INFO: task syz.3.296:8472 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.296       state:D stack:27064 pid:8472  tgid:8469  ppid:7503   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x14ef/0x4fb0
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x61e/0x920
 down_read+0x99/0x2e0
 super_lock+0x2d6/0x3d0
 __iterate_supers+0x126/0x290
 ksys_sync+0xa0/0x170
 __ia32_sys_sync+0xe/0x20
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f64c759acb9
RSP: 002b:00007f64c83e0028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f64c7816090 RCX: 00007f64c759acb9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f64c7816090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f64c7816128 R14: 00007f64c7816090 R15: 00007fffbd2574c8
 </TASK>
INFO: task syz.1.316:8570 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.316       state:D stack:27864 pid:8570  tgid:8569  ppid:8342   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x14ef/0x4fb0
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x61e/0x920
 down_read+0x99/0x2e0
 super_lock+0x2d6/0x3d0
 user_get_super+0xc8/0x120
 __se_sys_quotactl+0x516/0x990
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1c0839acb9
RSP: 002b:00007f1c065f6028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f1c08615fa0 RCX: 00007f1c0839acb9
RDX: 0000000000000000 RSI: 0000200000000280 RDI: ffffffff80000701
RBP: 00007f1c08408bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000300 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1c08616038 R14: 00007f1c08615fa0 R15: 00007ffe5561ad28
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/35:
 #0: ffffffff8e341b60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5664:
 #0: ffff888112b780a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000356e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13c0
2 locks held by syz-executor/5837:
3 locks held by syz-executor/7277:
1 lock held by syz.3.296/8472:
 #0: ffff888112e000e0 (&type->s_umount_key#52){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.1.316/8570:
 #0: ffff888112e000e0 (&type->s_umount_key#52){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.7.541/10386:
 #0: ffff888112e000e0 (&type->s_umount_key#52){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.0.593/10991:
 #0: ffff888112e000e0 (&type->s_umount_key#52){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.0.593/10993:
 #0: ffff888112e000e0 (&type->s_umount_key#52){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.1.645/11442:
 #0: ffff888112e000e0 (&type->s_umount_key#52){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
2 locks held by syz.3.650/11471:
2 locks held by syz.3.650/11472:
 #0: ffff8881a4b2c8f8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x246/0x320
 #1: ffff888116d4b010 (&sb->s_type->i_mutex_key#15){+.+.}-{4:4}, at: shmem_file_llseek+0x9e/0x180
1 lock held by syz.3.650/11473:
 #0: ffff888116d4b010 (&sb->s_type->i_mutex_key#15){+.+.}-{4:4}, at: process_measurement+0x452/0x1cb0

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 35 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+0xf90/0xfe0
 kthread+0x726/0x8b0
 ret_from_fork+0x51b/0xa40
 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: 11471 Comm: syz.3.650 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:stack_trace_consume_entry+0xef/0x280
Code: 4c 89 ff 48 8b 74 24 08 48 8b 1f 45 8d 79 01 0f b6 44 15 00 84 c0 0f 85 3a 01 00 00 45 89 38 4e 8d 3c cb 4c 89 f8 48 c1 e8 03 <80> 3c 10 00 74 1a 4c 89 ff 48 89 f3 49 89 d4 4c 89 c5 e8 5a 3b 7b
RSP: 0018:ffffc90005687258 EFLAGS: 00000a06
RAX: 1ffff92000ad0e88 RBX: ffffc90005687420 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: ffffffff822655c9 RDI: ffffc90005687360
RBP: 1ffff92000ad0e6e R08: ffffc90005687370 R09: 0000000000000004
R10: ffffc900056872f8 R11: ffffffff81ae4a90 R12: 0000000000000000
R13: 1ffff92000ad0e6d R14: ffffc90005687368 R15: ffffc90005687440
FS:  00007f01f91eb6c0(0000) GS:ffff88818e40b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555590a72a28 CR3: 000000010c660000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 arch_stack_walk+0x10f/0x150
 stack_trace_save+0xa9/0x100
 save_stack+0x122/0x230
 __set_page_owner+0x8d/0x4c0
 post_alloc_hook+0x228/0x280
 get_page_from_freelist+0x24dc/0x2580
 __alloc_frozen_pages_noprof+0x18d/0x380
 alloc_pages_mpol+0x232/0x4a0
 folio_alloc_mpol_noprof+0x39/0x70
 shmem_alloc_and_add_folio+0x445/0xf80
 shmem_get_folio_gfp+0x5a9/0x1670
 shmem_fallocate+0x96f/0xec0
 vfs_fallocate+0x669/0x7e0
 __x64_sys_fallocate+0xc0/0x110
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f01f839acb9
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:00007f01f91eb028 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f01f8615fa0 RCX: 00007f01f839acb9
RDX: 0000000000000a20 RSI: 0000000000000000 RDI: 0000000000000008
RBP: 00007f01f8408bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000008000c65 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f01f8616038 R14: 00007f01f8615fa0 R15: 00007ffeb63de0a8
 </TASK>
