INFO: task syz-executor.4:15002 blocked for more than 143 seconds.
      Not tainted 6.9.0-rc5-syzkaller-00007-g4d2008430ce8 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:26976 pid:15002 tgid:14999 ppid:12423  flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5409 [inline]
 __schedule+0xf15/0x5d00 kernel/sched/core.c:6746
 __schedule_loop kernel/sched/core.c:6823 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6838
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752
 exfat_sync_fs+0x6b/0x150 fs/exfat/super.c:53
 sync_fs_one_sb fs/sync.c:84 [inline]
 sync_fs_one_sb+0x10c/0x150 fs/sync.c:80
 iterate_supers+0xfb/0x240 fs/super.c:922
 ksys_sync+0xac/0x150 fs/sync.c:104
 __do_sys_sync+0xe/0x20 fs/sync.c:113
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f528ae7dea9
RSP: 002b:00007f528bc360c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f528afabf80 RCX: 00007f528ae7dea9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f528aeca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f528afabf80 R15: 00007fffd8ea5538
 </TASK>

Showing all locks held in the system:
2 locks held by kworker/u8:1/11:
1 lock held by khungtaskd/29:
 #0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
 #0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
 #0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by getty/4831:
 #0: ffff88802e7ea0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201
3 locks held by syz-executor.3/14336:
2 locks held by syz-executor.4/15002:
 #0: ffff88807c6b00e0 (&type->s_umount_key#106){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
 #0: ffff88807c6b00e0 (&type->s_umount_key#106){++++}-{3:3}, at: super_lock+0x31a/0x3f0 fs/super.c:120
 #1: ffff88807ce0e0e0 (&sbi->s_lock#2){+.+.}-{3:3}, at: exfat_sync_fs+0x6b/0x150 fs/exfat/super.c:53
3 locks held by kworker/u8:5/15660:
2 locks held by syz-executor.2/16438:
 #0: ffff88805fc12590 (&type->i_mutex_dir_key#19){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:805 [inline]
 #0: ffff88805fc12590 (&type->i_mutex_dir_key#19){++++}-{3:3}, at: open_last_lookups fs/namei.c:3565 [inline]
 #0: ffff88805fc12590 (&type->i_mutex_dir_key#19){++++}-{3:3}, at: path_openat+0x18ce/0x2990 fs/namei.c:3796
 #1: ffff88805fc12a58 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0xd2/0x110 fs/fuse/inode.c:554
2 locks held by syz-executor.1/16452:
 #0: ffffffff8f2ffec8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8f2ffec8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592
 #1: ffffffff8d7bc538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
 #1: ffffffff8d7bc538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x682/0x7a0 kernel/rcu/tree_exp.h:939
2 locks held by syz-executor.0/16453:
 #0: ffff88807b702c10 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:795 [inline]
 #0: ffff88807b702c10 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release+0x86/0x270 net/socket.c:658
 #1: ffffffff8d7bc538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline]
 #1: ffffffff8d7bc538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x403/0x7a0 kernel/rcu/tree_exp.h:939

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

NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.9.0-rc5-syzkaller-00007-g4d2008430ce8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
 watchdog+0xf86/0x1240 kernel/hung_task.c:380
 kthread+0x2c1/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 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:
NMI backtrace for cpu 1
CPU: 1 PID: 5413 Comm: syz-fuzzer Not tainted 6.9.0-rc5-syzkaller-00007-g4d2008430ce8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0033:0x471e1e
Code: 48 29 de e9 0d ff ff ff 8a 06 8a 4c 1e ff 88 07 88 4c 1f ff c3 c3 8b 06 89 07 c3 66 8b 06 8a 4e 02 66 89 07 88 4f 02 c3 8b 06 <8b> 4c 1e fc 89 07 89 4c 1f fc c3 48 8b 06 48 89 07 c3 48 8b 06 48
RSP: 002b:000000c000098938 EFLAGS: 00000293
RAX: 00000000bd4484fc RBX: 0000000000000005 RCX: 0000000000000005
RDX: 000000c00176f400 RSI: 000000c000958424 RDI: 000000c00102667b
RBP: 000000c0000989d8 R08: 00000000000008b2 R09: 000000c000958400
R10: 000000c0000b4d58 R11: 000000c000958424 R12: 0000000000088000
R13: 0000000000016680 R14: 000000c0000061a0 R15: 000000c001010000
FS:  000000c000efd090 GS:  0000000000000000
vkms_vblank_simulate: vblank timer overrun