INFO: task syz.7.1303:13269 blocked for more than 143 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.1303      state:D stack:24392 pid:13269 tgid:13268 ppid:11834  task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17d9/0x56c0
 schedule+0x164/0x2b0
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x87d/0x1080
 down_write+0x1bc/0x200
 super_lock+0x289/0x3d0
 user_get_super+0xc8/0x120
 __se_sys_quotactl+0x538/0x9a0
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f758859e0d9
RSP: 002b:00007f7589552028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f7588825fa0 RCX: 00007f758859e0d9
RDX: 0000000000000000 RSI: 0000200000000000 RDI: ffffffff80000302
RBP: 00007f7588635024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7588826038 R14: 00007f7588825fa0 R15: 00007ffc48cb3098
 </TASK>

Showing all locks held in the system:
2 locks held by kworker/u8:0/12:
5 locks held by kworker/u10:0/27:
1 lock held by khungtaskd/34:
 #0: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5423:
 #0: ffff88810f8830a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900034762e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360
2 locks held by syz-executor/6727:
1 lock held by syz.7.1303/13269:
 #0: ffff88810a1640d8 (&type->s_umount_key#65){++++}-{4:4}, at: super_lock+0x289/0x3d0
1 lock held by syz-executor/14150:
3 locks held by syz.5.1905/16512:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 34 Comm: khungtaskd Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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/0x380
 sys_info+0x135/0x170
 watchdog+0xfd7/0x1030
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 16512 Comm: syz.5.1905 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__lock_acquire+0x220c/0x2e50
Code: 0e 48 c7 c6 09 fb 34 8e 67 48 0f b9 3a 90 31 c0 48 8b 3c 24 48 8b 74 24 08 48 83 c0 30 48 39 c3 0f 84 72 f2 ff ff 4c 8b 7b 10 <48> 8b 46 f8 25 ff 1f 00 00 48 0f a3 05 13 43 d1 12 0f 82 5c ff ff
RSP: 0018:ffffc90006d06c90 EFLAGS: 00000006
RAX: ffffffff94158880 RBX: ffffffff970868f8 RCX: 0000000000000003
RDX: 0000000000030000 RSI: ffff88816db44910 RDI: ffff88816db43c00
RBP: b2586a6db5c13d5c R08: 0000000000000000 R09: 0000000000000020
R10: 0000000000000000 R11: ffffffff81a30f00 R12: 00000000000000e7
R13: 0000000000000009 R14: ffff88816db44910 R15: ffffffff941a5e98
FS:  00007fba77c4f6c0(0000) GS:ffff8882a8f5c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34813ff8 CR3: 0000000176c12000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 lock_acquire+0x115/0x350
 fs_reclaim_acquire+0x98/0x100
 bdev_getblk+0x62/0x6e0
 ocfs2_read_blocks+0x572/0x14d0
 ocfs2_search_chain+0x2ad/0x1e50
 ocfs2_claim_suballoc_bits+0x901/0x1f40
 ocfs2_claim_new_inode+0x37b/0x820
 ocfs2_mknod_locked+0x10e/0x290
 ocfs2_mknod+0x13d7/0x2240
 vfs_mknod+0x441/0x600
 filename_mknodat+0x3cb/0x660
 __se_sys_mknodat+0x3b/0x150
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fba76d9e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fba77c4f028 EFLAGS: 00000246 ORIG_RAX: 0000000000000103
RAX: ffffffffffffffda RBX: 00007fba77025fa0 RCX: 00007fba76d9e0d9
RDX: 0000000000001000 RSI: 0000200000000080 RDI: ffffffffffffff9c
RBP: 00007fba76e35024 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000070a R11: 0000000000000246 R12: 0000000000000000
R13: 00007fba77026038 R14: 00007fba77025fa0 R15: 00007fff6cf4dd18
 </TASK>
