------------[ cut here ]------------
WARNING: fs/buffer.c:1125 at __getblk_slow fs/buffer.c:1125 [inline], CPU#0: kworker/u8:26/15335
WARNING: fs/buffer.c:1125 at bdev_getblk+0x580/0x660 fs/buffer.c:1461, CPU#0: kworker/u8:26/15335
Modules linked in:
CPU: 0 UID: 0 PID: 15335 Comm: kworker/u8:26 Not tainted 6.16.0-rc4-next-20250704-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:__getblk_slow fs/buffer.c:1125 [inline]
RIP: 0010:bdev_getblk+0x580/0x660 fs/buffer.c:1461
Code: 26 fb ff ff e8 31 e3 78 ff 48 c7 c7 a0 fd 99 8b 48 c7 c6 b8 e6 9f 8d 4c 89 fa 4c 89 e9 e8 48 d0 e0 fe eb bd e8 11 e3 78 ff 90 <0f> 0b 90 48 b8 00 00 00 00 00 fc ff df 41 80 3c 07 00 74 08 48 89
RSP: 0018:ffffc9000539ef70 EFLAGS: 00010293
RAX: ffffffff8246cd6f RBX: ffff888148c0c518 RCX: ffff88807d1ebc00
RDX: 0000000000000000 RSI: 0000000000001000 RDI: 0000000000000000
RBP: 0000000000001000 R08: 0000000000000000 R09: ffffffff8216f9cd
R10: 0000000000000406 R11: 0000000000000000 R12: 0000000000000002
R13: ffff888148c0c500 R14: 0000000000001000 R15: 1ffff110291818a3
FS:  0000000000000000(0000) GS:ffff888125be7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f44b2516f98 CR3: 000000005a492000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000000e DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __getblk include/linux/buffer_head.h:380 [inline]
 sb_getblk include/linux/buffer_head.h:386 [inline]
 __ext4_get_inode_loc+0x561/0x1040 fs/ext4/inode.c:4796
 ext4_get_inode_loc fs/ext4/inode.c:4924 [inline]
 ext4_reserve_inode_write+0x18b/0x360 fs/ext4/inode.c:6243
 __ext4_mark_inode_dirty+0x15b/0x700 fs/ext4/inode.c:6421
 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6458
 __mark_inode_dirty+0x2d1/0xdf0 fs/fs-writeback.c:2527
 mark_inode_dirty_sync include/linux/fs.h:2605 [inline]
 __writeback_single_inode+0x3a1/0xff0 fs/fs-writeback.c:1705
 writeback_sb_inodes+0x6c7/0x1010 fs/fs-writeback.c:1976
 wb_writeback+0x43b/0xaf0 fs/fs-writeback.c:2156
 wb_do_writeback fs/fs-writeback.c:2303 [inline]
 wb_workfn+0x409/0xef0 fs/fs-writeback.c:2343
 process_one_work kernel/workqueue.c:3239 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3322
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3403
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>