INFO: task syz-executor.0:25946 blocked for more than 143 seconds.
      Not tainted 6.8.0-rc5-syzkaller-00297-gf2e367d6ad3b #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:28760 pid:25946 tgid:25945 ppid:10256  flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0x17d1/0x49f0 kernel/sched/core.c:6727
 __schedule_loop kernel/sched/core.c:6802 [inline]
 schedule+0x149/0x260 kernel/sched/core.c:6817
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6874
 rwsem_down_read_slowpath kernel/locking/rwsem.c:1086 [inline]
 __down_read_common kernel/locking/rwsem.c:1250 [inline]
 __down_read kernel/locking/rwsem.c:1263 [inline]
 down_read+0x703/0xa40 kernel/locking/rwsem.c:1528
 __super_lock fs/super.c:58 [inline]
 super_lock+0x27c/0x400 fs/super.c:120
 super_lock_shared fs/super.c:139 [inline]
 iterate_supers+0x8c/0x190 fs/super.c:924
 ksys_sync+0xbd/0x1c0 fs/sync.c:102
 __do_sys_sync+0xe/0x20 fs/sync.c:113
 do_syscall_64+0xf9/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f99ea87dda9
RSP: 002b:00007f99eb6ca0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f99ea9abf80 RCX: 00007f99ea87dda9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f99ea8ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f99ea9abf80 R15: 00007f99eaacfa48
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/29:
 #0: ffffffff8e130c60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
 #0: ffffffff8e130c60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
 #0: ffffffff8e130c60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
4 locks held by kworker/u4:7/2450:
2 locks held by getty/4823:
 #0: ffff88802fe5a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
3 locks held by kworker/1:12/6034:
2 locks held by syz-executor.0/9986:
3 locks held by kworker/u4:25/19339:
 #0: ffff8880b943c958 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:567
 #1: ffff8880b9528988 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:988
 #2: ffff88803aa4bd70 (k-slock-AF_TIPC){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline]
 #2: ffff88803aa4bd70 (k-slock-AF_TIPC){+...}-{2:2}, at: release_sock+0x30/0x1f0 net/core/sock.c:3536
1 lock held by syz-executor.0/25946:
 #0: ffff88802e47c0e0 (&type->s_umount_key#69){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
 #0: ffff88802e47c0e0 (&type->s_umount_key#69){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
2 locks held by syz-executor.3/29706:
1 lock held by syz-executor.0/29714:

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

NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc5-syzkaller-00297-gf2e367d6ad3b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
 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:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xfaf/0xff0 kernel/hung_task.c:379
 kthread+0x2ef/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.8.0-rc5-syzkaller-00297-gf2e367d6ad3b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:put_prev_task_idle+0x0/0x10 kernel/sched/idle.c:440
Code: 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa e9 57 f1 f8 ff 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa c3 cc cc cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90
RSP: 0018:ffffffff8de07b38 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff8880b943c940 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffffffff8de94680 RDI: ffff8880b943c940
RBP: ffffffff8de07d48 R08: ffffffff8f85682f R09: 1ffffffff1f0ad05
R10: dffffc0000000000 R11: ffffffff816b5230 R12: ffffffff8dad8b30
R13: 0000000000000000 R14: ffffffff8de94dd0 R15: dffffc0000000001
FS:  0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002002d000 CR3: 000000002459e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 put_prev_task kernel/sched/sched.h:2326 [inline]
 put_prev_task_balance kernel/sched/core.c:6000 [inline]
 pick_next_task kernel/sched/core.c:6150 [inline]
 __schedule+0x2b47/0x49f0 kernel/sched/core.c:6691
 schedule_idle+0x52/0x90 kernel/sched/core.c:6843
 do_idle+0x569/0x5d0 kernel/sched/idle.c:340
 cpu_startup_entry+0x41/0x60 kernel/sched/idle.c:410
 rest_init+0x2e0/0x300 init/main.c:730
 arch_call_rest_init+0xe/0x10 init/main.c:827
 start_kernel+0x474/0x500 init/main.c:1072
 x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:555
 x86_64_start_kernel+0x99/0xa0 arch/x86/kernel/head64.c:536
 secondary_startup_64_no_verify+0x171/0x17b
 </TASK>