INFO: task kworker/0:1:13 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:1 state:D stack:24400 pid: 13 ppid: 2 flags:0x00004000
Workqueue: events iterate_cleanup_work
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11c3/0x4350 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6537
__mutex_lock_common+0xdf5/0x2400 kernel/locking/mutex.c:669
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
nf_ct_iterate_cleanup+0x47/0x3c0 net/netfilter/nf_conntrack_core.c:2394
nf_ct_iterate_cleanup_net+0x11d/0x190 net/netfilter/nf_conntrack_core.c:2479
iterate_cleanup_work+0x66/0x120 net/netfilter/nf_nat_masquerade.c:83
process_one_work+0x867/0xff0 kernel/workqueue.c:2310
worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457
kthread+0x42e/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
</TASK>
INFO: task kworker/0:6:4234 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:6 state:D stack:25552 pid: 4234 ppid: 2 flags:0x00004000
Workqueue: events iterate_cleanup_work
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11c3/0x4350 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6537
__mutex_lock_common+0xdf5/0x2400 kernel/locking/mutex.c:669
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
nf_ct_iterate_cleanup+0x47/0x3c0 net/netfilter/nf_conntrack_core.c:2394
nf_ct_iterate_cleanup_net+0x11d/0x190 net/netfilter/nf_conntrack_core.c:2479
iterate_cleanup_work+0x66/0x120 net/netfilter/nf_nat_masquerade.c:83
process_one_work+0x867/0xff0 kernel/workqueue.c:2310
worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457
kthread+0x42e/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
</TASK>
Showing all locks held in the system:
3 locks held by kworker/0:1/13:
#0: ffff888016c70938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1
#1: ffffc90000d27d00 ((work_completion)(&w->work)#2){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285
#2: ffffffff8d4b23a8 (nf_conntrack_mutex){+.+.}-{3:3}, at: nf_ct_iterate_cleanup+0x47/0x3c0 net/netfilter/nf_conntrack_core.c:2394
1 lock held by khungtaskd/27:
#0: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
4 locks held by kworker/u5:0/146:
#0: ffff88807b865138 ((wq_completion)hci12#2){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1
#1: ffffc900015cfd00 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285
#2: ffff88807d288478 (&hdev->lock){+.+.}-{3:3}, at: hci_remote_features_evt+0xbb/0xa10 net/bluetooth/hci_event.c:3334
#3: ffffffff8d593488 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1504 [inline]
#3: ffffffff8d593488 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_remote_features_evt+0x5d9/0xa10 net/bluetooth/hci_event.c:3367
4 locks held by kworker/u4:2/154:
#0: ffff888016dcd938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1
#1: ffffc90001ec7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285
#2: ffffffff8d4410d0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x148/0xba0 net/core/net_namespace.c:589
#3: ffffffff8d4b23a8 (nf_conntrack_mutex){+.+.}-{3:3}, at: nf_ct_iterate_cleanup+0x47/0x3c0 net/netfilter/nf_conntrack_core.c:2394
3 locks held by kworker/0:2/1108:
#0: ffff888016c71938 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1
#1: ffffc90004717d00 ((crda_timeout).work){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285
#2: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: crda_timeout_work+0x11/0x50 net/wireless/reg.c:538
2 locks held by getty/3944:
#0: ffff88814c7e7098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc90002cf62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x594/0x1a50 drivers/tty/n_tty.c:2158
4 locks held by kworker/u5:1/4189:
#0: ffff888023556138 ((wq_completion)hci16#2){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1
#1: ffffc90002e2fd00 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285
#2: ffff88806a540478 (&hdev->lock){+.+.}-{3:3}, at: hci_remote_features_evt+0xbb/0xa10 net/bluetooth/hci_event.c:3334
#3: ffffffff8d593488 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1504 [inline]
#3: ffffffff8d593488 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_remote_features_evt+0x5d9/0xa10 net/bluetooth/hci_event.c:3367
4 locks held by kworker/u5:2/4193:
#0: ffff888023c5f138 ((wq_completion)hci15#2){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1
#1: ffffc90002e7fd00 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285
#2: ffff888184f04478 (&hdev->lock){+.+.}-{3:3}, at: hci_remote_features_evt+0xbb/0xa10 net/bluetooth/hci_event.c:3334
#3: ffffffff8d593488 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1504 [inline]
#3: ffffffff8d593488 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_remote_features_evt+0x5d9/0xa10 net/bluetooth/hci_event.c:3367
3 locks held by kworker/0:4/4195:
4 locks held by kworker/u5:4/4200:
#0: ffff88814c254138 ((wq_completion)hci13#2){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1
#1: ffffc90002edfd00 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285
#2: ffff888184efc478 (&hdev->lock){+.+.}-{3:3}, at: hci_remote_features_evt+0xbb/0xa10 net/bluetooth/hci_event.c:3334
#3: ffffffff8d593488 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1504 [inline]
#3: ffffffff8d593488 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_remote_features_evt+0x5d9/0xa10 net/bluetooth/hci_event.c:3367
4 locks held by kworker/u5:5/4201:
#0: ffff88807b354938 ((wq_completion)hci11#2){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1
#1: ffffc90002eefd00 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285
#2: ffff88807ba00478 (&hdev->lock){+.+.}-{3:3}, at: hci_remote_features_evt+0xbb/0xa10 net/bluetooth/hci_event.c:3334
#3: ffffffff8d593488 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1504 [inline]
#3: ffffffff8d593488 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_remote_features_evt+0x5d9/0xa10 net/bluetooth/hci_event.c:3367
4 locks held by kworker/u5:6/4202:
#0: ffff8880253d5938 ((wq_completion)hci17#2){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1
#1: ffffc90002f1fd00 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285
#2: ffff88818b368478 (&hdev->lock){+.+.}-{3:3}, at: hci_remote_features_evt+0xbb/0xa10 net/bluetooth/hci_event.c:3334
#3: ffffffff8d593488 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1504 [inline]
#3: ffffffff8d593488 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_remote_features_evt+0x5d9/0xa10 net/bluetooth/hci_event.c:3367
4 locks held by kworker/u5:7/4203:
#0: ffff8880214bf138 ((wq_completion)hci14#2){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1
#1: ffffc90002f2fd00 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285
#2: ffff888184f00478 (&hdev->lock){+.+.}-{3:3}, at: hci_remote_features_evt+0xbb/0xa10 net/bluetooth/hci_event.c:3334
#3: ffffffff8d593488 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1504 [inline]
#3: ffffffff8d593488 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_remote_features_evt+0x5d9/0xa10 net/bluetooth/hci_event.c:3367
4 locks held by kworker/u5:8/4204:
#0: ffff88807b354138 ((wq_completion)hci11){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1
#1: ffffc90002f3fd00 ((work_completion)(&hdev->scan_update)){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285
#2: ffff88807ba013f0 (&hdev->req_lock){+.+.}-{3:3}, at: hci_req_sync net/bluetooth/hci_request.c:278 [inline]
#2: ffff88807ba013f0 (&hdev->req_lock){+.+.}-{3:3}, at: scan_update_work+0x1e/0xa0 net/bluetooth/hci_request.c:2686
#3: ffff88807ba00478 (&hdev->lock){+.+.}-{3:3}, at: update_scan+0x42/0x70 net/bluetooth/hci_request.c:2676
3 locks held by kworker/0:5/4233:
3 locks held by kworker/0:6/4234:
#0: ffff888016c70938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1
#1: ffffc900030bfd00 ((work_completion)(&w->work)#2){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285
#2: ffffffff8d4b23a8 (nf_conntrack_mutex){+.+.}-{3:3}, at: nf_ct_iterate_cleanup+0x47/0x3c0 net/netfilter/nf_conntrack_core.c:2394
3 locks held by kworker/0:9/4278:
#0: ffff888016c71938 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1
#1: ffffc9000115fd00 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285
#2: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x82/0xa90 net/wireless/reg.c:2437
3 locks held by kworker/u4:6/4290:
1 lock held by syz.0.633/6007:
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: netdev_wait_allrefs net/core/dev.c:10593 [inline]
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: netdev_run_todo+0x57c/0xac0 net/core/dev.c:10707
3 locks held by syz.3.828/6587:
#0: ffff88802297d3f0 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0x5f/0x1020 net/bluetooth/hci_core.c:1755
#1: ffff88802297c478 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_do_close+0x408/0x1020 net/bluetooth/hci_core.c:1800
#2: ffffffff8c3239e8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline]
#2: ffffffff8c3239e8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3a5/0x750 kernel/rcu/tree_exp.h:845
3 locks held by kworker/1:12/6762:
3 locks held by kworker/0:12/6817:
#0: ffff88802b349938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1
#1: ffffc9000321fd00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285
#2: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xc4/0x1530 net/ipv6/addrconf.c:4120
3 locks held by syz.5.907/6854:
#0: ffff88815453d3f0 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0x5f/0x1020 net/bluetooth/hci_core.c:1755
#1: ffff88815453c478 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_do_close+0x408/0x1020 net/bluetooth/hci_core.c:1800
#2: ffffffff8d593488 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1519 [inline]
#2: ffffffff8d593488 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xa4/0x220 net/bluetooth/hci_conn.c:1622
2 locks held by syz.2.916/6893:
#0: ffffffff966b96a0 (nfnl_subsys_ctnetlink){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:93 [inline]
#0: ffffffff966b96a0 (nfnl_subsys_ctnetlink){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0x9c6/0x1180 net/netfilter/nfnetlink.c:290
#1: ffffffff8d4b23a8 (nf_conntrack_mutex){+.+.}-{3:3}, at: nf_ct_iterate_cleanup+0x47/0x3c0 net/netfilter/nf_conntrack_core.c:2394
6 locks held by syz.6.944/6984:
#0: ffff8880797f1270 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x2bf/0x370 fs/file.c:1056
#1: ffff88802cbf4460 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x296/0xd70 fs/read_write.c:590
#2: ffff88806068e488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1dc/0x500 fs/kernfs/file.c:287
#3: ffff888142ddfbd0 (kn->active){++++}-{0:0}, at: kernfs_fop_write_iter+0x1fd/0x500 fs/kernfs/file.c:288
#4: ffffffff8c1d4a08 (param_lock){+.+.}-{3:3}, at: kernel_param_lock kernel/params.c:598 [inline]
#4: ffffffff8c1d4a08 (param_lock){+.+.}-{3:3}, at: param_attr_store+0xcb/0x300 kernel/params.c:583
#5: ffffffff8d4b23a8 (nf_conntrack_mutex){+.+.}-{3:3}, at: nf_conntrack_hash_resize+0x181/0x720 net/netfilter/nf_conntrack_core.c:2640
4 locks held by syz-executor/7009:
#0: ffffffff8d4a9db0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:802
#1: ffffffff8d4a9c08 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline]
#1: ffffffff8d4a9c08 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x161/0xfa0 net/netlink/genetlink.c:790
#2: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: ieee80211_register_hw+0x239f/0x3a60 net/mac80211/main.c:1251
#3: ffffffff8c1d4a08 (param_lock){+.+.}-{3:3}, at: ieee80211_rate_control_ops_get net/mac80211/rate.c:192 [inline]
#3: ffffffff8c1d4a08 (param_lock){+.+.}-{3:3}, at: rate_control_alloc net/mac80211/rate.c:239 [inline]
#3: ffffffff8c1d4a08 (param_lock){+.+.}-{3:3}, at: ieee80211_init_rate_ctrl_alg+0x171/0x5e0 net/mac80211/rate.c:983
1 lock held by syz-executor/7040:
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x79f/0xf10 net/core/rtnetlink.c:5695
3 locks held by kworker/1:17/7083:
#0: ffff88802b349938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1
#1: ffffc90003b57d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285
#2: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xc4/0x1530 net/ipv6/addrconf.c:4120
1 lock held by syz.4.974/7090:
#0: ffffffff966b96a0 (nfnl_subsys_ctnetlink){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:93 [inline]
#0: ffffffff966b96a0 (nfnl_subsys_ctnetlink){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0x9c6/0x1180 net/netfilter/nfnetlink.c:290
1 lock held by syz-executor/7097:
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x79f/0xf10 net/core/rtnetlink.c:5695
1 lock held by syz.1.978/7100:
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: start_sync_thread+0xc6/0x2890 net/netfilter/ipvs/ip_vs_sync.c:1769
1 lock held by syz-executor/7110:
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x79f/0xf10 net/core/rtnetlink.c:5695
1 lock held by syz-executor/7116:
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x79f/0xf10 net/core/rtnetlink.c:5695
1 lock held by syz-executor/7121:
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x79f/0xf10 net/core/rtnetlink.c:5695
1 lock held by syz-executor/7126:
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x79f/0xf10 net/core/rtnetlink.c:5695
1 lock held by syz-executor/7131:
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x79f/0xf10 net/core/rtnetlink.c:5695
1 lock held by dhcpcd/7135:
#0: ffff88807e40c120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1744 [inline]
#0: ffff88807e40c120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xd60 net/packet/af_packet.c:3243
1 lock held by dhcpcd/7136:
#0: ffff888049cfc120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1744 [inline]
#0: ffff888049cfc120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xd60 net/packet/af_packet.c:3243
1 lock held by dhcpcd/7137:
#0: ffff88805f48c120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1744 [inline]
#0: ffff88805f48c120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xd60 net/packet/af_packet.c:3243
1 lock held by syz-executor/7139:
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x79f/0xf10 net/core/rtnetlink.c:5695
1 lock held by syz-executor/7143:
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x79f/0xf10 net/core/rtnetlink.c:5695
1 lock held by syz-executor/7146:
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x79f/0xf10 net/core/rtnetlink.c:5695
1 lock held by syz-executor/7150:
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x79f/0xf10 net/core/rtnetlink.c:5695
1 lock held by syz-executor/7156:
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d44d008 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x79f/0xf10 net/core/rtnetlink.c:5695
4 locks held by kworker/u5:10/7158:
#0: ffff888079818938 ((wq_completion)hci18#2){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1
#1: ffffc9000323fd00 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285
#2: ffff888189ab8478 (&hdev->lock){+.+.}-{3:3}, at: hci_remote_features_evt+0xbb/0xa10 net/bluetooth/hci_event.c:3334
#3: ffffffff8d593488 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1504 [inline]
#3: ffffffff8d593488 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_remote_features_evt+0x5d9/0xa10 net/bluetooth/hci_event.c:3367
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
<TASK>
dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
nmi_cpu_backtrace+0x3a2/0x3d0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xe1b/0xe60 kernel/hung_task.c:369
kthread+0x42e/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 6762 Comm: kworker/1:12 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: events iterate_cleanup_work
RIP: 0010:check_kcov_mode kernel/kcov.c:171 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x13/0x60 kernel/kcov.c:205
Code: 48 8b 3d c0 04 12 0c 48 89 de 5b e9 57 65 44 00 00 00 cc cc 00 00 cc 48 8b 04 24 65 48 8b 0d 14 60 89 7e 65 8b 15 15 60 89 7e <81> e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 34 16 00 00
RSP: 0018:ffffc9000319fac0 EFLAGS: 00000202
RAX: ffffffff882833ec RBX: ffffc9005089ea80 RCX: ffff888025f7d940
RDX: 0000000080000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 1ffff9200a113d50 R08: ffffffff901ef157 R09: 1ffffffff203de2a
R10: dffffc0000000000 R11: fffffbfff203de2b R12: dffffc0000000000
R13: 0000000000000001 R14: ffffc9000319fb60 R15: ffffffff88283430
FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562ac3a72000 CR3: 000000002aa1c000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
get_next_corpse net/netfilter/nf_conntrack_core.c:2349 [inline]
nf_ct_iterate_cleanup+0x37c/0x3c0 net/netfilter/nf_conntrack_core.c:2395
nf_ct_iterate_cleanup_net+0x11d/0x190 net/netfilter/nf_conntrack_core.c:2479
iterate_cleanup_work+0x66/0x120 net/netfilter/nf_nat_masquerade.c:83
process_one_work+0x867/0xff0 kernel/workqueue.c:2310
worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457
kthread+0x42e/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
</TASK>