INFO: task syz-executor.2:8656 blocked for more than 143 seconds.
Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:24632 pid:8656 tgid:8656 ppid:5089 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x17d3/0x4a20 kernel/sched/core.c:6736
__schedule_loop kernel/sched/core.c:6813 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6828
schedule_timeout+0xb0/0x310 kernel/time/timer.c:2548
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion+0x355/0x620 kernel/sched/completion.c:148
__flush_work+0xa7b/0xc90 kernel/workqueue.c:4205
__cancel_work_sync+0x330/0x6d0 kernel/workqueue.c:4304
uhid_dev_destroy drivers/hid/uhid.c:584 [inline]
uhid_char_release+0xaf/0x600 drivers/hid/uhid.c:662
__fput+0x42b/0x8a0 fs/file_table.c:422
__do_sys_close fs/open.c:1556 [inline]
__se_sys_close fs/open.c:1541 [inline]
__x64_sys_close+0x7f/0x110 fs/open.c:1541
do_syscall_64+0xfd/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f63c347cc9a
RSP: 002b:00007ffc14d3e2d0 EFLAGS: 00000293
ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00007f63c347cc9a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 0000000000000032 R08: 0000001b31720000 R09: 0000000000000001
R10: 000000008136099b R11: 0000000000000293 R12: 00007f63c3013808
R13: ffffffffffffffff R14: 00007f63c3000000 R15: 00000000000363a2
Showing all locks held in the system:
3 locks held by kworker/0:0/7:
3 locks held by kworker/u8:0/10:
#0:
ffff888029b7e148
(
(wq_completion)ipv6_addrconf
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3229 [inline]
, at: process_scheduled_works+0x8e0/0x1770 kernel/workqueue.c:3335
#1:
ffffc900000f7d00
(
(work_completion)(&(&ifa->dad_work)->work)
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3230 [inline]
, at: process_scheduled_works+0x91b/0x1770 kernel/workqueue.c:3335
#2:
ffffffff8f38da88
(
rtnl_mutex
){+.+.}-{3:3}
, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4191
3 locks held by kworker/1:0/24:
1 lock held by khungtaskd/29:
#0:
ffffffff8e132020
(
rcu_read_lock
){....}-{1:2}
, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
6 locks held by kworker/u8:3/50:
#0:
ffff888015acd948
(
(wq_completion)netns
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3229 [inline]
, at: process_scheduled_works+0x8e0/0x1770 kernel/workqueue.c:3335
#1:
ffffc90000ba7d00
(
net_cleanup_work
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3230 [inline]
, at: process_scheduled_works+0x91b/0x1770 kernel/workqueue.c:3335
#2:
ffffffff8f381410
(
pernet_ops_rwsem
){++++}-{3:3}
, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:591
#3: ffffffff8f38da88 (rtnl_mutex){+.+.}-{3:3}, at: default_device_exit_batch+0xe9/0x9f0 net/core/dev.c:11617
#4: ffff88807c158d20 (team->team_lock_key#7){+.+.}-{3:3}, at: team_del_slave+0x32/0x1d0 drivers/net/team/team.c:1988
#5: ffffffff8e1373b8 (
rcu_state.exp_mutex
){+.+.}-{3:3}
, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
, at: synchronize_rcu_expedited+0x39a/0x820 kernel/rcu/tree_exp.h:939
3 locks held by kworker/0:2/925:
2 locks held by kworker/u8:6/1096:
2 locks held by getty/4824:
#0: ffff88802f5b80a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
3 locks held by kworker/u9:5/5096:
#0: ffff88807fee9948 ((wq_completion)hci9){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline]
#0: ffff88807fee9948 ((wq_completion)hci9){+.+.}-{0:0}, at: process_scheduled_works+0x8e0/0x1770 kernel/workqueue.c:3335
#1: ffffc90004507d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3230 [inline]
#1: ffffc90004507d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x91b/0x1770 kernel/workqueue.c:3335
#2: ffff88805b2dd060 (&hdev->req_lock){+.+.}-{3:3}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:309
3 locks held by kworker/0:3/5103:
#0: ffff888014c74948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline]
#0: ffff888014c74948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x8e0/0x1770 kernel/workqueue.c:3335
#1: ffffc90004577d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3230 [inline]
#1: ffffc90004577d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x91b/0x1770 kernel/workqueue.c:3335
#2: ffffffff8f38da88 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276
9 locks held by kworker/0:4/5139:
3 locks held by kworker/1:4/5149:
3 locks held by kworker/1:8/5185:
3 locks held by kworker/0:8/5193:
1 lock held by syz-executor.2/8938:
#0: ffffffff8f38da88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f38da88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6592
1 lock held by syz-executor.0/8943:
#0: ffffffff8f38da88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f38da88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6592
1 lock held by syz-executor.4/8973:
#0: ffffffff8f38da88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f38da88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6592
1 lock held by syz-executor.1/8978:
#0: ffffffff8f38da88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f38da88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6592
2 locks held by syz-executor.3/8983:
#0: ffffffff8f381410 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c8/0x7b0 net/core/net_namespace.c:501
#1: ffffffff8f38da88 (rtnl_mutex){+.+.}-{3:3}, at: ip_tunnel_init_net+0x213/0x710 net/ipv4/ip_tunnel.c:1116
1 lock held by syz-executor.5/8994:
#0: ffffffff8f38da88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f38da88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6592
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xfb0/0xff0 kernel/hung_task.c:379
kthread+0x2f2/0x390 kernel/kthread.c:388
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 50 Comm: kworker/u8:3 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Workqueue: netns cleanup_net
RIP: 0010:strlen+0x43/0x70 lib/string.c:402
Code: 00 00 00 fc ff df 48 89 fb 49 89 c4 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 12 48 ff c3 49 8d 44 24 01 43 80 7c 26 01 00 <75> dd eb 13 89 d9 80 e1 07 38 c1 7c e5 48 89 df e8 68 09 8b f6 eb
RSP: 0018:ffffc90000ba74d8 EFLAGS: 00000206
RAX: 0000000000000000 RBX: ffffffff8ca1a241 RCX: ffff88801cef1e01
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff8ca1a240
RBP: 0000000000000001 R08: ffffffff8234369d R09: 1ffff11002b59d1c
R10: dffffc0000000000 R11: ffffed1002b59d1d R12: ffffffffffffffff
R13: 0000000000000000 R14: ffffffff8ca1a240 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c001031010 CR3: 000000000df32000 CR4: 0000000000350ef0
Call Trace:
kernfs_name_hash fs/kernfs/dir.c:315 [inline]
kernfs_find_ns+0x12c/0x550 fs/kernfs/dir.c:844
kernfs_remove_by_name_ns+0x88/0x160 fs/kernfs/dir.c:1682
kernfs_remove_by_name include/linux/kernfs.h:623 [inline]
remove_files fs/sysfs/group.c:28 [inline]
sysfs_remove_group+0xfe/0x2b0 fs/sysfs/group.c:292
sysfs_remove_groups+0x54/0xb0 fs/sysfs/group.c:316