------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2761!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 334 Comm: kworker/u4:3 Tainted: G        W          syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: writeback wb_workfn (flush-7:2)
RIP: 0010:ext4_writepages+0x2ff8/0x3020 fs/ext4/inode.c:2760
Code: 7c 86 ff 84 db 75 31 e8 b6 79 86 ff 49 bc 00 00 00 00 00 fc ff df 4c 8b 7c 24 18 4c 8b 6c 24 38 e9 a2 f7 ff ff e8 98 79 86 ff <0f> 0b e8 91 79 86 ff e8 b8 c9 16 ff eb 93 e8 85 79 86 ff e8 ac c9
RSP: 0018:ffffc9000de6f120 EFLAGS: 00010293
RAX: ffffffff81e9b0e8 RBX: 000000c41000c000 RCX: ffff8881104e2880
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc9000de6f490 R08: dffffc0000000000 R09: ffffed10230b0e57
R10: ffffed10230b0e57 R11: 1ffff110230b0e56 R12: dffffc0000000000
R13: ffff8881185873c8 R14: 0000008000000000 R15: ffff8881185872b0
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc63105de8 CR3: 00000001140a9000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_writepages+0x3a9/0x5e0 mm/page-writeback.c:2494
 __writeback_single_inode+0xc6/0xad0 fs/fs-writeback.c:1622
 writeback_sb_inodes+0x9b8/0x1550 fs/fs-writeback.c:1913
 wb_writeback+0x3f1/0x980 fs/fs-writeback.c:2089
 wb_do_writeback fs/fs-writeback.c:2236 [inline]
 wb_workfn+0x350/0xda0 fs/fs-writeback.c:2276
 process_one_work+0x71f/0xc40 kernel/workqueue.c:2302
 worker_thread+0xa29/0x11f0 kernel/workqueue.c:2449
 kthread+0x281/0x320 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_writepages+0x2ff8/0x3020 fs/ext4/inode.c:2760
Code: 7c 86 ff 84 db 75 31 e8 b6 79 86 ff 49 bc 00 00 00 00 00 fc ff df 4c 8b 7c 24 18 4c 8b 6c 24 38 e9 a2 f7 ff ff e8 98 79 86 ff <0f> 0b e8 91 79 86 ff e8 b8 c9 16 ff eb 93 e8 85 79 86 ff e8 ac c9
RSP: 0018:ffffc9000de6f120 EFLAGS: 00010293
RAX: ffffffff81e9b0e8 RBX: 000000c41000c000 RCX: ffff8881104e2880
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc9000de6f490 R08: dffffc0000000000 R09: ffffed10230b0e57
R10: ffffed10230b0e57 R11: 1ffff110230b0e56 R12: dffffc0000000000
R13: ffff8881185873c8 R14: 0000008000000000 R15: ffff8881185872b0
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000556cb0e3cb58 CR3: 000000010f735000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400