INFO: task syz-executor.0:15134 blocked for more than 143 seconds.
      Not tainted 6.10.0-rc2-syzkaller-00064-g71d7b52cc33b #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:24448 pid:15134 tgid:15128 ppid:13990  flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 jbd2_log_wait_commit+0x29f/0x4a0 fs/jbd2/journal.c:697
 ext4_fc_commit+0x1d5/0x2060 fs/ext4/fast_commit.c:1199
 ext4_fsync_journal fs/ext4/fsync.c:115 [inline]
 ext4_sync_file+0x6f2/0xb90 fs/ext4/fsync.c:167
 generic_write_sync include/linux/fs.h:2794 [inline]
 iomap_dio_complete+0x5a8/0x960 fs/iomap/direct-io.c:126
 ext4_dio_write_iter fs/ext4/file.c:577 [inline]
 ext4_file_write_iter+0x15e5/0x1a10 fs/ext4/file.c:696
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0xa74/0xc90 fs/read_write.c:590
 ksys_write+0x1a0/0x2c0 fs/read_write.c:643
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff4e1e7cee9
RSP: 002b:00007ff4e2b520c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff4e1fb4050 RCX: 00007ff4e1e7cee9
RDX: 000000000000f000 RSI: 0000000020000200 RDI: 0000000000000006
RBP: 00007ff4e1eda6fe R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007ff4e1fb4050 R15: 00007ffc4cd54408
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/1:0/25:
1 lock held by khungtaskd/30:
 #0: ffffffff8e333fa0 (
rcu_read_lock
){....}-{1:2}
, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
6 locks held by kworker/1:1/45:
3 locks held by kworker/0:2/781:
 #0: 
ffff888015079948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
ffff888015079948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
 #1: ffffc90003297d00 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
 #1: ffffc90003297d00 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
 #2: ffffffff8f5e72c8 (rtnl_mutex
){+.+.}-{3:3}, at: reg_check_chans_work+0x91/0xea0 net/wireless/reg.c:2478
2 locks held by getty/4846:
 #0: ffff8880301900a0
 (
&tty->ldisc_sem
){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: 
ffffc90002efe2f0
 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
3 locks held by syz-fuzzer/5086:
 #0: ffff88802944c420 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
 #1: 
ffff8880591d4a00 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:826 [inline]
ffff8880591d4a00 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_unlinkat+0x26a/0x830 fs/namei.c:4394
 #2: 
ffff888052e87200
 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:791 [inline]
 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_unlink+0xe4/0x650 fs/namei.c:4332
3 locks held by syz-fuzzer/5219:
 #0: 
ffff88802944c420
 (
sb_writers
#4
){.+.+}-{0:0}
, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
 #1: 
ffff888011f12200
 (
&type->i_mutex_dir_key
#3
/1
){+.+.}-{3:3}
, at: inode_lock_nested include/linux/fs.h:826 [inline]
, at: do_unlinkat+0x26a/0x830 fs/namei.c:4394
 #2: 
ffff888052c38e00
 (
&sb->s_type->i_mutex_key
#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:791 [inline]
#8){++++}-{3:3}, at: vfs_unlink+0xe4/0x650 fs/namei.c:4332
3 locks held by kworker/0:7/5177:
 #0: ffff888015078948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
 #0: ffff888015078948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
 #1: 
ffffc90002ee7d00
 (
deferred_process_work
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3207 [inline]
, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
 #2: 
ffffffff8f5e72c8
 (rtnl_mutex
){+.+.}-{3:3}
, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104
3 locks held by kworker/u8:30/8165:
 #0: 
ffff88802a94d148
 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
 #1: ffffc900117f7d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3207 [inline]
, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
 #2: 
ffffffff8f5e72c8
 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4193
3 locks held by syz-executor.2/14866:
 #0: 
ffffffff8f64d790
 (
cb_lock
){++++}-{3:3}
, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
 #1: 
ffffffff8f64d648 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:35 [inline]
ffffffff8f64d648 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:60 [inline]
ffffffff8f64d648 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x121/0xec0 net/netlink/genetlink.c:1209
 #2: ffffffff8f5e72c8 (rtnl_mutex){+.+.}-{3:3}, at: ieee80211_register_hw+0x2bd3/0x3d80 net/mac80211/main.c:1501
6 locks held by syz-executor.4/15125:
3 locks held by syz-executor.0/15134:
 #0: 
ffff88802d0360c8
 (
&f->f_pos_lock
){+.+.}-{3:3}
, at: __fdget_pos+0x24e/0x310 fs/file.c:1191
 #1: 
ffff88802944c420
 (sb_writers
#4
){.+.+}-{0:0}
, at: file_start_write include/linux/fs.h:2854 [inline]
, at: vfs_write+0x227/0xc90 fs/read_write.c:586
 #2: ffff888052e87200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:791 [inline]
 #2: ffff888052e87200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_dio_write_iter fs/ext4/file.c:530 [inline]
 #2: ffff888052e87200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_file_write_iter+0x388/0x1a10 fs/ext4/file.c:696
2 locks held by syz-executor.3/15155:
 #0: 
ffff88802472e0c8
 (
&f->f_pos_lock
){+.+.}-{3:3}
, at: __fdget_pos+0x24e/0x310 fs/file.c:1191
 #1: 
ffff88802944c420
 (
sb_writers
#4
){.+.+}-{0:0}
, at: file_start_write include/linux/fs.h:2854 [inline]
, at: vfs_write+0x227/0xc90 fs/read_write.c:586
3 locks held by syz-executor.1/15162:
 #0: 
ffff888023fd2ac8
 (
&f->f_pos_lock
){+.+.}-{3:3}
, at: __fdget_pos+0x24e/0x310 fs/file.c:1191
 #1: 
ffff88802944c420
 (
sb_writers#4){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2854 [inline]
sb_writers#4){.+.+}-{0:0}, at: vfs_write+0x227/0xc90 fs/read_write.c:586
 #2: ffff888052c38e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:791 [inline]
 #2: ffff888052c38e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_dio_write_iter fs/ext4/file.c:530 [inline]
 #2: ffff888052c38e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_file_write_iter+0x388/0x1a10 fs/ext4/file.c:696
2 locks held by syz-executor.5/15165:
 #0: ffffffff8f5e72c8
 (
rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6592
 #1: 
ffffffff8e1ce5b0
 (
cpu_hotplug_lock
){++++}-{0:0}
, at: flush_all_backlogs net/core/dev.c:5983 [inline]
, at: unregister_netdevice_many_notify+0x607/0x16b0 net/core/dev.c:11200
1 lock held by syz-executor.4/15167:
 #0: ffffffff8f5e72c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8f5e72c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6592
1 lock held by syz-executor.3/15170:
 #0: ffffffff8f5e72c8
 (rtnl_mutex){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6592
1 lock held by syz-executor.5/15173:
 #0: 
ffffffff8f5e72c8
 (
rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6592
1 lock held by syz-executor.2/15176:
 #0: 
ffffffff8f5e72c8
 (
rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6592
1 lock held by syz-executor.4/15179:
 #0: 
ffffffff8f5e72c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
ffffffff8f5e72c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6592
1 lock held by syz-executor.3/15182:
 #0: 
ffffffff8f5e72c8
 (
rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6592
1 lock held by syz-executor.5/15185:
 #0: 
ffffffff8f5e72c8
 (rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6592
1 lock held by syz-executor.2/15188:
 #0: 
ffffffff8f5e72c8
 (
rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6592

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

NMI backtrace for cpu 0
CPU: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc2-syzkaller-00064-g71d7b52cc33b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
 <TASK>
 __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:162 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
 watchdog+0xfde/0x1020 kernel/hung_task.c:379
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
yealink 6-1:36.0: urb_ctl_callback - urb status -71
NMI backtrace for cpu 1
CPU: 1 PID: 15125 Comm: syz-executor.4 Not tainted 6.10.0-rc2-syzkaller-00064-g71d7b52cc33b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:io_serial_in+0x76/0xb0 drivers/tty/serial/8250/8250_port.c:406
Code: 20 d2 59 fc 89 e9 41 d3 e6 48 83 c3 40 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 01 92 bf fc 44 03 33 44 89 f2 ec <0f> b6 c0 5b 41 5e 41 5f 5d e9 77 ec 73 06 89 e9 80 e1 07 38 c1 7c
RSP: 0018:ffffc90000a18098 EFLAGS: 00000002
RAX: 1ffffffff2959c00 RBX: ffffffff94ace200 RCX: 0000000000000000
RDX: 00000000000003fd RSI: 0000000000000000 RDI: 0000000000000020
RBP: 0000000000000000 R08: ffffffff853c5456 R09: 1ffff11003f4b046
R10: dffffc0000000000 R11: ffffffff853c5410 R12: dffffc0000000000
R13: 00000000000026e3 R14: 00000000000003fd R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0df81b0000 CR3: 000000000e132000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 serial_in drivers/tty/serial/8250/8250.h:117 [inline]
 serial_lsr_in drivers/tty/serial/8250/8250.h:139 [inline]
 wait_for_lsr drivers/tty/serial/8250/8250_port.c:2068 [inline]
 serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3315 [inline]
 serial8250_console_write+0x109b/0x1770 drivers/tty/serial/8250/8250_port.c:3393
 console_emit_next_record kernel/printk/printk.c:2928 [inline]
 console_flush_all+0x867/0xfd0 kernel/printk/printk.c:2994
 console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3063
 vprintk_emit+0x5a6/0x770 kernel/printk/printk.c:2345
 dev_vprintk_emit+0x2ae/0x330 drivers/base/core.c:4951
 dev_printk_emit+0xdd/0x120 drivers/base/core.c:4962
 _dev_err+0x122/0x170 drivers/base/core.c:5017
 urb_ctl_callback+0x1d3/0x290 drivers/input/misc/yealink.c:454
 __usb_hcd_giveback_urb+0x375/0x530 drivers/usb/core/hcd.c:1648
 dummy_timer+0x830/0x45d0 drivers/usb/gadget/udc/dummy_hcd.c:1987
 __run_hrtimer kernel/time/hrtimer.c:1687 [inline]
 __hrtimer_run_queues+0x59d/0xd50 kernel/time/hrtimer.c:1751
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1813
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x112/0x3f0 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 fe b2 6a f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 33 67 d4 f5 65 8b 05 64 a1 72 74 85 c0 74 43 48 c7 04 24 0e 36
RSP: 0018:ffffc900045ef0e0 EFLAGS: 00000206
RAX: 84f1a37497ae9900 RBX: 1ffff920008bde20 RCX: ffffffff8172d78a
RDX: dffffc0000000000 RSI: ffffffff8bcabb80 RDI: 0000000000000001
RBP: ffffc900045ef170 R08: ffffffff92fa85b7 R09: 1ffffffff25f50b6
R10: dffffc0000000000 R11: fffffbfff25f50b7 R12: dffffc0000000000
R13: 1ffff920008bde1c R14: ffffc900045ef100 R15: 0000000000000246
 __debug_check_no_obj_freed lib/debugobjects.c:998 [inline]
 debug_check_no_obj_freed+0x561/0x580 lib/debugobjects.c:1019
 free_pages_prepare mm/page_alloc.c:1095 [inline]
 free_unref_folios+0x537/0x19e0 mm/page_alloc.c:2614
 folios_put_refs+0x93a/0xa60 mm/swap.c:1024
 free_pages_and_swap_cache+0x2ea/0x690 mm/swap_state.c:329
 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline]
 tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:366 [inline]
 tlb_flush_mmu+0x3a3/0x680 mm/mmu_gather.c:373
 tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:465
 exit_mmap+0x44f/0xc80 mm/mmap.c:3354
 __mmput+0x115/0x3c0 kernel/fork.c:1346
 exit_mm+0x220/0x310 kernel/exit.c:565
 do_exit+0x9aa/0x27e0 kernel/exit.c:861
 do_group_exit+0x207/0x2c0 kernel/exit.c:1023
 get_signal+0x16a1/0x1740 kernel/signal.c:2909
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f43c8a7cc4b
Code: Unable to access opcode bytes at 0x7f43c8a7cc21.
RSP: 002b:00007f43c97a90f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f43c8a7cc4b
RDX: 0000000000000000 RSI: 0000000000006364 RDI: 00000000000000db
RBP: 00007f43c8bb41f0 R08: 0000000000000000 R09: 00007ffc917f3857
R10: 0000000000000008 R11: 0000000000000246 R12: ffffffffffffffb0
R13: 000000000000006e R14: 00007ffc917f3770 R15: 00007ffc917f3858
 </TASK>
yealink 6-1:36.0: urb_irq_callback - urb status -71
yealink 6-1:36.0: unexpected response 0
yealink 6-1:36.0: urb_ctl_callback - urb status -71
yealink 6-1:36.0: urb_irq_callback - urb status -71
yealink 6-1:36.0: unexpected response 0
yealink 6-1:36.0: urb_ctl_callback - urb status -71
yealink 6-1:36.0: urb_irq_callback - urb status -71
yealink 6-1:36.0: unexpected response 0
yealink 6-1:36.0: urb_ctl_callback - urb status -71
yealink 6-1:36.0: urb_irq_callback - urb status -71
yealink 6-1:36.0: unexpected response 0
yealink 6-1:36.0: urb_ctl_callback - urb status -71
yealink 6-1:36.0: urb_irq_callback - urb status -71