loop0: detected capacity change from 0 to 32768
ERROR: (device loop0): xtSearch: xt_getpage: xtree page corrupt
ERROR: (device loop0): remounting filesystem as read-only
------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(!test_bit(class_idx, lock_classes_in_use))
WARNING: CPU: 0 PID: 5321 at kernel/locking/lockdep.c:5207 __lock_acquire+0xc0c/0xd20 kernel/locking/lockdep.c:5207
Modules linked in:
CPU: 0 UID: 0 PID: 5321 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__lock_acquire+0xc0c/0xd20 kernel/locking/lockdep.c:5207
Code: ff ff 90 e8 96 4d ea 02 85 c0 74 22 83 3d 4f c2 df 0d 00 75 19 90 48 c7 c7 2c 64 8f 8d 48 c7 c6 30 60 77 8d e8 55 be e5 ff 90 <0f> 0b 90 90 90 e9 8f 00 00 00 90 0f 0b 90 e9 8d fe ff ff 90 e8 5b
RSP: 0018:ffffc9000d387010 EFLAGS: 00010046
RAX: 0649490193e7f100 RBX: 0000000000000000 RCX: 0000000000100000
RDX: ffffc9000e0a2000 RSI: 00000000000024e0 RDI: 00000000000024e1
RBP: 00000000000001aa R08: ffff88801fe24293 R09: 1ffff11003fc4852
R10: dffffc0000000000 R11: ffffed1003fc4853 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888000803000 R15: 0000000000000000
FS:  00007fb9208026c0(0000) GS:ffff88808d730000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb9207b8000 CR3: 00000000420b7000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162
 __wake_up_common_lock+0x2f/0x1f0 kernel/sched/wait.c:124
 unlock_metapage fs/jfs/jfs_metapage.c:40 [inline]
 release_metapage+0x13c/0xac0 fs/jfs/jfs_metapage.c:871
 xtTruncate+0xe84/0x2e70 fs/jfs/jfs_xtree.c:-1
 jfs_truncate_nolock+0x2a7/0x340 fs/jfs/inode.c:381
 jfs_truncate fs/jfs/inode.c:420 [inline]
 jfs_write_failed+0x119/0x190 fs/jfs/inode.c:295
 jfs_write_begin+0x6f/0x80 fs/jfs/inode.c:308
 generic_perform_write+0x2c5/0x900 mm/filemap.c:4242
 generic_file_write_iter+0x117/0x550 mm/filemap.c:4385
 aio_write+0x535/0x7a0 fs/aio.c:1634
 __io_submit_one fs/aio.c:-1 [inline]
 io_submit_one+0x78b/0x1310 fs/aio.c:2053
 __do_sys_io_submit fs/aio.c:2112 [inline]
 __se_sys_io_submit+0x185/0x2f0 fs/aio.c:2082
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb91f98f6c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb920802038 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1
RAX: ffffffffffffffda RBX: 00007fb91fbe5fa0 RCX: 00007fb91f98f6c9
RDX: 0000200000000540 RSI: 0000000000000001 RDI: 00007fb9207b8000
RBP: 00007fb91fa11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb91fbe6038 R14: 00007fb91fbe5fa0 R15: 00007fff83707f38
 </TASK>