around broken XSDT on Advantech DAC-BJ01 board
2022-03-28 09:57:10 +02:00
apic
x86/ioapic: Force affinity setup before startup
2021-08-18 08:59:15 +02:00
cpu
x86/speculation: Warn about eIBRS + LFENCE + Unprivileged eBPF + SMT
2022-03-11 12:11:50 +01:00
fpu
x86/fpu: Limit xstate copy size in xstateregs_set()
2021-07-20 16:05:52 +02:00
kprobes
x86/kprobes: Fix to check non boostable prefixes correctly
2021-05-14 09:50:24 +02:00
.gitignore
.gitignore: add SPDX License Identifier
2020-03-25 11:50:48 +01:00
alternative.c
A couple of x86 fixes which missed rc1 due to my stupidity:
2020-10-27 14:39:29 -07:00
amd_gart_64.c
dma-mapping: split <linux/dma-mapping.h>
2020-10-06 07:07:03 +02:00
amd_nb.c
x86/amd_nb: Add AMD family 17h model 60h PCI IDs
2020-05-22 18:24:40 +02:00
apb_timer.c
x86/apb_timer: Drop unused TSC calibration
2020-05-27 13:05:59 +02:00
aperture_64.c
…
apm_32.c
…
asm-offsets_32.c
x86 entry code updates:
2020-03-30 19:14:28 -07:00
asm-offsets_64.c
x86/pv: Switch SWAPGS to ALTERNATIVE
2021-12-08 09:03:27 +01:00
asm-offsets.c
x86: remove address space overrides using set_fs()
2020-09-08 22:21:36 -04:00
audit_64.c
x86/audit: Fix a -Wmissing-prototypes warning for ia32_classify_syscall()
2020-05-19 18:03:07 +02:00
bootflag.c
…
cc_platform.c
x86/sev: Add an x86 version of cc_platform_has()
2021-11-18 14:04:32 +01:00
check.c
…
cpuid.c
…
crash_core_32.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
crash_core_64.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
crash_dump_32.c
…
crash_dump_64.c
fs/core/vmcore: Move sev_active() reference to x86 arch code
2019-08-09 22:52:10 +10:00
crash.c
x86/crash: Fix crash_setup_memmap_entries() out-of-bounds access
2021-04-28 13:40:02 +02:00
devicetree.c
x86_ioapic_Consolidate_IOAPIC_allocation
2020-09-16 16:52:32 +02:00
doublefault_32.c
x86/entry: Convert double fault exception to IDTENTRY_DF
2020-06-11 15:15:03 +02:00
dumpstack_32.c
x86/32: Remove CONFIG_DOUBLEFAULT
2020-04-14 14:24:05 +02:00
dumpstack_64.c
x86/dumpstack/64: Add noinstr version of get_stack_info()
2020-09-09 11:33:19 +02:00
dumpstack.c
x86/dumpstack: Do not try to access user space code of other tasks
2020-11-18 12:56:29 +01:00
e820.c
x86/boot: Fix memremap of setup_indirect structures
2022-03-16 14:16:02 +01:00
early_printk.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
early-quirks.c
x86/gpu: Reserve stolen memory for first integrated Intel GPU
2022-01-27 10:53:41 +01:00
ebda.c
…
eisa.c
…
espfix_64.c
mm: introduce include/linux/pgtable.h
2020-06-09 09:39:13 -07:00
ftrace_32.S
x86: Change {JMP,CALL}_NOSPEC argument
2020-04-30 20:14:34 +02:00
ftrace_64.S
x86/ftrace: Do not jump to direct code in created trampolines
2020-06-29 11:42:48 -04:00
ftrace.c
x86/ftrace: Do not jump to direct code in created trampolines
2020-06-29 11:42:48 -04:00
head32.c
…
head64.c
treewide: Convert macro and uses of __section(foo) to __section("foo")
2020-10-25 14:51:49 -07:00
head_32.S
x86/xen: remove 32-bit Xen PV guest support
2020-08-11 08:26:48 +02:00
head_64.S
x86/head/64: Check SEV encryption before switching to kernel page-table
2020-10-29 18:09:59 +01:00
hpet.c
x86/hpet: Use another crystalball to evaluate HPET usability
2021-10-13 10:04:30 +02:00
hw_breakpoint.c
x86/debug: Prevent data breakpoints on cpu_dr7
2021-02-10 09:29:22 +01:00
i8237.c
…
i8253.c
…
i8259.c
x86/i8259: Use printk_deferred() to prevent deadlock
2020-07-29 16:27:16 +02:00
idt.c
This feature enhances the current guest memory encryption support
2020-10-14 10:21:34 -07:00
ima_arch.c
EFI updates for v5.7:
2020-02-26 15:21:22 +01:00
io_delay.c
…
ioport.c
x86/ioperm: Prevent a memory leak when fork fails
2020-05-28 21:36:20 +02:00
irq_32.c
x86/irq: Rework handle_irq() for 64-bit
2020-06-11 15:15:12 +02:00
irq_64.c
x86/irq: Make run_on_irqstack_cond() typesafe
2020-09-22 22:13:34 +02:00
irq_work.c
x86/entry: Convert various system vectors
2020-06-11 15:15:14 +02:00
irq.c
x86/irq: Ensure PI wakeup handler is unregistered before module unload
2021-11-18 14:03:41 +01:00
irqflags.S
x86/asm: Change all ENTRY+ENDPROC to SYM_FUNC_*
2019-10-18 11:58:33 +02:00
irqinit.c
x86/headers: Remove APIC headers from <asm/smp.h>
2020-08-06 16:13:09 +02:00
itmt.c
sysctl: pass kernel pointers to ->proc_handler
2020-04-27 02:07:40 -04:00
jailhouse.c
locking/seqlock, headers: Untangle the spaghetti monster
2020-08-06 16:13:13 +02:00
jump_label.c
x86/jump_label: Move 'inline' keyword placement
2020-03-27 11:05:41 +01:00
kdebugfs.c
x86/boot: Fix memremap of setup_indirect structures
2022-03-16 14:16:02 +01:00
kexec-bzimage64.c
x86/kexec: Use up-to-dated screen_info copy to fill boot params
2020-10-14 17:05:03 +02:00
kgdb.c
x86/debug: Change thread.debugreg6 to thread.virtual_dr6
2020-09-04 15:12:58 +02:00
ksysfs.c
x86/boot: Fix memremap of setup_indirect structures
2022-03-16 14:16:02 +01:00
kvm.c
KVM: x86: fix sending PV IPI
2022-04-08 14:40:39 +02:00
kvmclock.c
x86/kvmclock: Move this_cpu_pvti into kvmclock.h
2021-10-06 15:55:48 +02:00
ldt.c
x86/ldt: use "pr_info_once()" instead of open-coding it badly
2020-07-05 12:50:20 -07:00
machine_kexec_32.c
mm: don't include asm/pgtable.h if linux/mm.h is already included
2020-06-09 09:39:13 -07:00
machine_kexec_64.c
mm: don't include asm/pgtable.h if linux/mm.h is already included
2020-06-09 09:39:13 -07:00
Makefile
x86/sev: Add an x86 version of cc_platform_has()
2021-11-18 14:04:32 +01:00
mmconf-fam10h_64.c
…
module.c
x86/build: Treat R_386_PLT32 relocation as R_386_PC32
2021-03-07 12:34:04 +01:00
mpparse.c
Surgery of the MSI interrupt handling to prepare the support of upcoming
2020-10-12 11:40:41 -07:00
msr.c
x86/MSR: Filter MSR writes through X86_IOC_WRMSR_REGS ioctl too
2021-03-04 11:37:26 +01:00
nmi_selftest.c
…
nmi.c
KVM/VMX: Invoke NMI non-IST entry instead of IST entry
2021-05-19 10:12:51 +02:00
paravirt_patch.c
x86/pv: Switch SWAPGS to ALTERNATIVE
2021-12-08 09:03:27 +01:00
paravirt-spinlocks.c
…
paravirt.c
x86/pv: Switch SWAPGS to ALTERNATIVE
2021-12-08 09:03:27 +01:00
pci-dma.c
dma-mapping: move dma-debug.h to kernel/dma/
2020-10-06 07:07:05 +02:00
pci-iommu_table.c
…
pci-swiotlb.c
dma-mapping: fix filename references
2019-09-03 08:36:30 +02:00
pcspeaker.c
…
perf_regs.c
perf/arch: Remove perf_sample_data::regs_user_copy
2020-11-09 18:12:34 +01:00
platform-quirks.c
…
pmem.c
…
probe_roms.c
maccess: make get_kernel_nofault() check for minimal type compatibility
2020-06-18 12:10:37 -07:00
process_32.c
x86/fpu: Correct pkru/xstate inconsistency
2022-03-02 11:42:47 +01:00
process_64.c
x86/fpu: Correct pkru/xstate inconsistency
2022-03-02 11:42:47 +01:00
process.c
x86/iopl: Fake iopl(3) CLI/STI usage
2021-11-21 13:46:36 +01:00
process.h
x86: Use the correct SPDX License Identifier in headers
2019-10-01 20:31:35 +02:00
ptrace.c
x86/debug: Change thread.debugreg6 to thread.virtual_dr6
2020-09-04 15:12:58 +02:00
pvclock.c
x86/vdso: Use generic VDSO clock mode storage
2020-02-17 14:40:23 +01:00
quirks.c
x86, powerpc: Rename memcpy_mcsafe() to copy_mc_to_{user, kernel}()
2020-10-06 11:18:04 +02:00
reboot_fixups_32.c
…
reboot.c
x86/mm: Flush global TLB when switching to trampoline page-table
2022-01-27 10:54:14 +01:00
relocate_kernel_32.S
x86/asm: Annotate relocate_kernel_{32,64}.c
2019-10-18 09:53:19 +02:00
relocate_kernel_64.S
x86/kexec: Make relocate_kernel_64.S objtool clean
2020-03-25 18:28:28 +01:00
resource.c
…
rtc.c
…
setup_percpu.c
x86/mm: remove vmalloc faulting
2020-06-02 10:59:12 -07:00
setup.c
x86/boot: Fix memremap of setup_indirect structures
2022-03-16 14:16:02 +01:00
sev_verify_cbit.S
x86/boot/compressed/64: Check SEV encryption in 64-bit boot-path
2020-10-29 18:06:52 +01:00
sev-es-shared.c
x86/sev: Return an error on a returned non-zero SW_EXITINFO1[31:0]
2021-10-13 10:04:30 +02:00
sev-es.c
x86/sev: Fix SEV-ES INS/OUTS instructions for word, dword, and qword
2021-12-08 09:03:27 +01:00
signal_compat.c
arm64: mte: Add specific SIGSEGV codes
2020-09-04 12:46:06 +01:00
signal.c
x86/signal: Detect and prevent an alternate signal stack overflow
2021-07-20 16:05:50 +02:00
smp.c
x86/entry: Convert reschedule interrupt to IDTENTRY_SYSVEC_SIMPLE
2020-06-11 15:15:16 +02:00
smpboot.c
sched/core: Initialize the idle task with preemption disabled
2021-07-14 16:55:50 +02:00
stacktrace.c
stacktrace: Remove reliable argument from arch_stack_walk() callback
2020-09-18 14:24:16 +01:00
static_call.c
static_call: Allow early init
2020-09-01 09:58:06 +02:00
step.c
…
sys_ia32.c
x86: switch to kernel_clone()
2020-08-20 13:12:58 +02:00
sys_x86_64.c
x86: Remove unneeded includes
2020-03-21 16:03:25 +01:00
sysfb_efi.c
…
sysfb_simplefb.c
x86/sysfb: Fix check for bad VRAM size
2020-01-20 10:57:53 +01:00
sysfb.c
…
tboot.c
mm/gup: prevent gup_fast from racing with COW during fork
2020-12-30 11:53:54 +01:00
time.c
A set of fixes and updates for x86:
2020-06-11 15:54:31 -07:00
tls.c
x86: switch to ->regset_get()
2020-07-27 14:31:07 -04:00
tls.h
x86: switch to ->regset_get()
2020-07-27 14:31:07 -04:00
topology.c
x86/headers: Remove APIC headers from <asm/smp.h>
2020-08-06 16:13:09 +02:00
trace_clock.c
…
tracepoint.c
x86/entry: Convert reschedule interrupt to IDTENTRY_SYSVEC_SIMPLE
2020-06-11 15:15:16 +02:00
traps.c
x86/traps: Mark do_int3() NOKPROBE_SYMBOL
2022-03-16 14:16:03 +01:00
tsc_msr.c
Misc fixes and small updates all around the place:
2020-08-15 10:38:03 -07:00
tsc_sync.c
x86/tsc: Add a timer to make sure TSC_adjust is always checked
2021-12-08 09:03:28 +01:00
tsc.c
clocksource: Reduce clocksource-skew threshold
2022-01-27 10:54:05 +01:00
umip.c
x86/umip: Factor out instruction decoding
2020-09-07 19:45:24 +02:00
unwind_frame.c
fork-v5.9
2020-08-04 14:47:45 -07:00
unwind_guess.c
…
unwind_orc.c
x86/unwind/orc: Disable KASAN checking in the ORC unwinder, part 2
2021-03-17 17:06:35 +01:00
uprobes.c
x86/uprobes: Do not use prefixes.nbytes when looping over prefixes.bytes
2020-12-06 09:58:13 +01:00
verify_cpu.S
x86/asm: Annotate local pseudo-functions
2019-10-18 10:04:04 +02:00
vm86_32.c
mmap locking API: use coccinelle to convert mmap_sem rwsem call sites
2020-06-09 09:39:14 -07:00
vmlinux.lds.S
This tree introduces static_call(), which is the idea of static_branch()
2020-10-12 13:58:15 -07:00
vsmp_64.c
…
x86_init.c
x86/irq: Cleanup the arch_*_msi_irqs() leftovers
2020-09-16 16:52:38 +02:00