Extracting prog: 2m9.002030966s
Minimizing prog: 27m26.673937769s
Simplifying prog options: 0s
Extracting C: 1m17.316962116s
Simplifying C: 18m50.281119051s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x2)
r3 = syz_kvm_setup_syzos_vm$x86(r1, &(0x7f0000c00000/0x400000)=nil)
r4 = syz_kvm_add_vcpu$x86(r3, &(0x7f0000000080)={0x0, &(0x7f00000001c0)=[@wrmsr={0x65, 0x20, {0x40000000, 0x3}}, @wrmsr={0x65, 0x20, {0x40000001, 0x3f}}], 0x40})
ioctl$KVM_SET_CPUID2(r4, 0x4008ae90, &(0x7f0000000000)={0x1, 0x0, [{0x40000001, 0x4, 0x2, 0x31237648, 0x6, 0x2, 0x80}]})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_SET_REGS(r4, 0x4090ae82, &(0x7f0000000200)={[0x98f2, 0x7fffffffffffffff, 0x2, 0x1, 0x9, 0x4, 0x1ff, 0x8000000000000001, 0x4, 0x8000000000000000, 0x1, 0xffffffffffff986b, 0x3, 0x5, 0xc0000000000, 0x1], 0x0, 0x110900})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID(r2, 0x4068aea3, &(0x7f00000000c0)={0xc7, 0x0, 0x1})

program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 1m40s
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x2)
r3 = syz_kvm_setup_syzos_vm$x86(r1, &(0x7f0000c00000/0x400000)=nil)
r4 = syz_kvm_add_vcpu$x86(r3, &(0x7f0000000080)={0x0, &(0x7f00000001c0)=[@wrmsr={0x65, 0x20, {0x40000000, 0x3}}, @wrmsr={0x65, 0x20, {0x40000001, 0x3f}}], 0x40})
ioctl$KVM_SET_CPUID2(r4, 0x4008ae90, &(0x7f0000000000)={0x1, 0x0, [{0x40000001, 0x4, 0x2, 0x31237648, 0x6, 0x2, 0x80}]})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_SET_REGS(r4, 0x4090ae82, &(0x7f0000000200)={[0x98f2, 0x7fffffffffffffff, 0x2, 0x1, 0x9, 0x4, 0x1ff, 0x8000000000000001, 0x4, 0x8000000000000000, 0x1, 0xffffffffffff986b, 0x3, 0x5, 0xc0000000000, 0x1], 0x0, 0x110900})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID(r2, 0x4068aea3, &(0x7f00000000c0)={0xc7, 0x0, 0x1})

program crashed: KASAN: null-ptr-deref Write in hv_tlb_flush_enqueue
single: successfully extracted reproducer
found reproducer with 10 syscalls
minimizing guilty program
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x2)
r2 = syz_kvm_setup_syzos_vm$x86(r1, &(0x7f0000c00000/0x400000)=nil)
r3 = syz_kvm_add_vcpu$x86(r2, &(0x7f0000000080)={0x0, &(0x7f00000001c0)=[@wrmsr={0x65, 0x20, {0x40000000, 0x3}}, @wrmsr={0x65, 0x20, {0x40000001, 0x3f}}], 0x40})
ioctl$KVM_SET_CPUID2(r3, 0x4008ae90, &(0x7f0000000000)={0x1, 0x0, [{0x40000001, 0x4, 0x2, 0x31237648, 0x6, 0x2, 0x80}]})
ioctl$KVM_RUN(r3, 0xae80, 0x0)
ioctl$KVM_SET_REGS(r3, 0x4090ae82, &(0x7f0000000200)={[0x98f2, 0x7fffffffffffffff, 0x2, 0x1, 0x9, 0x4, 0x1ff, 0x8000000000000001, 0x4, 0x8000000000000000, 0x1, 0xffffffffffff986b, 0x3, 0x5, 0xc0000000000, 0x1], 0x0, 0x110900})
ioctl$KVM_RUN(r3, 0xae80, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x2)
r3 = syz_kvm_setup_syzos_vm$x86(r1, &(0x7f0000c00000/0x400000)=nil)
r4 = syz_kvm_add_vcpu$x86(r3, &(0x7f0000000080)={0x0, &(0x7f00000001c0)=[@wrmsr={0x65, 0x20, {0x40000000, 0x3}}, @wrmsr={0x65, 0x20, {0x40000001, 0x3f}}], 0x40})
ioctl$KVM_SET_CPUID2(r4, 0x4008ae90, &(0x7f0000000000)={0x1, 0x0, [{0x40000001, 0x4, 0x2, 0x31237648, 0x6, 0x2, 0x80}]})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_SET_REGS(r4, 0x4090ae82, &(0x7f0000000200)={[0x98f2, 0x7fffffffffffffff, 0x2, 0x1, 0x9, 0x4, 0x1ff, 0x8000000000000001, 0x4, 0x8000000000000000, 0x1, 0xffffffffffff986b, 0x3, 0x5, 0xc0000000000, 0x1], 0x0, 0x110900})
ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID(r2, 0x4068aea3, &(0x7f00000000c0)={0xc7, 0x0, 0x1})

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x2)
r3 = syz_kvm_setup_syzos_vm$x86(r1, &(0x7f0000c00000/0x400000)=nil)
r4 = syz_kvm_add_vcpu$x86(r3, &(0x7f0000000080)={0x0, &(0x7f00000001c0)=[@wrmsr={0x65, 0x20, {0x40000000, 0x3}}, @wrmsr={0x65, 0x20, {0x40000001, 0x3f}}], 0x40})
ioctl$KVM_SET_CPUID2(r4, 0x4008ae90, &(0x7f0000000000)={0x1, 0x0, [{0x40000001, 0x4, 0x2, 0x31237648, 0x6, 0x2, 0x80}]})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID(r2, 0x4068aea3, &(0x7f00000000c0)={0xc7, 0x0, 0x1})

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x2)
r3 = syz_kvm_setup_syzos_vm$x86(r1, &(0x7f0000c00000/0x400000)=nil)
r4 = syz_kvm_add_vcpu$x86(r3, &(0x7f0000000080)={0x0, &(0x7f00000001c0)=[@wrmsr={0x65, 0x20, {0x40000000, 0x3}}, @wrmsr={0x65, 0x20, {0x40000001, 0x3f}}], 0x40})
ioctl$KVM_SET_CPUID2(r4, 0x4008ae90, &(0x7f0000000000)={0x1, 0x0, [{0x40000001, 0x4, 0x2, 0x31237648, 0x6, 0x2, 0x80}]})
ioctl$KVM_SET_REGS(r4, 0x4090ae82, &(0x7f0000000200)={[0x98f2, 0x7fffffffffffffff, 0x2, 0x1, 0x9, 0x4, 0x1ff, 0x8000000000000001, 0x4, 0x8000000000000000, 0x1, 0xffffffffffff986b, 0x3, 0x5, 0xc0000000000, 0x1], 0x0, 0x110900})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID(r2, 0x4068aea3, &(0x7f00000000c0)={0xc7, 0x0, 0x1})

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x2)
r3 = syz_kvm_setup_syzos_vm$x86(r1, &(0x7f0000c00000/0x400000)=nil)
r4 = syz_kvm_add_vcpu$x86(r3, &(0x7f0000000080)={0x0, &(0x7f00000001c0)=[@wrmsr={0x65, 0x20, {0x40000000, 0x3}}, @wrmsr={0x65, 0x20, {0x40000001, 0x3f}}], 0x40})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_SET_REGS(r4, 0x4090ae82, &(0x7f0000000200)={[0x98f2, 0x7fffffffffffffff, 0x2, 0x1, 0x9, 0x4, 0x1ff, 0x8000000000000001, 0x4, 0x8000000000000000, 0x1, 0xffffffffffff986b, 0x3, 0x5, 0xc0000000000, 0x1], 0x0, 0x110900})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID(r2, 0x4068aea3, &(0x7f00000000c0)={0xc7, 0x0, 0x1})

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x2)
syz_kvm_setup_syzos_vm$x86(r1, &(0x7f0000c00000/0x400000)=nil)
ioctl$KVM_SET_CPUID2(0xffffffffffffffff, 0x4008ae90, &(0x7f0000000000)={0x1, 0x0, [{0x40000001, 0x4, 0x2, 0x31237648, 0x6, 0x2, 0x80}]})
ioctl$KVM_RUN(0xffffffffffffffff, 0xae80, 0x0)
ioctl$KVM_SET_REGS(0xffffffffffffffff, 0x4090ae82, &(0x7f0000000200)={[0x98f2, 0x7fffffffffffffff, 0x2, 0x1, 0x9, 0x4, 0x1ff, 0x8000000000000001, 0x4, 0x8000000000000000, 0x1, 0xffffffffffff986b, 0x3, 0x5, 0xc0000000000, 0x1], 0x0, 0x110900})
ioctl$KVM_RUN(0xffffffffffffffff, 0xae80, 0x0)
ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID(r2, 0x4068aea3, &(0x7f00000000c0)={0xc7, 0x0, 0x1})

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x2)
r3 = syz_kvm_add_vcpu$x86(0x0, &(0x7f0000000080)={0x0, &(0x7f00000001c0)=[@wrmsr={0x65, 0x20, {0x40000000, 0x3}}, @wrmsr={0x65, 0x20, {0x40000001, 0x3f}}], 0x40})
ioctl$KVM_SET_CPUID2(r3, 0x4008ae90, &(0x7f0000000000)={0x1, 0x0, [{0x40000001, 0x4, 0x2, 0x31237648, 0x6, 0x2, 0x80}]})
ioctl$KVM_RUN(r3, 0xae80, 0x0)
ioctl$KVM_SET_REGS(r3, 0x4090ae82, &(0x7f0000000200)={[0x98f2, 0x7fffffffffffffff, 0x2, 0x1, 0x9, 0x4, 0x1ff, 0x8000000000000001, 0x4, 0x8000000000000000, 0x1, 0xffffffffffff986b, 0x3, 0x5, 0xc0000000000, 0x1], 0x0, 0x110900})
ioctl$KVM_RUN(r3, 0xae80, 0x0)
ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID(r2, 0x4068aea3, &(0x7f00000000c0)={0xc7, 0x0, 0x1})

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = syz_kvm_setup_syzos_vm$x86(r1, &(0x7f0000c00000/0x400000)=nil)
r3 = syz_kvm_add_vcpu$x86(r2, &(0x7f0000000080)={0x0, &(0x7f00000001c0)=[@wrmsr={0x65, 0x20, {0x40000000, 0x3}}, @wrmsr={0x65, 0x20, {0x40000001, 0x3f}}], 0x40})
ioctl$KVM_SET_CPUID2(r3, 0x4008ae90, &(0x7f0000000000)={0x1, 0x0, [{0x40000001, 0x4, 0x2, 0x31237648, 0x6, 0x2, 0x80}]})
ioctl$KVM_RUN(r3, 0xae80, 0x0)
ioctl$KVM_SET_REGS(r3, 0x4090ae82, &(0x7f0000000200)={[0x98f2, 0x7fffffffffffffff, 0x2, 0x1, 0x9, 0x4, 0x1ff, 0x8000000000000001, 0x4, 0x8000000000000000, 0x1, 0xffffffffffff986b, 0x3, 0x5, 0xc0000000000, 0x1], 0x0, 0x110900})
ioctl$KVM_RUN(r3, 0xae80, 0x0)
ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID(0xffffffffffffffff, 0x4068aea3, &(0x7f00000000c0)={0xc7, 0x0, 0x1})

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
detailed listing:
executing program 0:
openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r0 = ioctl$KVM_CREATE_VCPU(0xffffffffffffffff, 0xae41, 0x2)
r1 = syz_kvm_setup_syzos_vm$x86(0xffffffffffffffff, &(0x7f0000c00000/0x400000)=nil)
r2 = syz_kvm_add_vcpu$x86(r1, &(0x7f0000000080)={0x0, &(0x7f00000001c0)=[@wrmsr={0x65, 0x20, {0x40000000, 0x3}}, @wrmsr={0x65, 0x20, {0x40000001, 0x3f}}], 0x40})
ioctl$KVM_SET_CPUID2(r2, 0x4008ae90, &(0x7f0000000000)={0x1, 0x0, [{0x40000001, 0x4, 0x2, 0x31237648, 0x6, 0x2, 0x80}]})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
ioctl$KVM_SET_REGS(r2, 0x4090ae82, &(0x7f0000000200)={[0x98f2, 0x7fffffffffffffff, 0x2, 0x1, 0x9, 0x4, 0x1ff, 0x8000000000000001, 0x4, 0x8000000000000000, 0x1, 0xffffffffffff986b, 0x3, 0x5, 0xc0000000000, 0x1], 0x0, 0x110900})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID(r0, 0x4068aea3, &(0x7f00000000c0)={0xc7, 0x0, 0x1})

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
detailed listing:
executing program 0:
r0 = ioctl$KVM_CREATE_VM(0xffffffffffffffff, 0xae01, 0x0)
r1 = ioctl$KVM_CREATE_VCPU(r0, 0xae41, 0x2)
r2 = syz_kvm_setup_syzos_vm$x86(r0, &(0x7f0000c00000/0x400000)=nil)
r3 = syz_kvm_add_vcpu$x86(r2, &(0x7f0000000080)={0x0, &(0x7f00000001c0)=[@wrmsr={0x65, 0x20, {0x40000000, 0x3}}, @wrmsr={0x65, 0x20, {0x40000001, 0x3f}}], 0x40})
ioctl$KVM_SET_CPUID2(r3, 0x4008ae90, &(0x7f0000000000)={0x1, 0x0, [{0x40000001, 0x4, 0x2, 0x31237648, 0x6, 0x2, 0x80}]})
ioctl$KVM_RUN(r3, 0xae80, 0x0)
ioctl$KVM_SET_REGS(r3, 0x4090ae82, &(0x7f0000000200)={[0x98f2, 0x7fffffffffffffff, 0x2, 0x1, 0x9, 0x4, 0x1ff, 0x8000000000000001, 0x4, 0x8000000000000000, 0x1, 0xffffffffffff986b, 0x3, 0x5, 0xc0000000000, 0x1], 0x0, 0x110900})
ioctl$KVM_RUN(r3, 0xae80, 0x0)
ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID(r1, 0x4068aea3, &(0x7f00000000c0)={0xc7, 0x0, 0x1})

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffffffffffff9c, 0x0, 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x2)
r3 = syz_kvm_setup_syzos_vm$x86(r1, &(0x7f0000c00000/0x400000)=nil)
r4 = syz_kvm_add_vcpu$x86(r3, &(0x7f0000000080)={0x0, &(0x7f00000001c0)=[@wrmsr={0x65, 0x20, {0x40000000, 0x3}}, @wrmsr={0x65, 0x20, {0x40000001, 0x3f}}], 0x40})
ioctl$KVM_SET_CPUID2(r4, 0x4008ae90, &(0x7f0000000000)={0x1, 0x0, [{0x40000001, 0x4, 0x2, 0x31237648, 0x6, 0x2, 0x80}]})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_SET_REGS(r4, 0x4090ae82, &(0x7f0000000200)={[0x98f2, 0x7fffffffffffffff, 0x2, 0x1, 0x9, 0x4, 0x1ff, 0x8000000000000001, 0x4, 0x8000000000000000, 0x1, 0xffffffffffff986b, 0x3, 0x5, 0xc0000000000, 0x1], 0x0, 0x110900})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID(r2, 0x4068aea3, &(0x7f00000000c0)={0xc7, 0x0, 0x1})

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x2)
r3 = syz_kvm_setup_syzos_vm$x86(r1, &(0x7f0000c00000/0x400000)=nil)
r4 = syz_kvm_add_vcpu$x86(r3, 0x0)
ioctl$KVM_SET_CPUID2(r4, 0x4008ae90, &(0x7f0000000000)={0x1, 0x0, [{0x40000001, 0x4, 0x2, 0x31237648, 0x6, 0x2, 0x80}]})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_SET_REGS(r4, 0x4090ae82, &(0x7f0000000200)={[0x98f2, 0x7fffffffffffffff, 0x2, 0x1, 0x9, 0x4, 0x1ff, 0x8000000000000001, 0x4, 0x8000000000000000, 0x1, 0xffffffffffff986b, 0x3, 0x5, 0xc0000000000, 0x1], 0x0, 0x110900})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID(r2, 0x4068aea3, &(0x7f00000000c0)={0xc7, 0x0, 0x1})

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x2)
r3 = syz_kvm_setup_syzos_vm$x86(r1, &(0x7f0000c00000/0x400000)=nil)
r4 = syz_kvm_add_vcpu$x86(r3, &(0x7f0000000080)={0x0, 0x0})
ioctl$KVM_SET_CPUID2(r4, 0x4008ae90, &(0x7f0000000000)={0x1, 0x0, [{0x40000001, 0x4, 0x2, 0x31237648, 0x6, 0x2, 0x80}]})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_SET_REGS(r4, 0x4090ae82, &(0x7f0000000200)={[0x98f2, 0x7fffffffffffffff, 0x2, 0x1, 0x9, 0x4, 0x1ff, 0x8000000000000001, 0x4, 0x8000000000000000, 0x1, 0xffffffffffff986b, 0x3, 0x5, 0xc0000000000, 0x1], 0x0, 0x110900})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID(r2, 0x4068aea3, &(0x7f00000000c0)={0xc7, 0x0, 0x1})

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x2)
r3 = syz_kvm_setup_syzos_vm$x86(r1, &(0x7f0000c00000/0x400000)=nil)
r4 = syz_kvm_add_vcpu$x86(r3, &(0x7f0000000080)={0x0, &(0x7f00000001c0)=[@wrmsr={0x65, 0x20, {0x40000000, 0x3}}, @wrmsr={0x65, 0x20, {0x40000001, 0x3f}}], 0x40})
ioctl$KVM_SET_CPUID2(r4, 0x4008ae90, 0x0)
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_SET_REGS(r4, 0x4090ae82, &(0x7f0000000200)={[0x98f2, 0x7fffffffffffffff, 0x2, 0x1, 0x9, 0x4, 0x1ff, 0x8000000000000001, 0x4, 0x8000000000000000, 0x1, 0xffffffffffff986b, 0x3, 0x5, 0xc0000000000, 0x1], 0x0, 0x110900})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID(r2, 0x4068aea3, &(0x7f00000000c0)={0xc7, 0x0, 0x1})

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x2)
r3 = syz_kvm_setup_syzos_vm$x86(r1, &(0x7f0000c00000/0x400000)=nil)
r4 = syz_kvm_add_vcpu$x86(r3, &(0x7f0000000080)={0x0, &(0x7f00000001c0)=[@wrmsr={0x65, 0x20, {0x40000000, 0x3}}, @wrmsr={0x65, 0x20, {0x40000001, 0x3f}}], 0x40})
ioctl$KVM_SET_CPUID2(r4, 0x4008ae90, &(0x7f0000000000)={0x1, 0x0, [{0x40000001, 0x4, 0x2, 0x31237648, 0x6, 0x2, 0x80}]})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_SET_REGS(r4, 0x4090ae82, 0x0)
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID(r2, 0x4068aea3, &(0x7f00000000c0)={0xc7, 0x0, 0x1})

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x2)
r3 = syz_kvm_setup_syzos_vm$x86(r1, &(0x7f0000c00000/0x400000)=nil)
r4 = syz_kvm_add_vcpu$x86(r3, &(0x7f0000000080)={0x0, &(0x7f00000001c0)=[@wrmsr={0x65, 0x20, {0x40000000, 0x3}}, @wrmsr={0x65, 0x20, {0x40000001, 0x3f}}], 0x40})
ioctl$KVM_SET_CPUID2(r4, 0x4008ae90, &(0x7f0000000000)={0x1, 0x0, [{0x40000001, 0x4, 0x2, 0x31237648, 0x6, 0x2, 0x80}]})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_SET_REGS(r4, 0x4090ae82, &(0x7f0000000200)={[0x98f2, 0x7fffffffffffffff, 0x2, 0x1, 0x9, 0x4, 0x1ff, 0x8000000000000001, 0x4, 0x8000000000000000, 0x1, 0xffffffffffff986b, 0x3, 0x5, 0xc0000000000, 0x1], 0x0, 0x110900})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID(r2, 0x4068aea3, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
program crashed: KASAN: null-ptr-deref Write in hv_tlb_flush_enqueue
simplifying C reproducer
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
program did not crash
testing compiled C program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
program did not crash
testing compiled C program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
program did not crash
testing compiled C program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
program did not crash
testing compiled C program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
program did not crash
testing compiled C program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
program did not crash
testing compiled C program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
program did not crash
testing compiled C program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
program did not crash
testing compiled C program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
program did not crash
testing compiled C program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
program did not crash
testing compiled C program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
program crashed: WARNING in hv_tlb_flush_enqueue
a never seen crash title: WARNING in hv_tlb_flush_enqueue, ignore
testing compiled C program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
program crashed: WARNING in hv_tlb_flush_enqueue
a never seen crash title: WARNING in hv_tlb_flush_enqueue, ignore
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x2)
r3 = syz_kvm_setup_syzos_vm$x86(r1, &(0x7f0000c00000/0x400000)=nil)
r4 = syz_kvm_add_vcpu$x86(r3, &(0x7f0000000080)={0x0, &(0x7f00000001c0)=[@wrmsr={0x65, 0x20, {0x40000000, 0x3}}, @wrmsr={0x65, 0x20, {0x40000001, 0x3f}}], 0x40})
ioctl$KVM_SET_CPUID2(r4, 0x4008ae90, &(0x7f0000000000)={0x1, 0x0, [{0x40000001, 0x4, 0x2, 0x31237648, 0x6, 0x2, 0x80}]})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_SET_REGS(r4, 0x4090ae82, &(0x7f0000000200)={[0x98f2, 0x7fffffffffffffff, 0x2, 0x1, 0x9, 0x4, 0x1ff, 0x8000000000000001, 0x4, 0x8000000000000000, 0x1, 0xffffffffffff986b, 0x3, 0x5, 0xc0000000000, 0x1], 0x0, 0x110900})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID(r2, 0x4068aea3, &(0x7f00000000c0)={0xc7, 0x0, 0x1})

program crashed: WARNING in hv_tlb_flush_enqueue
validation run: crashed=true
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x2)
r3 = syz_kvm_setup_syzos_vm$x86(r1, &(0x7f0000c00000/0x400000)=nil)
r4 = syz_kvm_add_vcpu$x86(r3, &(0x7f0000000080)={0x0, &(0x7f00000001c0)=[@wrmsr={0x65, 0x20, {0x40000000, 0x3}}, @wrmsr={0x65, 0x20, {0x40000001, 0x3f}}], 0x40})
ioctl$KVM_SET_CPUID2(r4, 0x4008ae90, &(0x7f0000000000)={0x1, 0x0, [{0x40000001, 0x4, 0x2, 0x31237648, 0x6, 0x2, 0x80}]})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_SET_REGS(r4, 0x4090ae82, &(0x7f0000000200)={[0x98f2, 0x7fffffffffffffff, 0x2, 0x1, 0x9, 0x4, 0x1ff, 0x8000000000000001, 0x4, 0x8000000000000000, 0x1, 0xffffffffffff986b, 0x3, 0x5, 0xc0000000000, 0x1], 0x0, 0x110900})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID(r2, 0x4068aea3, &(0x7f00000000c0)={0xc7, 0x0, 0x1})

program did not crash
validation run: crashed=false
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x2)
r3 = syz_kvm_setup_syzos_vm$x86(r1, &(0x7f0000c00000/0x400000)=nil)
r4 = syz_kvm_add_vcpu$x86(r3, &(0x7f0000000080)={0x0, &(0x7f00000001c0)=[@wrmsr={0x65, 0x20, {0x40000000, 0x3}}, @wrmsr={0x65, 0x20, {0x40000001, 0x3f}}], 0x40})
ioctl$KVM_SET_CPUID2(r4, 0x4008ae90, &(0x7f0000000000)={0x1, 0x0, [{0x40000001, 0x4, 0x2, 0x31237648, 0x6, 0x2, 0x80}]})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_SET_REGS(r4, 0x4090ae82, &(0x7f0000000200)={[0x98f2, 0x7fffffffffffffff, 0x2, 0x1, 0x9, 0x4, 0x1ff, 0x8000000000000001, 0x4, 0x8000000000000000, 0x1, 0xffffffffffff986b, 0x3, 0x5, 0xc0000000000, 0x1], 0x0, 0x110900})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID(r2, 0x4068aea3, &(0x7f00000000c0)={0xc7, 0x0, 0x1})

program crashed: KASAN: null-ptr-deref Write in kfifo_copy_in
validation run: crashed=true
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-syz_kvm_setup_syzos_vm$x86-syz_kvm_add_vcpu$x86-ioctl$KVM_SET_CPUID2-ioctl$KVM_RUN-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x2)
r3 = syz_kvm_setup_syzos_vm$x86(r1, &(0x7f0000c00000/0x400000)=nil)
r4 = syz_kvm_add_vcpu$x86(r3, &(0x7f0000000080)={0x0, &(0x7f00000001c0)=[@wrmsr={0x65, 0x20, {0x40000000, 0x3}}, @wrmsr={0x65, 0x20, {0x40000001, 0x3f}}], 0x40})
ioctl$KVM_SET_CPUID2(r4, 0x4008ae90, &(0x7f0000000000)={0x1, 0x0, [{0x40000001, 0x4, 0x2, 0x31237648, 0x6, 0x2, 0x80}]})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_SET_REGS(r4, 0x4090ae82, &(0x7f0000000200)={[0x98f2, 0x7fffffffffffffff, 0x2, 0x1, 0x9, 0x4, 0x1ff, 0x8000000000000001, 0x4, 0x8000000000000000, 0x1, 0xffffffffffff986b, 0x3, 0x5, 0xc0000000000, 0x1], 0x0, 0x110900})
ioctl$KVM_RUN(r4, 0xae80, 0x0)
ioctl$KVM_CAP_HYPERV_ENFORCE_CPUID(r2, 0x4068aea3, &(0x7f00000000c0)={0xc7, 0x0, 0x1})

program crashed: KASAN: null-ptr-deref Write in hv_tlb_flush_enqueue
validation run: crashed=true
reproducing took 54m39.811556581s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
BUG: KASAN: null-ptr-deref in atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1300 [inline]
BUG: KASAN: null-ptr-deref in queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
BUG: KASAN: null-ptr-deref in do_raw_spin_lock include/linux/spinlock.h:187 [inline]
BUG: KASAN: null-ptr-deref in __raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline]
BUG: KASAN: null-ptr-deref in _raw_spin_lock+0x85/0x120 kernel/locking/spinlock.c:154
Write of size 4 at addr 0000000000000750 by task syz.2.236/1093

CPU: 1 UID: 0 PID: 1093 Comm: syz.2.236 Not tainted syzkaller #0 de3e1d1c5728fabb050931035751e453f935abb5
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x140/0x1c0 lib/dump_stack.c:120
 print_report+0x3d/0x70 mm/kasan/report.c:484
 kasan_report+0x162/0x1a0 mm/kasan/report.c:594
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x25a/0x2b0 mm/kasan/generic.c:189
 __kasan_check_write+0x18/0x20 mm/kasan/shadow.c:37
 instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
 atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1300 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
 do_raw_spin_lock include/linux/spinlock.h:187 [inline]
 __raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline]
 _raw_spin_lock+0x85/0x120 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 hv_tlb_flush_enqueue+0xb4/0x290 arch/x86/kvm/hyperv.c:1942
 kvm_hv_flush_tlb+0xa0c/0x1f10 arch/x86/kvm/hyperv.c:2141
 kvm_hv_hypercall+0xfc8/0x1ca0 arch/x86/kvm/hyperv.c:-1
 kvm_emulate_hypercall+0xe6/0x450 arch/x86/kvm/x86.c:10147
 __vmx_handle_exit arch/x86/kvm/vmx/vmx.c:6597 [inline]
 vmx_handle_exit+0x12c0/0x1b10 arch/x86/kvm/vmx/vmx.c:6614
 vcpu_enter_guest arch/x86/kvm/x86.c:11169 [inline]
 vcpu_run+0x49f7/0x7840 arch/x86/kvm/x86.c:11330
 kvm_arch_vcpu_ioctl_run+0x1167/0x1bd0 arch/x86/kvm/x86.c:11654
 kvm_vcpu_ioctl+0xa48/0x1000 virt/kvm/kvm_main.c:4515
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0x135/0x1b0 fs/ioctl.c:893
 __x64_sys_ioctl+0x7f/0xa0 fs/ioctl.c:893
 x64_sys_call+0x1878/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7febaf99c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007febb08e4028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007febafc15fa0 RCX: 00007febaf99c819
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006
RBP: 00007febafa32c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007febafc16038 R14: 00007febafc15fa0 R15: 00007ffc65775078
 </TASK>
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000750
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 800000011dde4067 P4D 800000011dde4067 PUD 0 
Oops: Oops: 0002 [#1] PREEMPT SMP KASAN PTI
CPU: 1 UID: 0 PID: 1093 Comm: syz.2.236 Tainted: G    B              syzkaller #0 de3e1d1c5728fabb050931035751e453f935abb5
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:arch_atomic_try_cmpxchg arch/x86/include/asm/atomic.h:107 [inline]
RIP: 0010:raw_atomic_try_cmpxchg_acquire include/linux/atomic/atomic-arch-fallback.h:2170 [inline]
RIP: 0010:atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1302 [inline]
RIP: 0010:queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
RIP: 0010:do_raw_spin_lock include/linux/spinlock.h:187 [inline]
RIP: 0010:__raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline]
RIP: 0010:_raw_spin_lock+0x9b/0x120 kernel/locking/spinlock.c:154
Code: 04 04 c7 44 24 20 00 00 00 00 be 04 00 00 00 e8 8b 7f 3c fc 4c 89 f7 be 04 00 00 00 e8 7e 7f 3c fc 8b 44 24 20 b9 01 00 00 00 <f0> 0f b1 0b 75 38 43 c6 44 3c 04 f8 48 c7 04 24 0e 36 e0 45 4b c7
RSP: 0018:ffffc9000337ec00 EFLAGS: 00010297
RAX: 0000000000000000 RBX: 0000000000000750 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc9000337ec20
RBP: ffffc9000337ec90 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200066fd84 R12: 1ffff9200066fd80
R13: dffffc0000000000 R14: ffffc9000337ec20 R15: dffffc0000000000
FS:  00007febb08e46c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000750 CR3: 000000010cfa4000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 spin_lock include/linux/spinlock.h:351 [inline]
 hv_tlb_flush_enqueue+0xb4/0x290 arch/x86/kvm/hyperv.c:1942
 kvm_hv_flush_tlb+0xa0c/0x1f10 arch/x86/kvm/hyperv.c:2141
 kvm_hv_hypercall+0xfc8/0x1ca0 arch/x86/kvm/hyperv.c:-1
 kvm_emulate_hypercall+0xe6/0x450 arch/x86/kvm/x86.c:10147
 __vmx_handle_exit arch/x86/kvm/vmx/vmx.c:6597 [inline]
 vmx_handle_exit+0x12c0/0x1b10 arch/x86/kvm/vmx/vmx.c:6614
 vcpu_enter_guest arch/x86/kvm/x86.c:11169 [inline]
 vcpu_run+0x49f7/0x7840 arch/x86/kvm/x86.c:11330
 kvm_arch_vcpu_ioctl_run+0x1167/0x1bd0 arch/x86/kvm/x86.c:11654
 kvm_vcpu_ioctl+0xa48/0x1000 virt/kvm/kvm_main.c:4515
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0x135/0x1b0 fs/ioctl.c:893
 __x64_sys_ioctl+0x7f/0xa0 fs/ioctl.c:893
 x64_sys_call+0x1878/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7febaf99c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007febb08e4028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007febafc15fa0 RCX: 00007febaf99c819
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006
RBP: 00007febafa32c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007febafc16038 R14: 00007febafc15fa0 R15: 00007ffc65775078
 </TASK>
Modules linked in:
CR2: 0000000000000750
---[ end trace 0000000000000000 ]---
RIP: 0010:arch_atomic_try_cmpxchg arch/x86/include/asm/atomic.h:107 [inline]
RIP: 0010:raw_atomic_try_cmpxchg_acquire include/linux/atomic/atomic-arch-fallback.h:2170 [inline]
RIP: 0010:atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1302 [inline]
RIP: 0010:queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
RIP: 0010:do_raw_spin_lock include/linux/spinlock.h:187 [inline]
RIP: 0010:__raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline]
RIP: 0010:_raw_spin_lock+0x9b/0x120 kernel/locking/spinlock.c:154
Code: 04 04 c7 44 24 20 00 00 00 00 be 04 00 00 00 e8 8b 7f 3c fc 4c 89 f7 be 04 00 00 00 e8 7e 7f 3c fc 8b 44 24 20 b9 01 00 00 00 <f0> 0f b1 0b 75 38 43 c6 44 3c 04 f8 48 c7 04 24 0e 36 e0 45 4b c7
RSP: 0018:ffffc9000337ec00 EFLAGS: 00010297
RAX: 0000000000000000 RBX: 0000000000000750 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc9000337ec20
RBP: ffffc9000337ec90 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200066fd84 R12: 1ffff9200066fd80
R13: dffffc0000000000 R14: ffffc9000337ec20 R15: dffffc0000000000
FS:  00007febb08e46c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000750 CR3: 000000010cfa4000 CR4: 00000000003526b0
----------------
Code disassembly (best guess):
   0:	04 04                	add    $0x4,%al
   2:	c7 44 24 20 00 00 00 	movl   $0x0,0x20(%rsp)
   9:	00
   a:	be 04 00 00 00       	mov    $0x4,%esi
   f:	e8 8b 7f 3c fc       	call   0xfc3c7f9f
  14:	4c 89 f7             	mov    %r14,%rdi
  17:	be 04 00 00 00       	mov    $0x4,%esi
  1c:	e8 7e 7f 3c fc       	call   0xfc3c7f9f
  21:	8b 44 24 20          	mov    0x20(%rsp),%eax
  25:	b9 01 00 00 00       	mov    $0x1,%ecx
* 2a:	f0 0f b1 0b          	lock cmpxchg %ecx,(%rbx) <-- trapping instruction
  2e:	75 38                	jne    0x68
  30:	43 c6 44 3c 04 f8    	movb   $0xf8,0x4(%r12,%r15,1)
  36:	48 c7 04 24 0e 36 e0 	movq   $0x45e0360e,(%rsp)
  3d:	45
  3e:	4b                   	rex.WXB
  3f:	c7                   	.byte 0xc7

final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
BUG: KASAN: null-ptr-deref in atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1300 [inline]
BUG: KASAN: null-ptr-deref in queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
BUG: KASAN: null-ptr-deref in do_raw_spin_lock include/linux/spinlock.h:187 [inline]
BUG: KASAN: null-ptr-deref in __raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline]
BUG: KASAN: null-ptr-deref in _raw_spin_lock+0x85/0x120 kernel/locking/spinlock.c:154
Write of size 4 at addr 0000000000000750 by task syz.2.236/1093

CPU: 1 UID: 0 PID: 1093 Comm: syz.2.236 Not tainted syzkaller #0 de3e1d1c5728fabb050931035751e453f935abb5
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x140/0x1c0 lib/dump_stack.c:120
 print_report+0x3d/0x70 mm/kasan/report.c:484
 kasan_report+0x162/0x1a0 mm/kasan/report.c:594
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x25a/0x2b0 mm/kasan/generic.c:189
 __kasan_check_write+0x18/0x20 mm/kasan/shadow.c:37
 instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
 atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1300 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
 do_raw_spin_lock include/linux/spinlock.h:187 [inline]
 __raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline]
 _raw_spin_lock+0x85/0x120 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 hv_tlb_flush_enqueue+0xb4/0x290 arch/x86/kvm/hyperv.c:1942
 kvm_hv_flush_tlb+0xa0c/0x1f10 arch/x86/kvm/hyperv.c:2141
 kvm_hv_hypercall+0xfc8/0x1ca0 arch/x86/kvm/hyperv.c:-1
 kvm_emulate_hypercall+0xe6/0x450 arch/x86/kvm/x86.c:10147
 __vmx_handle_exit arch/x86/kvm/vmx/vmx.c:6597 [inline]
 vmx_handle_exit+0x12c0/0x1b10 arch/x86/kvm/vmx/vmx.c:6614
 vcpu_enter_guest arch/x86/kvm/x86.c:11169 [inline]
 vcpu_run+0x49f7/0x7840 arch/x86/kvm/x86.c:11330
 kvm_arch_vcpu_ioctl_run+0x1167/0x1bd0 arch/x86/kvm/x86.c:11654
 kvm_vcpu_ioctl+0xa48/0x1000 virt/kvm/kvm_main.c:4515
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0x135/0x1b0 fs/ioctl.c:893
 __x64_sys_ioctl+0x7f/0xa0 fs/ioctl.c:893
 x64_sys_call+0x1878/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7febaf99c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007febb08e4028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007febafc15fa0 RCX: 00007febaf99c819
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006
RBP: 00007febafa32c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007febafc16038 R14: 00007febafc15fa0 R15: 00007ffc65775078
 </TASK>
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000750
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 800000011dde4067 P4D 800000011dde4067 PUD 0 
Oops: Oops: 0002 [#1] PREEMPT SMP KASAN PTI
CPU: 1 UID: 0 PID: 1093 Comm: syz.2.236 Tainted: G    B              syzkaller #0 de3e1d1c5728fabb050931035751e453f935abb5
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:arch_atomic_try_cmpxchg arch/x86/include/asm/atomic.h:107 [inline]
RIP: 0010:raw_atomic_try_cmpxchg_acquire include/linux/atomic/atomic-arch-fallback.h:2170 [inline]
RIP: 0010:atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1302 [inline]
RIP: 0010:queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
RIP: 0010:do_raw_spin_lock include/linux/spinlock.h:187 [inline]
RIP: 0010:__raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline]
RIP: 0010:_raw_spin_lock+0x9b/0x120 kernel/locking/spinlock.c:154
Code: 04 04 c7 44 24 20 00 00 00 00 be 04 00 00 00 e8 8b 7f 3c fc 4c 89 f7 be 04 00 00 00 e8 7e 7f 3c fc 8b 44 24 20 b9 01 00 00 00 <f0> 0f b1 0b 75 38 43 c6 44 3c 04 f8 48 c7 04 24 0e 36 e0 45 4b c7
RSP: 0018:ffffc9000337ec00 EFLAGS: 00010297
RAX: 0000000000000000 RBX: 0000000000000750 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc9000337ec20
RBP: ffffc9000337ec90 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200066fd84 R12: 1ffff9200066fd80
R13: dffffc0000000000 R14: ffffc9000337ec20 R15: dffffc0000000000
FS:  00007febb08e46c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000750 CR3: 000000010cfa4000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 spin_lock include/linux/spinlock.h:351 [inline]
 hv_tlb_flush_enqueue+0xb4/0x290 arch/x86/kvm/hyperv.c:1942
 kvm_hv_flush_tlb+0xa0c/0x1f10 arch/x86/kvm/hyperv.c:2141
 kvm_hv_hypercall+0xfc8/0x1ca0 arch/x86/kvm/hyperv.c:-1
 kvm_emulate_hypercall+0xe6/0x450 arch/x86/kvm/x86.c:10147
 __vmx_handle_exit arch/x86/kvm/vmx/vmx.c:6597 [inline]
 vmx_handle_exit+0x12c0/0x1b10 arch/x86/kvm/vmx/vmx.c:6614
 vcpu_enter_guest arch/x86/kvm/x86.c:11169 [inline]
 vcpu_run+0x49f7/0x7840 arch/x86/kvm/x86.c:11330
 kvm_arch_vcpu_ioctl_run+0x1167/0x1bd0 arch/x86/kvm/x86.c:11654
 kvm_vcpu_ioctl+0xa48/0x1000 virt/kvm/kvm_main.c:4515
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0x135/0x1b0 fs/ioctl.c:893
 __x64_sys_ioctl+0x7f/0xa0 fs/ioctl.c:893
 x64_sys_call+0x1878/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7febaf99c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007febb08e4028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007febafc15fa0 RCX: 00007febaf99c819
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006
RBP: 00007febafa32c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007febafc16038 R14: 00007febafc15fa0 R15: 00007ffc65775078
 </TASK>
Modules linked in:
CR2: 0000000000000750
---[ end trace 0000000000000000 ]---
RIP: 0010:arch_atomic_try_cmpxchg arch/x86/include/asm/atomic.h:107 [inline]
RIP: 0010:raw_atomic_try_cmpxchg_acquire include/linux/atomic/atomic-arch-fallback.h:2170 [inline]
RIP: 0010:atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1302 [inline]
RIP: 0010:queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
RIP: 0010:do_raw_spin_lock include/linux/spinlock.h:187 [inline]
RIP: 0010:__raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline]
RIP: 0010:_raw_spin_lock+0x9b/0x120 kernel/locking/spinlock.c:154
Code: 04 04 c7 44 24 20 00 00 00 00 be 04 00 00 00 e8 8b 7f 3c fc 4c 89 f7 be 04 00 00 00 e8 7e 7f 3c fc 8b 44 24 20 b9 01 00 00 00 <f0> 0f b1 0b 75 38 43 c6 44 3c 04 f8 48 c7 04 24 0e 36 e0 45 4b c7
RSP: 0018:ffffc9000337ec00 EFLAGS: 00010297
RAX: 0000000000000000 RBX: 0000000000000750 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc9000337ec20
RBP: ffffc9000337ec90 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200066fd84 R12: 1ffff9200066fd80
R13: dffffc0000000000 R14: ffffc9000337ec20 R15: dffffc0000000000
FS:  00007febb08e46c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000750 CR3: 000000010cfa4000 CR4: 00000000003526b0
----------------
Code disassembly (best guess):
   0:	04 04                	add    $0x4,%al
   2:	c7 44 24 20 00 00 00 	movl   $0x0,0x20(%rsp)
   9:	00
   a:	be 04 00 00 00       	mov    $0x4,%esi
   f:	e8 8b 7f 3c fc       	call   0xfc3c7f9f
  14:	4c 89 f7             	mov    %r14,%rdi
  17:	be 04 00 00 00       	mov    $0x4,%esi
  1c:	e8 7e 7f 3c fc       	call   0xfc3c7f9f
  21:	8b 44 24 20          	mov    0x20(%rsp),%eax
  25:	b9 01 00 00 00       	mov    $0x1,%ecx
* 2a:	f0 0f b1 0b          	lock cmpxchg %ecx,(%rbx) <-- trapping instruction
  2e:	75 38                	jne    0x68
  30:	43 c6 44 3c 04 f8    	movb   $0xf8,0x4(%r12,%r15,1)
  36:	48 c7 04 24 0e 36 e0 	movq   $0x45e0360e,(%rsp)
  3d:	45
  3e:	4b                   	rex.WXB
  3f:	c7                   	.byte 0xc7