INFO: task syz.1.311:8470 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.311       state:D stack:24696 pid:8470  tgid:8468  ppid:7800   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x1821/0x5740
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x6d9/0x940
 down_read+0x99/0x2e0
 super_lock+0x2d6/0x3d0
 user_get_super+0xc8/0x120
 __se_sys_quotactl+0x540/0x9e0
 do_syscall_64+0x15f/0x560
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdb4c39ce59
RSP: 002b:00007fdb4a5d5028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007fdb4c616090 RCX: 00007fdb4c39ce59
RDX: 0000000000000000 RSI: 0000200000000180 RDI: ffffffff80000900
RBP: 00007fdb4c432d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdb4c616128 R14: 00007fdb4c616090 R15: 00007ffd2cfb04c8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e95cce0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5438:
 #0: ffff88811053c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900034732e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0
2 locks held by syz-executor/5824:
1 lock held by syz.1.311/8470:
 #0: ffff88816a8bc0d8 (&type->s_umount_key#54){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.3.393/9174:
 #0: ffff88816a8bc0d8 (&type->s_umount_key#54){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
2 locks held by syz.6.517/10342:
 #0: ffff88816b498410 (sb_writers#3){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x160
 #1: ffff88816a8bc0d8 (&type->s_umount_key#54){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.4.690/11580:
 #0: ffff88816a8bc0d8 (&type->s_umount_key#54){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.8.747/11907:
 #0: ffff88816a8bc0d8 (&type->s_umount_key#54){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.1.765/12066:
 #0: ffff88816a8bc0d8 (&type->s_umount_key#54){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
2 locks held by syz-executor/12240:
 #0: ffff88811361a0d8 (&type->s_umount_key#64){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8e962fe8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2d0/0x770
2 locks held by syz.6.810/12606:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0xfd3/0x1030
 kthread+0x389/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 12240 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:kasan_check_range+0x0/0x2c0
Code: fe 90 0f 0b 48 89 df 48 c7 c6 00 24 22 8e e8 b7 2c f7 fe 90 0f 0b cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <0f> 1f 40 d6 55 41 57 41 56 41 55 41 54 53 b0 01 48 85 f6 0f 84 ae
RSP: 0018:ffffc90005b171f0 EFLAGS: 00000246
RAX: 1ffff92000b62e64 RBX: 0000000000000010 RCX: ffffffff8176f0e3
RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffffc90005b17338
RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff8e95cce0
R10: ffffc90005b17338 R11: ffffffff81b0e030 R12: ffffc90005b176f8
R13: 1ffff92000b62e5f R14: ffffc90005b17338 R15: ffffc90005b17330
FS:  000055555a903500(0000) GS:ffff88818dc87000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557c5d9a68 CR3: 00000001141ee000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 __asan_memset+0x22/0x50
 unwind_next_frame+0xf33/0x2550
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kmem_cache_free+0x182/0x650
 free_buffer_head+0x55/0x220
 try_to_free_buffers+0x25b/0x300
 block_invalidate_folio+0x5f8/0x730
 truncate_cleanup_folio+0xcb/0x190
 truncate_inode_pages_range+0x2ce/0xe30
 blkdev_flush_mapping+0x109/0x2f0
 bdev_release+0x417/0x650
 blkdev_release+0x15/0x20
 __fput+0x44f/0xa60
 task_work_run+0x1d9/0x270
 exit_to_user_mode_loop+0xf3/0x4d0
 do_syscall_64+0x33e/0x560
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2e3a79e097
Code: a2 c7 05 5c 06 25 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffe69a9c768 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f2e3a8321ca RCX: 00007f2e3a79e097
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe69a9c820
RBP: 00007ffe69a9c820 R08: 00007ffe69a9d820 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe69a9d8b0
R13: 00007f2e3a8321ca R14: 000000000004edb5 R15: 00007ffe69a9d8f0
 </TASK>
