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WARNING: fs/ext4/inode.c:5691 at ext4_write_inode+0x545/0x620 fs/ext4/inode.c:5691, CPU#0: kswapd0/78
Modules linked in:
CPU: 0 UID: 0 PID: 78 Comm: kswapd0 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:ext4_write_inode+0x545/0x620 fs/ext4/inode.c:5691
Code: 8b 05 ff dd 04 10 48 3b 44 24 30 75 5a 44 89 e0 48 83 c4 38 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 1c 25 45 ff 90 <0f> 0b 90 eb cf e8 11 25 45 ff 41 bc fb ff ff ff eb c2 e8 04 25 45
RSP: 0018:ffffc9000102ee20 EFLAGS: 00010293
RAX: ffffffff827be244 RBX: 0000000000000800 RCX: ffff88801c6fc980
RDX: 0000000000000000 RSI: 0000000000000800 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff8f824677 R09: 1ffffffff1f048ce
R10: dffffc0000000000 R11: ffffffff827bdd00 R12: 0000000000000000
R13: ffffc9000102ef60 R14: ffff888046a11f78 R15: ffff88801c6fc980
FS:  0000000000000000(0000) GS:ffff88808d414000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc4b6701920 CR3: 000000003fb02000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 write_inode fs/fs-writeback.c:1582 [inline][   85.715214][ T4682] Bluetooth: hci0: command tx timeout
 __writeback_single_inode+0x7e1/0x1240 fs/fs-writeback.c:1802[   85.715214][ T4682] Bluetooth: hci0: command tx timeout