INFO: task kworker/u4:18:9090 blocked for more than 150 seconds.
Not tainted 6.1.0-next-20221219-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:18 state:D stack:23672 pid:9090 ppid:2 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x2544/0x53f0 kernel/sched/core.c:6555
schedule+0xde/0x1b0 kernel/sched/core.c:6631
rxrpc_destroy_all_calls+0x1ee/0x640 net/rxrpc/call_object.c:733
rxrpc_exit_net+0x15c/0x300 net/rxrpc/net_ns.c:125
ops_exit_list+0xb0/0x170 net/core/net_namespace.c:169
cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:606
process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
worker_thread+0x669/0x1090 kernel/workqueue.c:2436
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: ffffffff8c791d70 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8c791a70 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/28:
#0: ffffffff8c7928c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x57/0x2c2 kernel/locking/lockdep.c:6494
2 locks held by getty/4749:
#0: ffff88802b693098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
3 locks held by kworker/u4:18/9090:
#0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260
#1: ffffc90003a2fda8 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264
#2: ffffffff8e0ac150 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9f/0xb10 net/core/net_namespace.c:568
3 locks held by kworker/u4:66/18294:
2 locks held by kworker/1:8/22818:
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260
#1: ffffc90013a27da8 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264
1 lock held by syz-executor.5/25022:
#0: ffffffff8c79d578 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline]
#0: ffffffff8c79d578 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x24f/0x780 kernel/rcu/tree_exp.h:946
3 locks held by syz-executor.1/32592:
#0: ffff8880261e00e0 (&type->s_umount_key#76/1){+.+.}-{3:3}, at: alloc_super+0x22e/0xb60 fs/super.c:228
#1: ffff8880b983b598 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:545 [inline]
#1: ffff8880b983b598 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x90/0x120 kernel/sched/core.c:530
#2: ffff8880b99287c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2de/0x930 kernel/sched/psi.c:976
1 lock held by syz-executor.2/32604:
#0: ffff888022aaa0e0 (&type->s_umount_key#106/1){+.+.}-{3:3}, at: alloc_super+0x22e/0xb60 fs/super.c:228
2 locks held by syz-executor.0/32613:
#0: ffffffff8e0bfde8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:75 [inline]
#0: ffffffff8e0bfde8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e9/0xca0 net/core/rtnetlink.c:6138
#1: ffffffff8c79d578 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline]
#1: ffffffff8c79d578 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x24f/0x780 kernel/rcu/tree_exp.h:946
1 lock held by syz-executor.0/32614:
#0: ffffffff8e0bfde8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:75 [inline]
#0: ffffffff8e0bfde8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e9/0xca0 net/core/rtnetlink.c:6138
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.1.0-next-20221219-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x32f/0x3c0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xc75/0xfc0 kernel/hung_task.c:377
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 25022 Comm: syz-executor.5 Not tainted 6.1.0-next-20221219-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:deref_stack_reg arch/x86/kernel/unwind_orc.c:379 [inline]
RIP: 0010:unwind_next_frame+0xa02/0x1d00 arch/x86/kernel/unwind_orc.c:558
Code: 84 c0 0f 84 bd f9 ff ff 4c 8b 5c 24 20 48 89 ee 48 ba 00 00 00 00 00 fc ff df 48 c1 ee 03 4c 89 df e8 42 ef ff ff 80 3c 16 00 <4c> 8b 44 24 28 48 8b 4c 24 30 0f 85 63 0e 00 00 48 8b 54 24 08 49
RSP: 0018:ffffc9001053f3f8 EFLAGS: 00000246
RAX: ffffffff81e5016a RBX: 0000000000000001 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 1ffff920020a7e96 RDI: ffffc9001053fd88
RBP: ffffc9001053f4b0 R08: ffffffff8f050b5c R09: ffffc9001053f49c
R10: fffff520020a7e98 R11: ffffc9001053fd88 R12: ffffc9001053f49d
R13: ffffc9001053f468 R14: ffffc9001053fd90 R15: ffffffff8f050b60
FS: 000055555601e400(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555556ed9848 CR3: 000000005eccc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x81/0xf0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x90/0xc0 kernel/stacktrace.c:122
save_stack+0x151/0x1e0 mm/page_owner.c:127
__reset_page_owner+0x5d/0x180 mm/page_owner.c:148
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1446 [inline]
free_pcp_prepare+0x4d0/0x9e0 mm/page_alloc.c:1496
free_unref_page_prepare mm/page_alloc.c:3369 [inline]
free_unref_page_list+0x176/0xcd0 mm/page_alloc.c:3510
release_pages+0xcb1/0x1330 mm/swap.c:1074
__pagevec_release+0x77/0xe0 mm/swap.c:1094
pagevec_release include/linux/pagevec.h:71 [inline]
folio_batch_release include/linux/pagevec.h:135 [inline]
shmem_undo_range+0x595/0x1340 mm/shmem.c:949
shmem_truncate_range mm/shmem.c:1044 [inline]
shmem_evict_inode+0x32f/0xb60 mm/shmem.c:1159
evict+0x2ed/0x6b0 fs/inode.c:664
iput_final fs/inode.c:1747 [inline]
iput fs/inode.c:1773 [inline]
iput+0x52b/0x8c0 fs/inode.c:1759
dentry_unlink_inode+0x2b1/0x460 fs/dcache.c:401
__dentry_kill+0x3c0/0x640 fs/dcache.c:607
dentry_kill fs/dcache.c:733 [inline]
dput+0x80a/0xdb0 fs/dcache.c:913
__fput+0x3cc/0xa90 fs/file_table.c:328
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: 0033:0x7ff13868d547
Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe2b354a68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007ff13868d547
RDX: 00007ffe2b354b3b RSI: 000000000000000a RDI: 00007ffe2b354b30
RBP: 00007ffe2b354b30 R08: 00000000ffffffff R09: 00007ffe2b354900
R10: 000055555601f8b3 R11: 0000000000000246 R12: 00007ff1386e6b24
R13: 00007ffe2b355bf0 R14: 000055555601f810 R15: 00007ffe2b355c30