INFO: task syz-executor.0:22312 blocked for more than 143 seconds.
      Not tainted 6.8.0-rc3-syzkaller-00822-g970cb1ceda17 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:22520 pid:22312 tgid:22311 ppid:12954  flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0x17d1/0x49f0 kernel/sched/core.c:6727
 __schedule_loop kernel/sched/core.c:6802 [inline]
 schedule+0x149/0x260 kernel/sched/core.c:6817
 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2159
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common kernel/sched/completion.c:127 [inline]
 wait_for_completion+0x354/0x620 kernel/sched/completion.c:148
 __flush_work+0x950/0xad0 kernel/workqueue.c:3410
 nsim_fib_destroy+0xa1/0x180 drivers/net/netdevsim/fib.c:1658
 nsim_dev_reload_destroy+0x2e3/0x490 drivers/net/netdevsim/dev.c:1662
 nsim_dev_reload_down+0x98/0xd0 drivers/net/netdevsim/dev.c:965
 devlink_reload+0x189/0x870 net/devlink/dev.c:461
 devlink_nl_reload_doit+0x9c3/0xe50 net/devlink/dev.c:586
 genl_family_rcv_msg_doit net/netlink/genetlink.c:1113 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:1193 [inline]
 genl_rcv_msg+0xad6/0xe50 net/netlink/genetlink.c:1208
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1217
 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]
 netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1367
 netlink_sendmsg+0xa3b/0xd70 net/netlink/af_netlink.c:1908
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584
 ___sys_sendmsg net/socket.c:2638 [inline]
 __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667
 do_syscall_64+0xf9/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f418fa7dda9
RSP: 002b:00007f419089f0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f418fbabf80 RCX: 00007f418fa7dda9
RDX: 0000000000000000 RSI: 00000000200003c0 RDI: 0000000000000004
RBP: 00007f418faca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f418fbabf80 R15: 00007ffc4bcd2b08
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/29:
 #0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
 #0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
 #0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by getty/4822:
 #0: ffff8880307300a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
2 locks held by kworker/u4:8/20340:
3 locks held by kworker/1:8/21160:
 #0: ffff888014c8cd38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
 #0: ffff888014c8cd38 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
 #1: ffffc900175e7d20 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
 #1: ffffc900175e7d20 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
 #2: ffff8880a5c51240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x2d1/0x4130 drivers/net/netdevsim/fib.c:1489
3 locks held by syz-executor.0/22312:
 #0: ffffffff8f3da310 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1216
 #1: ffff8880445360e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
 #1: ffff8880445360e8 (&dev->mutex){....}-{3:3}, at: devl_dev_lock net/devlink/devl_internal.h:108 [inline]
 #1: ffff8880445360e8 (&dev->mutex){....}-{3:3}, at: devlink_get_from_attrs_lock+0x159/0x3d0 net/devlink/netlink.c:196
 #2: ffff888044535250 (&devlink->lock_key#7){+.+.}-{3:3}, at: devl_dev_lock net/devlink/devl_internal.h:109 [inline]
 #2: ffff888044535250 (&devlink->lock_key#7){+.+.}-{3:3}, at: devlink_get_from_attrs_lock+0x168/0x3d0 net/devlink/netlink.c:196
5 locks held by syz-executor.0/22681:
 #0: ffff88802c6de420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2795 [inline]
 #0: ffff88802c6de420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x233/0xcb0 fs/read_write.c:586
 #1: ffff8880ad766c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1eb/0x500 fs/kernfs/file.c:325
 #2: ffff8880229f97c8 (kn->active#50){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20f/0x500 fs/kernfs/file.c:326
 #3: ffffffff8ecb61e8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216
 #4: ffff8880445360e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
 #4: ffff8880445360e8 (&dev->mutex){....}-{3:3}, at: device_del+0xa6/0xa30 drivers/base/core.c:3776
4 locks held by syz-executor.0/27758:
 #0: ffff88802c6de420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2795 [inline]
 #0: ffff88802c6de420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x233/0xcb0 fs/read_write.c:586
 #1: ffff8880b03e3088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1eb/0x500 fs/kernfs/file.c:325
 #2: ffff8880229f97c8 (kn->active#50){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20f/0x500 fs/kernfs/file.c:326
 #3: ffffffff8ecb61e8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216
1 lock held by syz-executor.2/30359:
 #0: ffff8880b953c958 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
2 locks held by syz-executor.1/30362:

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

NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc3-syzkaller-00822-g970cb1ceda17 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xfaf/0xff0 kernel/hung_task.c:379
 kthread+0x2ef/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4513 Comm: klogd Not tainted 6.8.0-rc3-syzkaller-00822-g970cb1ceda17 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:__update_load_avg_se+0x6a9/0xaf0 kernel/sched/pelt.c:318
Code: 85 ed 79 15 81 e5 ff ff ff 7f 0f b6 04 33 84 c0 0f 85 e6 03 00 00 41 89 2e 4c 89 ff e8 30 f8 ff ff b8 01 00 00 00 eb 02 31 c0 <48> 83 c4 48 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc 44 89 f3
RSP: 0018:ffffc9000316f5f8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 00000000000002f6 RCX: 00000230860bd800
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: ffff88802af73c48
RBP: 1ffff110055ee79b R08: ffffffff8f858d6f R09: 1ffffffff1f0b1ad
R10: dffffc0000000000 R11: fffffbfff1f0b1ae R12: 000000000000002f
R13: ffff88802af73cdc R14: 0000000000000325 R15: ffff88802af73c00
FS:  00007fcb72060380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8b7c379198 CR3: 000000002f4a6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 update_load_avg+0x183/0x19e0 kernel/sched/fair.c:4739
 enqueue_entity+0x73/0x1930 kernel/sched/fair.c:5286
 enqueue_task_fair+0x171/0x8e0 kernel/sched/fair.c:6731
 enqueue_task+0x1a1/0x2f0 kernel/sched/core.c:2118
 activate_task kernel/sched/core.c:2148 [inline]
 ttwu_do_activate+0x1d1/0x7e0 kernel/sched/core.c:3795
 ttwu_queue kernel/sched/core.c:4048 [inline]
 try_to_wake_up+0x88a/0x1470 kernel/sched/core.c:4369
 autoremove_wake_function+0x16/0x110 kernel/sched/wait.c:384
 __wake_up_common kernel/sched/wait.c:89 [inline]
 __wake_up_common_lock+0x130/0x1e0 kernel/sched/wait.c:106
 sock_def_readable+0x1ea/0x450 net/core/sock.c:3353
 unix_dgram_sendmsg+0x148d/0x1f80 net/unix/af_unix.c:2172
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 __sys_sendto+0x3a4/0x4f0 net/socket.c:2191
 __do_sys_sendto net/socket.c:2203 [inline]
 __se_sys_sendto net/socket.c:2199 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2199
 do_syscall_64+0xf9/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7fcb721c29b5
Code: 8b 44 24 08 48 83 c4 28 48 98 c3 48 98 c3 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 26 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 7a 48 8b 15 44 c4 0c 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffdddeb3b58 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fcb721c29b5
RDX: 000000000000004c RSI: 0000555fcee192b0 RDI: 0000000000000003
RBP: 0000555fcee12910 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000013
R13: 00007fcb72350212 R14: 00007ffdddeb3c58 R15: 0000000000000000
 </TASK>