INFO: task kworker/u8:7:1170 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:7 state:D stack:21112 pid:1170 tgid:1170 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: netns cleanup_net
Call Trace:
context_switch kernel/sched/core.c:5260 [inline]
__schedule+0x1472/0x4fe0 kernel/sched/core.c:6867
__schedule_loop kernel/sched/core.c:6949 [inline]
schedule+0x164/0x360 kernel/sched/core.c:6964
afs_cell_purge+0x40d/0x580 fs/afs/cell.c:921
afs_net_exit+0x50/0x100 fs/afs/main.c:147
ops_exit_list net/core/net_namespace.c:199 [inline]
ops_undo_list+0x49f/0x940 net/core/net_namespace.c:252
cleanup_net+0x4e5/0x7b0 net/core/net_namespace.c:696
process_one_work kernel/workqueue.c:3257 [inline]
process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340
worker_thread+0xda6/0x1360 kernel/workqueue.c:3421
kthread+0x726/0x8b0 kernel/kthread.c:463
ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Showing all locks held in the system:
4 locks held by pr/legacy/17:
1 lock held by khungtaskd/38:
#0: ffffffff8dbc77c0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8dbc77c0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
#0: ffffffff8dbc77c0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
7 locks held by kworker/u8:2/43:
3 locks held by kworker/u8:7/1170:
#0: ffff88801aad4938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3232 [inline]
#0: ffff88801aad4938 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x9d4/0x17a0 kernel/workqueue.c:3340
#1: ffffc90004d8fbc0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3233 [inline]
#1: ffffc90004d8fbc0 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0xa0f/0x17a0 kernel/workqueue.c:3340
#2: ffffffff8ef2c9a0 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xfe/0x7b0 net/core/net_namespace.c:670
2 locks held by kworker/u8:8/2990:
2 locks held by getty/5554:
#0: ffff88814e0650a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90003e8b2e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x462/0x13c0 drivers/tty/n_tty.c:2211
7 locks held by syz.9.735/10831:
#0: ffff88805f8ca480 (sb_writers#33){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:499
#1: ffff8880626bad00 (&type->i_mutex_dir_key#21/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1072 [inline]
#1: ffff8880626bad00 (&type->i_mutex_dir_key#21/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2873 [inline]
#1: ffff8880626bad00 (&type->i_mutex_dir_key#21/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2884 [inline]
#1: ffff8880626bad00 (&type->i_mutex_dir_key#21/1){+.+.}-{4:4}, at: filename_create+0x200/0x370 fs/namei.c:4888
#2: ffff888062631c40 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline]
#2: ffff888062631c40 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x16f/0x4790 fs/ocfs2/suballoc.c:789
#3: ffff88805ea6d718 (&dquot->dq_lock){+.+.}-{4:4}, at: ocfs2_acquire_dquot+0x293/0xb20 fs/ocfs2/quota_global.c:823
#4: ffff8880626b9c40 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline]
#4: ffff8880626b9c40 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_lock_global_qf+0x1da/0x290 fs/ocfs2/quota_global.c:313
#5: ffff8880626b9890 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_lock_global_qf+0x201/0x290 fs/ocfs2/quota_global.c:314
#6: ffff8880626b9a38 (&oi->ip_io_mutex){+.+.}-{4:4}, at: ocfs2_read_blocks+0x1ed/0x14a0 fs/ocfs2/buffer_head_io.c:233
1 lock held by syz.9.735/10857:
#0: ffff8880626bad00 (&type->i_mutex_dir_key#25){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:1042 [inline]
#0: ffff8880626bad00 (&type->i_mutex_dir_key#25){++++}-{4:4}, at: lookup_slow+0x46/0x70 fs/namei.c:1882
1 lock held by syz.9.735/10858:
#0: ffff8880626bad00 (&type->i_mutex_dir_key#25){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:1042 [inline]
#0: ffff8880626bad00 (&type->i_mutex_dir_key#25){++++}-{4:4}, at: lookup_slow+0x46/0x70 fs/namei.c:1882
1 lock held by syz.9.735/10859:
#0: ffff8880626bad00 (&type->i_mutex_dir_key#25){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:1042 [inline]
#0: ffff8880626bad00 (&type->i_mutex_dir_key#25){++++}-{4:4}, at: lookup_slow+0x46/0x70 fs/namei.c:1882
1 lock held by syz.6.742/10856:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 38 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:161 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x135/0x170 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline]
watchdog+0xf90/0xfe0 kernel/hung_task.c:515
kthread+0x726/0x8b0 kernel/kthread.c:463
ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 43 Comm: kworker/u8:2 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
Workqueue: wg-kex-wg0 wg_packet_handshake_send_worker
RIP: 0010:__bfs kernel/locking/lockdep.c:1815 [inline]
RIP: 0010:__bfs_backwards kernel/locking/lockdep.c:1860 [inline]
RIP: 0010:check_irq_usage kernel/locking/lockdep.c:2796 [inline]
RIP: 0010:check_prev_add kernel/locking/lockdep.c:3169 [inline]
RIP: 0010:check_prevs_add kernel/locking/lockdep.c:3284 [inline]
RIP: 0010:validate_chain kernel/locking/lockdep.c:3908 [inline]
RIP: 0010:__lock_acquire+0x197b/0x2cf0 kernel/locking/lockdep.c:5237
Code: 13 25 ff 0f 00 00 39 05 4f 3b 8e 11 73 06 89 05 47 3b 8e 11 48 8b 02 48 89 df 4c 39 e8 0f 84 2c fe ff ff 4c 89 60 30 48 8b 00 <4c> 39 e8 75 f4 48 89 df e9 18 fe ff ff 48 89 fb 48 c7 c7 10 4a a9
RSP: 0018:ffffc90000b56f98 EFLAGS: 00000002
RAX: ffffffff95d265d8 RBX: 00000000000003cd RCX: 00000000000002ea
RDX: ffffffff95b2aba8 RSI: ffff88814129ab10 RDI: 00000000000003cd
RBP: 12140f43c0a6b0ee R08: ffffc90000b56f60 R09: 0000000000000020
R10: ffffc90000b57250 R11: ffffffff819f4dd0 R12: ffffffff95e39948
R13: ffffffff92cfb4e8 R14: ffff888141299e40 R15: 00000000000002e9
FS: 0000000000000000(0000) GS:ffff8881265c9000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110f24fd8a CR3: 000000005a126000 CR4: 00000000003526f0
Call Trace:
lock_acquire+0x106/0x330 kernel/locking/lockdep.c:5868
_raw_spin_lock_nested+0x32/0x50 kernel/locking/spinlock.c:378
raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:639
raw_spin_rq_lock kernel/sched/sched.h:1580 [inline]
__task_rq_lock+0xc1/0x460 kernel/sched/core.c:715
ttwu_runnable kernel/sched/core.c:3690 [inline]
try_to_wake_up+0x101/0x1380 kernel/sched/core.c:4136
autoremove_wake_function kernel/sched/wait.c:403 [inline]
wake_bit_function+0xe5/0x210 kernel/sched/wait_bit.c:34
__wake_up_common kernel/sched/wait.c:108 [inline]
__wake_up_common_lock+0x136/0x1e0 kernel/sched/wait.c:125
__wake_up kernel/sched/wait.c:146 [inline]
__wake_up_bit kernel/sched/wait_bit.c:129 [inline]
wake_up_bit+0xfb/0x150 kernel/sched/wait_bit.c:160
end_bio_bh_io_sync+0xbd/0x120 fs/buffer.c:2776
blk_update_request+0x57e/0xe60 block/blk-mq.c:1007
blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1169
blk_complete_reqs block/blk-mq.c:1244 [inline]
blk_done_softirq+0x10a/0x160 block/blk-mq.c:1249
handle_softirqs+0x1de/0x640 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
__local_bh_enable_ip+0x170/0x2b0 kernel/softirq.c:302
local_bh_enable include/linux/bottom_half.h:33 [inline]
spin_unlock_bh include/linux/spinlock_rt.h:111 [inline]
wg_index_hashtable_insert+0x12e/0x8c0 drivers/net/wireguard/peerlookup.c:126
wg_noise_handshake_create_initiation+0x64e/0x830 drivers/net/wireguard/noise.c:569
wg_packet_send_handshake_initiation drivers/net/wireguard/send.c:34 [inline]
wg_packet_handshake_send_worker+0x18d/0x350 drivers/net/wireguard/send.c:51
process_one_work kernel/workqueue.c:3257 [inline]
process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340
worker_thread+0xda6/0x1360 kernel/workqueue.c:3421
kthread+0x726/0x8b0 kernel/kthread.c:463
ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246