linux-kernel - [syzbot] [kernel?] WARNING in enqueue_dl

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Message-ID: <66f839ac.050a0220.aab67.0006.GAE@google.com>
Date: Sat, 28 Sep 2024 10:15:24 -0700
From: syzbot <syzbot+00a022dc9979d67df050@...kaller.appspotmail.com>
To: akpm@...ux-foundation.org, linux-kernel@...r.kernel.org, 
	linux-mm@...ck.org, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [kernel?] WARNING in enqueue_dl_entity

Hello,

syzbot found the following issue on:

HEAD commit:    13882369ceb9 Merge tag 'hid-for-linus-2024092601' of git:/..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=17334507980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=f1af1dc2e43cf22f
dashboard link: https://syzkaller.appspot.com/bug?extid=00a022dc9979d67df050
compiler:       aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: arm64

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/384ffdcca292/non_bootable_disk-13882369.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/a1a2db588faf/vmlinux-13882369.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a3f594a63d31/Image-13882369.gz.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+00a022dc9979d67df050@...kaller.appspotmail.com

------------[ cut here ]------------
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
---[ end trace 0000000000000000 ]---


---
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