nfs4: Unknown parameter 'iocharset'
INFO: task syz-executor.6:9391 blocked for more than 143 seconds.
      Not tainted 5.10.105 #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.6  state:D stack:27952 pid: 9391 ppid:   289 flags:0x00000004
Call Trace:
 context_switch kernel/sched/core.c:3791 [inline]
 __schedule+0x848/0x1e80 kernel/sched/core.c:4540
 schedule+0xcb/0x270 kernel/sched/core.c:4618
 schedule_preempt_disabled+0xc/0x20 kernel/sched/core.c:4677
 __mutex_lock_common kernel/locking/mutex.c:1047 [inline]
 __mutex_lock+0x7c9/0x1250 kernel/locking/mutex.c:1109
 perf_event_init_context kernel/events/core.c:12870 [inline]
 perf_event_init_task+0x252/0x800 kernel/events/core.c:12945
 copy_process+0x1721/0x66f0 kernel/fork.c:2079
 kernel_clone+0xe7/0xa20 kernel/fork.c:2466
 __do_sys_clone+0xc8/0x110 kernel/fork.c:2583
 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fac89197f41
RSP: 002b:00007fff2b9ac6d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fac866a9700 RCX: 00007fac89197f41
RDX: 00007fac866a99d0 RSI: 00007fac866a92f0 RDI: 00000000003d0f00
RBP: 00007fff2b9ac910 R08: 00007fac866a9700 R09: 00007fac866a9700
R10: 00007fac866a99d0 R11: 0000000000000206 R12: 00007fff2b9ac78e
R13: 00007fff2b9ac78f R14: 00007fac866a9300 R15: 0000000000022000
INFO: task syz-executor.6:9400 blocked for more than 143 seconds.
      Not tainted 5.10.105 #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.6  state:D stack:29496 pid: 9400 ppid:   289 flags:0x00004004
Call Trace:
 context_switch kernel/sched/core.c:3791 [inline]
 __schedule+0x848/0x1e80 kernel/sched/core.c:4540
 schedule+0xcb/0x270 kernel/sched/core.c:4618
 schedule_preempt_disabled+0xc/0x20 kernel/sched/core.c:4677
 __mutex_lock_common kernel/locking/mutex.c:1047 [inline]
 __mutex_lock+0x7c9/0x1250 kernel/locking/mutex.c:1109
 mutex_lock_double kernel/events/core.c:11661 [inline]
 __perf_event_ctx_lock_double kernel/events/core.c:11720 [inline]
 __do_sys_perf_event_open+0x1244/0x2d00 kernel/events/core.c:11990
 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fac89196b19
RSP: 002b:00007fac866eb188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fac892aa020 RCX: 00007fac89196b19
RDX: 0000000000000000 RSI: 00000000000001f7 RDI: 0000000020000000
RBP: 00007fac891f0f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff2b9ac78f R14: 00007fac866eb300 R15: 0000000000022000

Showing all locks held in the system:
1 lock held by khungtaskd/22:
 #0: ffffffff84df6e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x269 kernel/locking/lockdep.c:6379
1 lock held by in:imklog/177:
2 locks held by rs:main Q:Reg/178:
 #0: ffff88800cd06d70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:974
 #1: ffff88800f860438 (sb_writers#3){.+.+}-{0:0}, at: ksys_write+0x12d/0x250 fs/read_write.c:658
2 locks held by agetty/218:
 #0: ffff8880181f2098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:266
 #1: ffffc900007c52e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xdca/0x1320 drivers/tty/n_tty.c:2172
1 lock held by syz-executor.6/9391:
 #0: ffff88800f1e7cb0 (&ctx->mutex){+.+.}-{3:3}, at: perf_event_init_context kernel/events/core.c:12870 [inline]
 #0: ffff88800f1e7cb0 (&ctx->mutex){+.+.}-{3:3}, at: perf_event_init_task+0x252/0x800 kernel/events/core.c:12945
3 locks held by syz-executor.6/9400:
 #0: ffff8880448d12d8 (&sig->exec_update_lock){++++}-{3:3}, at: __do_sys_perf_event_open+0xfc1/0x2d00 kernel/events/core.c:11972
 #1: ffff88800f1e7cb0 (&ctx->mutex){+.+.}-{3:3}, at: mutex_lock_double kernel/events/core.c:11660 [inline]
 #1: ffff88800f1e7cb0 (&ctx->mutex){+.+.}-{3:3}, at: __perf_event_ctx_lock_double kernel/events/core.c:11720 [inline]
 #1: ffff88800f1e7cb0 (&ctx->mutex){+.+.}-{3:3}, at: __do_sys_perf_event_open+0x1237/0x2d00 kernel/events/core.c:11990
 #2: ffff88800f1e7cb0 (&ctx->mutex/1){+.+.}-{3:3}, at: mutex_lock_double kernel/events/core.c:11661 [inline]
 #2: ffff88800f1e7cb0 (&ctx->mutex/1){+.+.}-{3:3}, at: __perf_event_ctx_lock_double kernel/events/core.c:11720 [inline]
 #2: ffff88800f1e7cb0 (&ctx->mutex/1){+.+.}-{3:3}, at: __do_sys_perf_event_open+0x1244/0x2d00 kernel/events/core.c:11990

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