------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2815!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 1323 Comm: kworker/u8:7 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: writeback wb_workfn (flush-7:2)
RIP: 0010:ext4_do_writepages+0x465f/0x4670 fs/ext4/inode.c:2814
Code: c6 e0 4a e4 8b e8 d1 82 a2 fe 90 0f 0b e8 c9 85 40 ff 4c 89 f7 48 c7 c6 c0 4f e4 8b e8 ba 82 a2 fe 90 0f 0b e8 b2 85 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:ffffc90005efed00 EFLAGS: 00010293
RAX: ffffffff82859bde RBX: 0000004210000000 RCX: ffff888029210000
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc90005eff110 R08: ffff888056ad2717 R09: 1ffff1100ad5a4e2
R10: dffffc0000000000 R11: ffffed100ad5a4e3 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff1100a6874c5
FS:  0000000000000000(0000) GS:ffff88812525c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000d3d030 CR3: 000000002a73a000 CR4: 00000000003526f0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_writepages+0x241/0x3b0 fs/ext4/inode.c:3031
 do_writepages+0x32e/0x550 mm/page-writeback.c:2571
 __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:3302 [inline]
 process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3385
 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3466
 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:2814
Code: c6 e0 4a e4 8b e8 d1 82 a2 fe 90 0f 0b e8 c9 85 40 ff 4c 89 f7 48 c7 c6 c0 4f e4 8b e8 ba 82 a2 fe 90 0f 0b e8 b2 85 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:ffffc90005efed00 EFLAGS: 00010293
RAX: ffffffff82859bde RBX: 0000004210000000 RCX: ffff888029210000
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc90005eff110 R08: ffff888056ad2717 R09: 1ffff1100ad5a4e2
R10: dffffc0000000000 R11: ffffed100ad5a4e3 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff1100a6874c5
FS:  0000000000000000(0000) GS:ffff88812525c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000559b54dc2950 CR3: 000000007750e000 CR4: 00000000003526f0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400