------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2810!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 78 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 01/24/2026
Workqueue: writeback wb_workfn (flush-7:9)
RIP: 0010:ext4_do_writepages+0x45f4/0x4600 fs/ext4/inode.c:2809
Code: c6 40 ca c3 8b e8 fc 9e a6 fe 90 0f 0b e8 44 09 43 ff 4c 89 f7 48 c7 c6 20 cf c3 8b e8 e5 9e a6 fe 90 0f 0b e8 2d 09 43 ff 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000211ecc0 EFLAGS: 00010293
RAX: ffffffff828170f3 RBX: 0000004210000000 RCX: ffff88801bf9bd00
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc9000211f0d0 R08: ffff888076dcd6f7 R09: 1ffff1100edb9ade
R10: dffffc0000000000 R11: ffffed100edb9adf R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff110053784c7
FS:  0000000000000000(0000) GS:ffff8881257f3000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdbf614da08 CR3: 00000000a5560000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 ext4_writepages+0x241/0x3b0 fs/ext4/inode.c:3026
 do_writepages+0x32e/0x550 mm/page-writeback.c:2598
 __writeback_single_inode+0x133/0x1230 fs/fs-writeback.c:1737
 writeback_sb_inodes+0x92e/0x1940 fs/fs-writeback.c:2030
 wb_writeback+0x445/0xad0 fs/fs-writeback.c:2216
 wb_do_writeback fs/fs-writeback.c:2363 [inline]
 wb_workfn+0x3f8/0xef0 fs/fs-writeback.c:2403
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340
 worker_thread+0xda6/0x1360 kernel/workqueue.c:3421
 kthread+0x726/0x8b0 kernel/kthread.c:463
 ret_from_fork+0x51b/0xa40 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+0x45f4/0x4600 fs/ext4/inode.c:2809
Code: c6 40 ca c3 8b e8 fc 9e a6 fe 90 0f 0b e8 44 09 43 ff 4c 89 f7 48 c7 c6 20 cf c3 8b e8 e5 9e a6 fe 90 0f 0b e8 2d 09 43 ff 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000211ecc0 EFLAGS: 00010293
RAX: ffffffff828170f3 RBX: 0000004210000000 RCX: ffff88801bf9bd00
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc9000211f0d0 R08: ffff888076dcd6f7 R09: 1ffff1100edb9ade
R10: dffffc0000000000 R11: ffffed100edb9adf R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff110053784c7
FS:  0000000000000000(0000) GS:ffff8881256f3000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5633b50000 CR3: 000000007d39c000 CR4: 0000000000350ef0