------------[ cut here ]------------
WARNING: CPU: 1 PID: 25304 at ./arch/x86/include/asm/fpu/internal.h:534 __fpregs_activate arch/x86/include/asm/fpu/internal.h:534 [inline]
WARNING: CPU: 1 PID: 25304 at ./arch/x86/include/asm/fpu/internal.h:534 fpregs_activate arch/x86/include/asm/fpu/internal.h:566 [inline]
WARNING: CPU: 1 PID: 25304 at ./arch/x86/include/asm/fpu/internal.h:534 fpu__restore+0x6aa/0x8b0 arch/x86/kernel/fpu/core.c:461
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 25304 Comm: syz-executor4 Not tainted 4.9.105-gd7e64f8 #43
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d978faa8 ffffffff81eb41a9 ffffffff83c48b40 00000000ffffffff
 0000000000000000 0000000000000001 0000000000000216 ffff8801d978fb68
 ffffffff81421e15 0000000041b58ab3 ffffffff843b9990 ffffffff81421c56
Call Trace:
 [<ffffffff81eb41a9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eb41a9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81421e15>] panic+0x1bf/0x3bc kernel/panic.c:179
 [<ffffffff81422101>] __warn.cold.9+0xc1/0x17f kernel/panic.c:542
 [<ffffffff811367cc>] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585
 [<ffffffff8106dafa>] __fpregs_activate arch/x86/include/asm/fpu/internal.h:534 [inline]
 [<ffffffff8106dafa>] fpregs_activate arch/x86/include/asm/fpu/internal.h:566 [inline]
 [<ffffffff8106dafa>] fpu__restore+0x6aa/0x8b0 arch/x86/kernel/fpu/core.c:461
 [<ffffffff8107225e>] __fpu__restore_sig+0x4ee/0x1290 arch/x86/kernel/fpu/signal.c:349
 [<ffffffff81073527>] fpu__restore_sig+0x87/0xe0 arch/x86/kernel/fpu/signal.c:388
 [<ffffffff8111b66d>] ia32_restore_sigcontext+0x3cd/0x490 arch/x86/ia32/ia32_signal.c:108
 [<ffffffff8111c0a5>] sys32_rt_sigreturn+0x1d5/0x290 arch/x86/ia32/ia32_signal.c:156
 [<ffffffff81006da7>] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline]
 [<ffffffff81006da7>] do_fast_syscall_32+0x2f7/0x870 arch/x86/entry/common.c:387
 [<ffffffff839fb210>] 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..