INFO: task kworker/u4:0:12638 blocked for more than 144 seconds.
Not tainted 6.4.0-rc1-next-20230511-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:0 state:D stack:23872 pid:12638 ppid:2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-7:0)
Call Trace:
context_switch kernel/sched/core.c:5343 [inline]
__schedule+0x1d15/0x5790 kernel/sched/core.c:6669
schedule+0xde/0x1a0 kernel/sched/core.c:6745
io_schedule+0xbe/0x130 kernel/sched/core.c:8987
folio_wait_bit_common+0x394/0x9b0 mm/filemap.c:1304
folio_lock include/linux/pagemap.h:955 [inline]
write_cache_pages+0x5b7/0xd30 mm/page-writeback.c:2440
mpage_writepages+0xc6/0x170 fs/mpage.c:679
do_writepages+0x1a8/0x640 mm/page-writeback.c:2551
__writeback_single_inode+0x121/0xdb0 fs/fs-writeback.c:1603
writeback_sb_inodes+0x54d/0xe70 fs/fs-writeback.c:1894
__writeback_inodes_wb+0xc6/0x280 fs/fs-writeback.c:1965
wb_writeback+0x4d5/0xa40 fs/fs-writeback.c:2072
wb_check_old_data_flush fs/fs-writeback.c:2176 [inline]
wb_do_writeback fs/fs-writeback.c:2229 [inline]
wb_workfn+0x706/0xcc0 fs/fs-writeback.c:2257
process_one_work+0x99a/0x15e0 kernel/workqueue.c:2407
worker_thread+0x67d/0x10c0 kernel/workqueue.c:2554
kthread+0x344/0x440 kernel/kthread.c:379
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/13:
#0: ffffffff8c7985b0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:522
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8c7982b0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:522
1 lock held by khungtaskd/28:
#0: ffffffff8c7991c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x390 kernel/locking/lockdep.c:6559
4 locks held by kworker/u4:3/46:
#0: ffff888014267938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888014267938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888014267938 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline]
#0: ffff888014267938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline]
#0: ffff888014267938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline]
#0: ffff888014267938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2378
#1: ffffc90000b77db0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2382
#2: ffffffff8e108a10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9f/0xb10 net/core/net_namespace.c:576
#3: ffffffff8e11c3e8 (rtnl_mutex){+.+.}-{3:3}, at: ip_tunnel_delete_nets+0x94/0x3a0 net/ipv4/ip_tunnel.c:1139
2 locks held by getty/4764:
#0: ffff888028853098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900015802f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2176
3 locks held by kworker/1:7/5097:
2 locks held by kworker/u4:19/6709:
3 locks held by kworker/u4:0/12638:
#0: ffff888012ae5938 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888012ae5938 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888012ae5938 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline]
#0: ffff888012ae5938 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline]
#0: ffff888012ae5938 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline]
#0: ffff888012ae5938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2378
#1: ffffc900034a7db0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2382
#2: ffff8880889460e0 (&type->s_umount_key#66){++++}-{3:3}, at: trylock_super+0x21/0x110 fs/super.c:414
3 locks held by kworker/0:23/23574:
#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:1324 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2378
#1: ffffc9000561fdb0 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: psi_task_switch+0x2de/0x950 kernel/sched/psi.c:996
#2: ffff888076430ee0 (&r->consumer_lock#2){+.+.}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:355 [inline]
#2: ffff888076430ee0 (&r->consumer_lock#2){+.+.}-{2:2}, at: ptr_ring_consume_bh include/linux/ptr_ring.h:365 [inline]
#2: ffff888076430ee0 (&r->consumer_lock#2){+.+.}-{2:2}, at: wg_packet_decrypt_worker+0x305/0x5c0 drivers/net/wireguard/receive.c:499
3 locks held by syz-executor.0/25225:
2 locks held by syz-executor.2/26184:
#0: ffffffff8e108a10 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4cb/0x8e0 net/core/net_namespace.c:487
#1: ffffffff8e11c3e8 (rtnl_mutex){+.+.}-{3:3}, at: cangw_pernet_exit_batch+0x15/0xa0 net/can/gw.c:1257
2 locks held by syz-executor.0/26181:
#0: ffffffff8e108a10 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4cb/0x8e0 net/core/net_namespace.c:487
#1: ffffffff8c7a4480 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x6a0 kernel/rcu/tree.c:3997
3 locks held by syz-executor.1/26214:
#0: ffffffff8e108a10 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4cb/0x8e0 net/core/net_namespace.c:487
#1: ffffffff8e11c3e8 (rtnl_mutex){+.+.}-{3:3}, at: ip_tunnel_delete_nets+0x94/0x3a0 net/ipv4/ip_tunnel.c:1139
#2: ffffffff8c7a45b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
#2: ffffffff8c7a45b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x64a/0x770 kernel/rcu/tree_exp.h:992
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.4.0-rc1-next-20230511-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
nmi_cpu_backtrace+0x29c/0x350 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x2a4/0x300 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+0xe16/0x1090 kernel/hung_task.c:379
kthread+0x344/0x440 kernel/kthread.c:379
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: 5382 Comm: kworker/u4:14 Not tainted 6.4.0-rc1-next-20230511-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Workqueue: bat_events batadv_nc_worker
RIP: 0010:lock_release+0x1b/0x670 kernel/locking/lockdep.c:5713
Code: c7 ac 26 7b 8e e8 b5 54 71 00 e9 f0 fd ff ff f3 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 41 57 41 56 41 55 41 54 49 89 fc 55 53 <48> 81 ec 90 00 00 00 48 8d 6c 24 10 48 89 74 24 08 48 c7 44 24 10
RSP: 0018:ffffc9000545fbd8 EFLAGS: 00000293
RAX: dffffc0000000000 RBX: ffff8880208eda00 RCX: 0000000000000000
RDX: ffff8880508f0000 RSI: ffffffff89db75bc RDI: ffff8880208eda18
RBP: ffff8880208eda00 R08: 0000000000000001 R09: 0000000000000003
R10: fffff52000a8bf76 R11: 0000000000000000 R12: ffff8880208eda18
R13: ffff88807aef8c80 R14: dffffc0000000000 R15: ffffffff89db77b0
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005600000d8050 CR3: 000000000c571000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_unlock_bh include/linux/spinlock_api_smp.h:165 [inline]
_raw_spin_unlock_bh+0x16/0x30 kernel/locking/spinlock.c:210
spin_unlock_bh include/linux/spinlock.h:395 [inline]
batadv_nc_purge_paths+0x1cc/0x3c0 net/batman-adv/network-coding.c:471
batadv_nc_worker+0x931/0xfe0 net/batman-adv/network-coding.c:722
process_one_work+0x99a/0x15e0 kernel/workqueue.c:2407
worker_thread+0x67d/0x10c0 kernel/workqueue.c:2554
kthread+0x344/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308