------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2809!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 1112 Comm: kworker/u8:5 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:ext4_do_writepages+0x4607/0x4610 fs/ext4/inode.c:2808
Code: c6 40 84 be 8b e8 a9 96 b2 fe 90 0f 0b e8 21 52 4a ff 4c 89 f7 48 c7 c6 20 88 be 8b e8 92 96 b2 fe 90 0f 0b e8 0a 52 4a ff 90 <0f> 0b 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900039aeca0 EFLAGS: 00010293
RAX: ffffffff82756966 RBX: 0000004210000000 RCX: ffff888026fc5ac0
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc900039af0d0 R08: ffff88807f62f317 R09: 1ffff1100fec5e62
R10: dffffc0000000000 R11: ffffed100fec5e63 R12: 0000000000000001
R13: ffffc900039af120 R14: 0000004000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888125ae8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000034000 CR3: 000000007686e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ext4_writepages+0x205/0x350 fs/ext4/inode.c:3025
 do_writepages+0x32e/0x550 mm/page-writeback.c:2604
 __writeback_single_inode+0x145/0xff0 fs/fs-writeback.c:1680
 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:3263 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_do_writepages+0x4607/0x4610 fs/ext4/inode.c:2808
Code: c6 40 84 be 8b e8 a9 96 b2 fe 90 0f 0b e8 21 52 4a ff 4c 89 f7 48 c7 c6 20 88 be 8b e8 92 96 b2 fe 90 0f 0b e8 0a 52 4a ff 90 <0f> 0b 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900039aeca0 EFLAGS: 00010293
RAX: ffffffff82756966 RBX: 0000004210000000 RCX: ffff888026fc5ac0
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc900039af0d0 R08: ffff88807f62f317 R09: 1ffff1100fec5e62
R10: dffffc0000000000 R11: ffffed100fec5e63 R12: 0000000000000001
R13: ffffc900039af120 R14: 0000004000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881259e8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8d029ff000 CR3: 000000005ed1c000 CR4: 00000000003526f0