INFO: task syz.2.19:4523 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.19        state:D stack:0     pid:4523  ppid:4441   flags:0x00000001
Call trace:
 __switch_to+0x2f4/0x550 arch/arm64/kernel/process.c:555
 context_switch kernel/sched/core.c:5246 [inline]
 __schedule+0xdb4/0x1a6c kernel/sched/core.c:6563
 schedule+0xc4/0x170 kernel/sched/core.c:6639
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6698
 __mutex_lock_common+0xb20/0x1f3c kernel/locking/mutex.c:679
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
 write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
 nfsctl_transaction_write+0x114/0x164 fs/nfsd/nfsctl.c:114
 vfs_write+0x2a8/0x7c8 fs/read_write.c:582
 ksys_write+0x12c/0x228 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:646
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
INFO: task syz.3.20:4524 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.20        state:D stack:0     pid:4524  ppid:4447   flags:0x00000001
Call trace:
 __switch_to+0x2f4/0x550 arch/arm64/kernel/process.c:555
 context_switch kernel/sched/core.c:5246 [inline]
 __schedule+0xdb4/0x1a6c kernel/sched/core.c:6563
 schedule+0xc4/0x170 kernel/sched/core.c:6639
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6698
 __mutex_lock_common+0xb20/0x1f3c kernel/locking/mutex.c:679
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
 write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
 nfsctl_transaction_write+0x114/0x164 fs/nfsd/nfsctl.c:114
 vfs_write+0x2a8/0x7c8 fs/read_write.c:582
 ksys_write+0x12c/0x228 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:646
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
INFO: task syz.4.21:4525 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.21        state:D stack:0     pid:4525  ppid:4451   flags:0x00000001
Call trace:
 __switch_to+0x2f4/0x550 arch/arm64/kernel/process.c:555
 context_switch kernel/sched/core.c:5246 [inline]
 __schedule+0xdb4/0x1a6c kernel/sched/core.c:6563
 schedule+0xc4/0x170 kernel/sched/core.c:6639
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6698
 __mutex_lock_common+0xb20/0x1f3c kernel/locking/mutex.c:679
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
 write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
 nfsctl_transaction_write+0x114/0x164 fs/nfsd/nfsctl.c:114
 vfs_write+0x2a8/0x7c8 fs/read_write.c:582
 ksys_write+0x12c/0x228 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:646
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
INFO: task syz.0.17:4526 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.17        state:D stack:0     pid:4526  ppid:4432   flags:0x00000001
Call trace:
 __switch_to+0x2f4/0x550 arch/arm64/kernel/process.c:555
 context_switch kernel/sched/core.c:5246 [inline]
 __schedule+0xdb4/0x1a6c kernel/sched/core.c:6563
 schedule+0xc4/0x170 kernel/sched/core.c:6639
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6698
 __mutex_lock_common+0xb20/0x1f3c kernel/locking/mutex.c:679
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
 write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
 nfsctl_transaction_write+0x114/0x164 fs/nfsd/nfsctl.c:114
 vfs_write+0x2a8/0x7c8 fs/read_write.c:582
 ksys_write+0x12c/0x228 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:646
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

Showing all locks held in the system:
2 locks held by kworker/u4:1/11:
 #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x69c/0x13bc kernel/workqueue.c:-1
 #1: ffff80001cb67c40 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x6e8/0x13bc kernel/workqueue.c:2267
1 lock held by rcu_tasks_kthre/12:
 #0: ffff800015567db0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xc48 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
 #0: ffff8000155685d0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xc48 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/28:
 #0: ffff800015567440 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349
3 locks held by kworker/u4:3/536:
2 locks held by getty/4084:
 #0: ffff0000d6a6b098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff800020a3e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2e8/0xfa8 drivers/tty/n_tty.c:2198
3 locks held by kworker/1:7/4433:
 #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x69c/0x13bc kernel/workqueue.c:-1
 #1: ffff800021147c40 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x6e8/0x13bc kernel/workqueue.c:2267
 #2: ffff0000f92e1240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x1d8/0x2708 drivers/net/netdevsim/fib.c:1491
3 locks held by kworker/1:9/4442:
 #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x69c/0x13bc kernel/workqueue.c:-1
 #1: ffff8000215b7c40 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x6e8/0x13bc kernel/workqueue.c:2267
 #2: ffff0000f2065240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x1d8/0x2708 drivers/net/netdevsim/fib.c:1491
2 locks held by syz.1.18/4494:
 #0: ffff0000d44a4460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.2.19/4523:
 #0: ffff0000dde3a460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.3.20/4524:
 #0: 
ffff0000cd766460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.4.21/4525:
 #0: ffff0000c457a460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.0.17/4526:
 #0: ffff0000cdc0c460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.5.22/4550:
 #0: ffff0000d6ac8460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.7.24/4620:
 #0: ffff0000de9f0460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.6.23/4621:
 #0: ffff0000d2dc0460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.9.26/4642:
 #0: ffff0000f1ea2460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.8.25/4643:
 #0: ffff0000dedb4460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.1.27/4662:
 #0: ffff0000df0fe460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.2.28/4707:
 #0: ffff0000cd7da460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.0.30/4719:
 #0: ffff0000f8482460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.3.29/4720:
 #0: ffff0000d35d2460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.4.31/4728:
 #0: ffff0000f8fac460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.5.32/4751:
 #0: ffff0000db81c460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.6.33/4810:
 #0: ffff0000cc1ac460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.7.34/4829:
 #0: ffff0000ce628460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.8.35/4854:
 #0: ffff0000ff250460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.9.36/4855:
 #0: ffff0000dfe44460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.1.37/4860:
 #0: ffff0000f04b6460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.2.38/4875:
 #0: ffff0000eb22a460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.0.39/4898:
 #0: ffff000101736460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.3.40/4923:
 #0: ffff000103d40460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.4.41/4936:
 #0: ffff0000d2502460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.5.42/4947:
 #0: ffff0000d192e460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (
nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.6.43/4978:
 #0: ffff0000f58be460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.7.44/5013:
 #0: ffff0000cafa6460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.8.45/5025:
 #0: ffff000101ff2460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.1.47/5049:
 #0: ffff0000f6a62460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.9.46/5060:
 #0: ffff0000c3a04460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.2.48/5075:
 #0: ffff0000fd14a460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.0.49/5112:
 #0: ffff00010d09a460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.3.50/5118:
 #0: 
ffff00010d734460
 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.4.51/5138:
 #0: ffff0000db89c460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.5.52/5147:
 #0: ffff0000ca408460 (sb_writers#12
){.+.+}-{0:0}
, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: 
ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.6.53/5171:
 #0: ffff0000eb36c460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.7.54/5221:
 #0: ffff0000f2160460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: 
ffff8000157f4168
 (
nfsd_mutex
){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.8.55/5228:
 #0: ffff0000f3ca2460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.1.56/5243:
 #0: ffff000101cfa460 (
sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.9.57/5254:
 #0: ffff00010735e460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
2 locks held by syz.2.58/5268:
 #0: 
ffff00010a8d2460
 (
sb_writers
#12
){.+.+}-{0:0}
, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #1: ffff8000157f4168 (nfsd_mutex){+.+.}-{3:3}, at: write_ports+0xbc/0x9f0 fs/nfsd/nfsctl.c:846
3 locks held by syz-executor/5271:
1 lock held by syz-executor/5275:
 #0: ffff800017a15a08 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline]
 #0: ffff800017a15a08 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x64c/0xcc4 net/core/rtnetlink.c:6163

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