syzbot has found a reproducer for the following issue on: HEAD commit: 28eb75e178d3 Merge tag 'drm-next-2024-11-21' of https://gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1402175f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=5606b6814de0f638 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 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1016fec0580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/384ffdcca292/non_bootable_disk-28eb75e1.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4053ed867efd/vmlinux-28eb75e1.xz kernel image: https://storage.googleapis.com/syzbot-assets/903039310aac/Image-28eb75e1.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+00a022dc9979d67df050@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ WARNING: CPU: 0 PID: 10 at kernel/sched/deadline.c:1995 enqueue_dl_entity+0x478/0x58c kernel/sched/deadline.c:2029 Modules linked in: CPU: 0 UID: 0 PID: 10 Comm: kworker/0:1 Not tainted 6.12.0-syzkaller-07749-g28eb75e178d3 #0 Hardware name: linux,dummy-virt (DT) Workqueue: 0x0 (events) pstate: a14000c9 (NzCv daIF +PAN -UAO -TCO +DIT -SSBS BTYPE=--) pc : enqueue_dl_entity+0x478/0x58c kernel/sched/deadline.c:1995 lr : dl_server_start+0x44/0x12c kernel/sched/deadline.c:1650 sp : ffff800082b33a10 x29: ffff800082b33a10 x28: fdf0000004e5dc00 x27: 0000000000000000 x26: 0000000000000001 x25: 0000000000000000 x24: 0000000000000048 x23: fff000007f8d7600 x22: 0000000000000001 x21: 000000000016e360 x20: 0000000000000001 x19: fff000007f8d7f68 x18: 0000000000000000 x17: 0000000000000004 x16: 0000000000000002 x15: 0000000000000000 x14: 0000000000000142 x13: 00000000000003db x12: 0000000000000001 x11: fff000007f8d7680 x10: 0000000000000284 x9 : 0000000000000048 x8 : 0000000000100000 x7 : 0000000000000000 x6 : fdf0000004e5dbc0 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000001 Call trace: enqueue_dl_entity+0x478/0x58c kernel/sched/deadline.c:2029 (P) dl_server_start+0x44/0x12c kernel/sched/deadline.c:1650 (L) dl_server_start+0x44/0x12c kernel/sched/deadline.c:1650 enqueue_task_fair+0x11c/0x3a4 kernel/sched/fair.c:7038 enqueue_task+0x3c/0xe4 kernel/sched/core.c:2061 activate_task+0x68/0x80 kernel/sched/core.c:2108 attach_task+0x4c/0x74 kernel/sched/fair.c:9635 attach_tasks kernel/sched/fair.c:9670 [inline] sched_balance_rq+0x580/0xc74 kernel/sched/fair.c:11747 sched_balance_newidle.constprop.0+0x1b0/0x3e4 kernel/sched/fair.c:12789 pick_next_task_fair+0x50/0x320 kernel/sched/fair.c:8937 __pick_next_task kernel/sched/core.c:6023 [inline] pick_next_task kernel/sched/core.c:6542 [inline] __schedule+0x15c/0x900 kernel/sched/core.c:6709 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0x34/0x104 kernel/sched/core.c:6848 worker_thread+0x19c/0x354 kernel/workqueue.c:3406 kthread+0x114/0x118 kernel/kthread.c:389 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 ---[ end trace 0000000000000000 ]--- --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.
