INFO: task syz-executor:5849 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:21832 pid:5849  tgid:5849  ppid:1      task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 io_schedule+0x80/0xd0
 folio_wait_bit_common+0x6b0/0xb90
 __filemap_get_folio+0x139/0xaf0
 truncate_inode_pages_range+0x3ed/0xda0
 evict+0x517/0x9c0
 evict_inodes+0x64c/0x6d0
 generic_shutdown_super+0x9a/0x2c0
 kill_block_super+0x44/0x90
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x425/0x4c0
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd94358fed7
RSP: 002b:00007fff85077508 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fd943611c05 RCX: 00007fd94358fed7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff850775c0
RBP: 00007fff850775c0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff85078650
R13: 00007fd943611c05 R14: 00000000000113a6 R15: 00007fff85078690
 </TASK>
INFO: task syz.2.21:6025 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.21        state:D stack:25128 pid:6025  tgid:6024  ppid:5852   task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x5fd/0x8f0
 down_read+0x98/0x2e0
 super_lock+0x2a9/0x3b0
 __iterate_supers+0x126/0x290
 __se_sys_quotactl+0x353/0x950
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe79898eba9
RSP: 002b:00007fe7998fd038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007fe798bd5fa0 RCX: 00007fe79898eba9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000102
RBP: 00007fe798a11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe798bd6038 R14: 00007fe798bd5fa0 R15: 00007ffef07f46b8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e13a0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5677:
 #0: ffff888106cb90a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029032f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
1 lock held by syz-executor/5849:
 #0: ffff88811a1ba0e0 (&type->s_umount_key#89){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
3 locks held by kworker/1:3/5853:
3 locks held by kworker/0:5/5918:
 #0: ffff88801a480d48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc900043a7bc0 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffff8881352e3240 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x26b/0x3180
1 lock held by syz.2.21/6025:
 #0: ffff88811a1ba0e0 (&type->s_umount_key#89){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.3.33/6129:
 #0: ffff88811a1ba0e0 (&type->s_umount_key#89){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.4.37/6189:
 #0: ffff88811a1ba0e0 (&type->s_umount_key#89){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.7.84/6632:
 #0: ffff88811a1ba0e0 (&type->s_umount_key#89){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.7.84/6638:
 #0: ffff88811a1ba0e0 (&type->s_umount_key#89){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.8.100/6756:
 #0: ffff88811a1ba0e0 (&type->s_umount_key#89){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.5.132/7043:
 #0: ffff88811a1ba0e0 (&type->s_umount_key#89){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.1.134/7102:
 #0: ffff88811a1ba0e0 (&type->s_umount_key#89){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.9.189/7432:
 #0: ffff88811a1ba0e0 (&type->s_umount_key#89){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.2.205/7468:
 #0: ffff88811a1ba0e0 (&type->s_umount_key#89){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.0.236/7549:
 #0: ffff88811a1ba0e0 (&type->s_umount_key#89){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.0.236/7550:
 #0: ffff88811a1ba0e0 (&type->s_umount_key#89){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.0.236/7551:
 #0: ffff88811a1ba0e0 (&type->s_umount_key#89){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.3.239/7582:
 #0: ffff88811a1ba0e0 (&type->s_umount_key#89){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.6.240/7643:
 #0: ffff88811a1ba0e0 (&type->s_umount_key#89){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.4.243/7723:
 #0: ffff88811a1ba0e0 (&type->s_umount_key#89){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz-executor/7871:
 #0: ffffffff8e13fb78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730
3 locks held by syz.8.288/7904:

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

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+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x439/0x7d0
 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: 5824 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:unwind_next_frame+0x1315/0x2390
Code: 83 e0 fe 4c 8d 3c 45 00 00 00 00 49 01 ef 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 27 49 63 07 <4c> 01 f8 49 8d 4f 04 4c 39 e0 48 0f 46 e9 49 8d 47 fc 48 0f 47 d8
RSP: 0018:ffffc900000077b8 EFLAGS: 00000246
RAX: fffffffff1f1e328 RBX: ffffffff8fba67c4 RCX: dffffc0000000000
RDX: ffffffff8fba67ac RSI: ffffffff9037dd50 RDI: ffffffff8be33e20
RBP: ffffffff8fba67ac R08: 0000000000000007 R09: ffffffff8172d195
R10: ffffc900000078d8 R11: ffffffff81ac4b00 R12: ffffffff81ac4aab
R13: ffffffff8fba67ac R14: ffffc90000007888 R15: ffffffff8fba67b8
FS:  0000555572449500(0000) GS:ffff8880b8615000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2c1ddff000 CR3: 000000001ec74000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5b/0x80
 kmem_cache_free+0x18f/0x400
 rcu_core+0xcab/0x1770
 handle_softirqs+0x286/0x870
 do_softirq+0xec/0x180
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x17d/0x1c0
 tcp_recvmsg+0x220/0x810
 inet_recvmsg+0x147/0x250
 sock_recvmsg+0x1a8/0x270
 sock_read_iter+0x231/0x2f0
 vfs_read+0x55a/0xa30
 ksys_read+0x145/0x250
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f78dbf8d57d
Code: a8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb b5 e8 a8 48 00 00 0f 1f 84 00 00 00 00 00 80 3d e1 af 21 00 00 74 17 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 5b c3 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec
RSP: 002b:00007ffd37a96a38 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f78dbf8d57d
RDX: 0000000000000004 RSI: 00007ffd37a96a4c RDI: 0000000000000003
RBP: 0000000000000000 R08: 000000001c8f4a39 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd37a96e60
R13: 0000000000000004 R14: 00007ffd37a96a4c R15: 00007ffd37a96ae0
 </TASK>
