------------[ cut here ]------------
kernel BU[  234.063027][ T1409] kernel BUG at fs/ext4/inode.c:2813!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 1409 Comm: kworker/u8:11 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: writeback wb_workfn (flush-7:5)
RIP: 0010:ext4_do_writepages+0x46d9/0x46e0 fs/ext4/inode.c:2812
Code: c6 80 6f 63 8b e8 27 ba ab fe 90 0f 0b e8 2f 7e 48 ff 4c 89 f7 48 c7 c6 60 74 63 8b e8 10 ba ab fe 90 0f 0b e8 18 7e 48 ff 90 <0f> 0b 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900064f6d00 EFLAGS: 00010293
RAX: ffffffff827c0858 RBX: 0000004210000000 RCX: ffff8880292cbd00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900064f7110 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100c359303 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff110056facf3
FS:  0000000000000000(0000) GS:ffff888126335000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f468ea6a000 CR3: 0000000035eb8000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ext4_writepages+0x241/0x3b0 fs/ext4/inode.c:3029
 do_writepages+0x32e/0x550 mm/page-writeback.c:2554
 __writeback_single_inode+0x133/0x11a0 fs/fs-writeback.c:1762
 writeback_sb_inodes+0x995/0x19d0 fs/fs-writeback.c:2054
 wb_writeback+0x456/0xb70 fs/fs-writeback.c:2239
 wb_do_writeback fs/fs-writeback.c:2386 [inline]
 wb_workfn+0x41a/0xf60 fs/fs-writeback.c:2426
 process_one_work kernel/workqueue.c:3276 [inline]
 process_scheduled_works+0xb6e/0x18c0 kernel/workqueue.c:3359
 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3440
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x51e/0xb90 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+0x46d9/0x46e0 fs/ext4/inode.c:2812
Code: c6 80 6f 63 8b e8 27 ba ab fe 90 0f 0b e8 2f 7e 48 ff 4c 89 f7 48 c7 c6 60 74 63 8b e8 10 ba ab fe 90 0f 0b e8 18 7e 48 ff 90 <0f> 0b 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900064f6d00 EFLAGS: 00010293
RAX: ffffffff827c0858 RBX: 0000004210000000 RCX: ffff8880292cbd00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900064f7110 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100c359303 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff110056facf3
FS:  0000000000000000(0000) GS:ffff888126335000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f468ea6a000 CR3: 0000000035eb8000 CR4: 00000000003526f0