syzbot

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WARNING: CPU: 1 PID: 34 at kernel/sched/deadline.c:1995 enqueue_dl_entity+0x47c/0x590 kernel/sched/deadline.c:2029
Modules linked in:
CPU: 1 UID: 0 PID: 34 Comm: kcompactd0 Tainted: G    B              6.11.0-syzkaller-10729-g13882369ceb9 #0
Tainted: [B]=BAD_PAGE
Hardware name: linux,dummy-virt (DT)
pstate: a14000c9 (NzCv daIF +PAN -UAO -TCO +DIT -SSBS BTYPE=--)
pc : enqueue_dl_entity+0x47c/0x590 kernel/sched/deadline.c:1995
lr : dl_server_start+0x44/0x12c kernel/sched/deadline.c:1650
sp : ffff800082eab970
x29: ffff800082eab970 x28: f3f0000004f45c00 x27: 0000000000000000
x26: 0000000000000001 x25: 0000000000000000 x24: 0000000000000048
x23: fff000007f8ee800 x22: 0000000000000001 x21: 000000000016e360
x20: 0000000000000001 x19: fff000007f8ef168 x18: 0000000000000000
x17: fff07ffffd1e0000 x16: ffff800080008000 x15: 0000000000000000
x14: 00000000000002e1 x13: 0000000000000377 x12: 0000000000000001
x11: fff000007f8ee880 x10: 0000000000000001 x9 : 0000000000000048
x8 : 0000000000100000 x7 : 0000000000000001 x6 : f3f0000004f45bc0
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000
x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000001
Call trace:
 enqueue_dl_entity+0x47c/0x590 kernel/sched/deadline.c:2029
 dl_server_start+0x44/0x12c kernel/sched/deadline.c:1650
 enqueue_task_fair+0x11c/0x3a4 kernel/sched/fair.c:7040
 enqueue_task+0x58/0xbc kernel/sched/core.c:2020
 activate_task+0x68/0x80 kernel/sched/core.c:2062
 attach_task+0x4c/0x74 kernel/sched/fair.c:9631
 attach_tasks kernel/sched/fair.c:9666 [inline]
 sched_balance_rq+0x488/0xc74 kernel/sched/fair.c:11743
 sched_balance_newidle.constprop.0+0x1b0/0x3e4 kernel/sched/fair.c:12785
 pick_next_task_fair+0x50/0x320 kernel/sched/fair.c:8933
 __pick_next_task kernel/sched/core.c:5955 [inline]
 pick_next_task kernel/sched/core.c:6477 [inline]
 __schedule+0x158/0x8e8 kernel/sched/core.c:6629
 __schedule_loop kernel/sched/core.c:6752 [inline]
 schedule+0x34/0x104 kernel/sched/core.c:6767
 schedule_timeout+0x80/0xf4 kernel/time/timer.c:2615
 kcompactd+0x204/0x374 mm/compaction.c:3181
 kthread+0x114/0x118 kernel/kthread.c:389
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860
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