INFO: task udevd:3560 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd           state:D stack:25440 pid: 3560 ppid:     1 flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11bb/0x4390 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+0xc71/0x2390 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]
 uevent_show+0x17a/0x330 drivers/base/core.c:2408
 dev_attr_show+0x50/0xb0 drivers/base/core.c:2110
 sysfs_kf_seq_show+0x316/0x4c0 fs/sysfs/file.c:61
 seq_read_iter+0x49b/0xd50 fs/seq_file.c:230
 call_read_iter include/linux/fs.h:2166 [inline]
 new_sync_read fs/read_write.c:404 [inline]
 vfs_read+0x725/0xcf0 fs/read_write.c:485
 ksys_read+0x14d/0x250 fs/read_write.c:623
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fae5762c407
RSP: 002b:00007ffd58ea6ff0 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fae5753e880 RCX: 00007fae5762c407
RDX: 0000000000001000 RSI: 000055cde4c1af30 RDI: 000000000000000c
RBP: 00007fae57774ff0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 000000000000000a
R13: 00007fae57774ea0 R14: 0000000000000000 R15: 000055cde4c1bf50
 </TASK>
INFO: task kworker/u4:5:4313 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:5    state:D stack:25672 pid: 4313 ppid:     2 flags:0x00004000
Workqueue: nfc2_nci_cmd_wq nci_cmd_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11bb/0x4390 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+0xc71/0x2390 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
 virtual_nci_send+0x1d/0xd0 drivers/nfc/virtual_ncidev.c:54
 nci_cmd_work+0xa6/0x2b0 net/nfc/nci/core.c:1593
 process_one_work+0x863/0x1000 kernel/workqueue.c:2310
 worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
INFO: task syz.4.177:6229 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.177       state:D stack:25856 pid: 6229 ppid:  4972 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11bb/0x4390 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+0xc71/0x2390 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_register_device+0x9d/0x310 net/nfc/core.c:1128
 nci_register_device+0x87c/0x9c0 net/nfc/nci/core.c:1269
 virtual_ncidev_open+0x55/0xc0 drivers/nfc/virtual_ncidev.c:150
 misc_open+0x2f2/0x360 drivers/char/misc.c:141
 chrdev_open+0x597/0x670 fs/char_dev.c:414
 do_dentry_open+0x7ff/0xf80 fs/open.c:826
 do_open fs/namei.c:3608 [inline]
 path_openat+0x2682/0x2f30 fs/namei.c:3742
 do_filp_open+0x1b3/0x3e0 fs/namei.c:3769
 do_sys_openat2+0x142/0x4a0 fs/open.c:1253
 do_sys_open fs/open.c:1269 [inline]
 __do_sys_openat fs/open.c:1285 [inline]
 __se_sys_openat fs/open.c:1280 [inline]
 __x64_sys_openat+0x135/0x160 fs/open.c:1280
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fbce75eeda9
RSP: 002b:00007fbce683f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fbce7808080 RCX: 00007fbce75eeda9
RDX: 0000000000000002 RSI: 0000000020000080 RDI: ffffffffffffff9c
RBP: 00007fbce76702a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fbce7808080 R15: 00007ffd413b4138
 </TASK>
INFO: task syz.2.178:6236 blocked for more than 144 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.178       state:D stack:27552 pid: 6236 ppid:  4968 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11bb/0x4390 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+0xc71/0x2390 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
 misc_open+0x56/0x360 drivers/char/misc.c:107
 chrdev_open+0x597/0x670 fs/char_dev.c:414
 do_dentry_open+0x7ff/0xf80 fs/open.c:826
 do_open fs/namei.c:3608 [inline]
 path_openat+0x2682/0x2f30 fs/namei.c:3742
 do_filp_open+0x1b3/0x3e0 fs/namei.c:3769
 do_sys_openat2+0x142/0x4a0 fs/open.c:1253
 do_sys_open fs/open.c:1269 [inline]
 __do_sys_openat fs/open.c:1285 [inline]
 __se_sys_openat fs/open.c:1280 [inline]
 __x64_sys_openat+0x135/0x160 fs/open.c:1280
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f54c8bacda9
RSP: 002b:00007f54c7dfd038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f54c8dc6080 RCX: 00007f54c8bacda9
RDX: 0000000000000002 RSI: 0000000020000080 RDI: ffffffffffffff9c
RBP: 00007f54c8c2e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f54c8dc6080 R15: 00007ffe298cb2b8
 </TASK>
INFO: task syz.2.178:6241 blocked for more than 144 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.178       state:D stack:26600 pid: 6241 ppid:  4968 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11bb/0x4390 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+0xc71/0x2390 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
 virtual_nci_close+0x13/0x40 drivers/nfc/virtual_ncidev.c:44
 nci_open_device net/nfc/nci/core.c:544 [inline]
 nci_dev_up+0x94d/0xd20 net/nfc/nci/core.c:631
 nfc_dev_up+0x165/0x310 net/nfc/core.c:118
 nfc_genl_dev_up+0x85/0xd0 net/nfc/netlink.c:770
 genl_family_rcv_msg_doit net/netlink/genetlink.c:731 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:775 [inline]
 genl_rcv_msg+0xbc6/0xf40 net/netlink/genetlink.c:792
 netlink_rcv_skb+0x1e0/0x430 net/netlink/af_netlink.c:2507
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x774/0x920 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x8ab/0xbc0 net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 ____sys_sendmsg+0x5a2/0x8c0 net/socket.c:2436
 ___sys_sendmsg+0x1f0/0x260 net/socket.c:2490
 __sys_sendmsg net/socket.c:2519 [inline]
 __do_sys_sendmsg net/socket.c:2528 [inline]
 __se_sys_sendmsg+0x190/0x250 net/socket.c:2526
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f54c8bacda9
RSP: 002b:00007f54c7ddc038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f54c8dc6160 RCX: 00007f54c8bacda9
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000007
RBP: 00007f54c8c2e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f54c8dc6160 R15: 00007ffe298cb2b8
 </TASK>
INFO: task syz.3.180:6233 blocked for more than 144 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.180       state:D stack:26880 pid: 6233 ppid:  4970 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11bb/0x4390 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+0xc71/0x2390 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
 misc_open+0x56/0x360 drivers/char/misc.c:107
 chrdev_open+0x597/0x670 fs/char_dev.c:414
 do_dentry_open+0x7ff/0xf80 fs/open.c:826
 do_open fs/namei.c:3608 [inline]
 path_openat+0x2682/0x2f30 fs/namei.c:3742
 do_filp_open+0x1b3/0x3e0 fs/namei.c:3769
 do_sys_openat2+0x142/0x4a0 fs/open.c:1253
 do_sys_open fs/open.c:1269 [inline]
 __do_sys_openat fs/open.c:1285 [inline]
 __se_sys_openat fs/open.c:1280 [inline]
 __x64_sys_openat+0x135/0x160 fs/open.c:1280
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fc2290feda9
RSP: 002b:00007fc22834f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fc229318080 RCX: 00007fc2290feda9
RDX: 0000000000000002 RSI: 0000000020000080 RDI: ffffffffffffff9c
RBP: 00007fc2291802a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc229318080 R15: 00007ffc5ece2a18
 </TASK>
INFO: task syz.3.180:6242 blocked for more than 145 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.180       state:D stack:26592 pid: 6242 ppid:  4970 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11bb/0x4390 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+0xc71/0x2390 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
 genl_lock net/netlink/genetlink.c:33 [inline]
 genl_rcv_msg+0x137/0xf40 net/netlink/genetlink.c:790
 netlink_rcv_skb+0x1e0/0x430 net/netlink/af_netlink.c:2507
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x774/0x920 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x8ab/0xbc0 net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 __sys_sendto+0x423/0x580 net/socket.c:2063
 __do_sys_sendto net/socket.c:2075 [inline]
 __se_sys_sendto net/socket.c:2071 [inline]
 __x64_sys_sendto+0xda/0xf0 net/socket.c:2071
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fc229100c3c
RSP: 002b:00007fc22832cec0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fc22832cfc0 RCX: 00007fc229100c3c
RDX: 000000000000001c RSI: 00007fc22832d010 RDI: 0000000000000008
RBP: 0000000000000000 R08: 00007fc22832cf14 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000008
R13: 00007fc22832cf68 R14: 00007fc22832d010 R15: 0000000000000000
 </TASK>
INFO: task syz.1.179:6231 blocked for more than 145 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.179       state:D stack:26976 pid: 6231 ppid:  4966 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11bb/0x4390 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+0xc71/0x2390 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
 misc_open+0x56/0x360 drivers/char/misc.c:107
 chrdev_open+0x597/0x670 fs/char_dev.c:414
 do_dentry_open+0x7ff/0xf80 fs/open.c:826
 do_open fs/namei.c:3608 [inline]
 path_openat+0x2682/0x2f30 fs/namei.c:3742
 do_filp_open+0x1b3/0x3e0 fs/namei.c:3769
 do_sys_openat2+0x142/0x4a0 fs/open.c:1253
 do_sys_open fs/open.c:1269 [inline]
 __do_sys_openat fs/open.c:1285 [inline]
 __se_sys_openat fs/open.c:1280 [inline]
 __x64_sys_openat+0x135/0x160 fs/open.c:1280
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f8c2b78eda9
RSP: 002b:00007f8c2a9df038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f8c2b9a8080 RCX: 00007f8c2b78eda9
RDX: 0000000000000002 RSI: 0000000020000080 RDI: ffffffffffffff9c
RBP: 00007f8c2b8102a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8c2b9a8080 R15: 00007ffc169d2d48
 </TASK>
INFO: task syz.1.179:6240 blocked for more than 145 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.179       state:D stack:26624 pid: 6240 ppid:  4966 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11bb/0x4390 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+0xc71/0x2390 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
 genl_lock net/netlink/genetlink.c:33 [inline]
 genl_rcv_msg+0x137/0xf40 net/netlink/genetlink.c:790
 netlink_rcv_skb+0x1e0/0x430 net/netlink/af_netlink.c:2507
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x774/0x920 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x8ab/0xbc0 net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 __sys_sendto+0x423/0x580 net/socket.c:2063
 __do_sys_sendto net/socket.c:2075 [inline]
 __se_sys_sendto net/socket.c:2071 [inline]
 __x64_sys_sendto+0xda/0xf0 net/socket.c:2071
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f8c2b790c3c
RSP: 002b:00007f8c2a9bcec0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f8c2a9bcfc0 RCX: 00007f8c2b790c3c
RDX: 000000000000001c RSI: 00007f8c2a9bd010 RDI: 0000000000000008
RBP: 0000000000000000 R08: 00007f8c2a9bcf14 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000008
R13: 00007f8c2a9bcf68 R14: 00007f8c2a9bd010 R15: 0000000000000000
 </TASK>
INFO: task syz.0.181:6244 blocked for more than 146 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.181       state:D stack:27872 pid: 6244 ppid:  4963 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11bb/0x4390 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+0xc71/0x2390 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
 misc_open+0x56/0x360 drivers/char/misc.c:107
 chrdev_open+0x597/0x670 fs/char_dev.c:414
 do_dentry_open+0x7ff/0xf80 fs/open.c:826
 do_open fs/namei.c:3608 [inline]
 path_openat+0x2682/0x2f30 fs/namei.c:3742
 do_filp_open+0x1b3/0x3e0 fs/namei.c:3769
 do_sys_openat2+0x142/0x4a0 fs/open.c:1253
 do_sys_open fs/open.c:1269 [inline]
 __do_sys_openat fs/open.c:1285 [inline]
 __se_sys_openat fs/open.c:1280 [inline]
 __x64_sys_openat+0x135/0x160 fs/open.c:1280
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7efd91cf0da9
RSP: 002b:00007efd90f41038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007efd91f0a080 RCX: 00007efd91cf0da9
RDX: 0000000000000002 RSI: 0000000020000080 RDI: ffffffffffffff9c
RBP: 00007efd91d722a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007efd91f0a080 R15: 00007fffc20193c8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffffffff8c11c460 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
4 locks held by udevd/3560:
 #0: ffff8880249ec1c8 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xad/0xd50 fs/seq_file.c:182
 #1: ffff88802a3a8488 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x51/0x3c0 fs/kernfs/file.c:112
 #2: ffff8880555e81d8 (kn->active#32){++++}-{0:0}, at: kernfs_seq_start+0x71/0x3c0 fs/kernfs/file.c:113
 #3: ffff88807605f190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #3: ffff88807605f190 (&dev->mutex){....}-{3:3}, at: uevent_show+0x17a/0x330 drivers/base/core.c:2408
2 locks held by getty/3952:
 #0: ffff88802bd23098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
 #1: ffffc900025db2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5ba/0x1a30 drivers/tty/n_tty.c:2158
3 locks held by kworker/u4:5/4313:
 #0: ffff88802b903938 ((wq_completion)nfc2_nci_cmd_wq){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
 #1: ffffc9000331fd00 ((work_completion)(&ndev->cmd_work)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285
 #2: ffffffff8c94a828 (nci_mutex){+.+.}-{3:3}, at: virtual_nci_send+0x1d/0xd0 drivers/nfc/virtual_ncidev.c:54
3 locks held by syz.4.177/6229:
 #0: ffffffff8c804528 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
 #1: ffffffff8c94a828 (nci_mutex){+.+.}-{3:3}, at: virtual_ncidev_open+0x15/0xc0 drivers/nfc/virtual_ncidev.c:137
 #2: ffff88807605f190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #2: ffff88807605f190 (&dev->mutex){....}-{3:3}, at: nfc_register_device+0x9d/0x310 net/nfc/core.c:1128
1 lock held by syz.2.178/6236:
 #0: ffffffff8c804528 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
5 locks held by syz.2.178/6241:
 #0: ffffffff8d294a10 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:802
 #1: ffffffff8d294868 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline]
 #1: ffffffff8d294868 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x137/0xf40 net/netlink/genetlink.c:790
 #2: ffff88807605f190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #2: ffff88807605f190 (&dev->mutex){....}-{3:3}, at: nfc_dev_up+0x3b/0x310 net/nfc/core.c:95
 #3: ffff88807605c350 (&ndev->req_lock){+.+.}-{3:3}, at: nci_open_device net/nfc/nci/core.c:477 [inline]
 #3: ffff88807605c350 (&ndev->req_lock){+.+.}-{3:3}, at: nci_dev_up+0xa0/0xd20 net/nfc/nci/core.c:631
 #4: ffffffff8c94a828 (nci_mutex){+.+.}-{3:3}, at: virtual_nci_close+0x13/0x40 drivers/nfc/virtual_ncidev.c:44
1 lock held by syz.3.180/6233:
 #0: ffffffff8c804528 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
2 locks held by syz.3.180/6242:
 #0: ffffffff8d294a10 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:802
 #1: ffffffff8d294868 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline]
 #1: ffffffff8d294868 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x137/0xf40 net/netlink/genetlink.c:790
1 lock held by syz.1.179/6231:
 #0: ffffffff8c804528 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
2 locks held by syz.1.179/6240:
 #0: ffffffff8d294a10 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:802
 #1: ffffffff8d294868 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline]
 #1: ffffffff8d294868 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x137/0xf40 net/netlink/genetlink.c:790
1 lock held by syz.0.181/6244:
 #0: ffffffff8c804528 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
2 locks held by syz.0.181/6247:
 #0: ffffffff8d294a10 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:802
 #1: ffffffff8d294868 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline]
 #1: ffffffff8d294868 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x137/0xf40 net/netlink/genetlink.c:790
1 lock held by syz-executor/6489:
 #0: ffffffff8c804528 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/6491:
 #0: ffffffff8c804528 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/6492:
 #0: ffffffff8c804528 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/6494:
 #0: ffffffff8c804528 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/6495:
 #0: ffffffff8c804528 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/6499:
 #0: ffffffff8c804528 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/6501:
 #0: ffffffff8c804528 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/6503:
 #0: ffffffff8c804528 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/6505:
 #0: ffffffff8c804528 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/6506:
 #0: ffffffff8c804528 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/6515:
 #0: ffffffff8c804528 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/6518:
 #0: ffffffff8c804528 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/6520:
 #0: ffffffff8c804528 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/6521:
 #0: ffffffff8c804528 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/6522:
 #0: ffffffff8c804528 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x397/0x3d0 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+0xe0f/0xe50 kernel/hung_task.c:369
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5206 Comm: kworker/u4:6 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: bat_events batadv_nc_worker
RIP: 0010:lock_release+0x6/0x870 kernel/locking/lockdep.c:5631
Code: c1 03 38 c1 0f 8c c1 f8 ff ff 48 89 df e8 32 b9 5f 00 e9 b4 f8 ff ff bb 2f 00 00 00 e9 ca f8 ff ff 0f 1f 00 55 48 89 e5 41 57 <41> 56 41 55 41 54 53 48 83 e4 e0 48 81 ec e0 00 00 00 48 89 74 24
RSP: 0018:ffffc900039ffbc8 EFLAGS: 00000293
RAX: ffffffff897eb5aa RBX: dffffc0000000000 RCX: ffff88807726d940
RDX: 0000000000000000 RSI: ffffffff897eb5a5 RDI: ffffffff8c11c460
RBP: ffffc900039ffbd0 R08: dffffc0000000000 R09: fffffbfff1ff7619
R10: fffffbfff1ff7619 R11: 1ffffffff1ff7618 R12: 00000000000001bf
R13: fffffffffffffe38 R14: ffff8880745d0c80 R15: ffff888018dd7f50
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005618bf045168 CR3: 000000002a861000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 rcu_read_unlock include/linux/rcupdate.h:772 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:416 [inline]
 batadv_nc_worker+0x25b/0x5c0 net/batman-adv/network-coding.c:723
 process_one_work+0x863/0x1000 kernel/workqueue.c:2310
 worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>