INFO: task syz-executor.2:9631 blocked for more than 143 seconds.
      Not tainted 6.8.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D stack:28920 pid:9631  tgid:9627  ppid:5093   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0x177f/0x49a0 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
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a3/0xd70 kernel/locking/mutex.c:752
 __fdget_pos+0x258/0x320 fs/file.c:1191
 fdget_pos include/linux/file.h:74 [inline]
 __do_sys_getdents fs/readdir.c:322 [inline]
 __se_sys_getdents+0x1c3/0x4d0 fs/readdir.c:311
 do_syscall_64+0xf9/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f570607dda9
RSP: 002b:00007f5706e8e0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000004e
RAX: ffffffffffffffda RBX: 00007f57061ac050 RCX: 00007f570607dda9
RDX: 00000000000000aa RSI: 0000000020000280 RDI: 0000000000000006
RBP: 00007f57060ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f57061ac050 R15: 00007ffd8a23c658
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/29:
 #0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
 #0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
 #0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by getty/4816:
 #0: ffff88802a74d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
1 lock held by syz-executor.0/5088:
 #0: ffff888081d240e0 (&type->s_umount_key#51){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
 #0: ffff888081d240e0 (&type->s_umount_key#51){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
 #0: ffff888081d240e0 (&type->s_umount_key#51){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:504
4 locks held by kworker/u4:0/7325:
3 locks held by syz-executor.2/9628:
1 lock held by syz-executor.2/9631:
 #0: ffff88802af594c8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x258/0x320 fs/file.c:1191
3 locks held by syz-executor.4/9956:
1 lock held by syz-executor.4/9957:
 #0: ffff888035da3248 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x258/0x320 fs/file.c:1191
3 locks held by syz-executor.1/11124:
1 lock held by syz-executor.1/11126:
 #0: ffff888024faad48 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x258/0x320 fs/file.c:1191
3 locks held by syz-executor.3/11403:
1 lock held by syz-executor.3/11413:
 #0: ffff88803508efc8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x258/0x320 fs/file.c:1191
1 lock held by syz-executor.1/11448:
4 locks held by syz-executor.4/11447:

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

NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
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:243
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 9956 Comm: syz-executor.4 Not tainted 6.8.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
RIP: 0010:kasan_check_range+0xc/0x290 mm/kasan/generic.c:188
Code: 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 55 41 57 41 56 41 54 53 <b0> 01 48 85 f6 0f 84 a0 01 00 00 4c 8d 04 37 49 39 f8 0f 82 56 02
RSP: 0018:ffffc90009717640 EFLAGS: 00000246
RAX: ffffffff8214b92e RBX: ffff888038784ee0 RCX: ffffffff8214b93f
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff888038784ee0
RBP: 1ffff920012e2f28 R08: ffffffff82724897 R09: 1ffff110070f09d0
R10: dffffc0000000000 R11: ffffed10070f09d1 R12: dffffc0000000000
R13: 0000000000000005 R14: ffff888038784e80 R15: ffffc90009717940
FS:  00007fdc285746c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c013389000 CR3: 0000000066a98000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
 __brelse+0x1f/0xa0 fs/buffer.c:1231
 brelse include/linux/buffer_head.h:309 [inline]
 __exfat_ent_get fs/exfat/fatent.c:58 [inline]
 exfat_ent_get+0x1d7/0x400 fs/exfat/fatent.c:97
 exfat_readdir fs/exfat/dir.c:187 [inline]
 exfat_iterate+0x1376/0x33e0 fs/exfat/dir.c:261
 wrap_directory_iterator+0x94/0xe0 fs/readdir.c:67
 iterate_dir+0x539/0x6f0 fs/readdir.c:110
 __do_sys_getdents fs/readdir.c:326 [inline]
 __se_sys_getdents+0x1ef/0x4d0 fs/readdir.c:311
 do_syscall_64+0xf9/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7fdc2787dda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fdc285740c8 EFLAGS: 00000246 ORIG_RAX: 000000000000004e
RAX: ffffffffffffffda RBX: 00007fdc279abf80 RCX: 00007fdc2787dda9
RDX: 00000000000000b6 RSI: 0000000020000080 RDI: 0000000000000006
RBP: 00007fdc278ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fdc279abf80 R15: 00007ffd53ba8b48
 </TASK>