INFO: task syz.9.142:7325 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.9.142       state:D stack:15048 pid:7325  tgid:7324  ppid:7118   task_flags:0x440140 flags:0x00004006
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 __closure_sync+0x163/0x220
 __bch2_write+0x31ef/0x3900
 bch2_writepages+0x211/0x2d0
 do_writepages+0x32e/0x550
 filemap_write_and_wait_range+0x21f/0x320
 bchfs_truncate+0x6a3/0xc20
 notify_change+0xb36/0xe40
 do_truncate+0x1a4/0x220
 vfs_truncate+0x493/0x520
 do_sys_truncate+0xdb/0x190
 __x64_sys_truncate+0x5b/0x70
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc2be98ebe9
RSP: 002b:00007fc2bf759038 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007fc2bebb5fa0 RCX: 00007fc2be98ebe9
RDX: 0000000000000000 RSI: 00000000000006e8 RDI: 0000200000000a80
RBP: 00007fc2bea11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc2bebb6038 R14: 00007fc2bebb5fa0 R15: 00007ffd8cf625c8
 </TASK>
INFO: task syz.0.249:8771 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.249       state:D stack:28936 pid:8771  tgid:8770  ppid:7735   task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 io_schedule+0x80/0xd0
 folio_wait_bit_common+0x6b0/0xb90
 folio_wait_writeback+0xb0/0x100
 __filemap_fdatawait_range+0x147/0x230
 filemap_fdatawait_keep_errors+0x31/0xd0
 sync_inodes_sb+0x7a9/0xa10
 __iterate_supers+0x13d/0x290
 ksys_sync+0x94/0x150
 __ia32_sys_sync+0xe/0x20
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcc1fd8ebe9
RSP: 002b:00007fcc20ca2038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007fcc1ffb5fa0 RCX: 00007fcc1fd8ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fcc1ffb5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcc1ffb6038 R14: 00007fcc1ffb5fa0 R15: 00007fff74408508
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/35:
 #0: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5673:
 #0: ffff888021a3f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029062f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
2 locks held by syz.9.142/7325:
 #0: ffff888120594428 (sb_writers#19){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff88802a73a740 (&sb->s_type->i_mutex_key#25){++++}-{4:4}, at: do_truncate+0x171/0x220
2 locks held by syz-executor/8296:
2 locks held by syz.0.249/8771:
 #0: ffff8881205940e0 (&type->s_umount_key#63){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
 #1: ffff888120594950 (&s->s_sync_lock){+.+.}-{4:4}, at: sync_inodes_sb+0x255/0xa10
3 locks held by syz-executor/10545:

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

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+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 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: 5773 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:restore_fpregs_from_fpstate+0x86/0x150
Code: 0f ae 6b 40 5b 41 5c 41 5e 41 5f c3 cc cc cc cc cc f3 0f 1e fa e8 4a 63 57 00 eb ae f3 0f 1e fa e8 3f 63 57 00 48 0f ae 4b 40 <eb> d8 f3 0f 1e fa e8 2f 63 57 00 eb 8d f3 0f 1e fa e8 24 63 57 00
RSP: 0018:ffffc90003187e80 EFLAGS: 00000093
RAX: ffffffff81684851 RBX: ffff8880232dd300 RCX: ffff8880232db980
RDX: 0000000000000000 RSI: 00000000000e1cff RDI: ffff8880232dd300
RBP: 0000000000000000 R08: ffff8880232db987 R09: 1ffff1100465b730
R10: dffffc0000000000 R11: ffffed100465b731 R12: dffffc0000000000
R13: 1ffff1100465b735 R14: 00000000000e1cff R15: 0000000000000000
FS:  000055555bb00500(0000) GS:ffff8880b861b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558695c608 CR3: 0000000029442000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 switch_fpu_return+0x109/0x1e0
 arch_exit_to_user_mode_prepare+0x2c/0x50
 do_syscall_64+0x177/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f148adc1463
Code: 1f 84 00 00 00 00 00 83 ff 03 74 7b 83 ff 02 b8 fa ff ff ff 49 89 ca 0f 44 f8 80 3d fe 70 1c 00 00 74 14 b8 e6 00 00 00 0f 05 <f7> d8 c3 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec 28 48 89 54 24 10
RSP: 002b:00007ffc54788f18 EFLAGS: 00000202 ORIG_RAX: 00000000000000e6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f148adc1463
RDX: 00007ffc54788f30 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 00000000173ed49c R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc54789380
R13: 0000000000000004 R14: 00007ffc54788f6c R15: 00007ffc54789000
 </TASK>
