------------[ 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:
 [<ffffffff81d95bd9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d95bd9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8142f7e1>] panic+0x1bc/0x3a8 kernel/panic.c:179
 [<ffffffff81131334>] __warn+0x1c4/0x1e0 kernel/panic.c:542
 [<ffffffff8113159c>] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585
 [<ffffffff8106e4b6>] __fpregs_activate arch/x86/include/asm/fpu/internal.h:534 [inline]
 [<ffffffff8106e4b6>] fpregs_activate arch/x86/include/asm/fpu/internal.h:566 [inline]
 [<ffffffff8106e4b6>] fpu__restore+0x6b6/0x8c0 arch/x86/kernel/fpu/core.c:461
 [<ffffffff81072d98>] __fpu__restore_sig+0x3d8/0x1330 arch/x86/kernel/fpu/signal.c:349
 [<ffffffff81074217>] fpu__restore_sig+0x87/0xe0 arch/x86/kernel/fpu/signal.c:388
 [<ffffffff8111db01>] ia32_restore_sigcontext+0x3d1/0x490 arch/x86/ia32/ia32_signal.c:108
 [<ffffffff8111e535>] sys32_rt_sigreturn+0x1d5/0x290 arch/x86/ia32/ia32_signal.c:156
 [<ffffffff81006f95>] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline]
 [<ffffffff81006f95>] do_fast_syscall_32+0x2f5/0x870 arch/x86/entry/common.c:387
 [<ffffffff838b8250>] 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..