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(1)
WARNING: CPU: 0 PID: 5321 at kernel/locking/lockdep.c:238 hlock_class kernel/locking/lockdep.c:238 [inline]
WARNING: CPU: 0 PID: 5321 at kernel/locking/lockdep.c:238 check_wait_context kernel/locking/lockdep.c:4854 [inline]
WARNING: CPU: 0 PID: 5321 at kernel/locking/lockdep.c:238 __lock_acquire+0x379/0xd20 kernel/locking/lockdep.c:5187
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:hlock_class kernel/locking/lockdep.c:238 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4854 [inline]
RIP: 0010:__lock_acquire+0x379/0xd20 kernel/locking/lockdep.c:5187
Code: eb 33 90 e8 39 88 ea 02 85 c0 74 22 83 3d e2 eb df 0d 00 75 19 90 48 c7 c7 04 79 8f 8d 48 c7 c6 50 10 7f 8d e8 e8 c6 e5 ff 90 <0f> 0b 90 90 90 31 c0 48 8b 3c 24 0f b6 98 c4 00 00 00 41 8b 46 20
RSP: 0018:ffffc9000d54f270 EFLAGS: 00010046
RAX: 1736ef7624456400 RBX: ffff88805187c0d8 RCX: 0000000000100000
RDX: ffffc9000dfba000 RSI: 0000000000001d6a RDI: 0000000000001d6b
RBP: 0000000000000baa R08: ffff88801fe24293 R09: 1ffff11003fc4852
R10: dffffc0000000000 R11: ffffed1003fc4853 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888000b78bd0 R15: ffff888000b78b30
FS:  00007f2bff3c06c0(0000) GS:ffff88808d72d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f96eba14000 CR3: 000000003e21b000 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:4255
 generic_file_write_iter+0x117/0x550 mm/filemap.c:4398
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x5c9/0xb30 fs/read_write.c:686
 ksys_write+0x145/0x250 fs/read_write.c:738
 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: 0033:0x7f2bfe58f7c9
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:00007f2bff3c0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f2bfe7e5fa0 RCX: 00007f2bfe58f7c9
RDX: 0000000000001006 RSI: 0000200000002100 RDI: 0000000000000004
RBP: 00007f2bfe613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2bfe7e6038 R14: 00007f2bfe7e5fa0 R15: 00007ffc205812f8
 </TASK>