------------[ cut here ]------------ WARNING: CPU: 1 PID: 5416 at ./arch/x86/include/asm/fpu/internal.h:534 __fpregs_activate arch/x86/include/asm/fpu/internal.h:534 [inline] WARNING: CPU: 1 PID: 5416 at ./arch/x86/include/asm/fpu/internal.h:534 fpregs_activate arch/x86/include/asm/fpu/internal.h:566 [inline] WARNING: CPU: 1 PID: 5416 at ./arch/x86/include/asm/fpu/internal.h:534 fpu__restore+0x6b6/0x8c0 arch/x86/kernel/fpu/core.c:461 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 5416 Comm: syz-executor5 Not tainted 4.9.87-gfc8bd0f #6 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801cc36fa98 ffffffff81d95bd9 ffffffff83a480c0 ffff8801cc36fb70 ffffffff83a1e200 ffffffff8106e4b6 0000000000000009 ffff8801cc36fb60 ffffffff8142f7e1 0000000041b58ab3 ffffffff8418b890 ffffffff8142f625 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] panic+0x1bc/0x3a8 kernel/panic.c:179 [] __warn+0x1c4/0x1e0 kernel/panic.c:542 [] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585 [] __fpregs_activate arch/x86/include/asm/fpu/internal.h:534 [inline] [] fpregs_activate arch/x86/include/asm/fpu/internal.h:566 [inline] [] fpu__restore+0x6b6/0x8c0 arch/x86/kernel/fpu/core.c:461 [] __fpu__restore_sig+0x3d8/0x1330 arch/x86/kernel/fpu/signal.c:349 [] fpu__restore_sig+0x87/0xe0 arch/x86/kernel/fpu/signal.c:388 [] ia32_restore_sigcontext+0x3d1/0x490 arch/x86/ia32/ia32_signal.c:108 [] sys32_rt_sigreturn+0x1d5/0x290 arch/x86/ia32/ia32_signal.c:156 [] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline] [] do_fast_syscall_32+0x2f5/0x870 arch/x86/entry/common.c:387 [] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..