WARNING: CPU: 1 PID: 3508 at arch/x86/kvm/x86.c:7375 kvm_arch_vcpu_ioctl_run+0x14d/0x59e0 arch/x86/kvm/x86.c:7375 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 3508 Comm: syzkaller176291 Not tainted 4.15.0-rc6-next-20180103+ #87 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x137/0x198 lib/dump_stack.c:53 panic+0x1e4/0x41c kernel/panic.c:183 __warn+0x1dc/0x200 kernel/panic.c:547 report_bug+0x211/0x2d0 lib/bug.c:184 fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:178 fixup_bug arch/x86/kernel/traps.c:247 [inline] do_error_trap+0x249/0x290 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 invalid_op+0x22/0x40 arch/x86/entry/entry_64.S:1079 RIP: 0010:kvm_arch_vcpu_ioctl_run+0x14d/0x59e0 arch/x86/kvm/x86.c:7375 RSP: 0018:ffff8801bc0d7ac0 EFLAGS: 00010293 RAX: ffff8801d4c7e080 RBX: ffff8801d8c44000 RCX: ffffffff810b889d RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8801d00390a0 RBP: ffff8801bc0d7c00 R08: 1ffff1003a007cab R09: 0000000000000001 R10: ffff8801bc0d7aa0 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8801c12e7580 R14: ffff8801d0038e80 R15: ffff8801d0038e80 kvm_vcpu_ioctl+0x601/0xcb0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2555 vfs_ioctl fs/ioctl.c:46 [inline] do_vfs_ioctl+0x190/0xfe0 fs/ioctl.c:686 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 entry_SYSCALL_64_fastpath+0x23/0x9a RIP: 0033:0x449449 RSP: 002b:00007fe0cfe27ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000006dec84 RCX: 0000000000449449 RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000033 RBP: 00000000006dec80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 00007ffc1be2652f R14: 00007fe0cfe289c0 R15: 0000000000000007 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 0 PID: 3510 Comm: syzkaller176291 Not tainted 4.15.0-rc6-next-20180103+ #87 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:native_write_cr4+0x4/0x10 arch/x86/include/asm/special_insns.h:76 RSP: 0018:ffff8801db407e98 EFLAGS: 00010086 RAX: dffffc0000000000 RBX: 1ffff1003b680fd5 RCX: 0000000000000001 RDX: 1ffffffff0bd907c RSI: 0000000000000000 RDI: 00000000001606f0 RBP: ffff8801db407e98 R08: ffff8801db407f48 R09: ffff8801db407f88 R10: ffff8801d4eff940 R11: 00000000e8b55039 R12: 00000000001606f0 R13: 0000000000000082 R14: ffff8801d4a38140 R15: 0000000000000001 FS: 00007fe0cfe74700(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe0cfe0d000 CR3: 00000001c112a005 CR4: 00000000001626f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __write_cr4 arch/x86/include/asm/paravirt.h:76 [inline] __cr4_set arch/x86/include/asm/tlbflush.h:252 [inline] cr4_clear_bits arch/x86/include/asm/tlbflush.h:275 [inline] cpu_vmxoff arch/x86/include/asm/virtext.h:44 [inline] __cpu_emergency_vmxoff arch/x86/include/asm/virtext.h:59 [inline] cpu_emergency_vmxoff arch/x86/include/asm/virtext.h:67 [inline] smp_reboot_interrupt+0x353/0x450 arch/x86/kernel/smp.c:179 reboot_interrupt+0xa9/0xb0 arch/x86/entry/entry_64.S:913 RIP: 0010:__read_once_size include/linux/compiler.h:188 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:69 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x26/0x50 kernel/kcov.c:101 RSP: 0018:ffff8801d4eff850 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff07 RAX: ffff8801d4a38140 RBX: 1ffff1003a9dff10 RCX: ffffffff8154ed1a RDX: 0000000000000000 RSI: 00000000000000fb RDI: 0000000000000830 RBP: ffff8801d4eff850 R08: 0000000000000007 R09: ffff8801d4eff940 R10: ffff8801d4eff940 R11: 00000000e8b55039 R12: 0000000000000000 R13: 0000000000000001 R14: ffff8801d4e38a80 R15: 0000000000000001 rep_nop arch/x86/include/asm/processor.h:659 [inline] cpu_relax arch/x86/include/asm/processor.h:664 [inline] csd_lock_wait kernel/smp.c:108 [inline] smp_call_function_single+0x1da/0x2f0 kernel/smp.c:302 loaded_vmcs_clear arch/x86/kvm/vmx.c:1617 [inline] vmx_vcpu_load+0x9ae/0xd80 arch/x86/kvm/vmx.c:2354 kvm_arch_vcpu_load+0x149/0x740 arch/x86/kvm/x86.c:2906 vcpu_load+0x32/0x40 arch/x86/kvm/../../../virt/kvm/kvm_main.c:158 kvm_arch_vcpu_ioctl_get_sregs+0x77/0xa10 arch/x86/kvm/x86.c:7484 kvm_vcpu_ioctl+0x419/0xcb0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2595 vfs_ioctl fs/ioctl.c:46 [inline] do_vfs_ioctl+0x190/0xfe0 fs/ioctl.c:686 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 entry_SYSCALL_64_fastpath+0x23/0x9a RIP: 0033:0x449377 RSP: 002b:00007fe0cfe72118 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000006dec54 RCX: 0000000000449377 RDX: 00007fe0cfe72760 RSI: 000000008138ae83 RDI: 0000000000000006 RBP: 00000000006dec50 R08: 0000000000000a63 R09: 0000000000000000 R10: 00007fe0cfe749d0 R11: 0000000000000217 R12: 0000000000000000 R13: 00007ffc1be2652f R14: 00007fe0cfe749c0 R15: 0000000000000007 Code: 0f 1f 80 00 00 00 00 55 48 89 e5 0f 20 d8 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 0f 22 df 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 <0f> 22 e7 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 44 0f 20 c0 5d RIP: native_write_cr4+0x4/0x10 arch/x86/include/asm/special_insns.h:76 RSP: ffff8801db407e98 ---[ end trace fef4a425ded59b53 ]--- Shutting down cpus with NMI invalid opcode: 0000 [#2] SMP KASAN Dumping ftrace buffer: (ftrace buff[e n : 25 Kernel Offset: disabled ---[ end trace fef4a425ded59b54 ]--- Rebooting in 86400 seconds..