EXT4-fs warning (device loop1): ext4_da_update_reserve_space:372: ext4_da_update_reserve_space: ino 18, used 1 with only 0 reserved data blocks
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WARNING: CPU: 0 PID: 4175 at fs/ext4/inode.c:373 ext4_da_update_reserve_space+0x333/0x620 fs/ext4/inode.c:369
Modules linked in:
CPU: 0 PID: 4175 Comm: kworker/u4:6 Not tainted 6.1.34-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Workqueue: writeback wb_workfn (flush-7:1)
RIP: 0010:ext4_da_update_reserve_space+0x333/0x620 fs/ext4/inode.c:373
Code: 00 4c 89 ff 48 c7 c6 2e c9 71 8b ba 74 01 00 00 48 c7 c1 00 f6 fd 89 49 c7 c0 2e c9 71 8b 53 41 55 e8 e1 a5 0c 00 48 83 c4 10 <0f> 0b 49 bf 00 00 00 00 00 fc ff df 43 0f b6 04 3c 84 c0 0f 85 9c
RSP: 0018:ffffc90004cceda8 EFLAGS: 00010282
RAX: 7621e08cf7cf6700 RBX: 0000000000000000 RCX: 7621e08cf7cf6700
RDX: dffffc0000000000 RSI: ffffffff89eb7c20 RDI: 0000000000000001
RBP: ffff8880749fb518 R08: dffffc0000000000 R09: fffffbfff1e0145d
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1100e93f751
R13: 0000000000000001 R14: ffff88806b2e4000 R15: ffff88806b2e6000
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2d6bf01718 CR3: 0000000075fac000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_map_blocks+0x824/0x1810 fs/ext4/inode.c:672
 mpage_map_one_extent fs/ext4/inode.c:2420 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2473 [inline]
 ext4_writepages+0x1683/0x3620 fs/ext4/inode.c:2841
 do_writepages+0x33c/0x5d0 mm/page-writeback.c:2469
 __writeback_single_inode+0xfb/0xc70 fs/fs-writeback.c:1590
 writeback_sb_inodes+0x893/0x1620 fs/fs-writeback.c:1881
 wb_writeback+0x3b8/0xa80 fs/fs-writeback.c:2055
 wb_do_writeback fs/fs-writeback.c:2198 [inline]
 wb_workfn+0x3da/0xe40 fs/fs-writeback.c:2238
 process_one_work+0x7be/0xf30 kernel/workqueue.c:2289
 worker_thread+0x8c5/0xfc0 kernel/workqueue.c:2436
 kthread+0x230/0x2b0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>