INFO: task khugepaged:34 blocked for more than 143 seconds.
Not tainted 6.2.0-syzkaller-12765-g982818426a0f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:khugepaged state:D stack:28192 pid:34 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5304 [inline]
__schedule+0xcce/0x5b20 kernel/sched/core.c:6622
schedule+0xde/0x1a0 kernel/sched/core.c:6698
schedule_timeout+0x276/0x2b0 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x1ce/0x5c0 kernel/sched/completion.c:106
__flush_work+0x595/0xb60 kernel/workqueue.c:3174
__lru_add_drain_all+0x47c/0x7c0 mm/swap.c:897
khugepaged_do_scan mm/khugepaged.c:2438 [inline]
khugepaged+0x105/0x15c0 mm/khugepaged.c:2507
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
INFO: task syz-executor.2:5118 blocked for more than 144 seconds.
Not tainted 6.2.0-syzkaller-12765-g982818426a0f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:24616 pid:5118 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5304 [inline]
__schedule+0xcce/0x5b20 kernel/sched/core.c:6622
schedule+0xde/0x1a0 kernel/sched/core.c:6698
schedule_timeout+0x276/0x2b0 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x1ce/0x5c0 kernel/sched/completion.c:106
__flush_work+0x595/0xb60 kernel/workqueue.c:3174
ext4_put_super+0xdf/0x13c0 fs/ext4/super.c:1214
generic_shutdown_super+0x158/0x480 fs/super.c:491
kill_block_super+0x9b/0xf0 fs/super.c:1398
deactivate_locked_super+0x98/0x160 fs/super.c:331
deactivate_super+0xb1/0xd0 fs/super.c:362
cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1177
task_work_run+0x16f/0x270 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:203
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296
do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fc82ca8d567
RSP: 002b:00007ffcdf43bb28 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fc82ca8d567
RDX: 00007ffcdf43bbfb RSI: 000000000000000a RDI: 00007ffcdf43bbf0
RBP: 00007ffcdf43bbf0 R08: 00000000ffffffff R09: 00007ffcdf43b9c0
R10: 00005555566218b3 R11: 0000000000000246 R12: 00007fc82cae6b24
R13: 00007ffcdf43ccb0 R14: 0000555556621810 R15: 00007ffcdf43ccf0
INFO: task kworker/u4:7:5230 blocked for more than 144 seconds.
Not tainted 6.2.0-syzkaller-12765-g982818426a0f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:7 state:D stack:23920 pid:5230 ppid:2 flags:0x00004000
Workqueue: events_unbound fsnotify_connector_destroy_workfn
Call Trace:
context_switch kernel/sched/core.c:5304 [inline]
__schedule+0xcce/0x5b20 kernel/sched/core.c:6622
schedule+0xde/0x1a0 kernel/sched/core.c:6698
schedule_timeout+0x276/0x2b0 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x1ce/0x5c0 kernel/sched/completion.c:106
__synchronize_srcu+0x19f/0x2a0 kernel/rcu/srcutree.c:1323
fsnotify_connector_destroy_workfn+0x4d/0xa0 fs/notify/mark.c:208
process_one_work+0x9bf/0x1820 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
INFO: task kworker/u4:8:5311 blocked for more than 145 seconds.
Not tainted 6.2.0-syzkaller-12765-g982818426a0f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:8 state:D stack:23224 pid:5311 ppid:2 flags:0x00004000
Workqueue: events_unbound fsnotify_mark_destroy_workfn
Call Trace:
context_switch kernel/sched/core.c:5304 [inline]
__schedule+0xcce/0x5b20 kernel/sched/core.c:6622
schedule+0xde/0x1a0 kernel/sched/core.c:6698
schedule_timeout+0x276/0x2b0 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x1ce/0x5c0 kernel/sched/completion.c:106
__synchronize_srcu+0x19f/0x2a0 kernel/rcu/srcutree.c:1323
fsnotify_mark_destroy_workfn+0x101/0x3c0 fs/notify/mark.c:898
process_one_work+0x9bf/0x1820 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
INFO: task kworker/u4:18:6860 blocked for more than 146 seconds.
Not tainted 6.2.0-syzkaller-12765-g982818426a0f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:18 state:D stack:25064 pid:6860 ppid:2 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
context_switch kernel/sched/core.c:5304 [inline]
__schedule+0xcce/0x5b20 kernel/sched/core.c:6622
schedule+0xde/0x1a0 kernel/sched/core.c:6698
synchronize_rcu_expedited+0x5d4/0x770 kernel/rcu/tree_exp.h:1004
synchronize_rcu+0x2f1/0x3a0 kernel/rcu/tree.c:3483
synchronize_net+0x4e/0x60 net/core/dev.c:10750
nf_conntrack_cleanup_net_list+0x9e/0x5d0 net/netfilter/nf_conntrack_core.c:2542
ops_exit_list+0x125/0x170 net/core/net_namespace.c:174
cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:613
process_one_work+0x9bf/0x1820 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8c7957f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:510
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8c7954f0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:510
1 lock held by khungtaskd/28:
#0: ffffffff8c796340 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6495
1 lock held by khugepaged/34:
#0: ffffffff8c896248 (lock#3){+.+.}-{3:3}, at: __lru_add_drain_all+0x62/0x7c0 mm/swap.c:852
2 locks held by getty/4758:
#0: ffff88814a24b098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
1 lock held by syz-executor.2/5118:
#0: ffff88805dffa0e0 (&type->s_umount_key#31){++++}-{3:3}, at: deactivate_super+0xa9/0xd0 fs/super.c:361
4 locks held by kworker/1:5/5171:
3 locks held by kworker/0:5/5173:
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x86d/0x1820 kernel/workqueue.c:2361
#1: ffffc90004c9fda8 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1820 kernel/workqueue.c:2365
#2: ffffffff8e104c48 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xf/0x70 net/core/link_watch.c:277
2 locks held by kworker/u4:7/5230:
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x86d/0x1820 kernel/workqueue.c:2361
#1: ffffc90004eefda8 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1820 kernel/workqueue.c:2365
2 locks held by kworker/u4:8/5311:
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x86d/0x1820 kernel/workqueue.c:2361
#1: ffffc900052dfda8 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1820 kernel/workqueue.c:2365
5 locks held by kworker/u4:9/5316:
#0: ffff8880305ee938 ((wq_completion)phy9){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8880305ee938 ((wq_completion)phy9){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff8880305ee938 ((wq_completion)phy9){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff8880305ee938 ((wq_completion)phy9){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff8880305ee938 ((wq_completion)phy9){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff8880305ee938 ((wq_completion)phy9){+.+.}-{0:0}, at: process_one_work+0x86d/0x1820 kernel/workqueue.c:2361
#1: ffffc90004fbfda8 ((work_completion)(&sdata->work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1820 kernel/workqueue.c:2365
#2: ffff8880729d0d40 (&wdev->mtx){+.+.}-{3:3}, at: sdata_lock net/mac80211/ieee80211_i.h:1115 [inline]
#2: ffff8880729d0d40 (&wdev->mtx){+.+.}-{3:3}, at: ieee80211_ibss_work+0x94/0x14a0 net/mac80211/ibss.c:1680
#3: ffff888030841710 (&local->sta_mtx){+.+.}-{3:3}, at: ieee80211_ibss_sta_expire net/mac80211/ibss.c:1256 [inline]
#3: ffff888030841710 (&local->sta_mtx){+.+.}-{3:3}, at: ieee80211_sta_merge_ibss net/mac80211/ibss.c:1299 [inline]
#3: ffff888030841710 (&local->sta_mtx){+.+.}-{3:3}, at: ieee80211_ibss_work+0x4a1/0x14a0 net/mac80211/ibss.c:1708
#4: ffffffff8c7a1638 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline]
#4: ffffffff8c7a1638 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3e8/0x770 kernel/rcu/tree_exp.h:989
2 locks held by kworker/u4:12/5360:
4 locks held by kworker/u4:18/6860:
#0: ffff888016617138 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888016617138 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888016617138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888016617138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888016617138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888016617138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x86d/0x1820 kernel/workqueue.c:2361
#1: ffffc90005ccfda8 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1820 kernel/workqueue.c:2365
#2: ffffffff8e0f1010 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9f/0xb10 net/core/net_namespace.c:575
#3: ffffffff8c7a1638 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
#3: ffffffff8c7a1638 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x64a/0x770 kernel/rcu/tree_exp.h:989
3 locks held by kworker/0:16/7231:
#0: ffff888026e62d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888026e62d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888026e62d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888026e62d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888026e62d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888026e62d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x86d/0x1820 kernel/workqueue.c:2361
#1: ffffc9001533fda8 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1820 kernel/workqueue.c:2365
#2: ffffffff8e104c48 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4629
6 locks held by syz-executor.4/13518:
#0: ffff8880775845e8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe7/0x100 fs/file.c:1046
#1: ffff888023f5a460 (sb_writers#10){.+.+}-{0:0}, at: do_writev+0x133/0x2f0 fs/read_write.c:977
#2: ffff8880793fa888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x285/0x600 fs/kernfs/file.c:325
#3: ffffffff8c7ddc08 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_kn_lock_live+0x138/0x520 kernel/cgroup/cgroup.c:1673
#4: ffffffff8c6408f0 (cpu_hotplug_lock){++++}-{0:0}, at: cgroup_attach_lock kernel/cgroup/cgroup.c:2435 [inline]
#4: ffffffff8c6408f0 (cpu_hotplug_lock){++++}-{0:0}, at: cgroup_procs_write_start+0x149/0x670 kernel/cgroup/cgroup.c:2939
#5: ffffffff8c7dd9d0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: cgroup_attach_lock kernel/cgroup/cgroup.c:2437 [inline]
#5: ffffffff8c7dd9d0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: cgroup_procs_write_start+0x155/0x670 kernel/cgroup/cgroup.c:2939
2 locks held by syz-executor.3/13520:
#0: ffff888042f6c0e0 (&type->s_umount_key#79/1){+.+.}-{3:3}, at: alloc_super+0x22e/0xb60 fs/super.c:228
#1: ffffffff8c896248 (lock#3){+.+.}-{3:3}, at: __lru_add_drain_all+0x62/0x7c0 mm/swap.c:852
1 lock held by syz-executor.0/13538:
#0: ffffffff8e104c48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:75 [inline]
#0: ffffffff8e104c48 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e8/0xd50 net/core/rtnetlink.c:6171
1 lock held by dhcpcd/13545:
#0: ffff8880300ce130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1697 [inline]
#0: ffff8880300ce130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xe30 net/packet/af_packet.c:3193
1 lock held by dhcpcd/13546:
#0: ffff8880300d6130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1697 [inline]
#0: ffff8880300d6130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xe30 net/packet/af_packet.c:3193
1 lock held by dhcpcd/13547:
#0: ffff888050d5e130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1697 [inline]
#0: ffff888050d5e130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xe30 net/packet/af_packet.c:3193
1 lock held by dhcpcd/13548:
#0: ffff888040690130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1697 [inline]
#0: ffff888040690130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xe30 net/packet/af_packet.c:3193
1 lock held by dhcpcd/13549:
#0: ffff888040692130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1697 [inline]
#0: ffff888040692130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xe30 net/packet/af_packet.c:3193
1 lock held by dhcpcd/13550:
#0: ffff888040694130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1697 [inline]
#0: ffff888040694130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xe30 net/packet/af_packet.c:3193
1 lock held by syz-executor.0/13552:
#0: ffffffff8e104c48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:75 [inline]
#0: ffffffff8e104c48 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e8/0xd50 net/core/rtnetlink.c:6171
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.2.0-syzkaller-12765-g982818426a0f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
nmi_cpu_backtrace+0x316/0x3e0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x33f/0x460 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xe94/0x11e0 kernel/hung_task.c:379
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5360 Comm: kworker/u4:12 Not tainted 6.2.0-syzkaller-12765-g982818426a0f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Workqueue: bat_events batadv_nc_worker
RIP: 0010:check_preemption_disabled+0xe/0x170 lib/smp_processor_id.c:14
Code: 0f 0b 0f 1f 44 00 00 5b e9 6f fb ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 41 56 41 55 49 89 f5 41 54 55 48 89 fd 53 <0f> 1f 44 00 00 65 44 8b 25 01 a5 eb 75 65 8b 1d f6 a4 eb 75 81 e3
RSP: 0018:ffffc9000557fb10 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8a4c6b20 RDI: ffffffff8aa71780
RBP: ffffffff8aa71780 R08: 0000000000000000 R09: ffffffff8e785b57
R10: fffffbfff1cf0b6a R11: 0000000000000000 R12: ffff88801fa40000
R13: ffffffff8a4c6b20 R14: 00000000ffffffff R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c007cd5000 CR3: 000000000c571000 CR4: 0000000000350ee0
Call Trace:
lockdep_recursion_inc kernel/locking/lockdep.c:462 [inline]
lock_is_held_type+0x67/0x140 kernel/locking/lockdep.c:5711
lock_is_held include/linux/lockdep.h:283 [inline]
rcu_read_lock_sched_held+0x3e/0x70 kernel/rcu/update.c:125
trace_lock_acquire include/trace/events/lock.h:24 [inline]
lock_acquire+0x537/0x670 kernel/locking/lockdep.c:5640
rcu_lock_acquire include/linux/rcupdate.h:327 [inline]
rcu_read_lock include/linux/rcupdate.h:773 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0x131/0xfe0 net/batman-adv/network-coding.c:719
process_one_work+0x9bf/0x1820 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308