------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2810!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 4536 Comm: kworker/u8:14 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: writeback wb_workfn (flush-7:8)
RIP: 0010:ext4_do_writepages+0x44fe/0x4500 fs/ext4/inode.c:2809
Code: c6 40 28 9f 8b e8 02 c2 ad fe 90 0f 0b e8 fa 73 46 ff 4c 89 f7 48 c7 c6 20 2c 9f 8b e8 eb c1 ad fe 90 0f 0b e8 e3 73 46 ff 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6
RSP: 0018:ffffc9000d97eda0 EFLAGS: 00010293
RAX: ffffffff827a46dd RBX: 0000006210000000 RCX: ffff888033bb9e40
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc9000d97f1b0 R08: ffff888048a989f7 R09: 1ffff1100915313e
R10: dffffc0000000000 R11: ffffed100915313f R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff1100b8ea8c7
FS:  0000000000000000(0000) GS:ffff888125d07000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f85145db000 CR3: 0000000031d00000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ext4_writepages+0x203/0x350 fs/ext4/inode.c:3026
 do_writepages+0x32e/0x550 mm/page-writeback.c:2554
 __writeback_single_inode+0x133/0x1070 fs/fs-writeback.c:1750
 writeback_sb_inodes+0x93a/0x1870 fs/fs-writeback.c:2041
 wb_writeback+0x42b/0xaa0 fs/fs-writeback.c:2227
 wb_do_writeback fs/fs-writeback.c:2374 [inline]
 wb_workfn+0x3f9/0xed0 fs/fs-writeback.c:2414
 process_one_work+0x93a/0x15a0 kernel/workqueue.c:3279
 process_scheduled_works kernel/workqueue.c:3362 [inline]
 worker_thread+0x9b0/0xee0 kernel/workqueue.c:3443
 kthread+0x389/0x480 kernel/kthread.c:467
 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_do_writepages+0x44fe/0x4500 fs/ext4/inode.c:2809
Code: c6 40 28 9f 8b e8 02 c2 ad fe 90 0f 0b e8 fa 73 46 ff 4c 89 f7 48 c7 c6 20 2c 9f 8b e8 eb c1 ad fe 90 0f 0b e8 e3 73 46 ff 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6
RSP: 0018:ffffc9000d97eda0 EFLAGS: 00010293
RAX: ffffffff827a46dd RBX: 0000006210000000 RCX: ffff888033bb9e40
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc9000d97f1b0 R08: ffff888048a989f7 R09: 1ffff1100915313e
R10: dffffc0000000000 R11: ffffed100915313f R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff1100b8ea8c7
FS:  0000000000000000(0000) GS:ffff888125d07000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbbec972a60 CR3: 000000007e338000 CR4: 00000000003526f0