=====================================
WARNING: bad unlock balance detected!
6.11.0-rc1-syzkaller-00334-ga5dbd76a8942 #0 Not tainted
-------------------------------------
syz.0.1/5304 is trying to release lock (&sb->s_type->i_mutex_key) at:
[<ffffffff83d4a98f>] btrfs_direct_write+0x91f/0xb40 fs/btrfs/direct-io.c:920
but there are no more locks to release!

other info that might help us debug this:
2 locks held by syz.0.1/5304:
 #0: ffff88801fe62ac8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x310 fs/file.c:1191
 #1: ffff88807bb54420 (sb_writers#12){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2876 [inline]
 #1: ffff88807bb54420 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x227/0xc90 fs/read_write.c:586

stack backtrace:
CPU: 1 UID: 0 PID: 5304 Comm: syz.0.1 Not tainted 6.11.0-rc1-syzkaller-00334-ga5dbd76a8942 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
 print_unlock_imbalance_bug+0x256/0x2c0 kernel/locking/lockdep.c:5199
 __lock_release kernel/locking/lockdep.c:5436 [inline]
 lock_release+0x5cb/0xa30 kernel/locking/lockdep.c:5780
 up_write+0x79/0x590 kernel/locking/rwsem.c:1631
 btrfs_direct_write+0x91f/0xb40 fs/btrfs/direct-io.c:920
 btrfs_do_write_iter+0x2a1/0x760 fs/btrfs/file.c:1505
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0xa72/0xc90 fs/read_write.c:590
 ksys_write+0x1a0/0x2c0 fs/read_write.c:643
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fab479779f9
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:00007fab473ff048 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fab47b05f80 RCX: 00007fab479779f9
RDX: 0000000000182000 RSI: 0000000020000000 RDI: 0000000000000006
RBP: 00007fab479e58ee R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fab47b05f80 R15: 00007ffefe2c8558
 </TASK>
------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff88805d580d20, owner = 0x0, curr 0xffff888028e61e00, list empty
WARNING: CPU: 1 PID: 5304 at kernel/locking/rwsem.c:1370 __up_write kernel/locking/rwsem.c:1369 [inline]
WARNING: CPU: 1 PID: 5304 at kernel/locking/rwsem.c:1370 up_write+0x502/0x590 kernel/locking/rwsem.c:1632
Modules linked in:
CPU: 1 UID: 0 PID: 5304 Comm: syz.0.1 Not tainted 6.11.0-rc1-syzkaller-00334-ga5dbd76a8942 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:__up_write kernel/locking/rwsem.c:1369 [inline]
RIP: 0010:up_write+0x502/0x590 kernel/locking/rwsem.c:1632
Code: c7 c7 a0 c8 ea 8b 48 c7 c6 20 cb ea 8b 48 8b 54 24 28 48 8b 4c 24 18 4d 89 e0 4c 8b 4c 24 30 53 e8 83 9b e6 ff 48 83 c4 08 90 <0f> 0b 90 90 e9 6a fd ff ff 48 c7 c1 00 c6 f6 8f 80 e1 07 80 c1 03
RSP: 0018:ffffc900043c7920 EFLAGS: 00010292
RAX: be1dba80d61bf700 RBX: ffffffff8beac980 RCX: 0000000000040000
RDX: ffffc90004429000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc900043c79f0 R08: ffffffff8155a1e2 R09: 1ffffffff1fed2b5
R10: dffffc0000000000 R11: fffffbfff1fed2b6 R12: 0000000000000000
R13: ffff88805d580d20 R14: 1ffff92000878f2c R15: dffffc0000000000
FS:  00007fab473ff6c0(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f708b5cc000 CR3: 000000002dfc8000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 btrfs_direct_write+0x91f/0xb40 fs/btrfs/direct-io.c:920
 btrfs_do_write_iter+0x2a1/0x760 fs/btrfs/file.c:1505
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0xa72/0xc90 fs/read_write.c:590
 ksys_write+0x1a0/0x2c0 fs/read_write.c:643
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fab479779f9
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:00007fab473ff048 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fab47b05f80 RCX: 00007fab479779f9
RDX: 0000000000182000 RSI: 0000000020000000 RDI: 0000000000000006
RBP: 00007fab479e58ee R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fab47b05f80 R15: 00007ffefe2c8558
 </TASK>