INFO: task kworker/u4:8:6066 blocked for more than 143 seconds.
Not tainted 5.19.0-rc4-next-20220628-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:8 state:D
stack:26528 pid: 6066 ppid: 2 flags:0x00004000
Workqueue: writeback wb_workfn
(flush-7:1)
Call Trace:
context_switch kernel/sched/core.c:5184 [inline]
__schedule+0xa09/0x4f10 kernel/sched/core.c:6496
schedule+0xd2/0x1f0 kernel/sched/core.c:6568
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x378/0x530 kernel/sched/completion.c:106
f2fs_issue_checkpoint+0x363/0x460 fs/f2fs/checkpoint.c:1865
f2fs_sync_fs+0x2f9/0x420 fs/f2fs/super.c:1653
f2fs_balance_fs_bg+0xc6a/0xef0 fs/f2fs/segment.c:477
f2fs_write_node_pages+0x148/0xc40 fs/f2fs/node.c:2100
do_writepages+0x1ab/0x690 mm/page-writeback.c:2468
__writeback_single_inode+0x121/0x10b0 fs/fs-writeback.c:1588
writeback_sb_inodes+0x54d/0xf10 fs/fs-writeback.c:1866
__writeback_inodes_wb+0xc6/0x280 fs/fs-writeback.c:1937
wb_writeback+0x7e9/0xc20 fs/fs-writeback.c:2042
wb_check_old_data_flush fs/fs-writeback.c:2142 [inline]
wb_do_writeback fs/fs-writeback.c:2195 [inline]
wb_workfn+0x845/0x1230 fs/fs-writeback.c:2223
process_one_work+0x991/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0:
ffffffff8bd864f0
(
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:
ffffffff8bd861f0
(
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:
ffffffff8bd87040
(
rcu_read_lock
){....}-{1:2}
, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6491
2 locks held by getty/3280:
#0:
ffff8880260d5098
(
&tty->ldisc_sem
){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1:
ffffc90002d162f0
(
&ldata->atomic_read_lock
){+.+.}-{3:3}
, at: n_tty_read+0xe50/0x13c0 drivers/tty/n_tty.c:2177
2 locks held by kworker/0:5/3682:
#0: ffff888011866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888011866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888011866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888011866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888011866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888011866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc90003cafda8 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
5 locks held by kworker/u4:7/3719:
3 locks held by kworker/u4:8/6066:
#0: ffff888016eac938 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888016eac938 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888016eac938 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888016eac938 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888016eac938 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888016eac938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc9000478fda8 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2:
ffff88803ab620e0
(
&type->s_umount_key
#67
){++++}-{3:3}
, at: trylock_super+0x1d/0x100 fs/super.c:415
4 locks held by kworker/u4:13/8865:
#0:
ffff8880119bd938
(
(wq_completion)netns
){+.+.}-{0:0}
, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
, at: set_work_data kernel/workqueue.c:636 [inline]
, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc9000a887da8
(
net_cleanup_work
){+.+.}-{0:0}
, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2:
ffffffff8d58ea10
(
pernet_ops_rwsem
){++++}-{3:3}
, at: cleanup_net+0x9b/0xb00 net/core/net_namespace.c:557
#3:
ffffffff8bd91800
(
rcu_state.barrier_mutex
){+.+.}-{3:3}
, at: rcu_barrier+0x44/0x630 kernel/rcu/tree.c:3783
5 locks held by f2fs_ckpt-7:1/8882:
3 locks held by syz-executor.3/11963:
#0:
ffffffff8d58ea10
(
pernet_ops_rwsem
){++++}-{3:3}
, at: copy_net_ns+0x2f5/0x760 net/core/net_namespace.c:468
#1: ffffffff8d5a31a8
(
rtnl_mutex
){+.+.}-{3:3}
, at: ip_tunnel_delete_nets+0x8e/0x5b0 net/ipv4/ip_tunnel.c:1119
#2:
ffffffff8bd91938
(
rcu_state.exp_mutex
){+.+.}-{3:3}
, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
, at: synchronize_rcu_expedited+0x562/0x670 kernel/rcu/tree_exp.h:940
2 locks held by syz-executor.5/11966:
#0:
ffffffff8d58ea10
(
pernet_ops_rwsem
){++++}-{3:3}
, at: copy_net_ns+0x2f5/0x760 net/core/net_namespace.c:468
#1:
ffffffff8d5a31a8
(
rtnl_mutex
){+.+.}-{3:3}
, at: ip_tunnel_delete_nets+0x8e/0x5b0 net/ipv4/ip_tunnel.c:1119
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 5.19.0-rc4-next-20220628-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xc18/0xf50 kernel/hung_task.c:369
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 1085 Comm: kworker/u4:5 Not tainted 5.19.0-rc4-next-20220628-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__sanitizer_cov_trace_pc+0x5c/0x60 kernel/kcov.c:218
Code: 82 70 15 00 00 83 f8 02 75 20 48 8b 8a 78 15 00 00 8b 92 74 15 00 00 48 8b 01 48 83 c0 01 48 39 c2 76 07 48 89 01 48 89 34 c1 0f 1f 00 41 55 41 54 49 89 fc 55 48 bd eb 83 b5 80 46 86 c8 61
RSP: 0018:ffffc900047efc80 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff888037a000f8 RCX: 0000000000000000
RDX: ffff88801f0f57c0 RSI: ffffffff8913017d RDI: ffff88801f0f5bfc
RBP: 0000000000000001 R08: 0000000000000004 R09: 000000000000001f
R10: 0000000000000400 R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000000 R14: dffffc0000000000 R15: 000000000000001f
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555557361848 CR3: 000000000ba8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_lock_acquire include/linux/rcupdate.h:280 [inline]
rcu_read_lock include/linux/rcupdate.h:706 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0x10d/0xfa0 net/batman-adv/network-coding.c:719
process_one_work+0x991/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302