WARNING: CPU: 1 PID: 4060 at ./arch/x86/include/asm/fpu/internal.h:340 copy_xregs_to_kernel arch/x86/include/asm/fpu/internal.h:340 [inline] WARNING: CPU: 1 PID: 4060 at ./arch/x86/include/asm/fpu/internal.h:340 copy_fpregs_to_fpstate arch/x86/include/asm/fpu/internal.h:413 [inline] WARNING: CPU: 1 PID: 4060 at ./arch/x86/include/asm/fpu/internal.h:340 fpu__copy+0x385/0x390 arch/x86/kernel/fpu/core.c:212 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 4060 Comm: syz-executor7 Not tainted 4.15.0-rc3-next-20171214+ #67 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+0xe9/0x14b lib/dump_stack.c:53 panic+0x10e/0x2f8 kernel/panic.c:183 __warn+0x14e/0x150 kernel/panic.c:547 report_bug+0x11e/0x1a0 lib/bug.c:184 fixup_bug.part.11+0x17/0x30 arch/x86/kernel/traps.c:177 fixup_bug arch/x86/kernel/traps.c:246 [inline] do_error_trap+0x14a/0x180 arch/x86/kernel/traps.c:295 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314 invalid_op+0x22/0x40 arch/x86/entry/entry_64.S:1079 RIP: 0010:copy_xregs_to_kernel arch/x86/include/asm/fpu/internal.h:340 [inline] RIP: 0010:copy_fpregs_to_fpstate arch/x86/include/asm/fpu/internal.h:413 [inline] RIP: 0010:fpu__copy+0x385/0x390 arch/x86/kernel/fpu/core.c:212 RSP: 0018:ffffc90000da7d18 EFLAGS: 00010293 RAX: ffff8801dbed6340 RBX: ffff8801de6d1ac0 RCX: ffffffff810d6e85 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8801de6d1b00 RBP: ffffc90000da7d38 R08: 000000000002dd38 R09: ffff8801de6d1b00 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801dbed7740 R13: ffff8801de6d1b00 R14: ffffc90000e4c000 R15: ffff8801df839bc0 arch_dup_task_struct+0x27/0x30 arch/x86/kernel/process.c:100 dup_task_struct kernel/fork.c:786 [inline] copy_process.part.35+0x161/0x2240 kernel/fork.c:1639 copy_process kernel/fork.c:1614 [inline] _do_fork+0x122/0x880 kernel/fork.c:2095 SYSC_clone kernel/fork.c:2202 [inline] SyS_clone+0x37/0x50 kernel/fork.c:2196 do_syscall_64+0x7f/0x270 arch/x86/entry/common.c:285 entry_SYSCALL64_slow_path+0x25/0x25 RIP: 0033:0x4553c9 RSP: 002b:0000000000a6f748 EFLAGS: 00000202 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007f3e34d88700 RCX: 00000000004553c9 RDX: 00007f3e34d889d0 RSI: 00007f3e34d87db0 RDI: 00000000003d0f00 RBP: 0000000000a6f880 R08: 00007f3e34d88700 R09: 00007f3e34d88700 R10: 00007f3e34d889d0 R11: 0000000000000202 R12: 0000000000000000 R13: 0000000000a6f7ff R14: 00007f3e34d889c0 R15: 0000000000000000 general protection fault: 0000 [#1] SMP Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 0 PID: 4022 Comm: syz-executor3 Not tainted 4.15.0-rc3-next-20171214+ #67 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:ffff88021fc03fb8 EFLAGS: 00010082 RAX: 0000000000000000 RBX: 0000000000000086 RCX: 0000000000000000 RDX: 00000000001606f0 RSI: 0000000000000001 RDI: 00000000001606f0 RBP: ffff88021fc03fb8 R08: 0000000000000001 R09: ffff88021fc03fdc R10: ffffc90000e5fc80 R11: 0000000000000004 R12: 0000000000000001 R13: ffffffff8108d3b0 R14: ffff8801dbcf57d8 R15: ffff8801dbd00580 FS: 00007fa5ec7af700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000a6fa38 CR3: 00000001de6fe001 CR4: 00000000001626f0 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+0xe2/0x180 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:183 [inline] RIP: 0010:csd_lock_wait kernel/smp.c:108 [inline] RIP: 0010:smp_call_function_single+0xed/0x170 kernel/smp.c:302 RSP: 0018:ffffc90000e5fc00 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff07 RAX: 0000000000000003 RBX: 0000000000000000 RCX: ffffffff8127b3f8 RDX: 0000000000010000 RSI: ffffc90002e66000 RDI: 0000000000000830 RBP: ffffc90000e5fc50 R08: ffffffff8102580c R09: 0000000000000004 R10: ffffc90000e5fc80 R11: 0000000000000004 R12: 0000000000000001 R13: ffffffff8108d3b0 R14: ffff8801dbcf57d8 R15: ffff8801dbd00580 loaded_vmcs_clear arch/x86/kvm/vmx.c:1584 [inline] vmx_vcpu_load+0x3ca/0x4a0 arch/x86/kvm/vmx.c:2272 kvm_arch_vcpu_load+0x85/0x2d0 arch/x86/kvm/x86.c:2863 vcpu_load+0x4b/0x70 arch/x86/kvm/../../../virt/kvm/kvm_main.c:162 kvm_vcpu_ioctl+0x79/0x820 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2544 vfs_ioctl fs/ioctl.c:46 [inline] do_vfs_ioctl+0xaf/0x840 fs/ioctl.c:686 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452a39 RSP: 002b:00007fa5ec7aec58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000020a72000 RCX: 0000000000452a39 RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 000000000000001e RBP: 0000000020a72800 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000019 R13: 0000000020a71000 R14: 00007fa5ec7af6d4 R15: 0000000000000000 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: ffff88021fc03fb8 ---[ end trace 7db02a9d12cebc61 ]--- Shutting down cpus with NMI invalid opcode: 0000 [#2] SMP Dumping ftrace buffer: (ftrace buffer e[m pt y2)5 . Rebooting in 86400 seconds.. ---[ end trace 7db02a9d12cebc62 ]---