------------[ cut here ]------------
WARNING: CPU: 1 PID: 3897 at kernel/signal.c:2086 do_jobctl_trap kernel/signal.c:2086 [inline]()
WARNING: CPU: 1 PID: 3897 at kernel/signal.c:2086 get_signal+0x11e3/0x14b0 kernel/signal.c:2205()
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 3897 Comm: syz-executor0 Not tainted 4.4.128-gbd23e3a #19
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 957cae1186f63ffc ffff8800aa1dfb28 ffffffff81e0daad
 ffffffff83a43ec0 ffff8800bb1fb000 ffffffff83a49b00 0000000000000009
 0000000000000826 ffff8800aa1dfbe8 ffffffff81409eb4 0000000041b58ab3
Call Trace:
 [<ffffffff81e0daad>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81e0daad>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81409eb4>] panic+0x19e/0x38d kernel/panic.c:112
 [<ffffffff8140a0d8>] warn_slowpath_common.cold.6+0x20/0x20 kernel/panic.c:455
 [<ffffffff81130049>] warn_slowpath_null+0x29/0x30 kernel/panic.c:492
 [<ffffffff8115f133>] do_jobctl_trap kernel/signal.c:2086 [inline]
 [<ffffffff8115f133>] get_signal+0x11e3/0x14b0 kernel/signal.c:2205
 [<ffffffff8100e02b>] do_signal+0x8b/0x1d30 arch/x86/kernel/signal.c:712
 [<ffffffff8100360a>] exit_to_usermode_loop+0x11a/0x160 arch/x86/entry/common.c:248
 [<ffffffff81007090>] prepare_exit_to_usermode arch/x86/entry/common.c:283 [inline]
 [<ffffffff81007090>] syscall_return_slowpath arch/x86/entry/common.c:348 [inline]
 [<ffffffff81007090>] do_syscall_32_irqs_on arch/x86/entry/common.c:398 [inline]
 [<ffffffff81007090>] do_fast_syscall_32+0x620/0x8b0 arch/x86/entry/common.c:459
 [<ffffffff838c00aa>] sysenter_flags_fixed+0xd/0x17
Shutting down cpus with NMI
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..