------------[ cut here ]------------
WARNING: CPU: 1 PID: 2524 at kernel/sched/deadline.c:344 setup_new_dl_entity kernel/sched/deadline.c:344 [inline]
WARNING: CPU: 1 PID: 2524 at kernel/sched/deadline.c:344 switched_to_dl kernel/sched/deadline.c:1861 [inline]
WARNING: CPU: 1 PID: 2524 at kernel/sched/deadline.c:344 switched_to_dl+0x651/0x870 kernel/sched/deadline.c:1848
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 2524 Comm: syz-executor.3 Not tainted 4.9.155+ #27
 ffff8801ae8b7b58 ffffffff81b47871 0000000000000000 ffffffff82a39be0
 00000000ffffffff 0000000000000001 0000000000000009 ffff8801ae8b7c38
 ffffffff813f746a 0000000041b58ab3 ffffffff82e35b4a ffffffff813f7291
Call Trace:
 [<ffffffff81b47871>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b47871>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<ffffffff813f746a>] panic+0x1d9/0x3bd kernel/panic.c:180
 [<ffffffff813f76ab>] __warn.cold+0x2f/0x2f kernel/panic.c:546
 [<ffffffff810dae7d>] warn_slowpath_null+0x2d/0x40 kernel/panic.c:589
 [<ffffffff811e7aa1>] setup_new_dl_entity kernel/sched/deadline.c:344 [inline]
 [<ffffffff811e7aa1>] switched_to_dl kernel/sched/deadline.c:1861 [inline]
 [<ffffffff811e7aa1>] switched_to_dl+0x651/0x870 kernel/sched/deadline.c:1848
 [<ffffffff8116aad6>] check_class_changed kernel/sched/core.c:959 [inline]
 [<ffffffff8116aad6>] __sched_setscheduler+0x906/0x3060 kernel/sched/core.c:4396
 [<ffffffff8117aa8c>] sched_setattr kernel/sched/core.c:4449 [inline]
 [<ffffffff8117aa8c>] SYSC_sched_setattr kernel/sched/core.c:4623 [inline]
 [<ffffffff8117aa8c>] SyS_sched_setattr+0x25c/0x3d0 kernel/sched/core.c:4602
 [<ffffffff810056bd>] do_syscall_64+0x1ad/0x570 arch/x86/entry/common.c:285
 [<ffffffff82816a93>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Shutting down cpus with NMI
Kernel Offset: disabled
Rebooting in 86400 seconds..