INFO: task syz-executor311:4275 blocked for more than 143 seconds.
      Not tainted 5.19.0-syzkaller-02858-ge2b542100719 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor311 state:D stack:27752 pid: 4275 ppid:  3644 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5178 [inline]
 __schedule+0xa00/0x4c10 kernel/sched/core.c:6490
 schedule+0xda/0x1b0 kernel/sched/core.c:6566
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common+0x378/0x530 kernel/sched/completion.c:106
 __flush_work+0x56c/0xb10 kernel/workqueue.c:3075
 __cancel_work_timer+0x3f9/0x570 kernel/workqueue.c:3162
 p9_conn_destroy net/9p/trans_fd.c:889 [inline]
 p9_fd_close+0x305/0x520 net/9p/trans_fd.c:919
 p9_client_destroy+0xbe/0x370 net/9p/client.c:1089
 v9fs_session_close+0x45/0x2d0 fs/9p/v9fs.c:504
 v9fs_kill_super+0x49/0x90 fs/9p/vfs_super.c:226
 deactivate_locked_super+0x94/0x160 fs/super.c:332
 v9fs_mount+0x69f/0xa80 fs/9p/vfs_super.c:207
 legacy_get_tree+0x105/0x220 fs/fs_context.c:610
 vfs_get_tree+0x89/0x2f0 fs/super.c:1497
 do_new_mount fs/namespace.c:3040 [inline]
 path_mount+0x1320/0x1fa0 fs/namespace.c:3370
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount fs/namespace.c:3568 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fb6e5b929c9
RSP: 002b:00007fb6e5b1b2f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb6e5b929c9
RDX: 0000000020000b80 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007fb6e5c144b8 R08: 0000000020000300 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb6e5c144b0
R13: 00007fb6e5c144bc R14: 00007fb6e5be1298 R15: 0030656c69662f2e
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
 #0: ffffffff8bd83cb0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
 #0: ffffffff8bd839b0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
2 locks held by kworker/1:1/26:
 #0: ffff888011867d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888011867d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888011867d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff888011867d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
 #0: ffff888011867d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
 #0: ffff888011867d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
 #1: ffffc90000c2fda8 ((work_completion)(&m->wq)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
1 lock held by khungtaskd/28:
 #0: ffffffff8bd84800 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6492
1 lock held by syslogd/2951:
2 locks held by getty/3281:
 #0: ffff88814ad72098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
 #1: ffffc90001c282e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xe50/0x13c0 drivers/tty/n_tty.c:2124

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

NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 5.19.0-syzkaller-02858-ge2b542100719 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
 watchdog+0xc1d/0xf50 kernel/hung_task.c:369
 kthread+0x2e9/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 18249 Comm: syz-executor311 Not tainted 5.19.0-syzkaller-02858-ge2b542100719 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
RIP: 0010:dequeue_task_fair+0x2b1/0xea0 kernel/sched/fair.c:5841
Code: 41 29 5f 1c 49 8d bf 98 01 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 74 08 3c 03 0f 8e db 09 00 00 45 8b 87 98 01 00 00 <b8> 01 00 00 00 45 85 c0 0f 4f d8 0f 1f 44 00 00 4c 89 f8 48 c1 e8
RSP: 0018:ffffc90005377aa8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 1ffff11017347565 RDI: ffff8880b9a3a258
RBP: ffff88807c0c0080 R08: 0000000000000000 R09: ffffffff8dbb6917
R10: fffffbfff1b76d22 R11: 0000000000000001 R12: 0000000000000009
R13: ffff88807c0c0100 R14: dffffc0000000000 R15: ffff8880b9a3a0c0
FS:  0000555556085300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001000 CR3: 0000000022bb7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 deactivate_task kernel/sched/core.c:2100 [inline]
 __schedule+0xbbe/0x4c10 kernel/sched/core.c:6444
 schedule+0xda/0x1b0 kernel/sched/core.c:6566
 freezable_schedule include/linux/freezer.h:172 [inline]
 do_nanosleep+0x24e/0x690 kernel/time/hrtimer.c:2044
 hrtimer_nanosleep+0x1f9/0x4a0 kernel/time/hrtimer.c:2097
 common_nsleep+0xa2/0xc0 kernel/time/posix-timers.c:1236
 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1276 [inline]
 __se_sys_clock_nanosleep kernel/time/posix-timers.c:1254 [inline]
 __x64_sys_clock_nanosleep+0x2f4/0x430 kernel/time/posix-timers.c:1254
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fb6e5bb6011
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 ba dc ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 f3 dc ff ff 48 8b 04 24 eb 97 66 2e 0f 1f
RSP: 002b:00007ffd8213d230 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 0000000000000031 RCX: 00007fb6e5bb6011
RDX: 00007ffd8213d270 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffd8213d330 R08: 0000000000000000 R09: 00007ffd8216f080
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 00007fb6e5c144bc R14: 00007ffd8213d2d0 R15: 00007fb6e5b47690
 </TASK>