INFO: task syz-executor.4:15512 blocked for more than 143 seconds.
      Not tainted 5.13.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:21872 pid:15512 ppid:  8460 flags:0x00004004
Call Trace:
 context_switch kernel/sched/core.c:4683 [inline]
 __schedule+0xc07/0x11f0 kernel/sched/core.c:5940
 schedule+0x14b/0x210 kernel/sched/core.c:6019
 perf_event_free_task+0x575/0x6a0 kernel/events/core.c:12775
 copy_process+0x432e/0x5b30 kernel/fork.c:2385
 kernel_clone+0x21a/0x7d0 kernel/fork.c:2509
 __do_sys_clone3 kernel/fork.c:2784 [inline]
 __se_sys_clone3+0x36b/0x410 kernel/fork.c:2768
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
RSP: 002b:00007fb6da7e1188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020000680
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038
R13: 00007fff699aef7f R14: 00007fb6da7e1300 R15: 0000000000022000

Showing all locks held in the system:
2 locks held by kworker/u4:1/25:
 #0: ffff8880b9b35498 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x1b/0x30 kernel/sched/core.c:460
 #1: ffff8880b9b1f848 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x50b/0x820 kernel/sched/psi.c:880
1 lock held by khungtaskd/1640:
 #0: ffffffff8cf179c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151
1 lock held by in:imklog/8122:
 #0: ffff8880200ffc70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:974

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 1640 Comm: khungtaskd Not tainted 5.13.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack_lvl+0x1d3/0x29f lib/dump_stack.c:96
 nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x191/0x2f0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline]
 watchdog+0xd06/0xd50 kernel/hung_task.c:294
 kthread+0x453/0x480 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 9968 Comm: kworker/u4:6 Not tainted 5.13.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
RIP: 0010:rcu_lockdep_current_cpu_online+0x69/0x130 kernel/rcu/tree.c:1216
Code: 00 00 49 bf 00 00 00 00 00 fc ff df 48 8d 1c dd 60 e6 14 8c 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 e7 d0 5d 00 <48> 8b 03 48 8d 98 00 63 03 00 48 8d b8 18 63 03 00 48 89 f8 48 c1
RSP: 0018:ffffc900161b77d8 EFLAGS: 00000246
RAX: 1ffffffff1829ccd RBX: ffffffff8c14e668 RCX: 0000000080000001
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffffc900161b7888 R08: dffffc0000000000 R09: fffffbfff1c7320e
R10: fffffbfff1c7320e R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff92002c36f24 R14: dffffc0000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8d34bf4028 CR3: 000000003689d000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 rcu_read_lock_held_common kernel/rcu/update.c:112 [inline]
 rcu_read_lock_sched_held+0x72/0x110 kernel/rcu/update.c:123
 trace_lock_acquire+0x6b/0x180 include/trace/events/lock.h:13
 lock_acquire+0xa4/0x4a0 kernel/locking/lockdep.c:5596
 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:267
 rcu_read_lock include/linux/rcupdate.h:671 [inline]
 batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:756 [inline]
 batadv_iv_ogm_schedule_buff net/batman-adv/bat_iv_ogm.c:827 [inline]
 batadv_iv_ogm_schedule+0x41b/0x1020 net/batman-adv/bat_iv_ogm.c:871
 batadv_iv_send_outstanding_bat_ogm_packet+0x71c/0x830 net/batman-adv/bat_iv_ogm.c:1725
 process_one_work+0x833/0x10c0 kernel/workqueue.c:2276
 worker_thread+0xac1/0x1320 kernel/workqueue.c:2422
 kthread+0x453/0x480 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295