------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2624!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 81 Comm: kworker/u8:4 Not tainted 6.15.0-rc5-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025
Workqueue: writeback wb_workfn (flush-7:3)
RIP: 0010:ext4_do_writepages+0x3e47/0x3e50 fs/ext4/inode.c:2623
Code: c1 0f 8c 23 fd ff ff 4c 89 e7 e8 c4 d1 b0 ff e9 16 fd ff ff e8 fa 02 51 ff 90 0f 0b e8 f2 02 51 ff 90 0f 0b e8 ea 02 51 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:ffffc9000159ece0 EFLAGS: 00010293
RAX: ffffffff826ecc76 RBX: 0000004210000000 RCX: ffff88801cb45a00
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc9000159f0d0 R08: ffff888063b827f7 R09: 1ffff1100c7704fe
R10: dffffc0000000000 R11: ffffed100c7704ff R12: ffffc9000159f540
R13: ffffc9000159f120 R14: 0000004000000000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8881260fd000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005610da6be950 CR3: 0000000060c5a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_writepages+0x203/0x350 fs/ext4/inode.c:2829
 do_writepages+0x3ae/0x7b0 mm/page-writeback.c:2656
 __writeback_single_inode+0x145/0xff0 fs/fs-writeback.c:1680
 writeback_sb_inodes+0x6b5/0x1000 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:3238 [inline]
 process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 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+0x3e47/0x3e50 fs/ext4/inode.c:2623
Code: c1 0f 8c 23 fd ff ff 4c 89 e7 e8 c4 d1 b0 ff e9 16 fd ff ff e8 fa 02 51 ff 90 0f 0b e8 f2 02 51 ff 90 0f 0b e8 ea 02 51 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:ffffc9000159ece0 EFLAGS: 00010293
RAX: ffffffff826ecc76 RBX: 0000004210000000 RCX: ffff88801cb45a00
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc9000159f0d0 R08: ffff888063b827f7 R09: 1ffff1100c7704fe
R10: dffffc0000000000 R11: ffffed100c7704ff R12: ffffc9000159f540
R13: ffffc9000159f120 R14: 0000004000000000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8881260fd000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005610da6be950 CR3: 000000000dd36000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400