------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2810!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 243 Comm: kworker/u8:6 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-7:5)
RIP: 0010:ext4_do_writepages+0x44fe/0x4500 fs/ext4/inode.c:2809
Code: c6 80 2a 9f 8b e8 22 c7 ad fe 90 0f 0b e8 2a 7a 46 ff 4c 89 f7 48 c7 c6 60 2e 9f 8b e8 0b c7 ad fe 90 0f 0b e8 13 7a 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:ffffc90002f06da0 EFLAGS: 00010293
RAX: ffffffff827a41bd RBX: 0000004210000000 RCX: ffff88801ef43c80
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc90002f071b0 R08: ffff888054a31d37 R09: 1ffff1100a9463a6
R10: dffffc0000000000 R11: ffffed100a9463a7 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff1100f277cc7
FS:  0000000000000000(0000) GS:ffff888125c0a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fec7b006000 CR3: 000000007806c000 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+0x133/0x1240 fs/fs-writeback.c:1737
 writeback_sb_inodes+0x93a/0x1870 fs/fs-writeback.c:2030
 wb_writeback+0x42b/0xaa0 fs/fs-writeback.c:2216
 wb_do_writeback fs/fs-writeback.c:2363 [inline]
 wb_workfn+0x3f9/0xed0 fs/fs-writeback.c:2403
 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 80 2a 9f 8b e8 22 c7 ad fe 90 0f 0b e8 2a 7a 46 ff 4c 89 f7 48 c7 c6 60 2e 9f 8b e8 0b c7 ad fe 90 0f 0b e8 13 7a 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:ffffc90002f06da0 EFLAGS: 00010293
RAX: ffffffff827a41bd RBX: 0000004210000000 RCX: ffff88801ef43c80
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc90002f071b0 R08: ffff888054a31d37 R09: 1ffff1100a9463a6
R10: dffffc0000000000 R11: ffffed100a9463a7 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff1100f277cc7
FS:  0000000000000000(0000) GS:ffff888125d0a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f44fd251766 CR3: 000000007806c000 CR4: 00000000003526f0