WARNING: CPU: 0 PID: 5072 at ./arch/x86/include/asm/fpu/internal.h:340 copy_xregs_to_kernel arch/x86/include/asm/fpu/internal.h:340 [inline]
WARNING: CPU: 0 PID: 5072 at ./arch/x86/include/asm/fpu/internal.h:340 copy_fpregs_to_fpstate arch/x86/include/asm/fpu/internal.h:413 [inline]
WARNING: CPU: 0 PID: 5072 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: 0 PID: 5072 Comm: syz-executor2 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:ffffc90001067d18 EFLAGS: 00010293
RAX: ffff8801e119c500 RBX: ffff8801e168b9c0 RCX: ffffffff810d6e85
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8801e168ba00
RBP: ffffc90001067d38 R08: 000000000002dd38 R09: ffff8801e168ba00
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801e119d900
R13: ffff8801e168ba00 R14: ffffc90001134000 R15: ffff8801e1ea6600
 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: 0033:0x455399
RSP: 002b:0000000000a2f748 EFLAGS: 00000202 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fdd9b80d700 RCX: 0000000000455399
RDX: 00007fdd9b80d9d0 RSI: 00007fdd9b80cdb0 RDI: 00000000003d0f00
RBP: 0000000000a2f880 R08: 00007fdd9b80d700 R09: 00007fdd9b80d700
R10: 00007fdd9b80d9d0 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000a2f7ff R14: 00007fdd9b80d9c0 R15: 000000000000001c
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled