------------[ cut here ]------------
WARNING: CPU: 1 PID: 2138 at kernel/signal.c:2090 do_jobctl_trap kernel/signal.c:2090 [inline]()
WARNING: CPU: 1 PID: 2138 at kernel/signal.c:2090 get_signal+0x12d4/0x1570 kernel/signal.c:2209()
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 2138 Comm: syz-executor2 Not tainted 4.4.169+ #2
 0000000000000000 d11640ce9e3cbaab ffff8801c0c4fad8 ffffffff81aab9c1
 0000000000000000 ffffffff82835ee0 ffffffff8283bd40 000000000000082a
 ffffffff81101664 ffff8801c0c4fbb8 ffffffff813a46d2 0000000041b58ab3
Call Trace:
 [<ffffffff81aab9c1>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81aab9c1>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<ffffffff813a46d2>] panic+0x1b9/0x37b kernel/panic.c:112
 [<ffffffff813a48c9>] warn_slowpath_common kernel/panic.c:455 [inline]
 [<ffffffff813a48c9>] warn_slowpath_common.cold+0x20/0x20 kernel/panic.c:435
 [<ffffffff810d3aca>] warn_slowpath_null+0x2a/0x30 kernel/panic.c:492
 [<ffffffff81101664>] do_jobctl_trap kernel/signal.c:2090 [inline]
 [<ffffffff81101664>] get_signal+0x12d4/0x1570 kernel/signal.c:2209
 [<ffffffff8100bd4c>] do_signal+0x9c/0x1840 arch/x86/kernel/signal.c:712
 [<ffffffff81003da7>] exit_to_usermode_loop+0x127/0x170 arch/x86/entry/common.c:184
 [<ffffffff8100569b>] prepare_exit_to_usermode arch/x86/entry/common.c:221 [inline]
 [<ffffffff8100569b>] syscall_return_slowpath+0x25b/0x2e0 arch/x86/entry/common.c:286
 [<ffffffff827154e1>] int_ret_from_sys_call+0x25/0xa3
Shutting down cpus with NMI
Kernel Offset: disabled
Rebooting in 86400 seconds..