syzbot


INFO: task hung in nfc_targets_found

Status: auto-obsoleted due to no activity on 2023/09/27 16:29
Reported-by: syzbot+0abed2617c7ddfbc3bc6@syzkaller.appspotmail.com
First crash: 568d, last: 506d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 INFO: task hung in nfc_targets_found 1 537d 537d 0/3 auto-obsoleted due to no activity on 2023/08/27 16:54
upstream INFO: task hung in nfc_targets_found net nfc C done done 45 215d 308d 0/28 auto-obsoleted due to no activity on 2024/07/15 02:26

Sample crash report:
INFO: task kworker/u4:11:4254 blocked for more than 146 seconds.
      Not tainted 5.15.117-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:11   state:D stack:21024 pid: 4254 ppid:     2 flags:0x00004000
Workqueue: nfc2_nci_rx_wq nci_rx_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5026 [inline]
 __schedule+0x12c4/0x4590 kernel/sched/core.c:6372
 schedule+0x11b/0x1f0 kernel/sched/core.c:6455
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6514
 __mutex_lock_common+0xe34/0x25a0 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
 device_lock include/linux/device.h:760 [inline]
 nfc_targets_found+0x26b/0x580 net/nfc/core.c:778
 nci_ntf_packet+0x430f/0x4e00
 nci_rx_work+0xf7/0x260 net/nfc/nci/core.c:1517
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2307
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2454
 kthread+0x3f6/0x4f0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>
INFO: task kworker/1:13:4533 blocked for more than 150 seconds.
      Not tainted 5.15.117-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:13    state:D stack:20536 pid: 4533 ppid:     2 flags:0x00004000
Workqueue: events nfc_urelease_event_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5026 [inline]
 __schedule+0x12c4/0x4590 kernel/sched/core.c:6372
 schedule+0x11b/0x1f0 kernel/sched/core.c:6455
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6514
 __mutex_lock_common+0xe34/0x25a0 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
 nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2307
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2454
 kthread+0x3f6/0x4f0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>
INFO: task kworker/0:11:4610 blocked for more than 151 seconds.
      Not tainted 5.15.117-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:11    state:D stack:21272 pid: 4610 ppid:     2 flags:0x00004000
Workqueue: events nfc_urelease_event_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5026 [inline]
 __schedule+0x12c4/0x4590 kernel/sched/core.c:6372
 schedule+0x11b/0x1f0 kernel/sched/core.c:6455
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6514
 __mutex_lock_common+0xe34/0x25a0 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
 nci_request net/nfc/nci/core.c:148 [inline]
 nci_stop_poll+0x11f/0x480 net/nfc/nci/core.c:872
 nfc_stop_poll+0xe6/0x220 net/nfc/core.c:259
 nfc_urelease_event_work+0x162/0x2f0 net/nfc/netlink.c:1826
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2307
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2454
 kthread+0x3f6/0x4f0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>
INFO: task syz-executor.5:14044 blocked for more than 153 seconds.
      Not tainted 5.15.117-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5  state:D stack:26880 pid:14044 ppid: 12700 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5026 [inline]
 __schedule+0x12c4/0x4590 kernel/sched/core.c:6372
 schedule+0x11b/0x1f0 kernel/sched/core.c:6455
 schedule_timeout+0xac/0x300 kernel/time/timer.c:1860
 do_wait_for_common+0x2d9/0x480 kernel/sched/completion.c:85
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x48/0x60 kernel/sched/completion.c:138
 flush_workqueue+0x737/0x1610 kernel/workqueue.c:2879
 nci_close_device+0x185/0x5f0 net/nfc/nci/core.c:578
 nci_unregister_device+0x3c/0x230 net/nfc/nci/core.c:1295
 virtual_ncidev_close+0x55/0x90 drivers/nfc/virtual_ncidev.c:166
 __fput+0x3bf/0x890 fs/file_table.c:280
 task_work_run+0x129/0x1a0 kernel/task_work.c:164
 get_signal+0x143a/0x14e0 kernel/signal.c:2661
 arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:865
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f99a70de389
RSP: 002b:00007f99a562f168 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: fffffffffffffff2 RBX: 00007f99a71fe050 RCX: 00007f99a70de389
RDX: 0000000000000064 RSI: 0000000020000840 RDI: 0000000000000003
RBP: 00007f99a7129493 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe5d5dd67f R14: 00007f99a562f300 R15: 0000000000022000
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/0:0/7:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc90000cc7d20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/0:1/13:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc90000d27d20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/1:0/21:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc90000db7d20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/1:1/25:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc90000dffd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
1 lock held by khungtaskd/27:
 #0: ffffffff8c91c5e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
4 locks held by kworker/u4:1/144:
3 locks held by kworker/1:2/1067:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc90004cd7d20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/0:2/1070:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc90004d3fd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/0:3/3246:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc90002b9fd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
2 locks held by getty/3258:
 #0: ffff88814b788098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
 #1: ffffc90002bb32e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1da0 drivers/tty/n_tty.c:2147
3 locks held by kworker/1:3/3583:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc900044a7d20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/1:4/3585:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc900044c7d20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/1:5/3586:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc900044d7d20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/0:4/3587:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc900044e7d20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/1:6/3588:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc900044f7d20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/0:5/3594:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc90004517d20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/0:8/3625:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc900045afd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/1:8/3925:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc90004b57d20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/1:9/3926:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc90004a6fd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/1:10/3927:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc9000469fd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/1:12/3929:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc900049dfd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/u4:11/4254:
 #0: ffff888019eb9138 ((wq_completion)nfc2_nci_rx_wq){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc900045ffd20 ((work_completion)(&ndev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffff888147aea190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #2: ffff888147aea190 (&dev->mutex){....}-{3:3}, at: nfc_targets_found+0x26b/0x580 net/nfc/core.c:778
3 locks held by kworker/1:13/4533:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc900059efd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/1:14/4534:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc90005a1fd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/0:9/4607:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc90005b3fd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/0:10/4609:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc90006cb7d20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
6 locks held by kworker/0:11/4610:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc90006cc7d20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
 #3: ffff888147aea5d0 (&genl_data->genl_data_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0x113/0x2f0 net/nfc/netlink.c:1823
 #4: ffff888147aea190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #4: ffff888147aea190 (&dev->mutex){....}-{3:3}, at: nfc_stop_poll+0x38/0x220 net/nfc/core.c:247
 #5: ffff888022b15350 (&ndev->req_lock){+.+.}-{3:3}, at: nci_request net/nfc/nci/core.c:148 [inline]
 #5: ffff888022b15350 (&ndev->req_lock){+.+.}-{3:3}, at: nci_stop_poll+0x11f/0x480 net/nfc/nci/core.c:872
3 locks held by kworker/0:12/4613:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc90006cf7d20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/1:15/4652:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc9000ae57d20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/1:16/4653:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc90005c0fd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/1:18/4655:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc9000afffd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/1:19/4656:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc9000b00fd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/0:13/4782:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc9000bf57d20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/0:14/4791:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc9000c0a7d20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/1:21/8148:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc9000302fd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/1:22/8149:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc90004537d20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/1:23/8150:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc9000457fd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/0:15/9068:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc9000b14fd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/0:17/9070:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc9000b32fd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/0:18/9075:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc9000b98fd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/0:19/9076:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc90006c4fd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/0:21/9335:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc9000464fd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/0:22/9936:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc90004d4fd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
1 lock held by syz-executor.5/14044:
 #0: ffff888022b15350 (&ndev->req_lock){+.+.}-{3:3}, at: nci_close_device+0x106/0x5f0 net/nfc/nci/core.c:560
3 locks held by kworker/0:6/14206:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc90004dbfd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffffffff8dcb11a8 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa9/0x2f0 net/nfc/netlink.c:1817
3 locks held by kworker/0:7/14211:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/06/19 16:28 linux-5.15.y 471e639e59d1 d521bc56 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: task hung in nfc_targets_found
2023/04/18 21:11 linux-5.15.y 4fdad925aa1a d931e9f0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: task hung in nfc_targets_found
* Struck through repros no longer work on HEAD.