------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2816!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 71 Comm: kworker/u8:4 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: writeback wb_workfn (flush-7:4)
RIP: 0010:ext4_do_writepages+0x465f/0x4670 fs/ext4/inode.c:2815
Code: c6 a0 42 e4 8b e8 a1 9b a2 fe 90 0f 0b e8 a9 9b 40 ff 4c 89 f7 48 c7 c6 80 47 e4 8b e8 8a 9b a2 fe 90 0f 0b e8 92 9b 40 ff 90 <0f> 0b 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
RSP: 0018:ffffc9000204ed00 EFLAGS: 00010293
RAX: ffffffff828586ee RBX: 0000004210000000 RCX: ffff88801d340000
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc9000204f110 R08: ffff88804bed09c7 R09: 1ffff110097da138
R10: dffffc0000000000 R11: ffffed10097da139 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff1100ab5b4c5
FS:  0000000000000000(0000) GS:ffff88812553f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe2abbbe77c CR3: 000000002cb48000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ext4_writepages+0x241/0x3b0 fs/ext4/inode.c:3032
 do_writepages+0x32e/0x550 mm/page-writeback.c:2575
 __writeback_single_inode+0x133/0x10e0 fs/fs-writeback.c:1762
 writeback_sb_inodes+0x979/0x19d0 fs/fs-writeback.c:2054
 wb_writeback+0x445/0xb00 fs/fs-writeback.c:2239
 wb_do_writeback fs/fs-writeback.c:2386 [inline]
 wb_workfn+0x3f8/0xf10 fs/fs-writeback.c:2426
 process_one_work kernel/workqueue.c:3278 [inline]
 process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3361
 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3442
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 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+0x465f/0x4670 fs/ext4/inode.c:2815
Code: c6 a0 42 e4 8b e8 a1 9b a2 fe 90 0f 0b e8 a9 9b 40 ff 4c 89 f7 48 c7 c6 80 47 e4 8b e8 8a 9b a2 fe 90 0f 0b e8 92 9b 40 ff 90 <0f> 0b 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
RSP: 0018:ffffc9000204ed00 EFLAGS: 00010293
RAX: ffffffff828586ee RBX: 0000004210000000 RCX: ffff88801d340000
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc9000204f110 R08: ffff88804bed09c7 R09: 1ffff110097da138
R10: dffffc0000000000 R11: ffffed10097da139 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff1100ab5b4c5
FS:  0000000000000000(0000) GS:ffff88812543f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff7a6798000 CR3: 00000000753ae000 CR4: 00000000003526f0