INFO: task kworker/0:0:9 blocked for more than 149 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:0 state:D stack:0 pid:9 tgid:9 ppid:2 task_flags:0x4208060 flags:0x00000010
Workqueue: events update_super_work
Call trace:
__switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T)
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x13b0/0x2864 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0xb4/0x230 kernel/sched/core.c:7026
io_schedule+0x84/0xf0 kernel/sched/core.c:7871
bit_wait_io+0x1c/0xac kernel/sched/wait_bit.c:250
__wait_on_bit kernel/sched/wait_bit.c:52 [inline]
out_of_line_wait_on_bit+0x158/0x1f0 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
__wait_on_buffer+0x6c/0x7c fs/buffer.c:123
wait_on_buffer include/linux/buffer_head.h:420 [inline]
ext4_commit_super+0x300/0x4e4 fs/ext4/super.c:6236
update_super_work+0x2dc/0x394 fs/ext4/super.c:799
process_one_work+0x7e8/0x155c kernel/workqueue.c:3263
process_scheduled_works kernel/workqueue.c:3346 [inline]
worker_thread+0x958/0xed8 kernel/workqueue.c:3427
kthread+0x5fc/0x75c kernel/kthread.c:463
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844
INFO: task kworker/R-ipv6_:4234 blocked for more than 149 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/R-ipv6_ state:D stack:0 pid:4234 tgid:4234 ppid:2 task_flags:0x4208060 flags:0x00000010
Workqueue: ipv6_addrconf addrconf_dad_work
Call trace:
__switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T)
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x13b0/0x2864 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0xb4/0x230 kernel/sched/core.c:7026
schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7083
__mutex_lock_common+0xd04/0x2678 kernel/locking/mutex.c:676
__mutex_lock kernel/locking/mutex.c:760 [inline]
mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:812
rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80
rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
addrconf_dad_work+0x100/0x10cc net/ipv6/addrconf.c:4194
process_one_work+0x7e8/0x155c kernel/workqueue.c:3263
process_scheduled_works kernel/workqueue.c:3346 [inline]
rescuer_thread+0x504/0xec8 kernel/workqueue.c:3523
kthread+0x5fc/0x75c kernel/kthread.c:463
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844
Showing all locks held in the system:
1 lock held by kthreadd/2:
2 locks held by kworker/0:0/9:
#0: ffff0000c0029948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3237
#1: ffff800097a47be0 ((work_completion)(&sbi->s_sb_upd_work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3237
2 locks held by kworker/0:1/11:
3 locks held by kworker/u8:0/12:
3 locks held by kworker/u8:1/15:
3 locks held by kworker/1:0/24:
#0: ffff0000c0029948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3237
#1: ffff800097b47be0 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3237
#2: ffff800092877b28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80
1 lock held by khungtaskd/32:
#0: ffff80008f78b760 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330
10 locks held by kworker/R-write/34:
3 locks held by kworker/u8:2/41:
3 locks held by kworker/u8:3/42:
1 lock held by pr/ttyAMA-1/43:
5 locks held by kworker/u9:0/53:
#0: ffff0000cb544148 ((wq_completion)hci0){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3237
#1: ffff8000991e7be0 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3237
#2: ffff0000cb634dc8 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x184/0x33c net/bluetooth/hci_sync.c:331
#3: ffff0000cb6340b8 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1d4/0xbb8 net/bluetooth/hci_sync.c:5684
#4: ffff800092be4248 (uevent_sock_mutex){+.+.}-{4:4}, at: uevent_net_broadcast_untagged lib/kobject_uevent.c:317 [inline]
#4: ffff800092be4248 (uevent_sock_mutex){+.+.}-{4:4}, at: kobject_uevent_net_broadcast+0x24c/0x548 lib/kobject_uevent.c:410
3 locks held by kworker/u8:4/519:
3 locks held by kworker/u8:5/800:
2 locks held by kworker/0:2/1857:
3 locks held by kworker/u8:6/2110:
3 locks held by kworker/R-ipv6_/4234:
#0: ffff0000d2d11948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3237
#1: ffff8000a2627bc0 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3237
#2: ffff800092877b28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80
2 locks held by kworker/R-bat_e/4310:
3 locks held by kworker/u8:7/5178:
1 lock held by klogd/6180:
1 lock held by udevd/6191:
1 lock held by dhcpcd/6245:
3 locks held by dhcpcd/6246:
2 locks held by crond/6320:
2 locks held by getty/6335:
#0: ffff0000d34a90a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
#1: ffff80009bb3b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa4 drivers/tty/n_tty.c:2222
1 lock held by syz-executor/6535:
2 locks held by udevd/6541:
2 locks held by syz-executor/6550:
1 lock held by syz-executor/6556:
#0: ffff800092877b28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80
1 lock held by syz-executor/6557:
#0: ffff800092877b28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
#0: ffff800092877b28 (rtnl_mutex){+.+.}-{4:4}, at: rtnetlink_rcv_msg+0x5dc/0x97c net/core/rtnetlink.c:6957
2 locks held by kworker/0:4/6655:
2 locks held by kworker/1:7/6664:
1 lock held by syz.0.1/6674:
#0: ffff0000d101a0e0 (&type->s_umount_key#51){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff0000d101a0e0 (&type->s_umount_key#51){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff0000d101a0e0 (&type->s_umount_key#51){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:505
1 lock held by udevd/6675:
#0: ffff0000c1466f38 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:995 [inline]
#0: ffff0000c1466f38 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_read_iter+0x2a0/0x3dc block/fops.c:858
2 locks held by udevadm/6688:
4 locks held by syz.3.4/6699:
#0: ffff8000928dd0d0 (cb_lock){++++}-{4:4}, at: genl_rcv+0x28/0x50 net/netlink/genetlink.c:1218
#1: ffff8000928dcee8 (genl_mutex){+.+.}-{4:4}, at: genl_lock net/netlink/genetlink.c:35 [inline]
#1: ffff8000928dcee8 (genl_mutex){+.+.}-{4:4}, at: genl_op_lock net/netlink/genetlink.c:60 [inline]
#1: ffff8000928dcee8 (genl_mutex){+.+.}-{4:4}, at: genl_rcv_msg+0xf4/0x624 net/netlink/genetlink.c:1209
#2: ffff800092877b28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80
#3: ffff0000c8821528 (&wg->device_update_lock){+.+.}-{4:4}, at: wg_set_device+0x158/0x19d0 drivers/net/wireguard/netlink.c:515
3 locks held by ext4lazyinit/6709:
#0: ffff0000d60800e0 (&type->s_umount_key#30){++++}-{4:4}, at: ext4_lazyinit_thread+0x184/0x1744 fs/ext4/super.c:3815
#1: ffff0000d6080420 (sb_writers#3){.+.+}-{0:0}, at: kthread+0x5fc/0x75c kernel/kthread.c:463
#2: ffff0000c173d0a8 (&meta_group_info[i]->alloc_sem){++++}-{4:4}, at: ext4_init_inode_table+0x180/0x780 fs/ext4/ialloc.c:1541
2 locks held by kworker/0:6/6718:
3 locks held by kworker/u8:8/6719:
2 locks held by kworker/u8:9/6720:
3 locks held by kworker/u8:10/6722:
1 lock held by kworker/u8:11/6724:
=============================================