------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2827!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 8003 Comm: kworker/u8:22 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/10/2026
Workqueue: writeback wb_workfn (flush-7:5)
RIP: 0010:ext4_do_writepages+0x479b/0x47a0 fs/ext4/inode.c:2826
Code: c6 20 cc 04 8c e8 85 f2 9c fe 90 0f 0b e8 3d 46 3b ff 4c 89 f7 48 c7 c6 00 d1 04 8c e8 6e f2 9c fe 90 0f 0b e8 26 46 3b ff 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f
RSP: 0018:ffffc900057e6d00 EFLAGS: 00010293
RAX: ffffffff828b2c1a RBX: 0000006210000000 RCX: ffff888031c00000
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc900057e7110 R08: ffff8880527df0d7 R09: 1ffff1100a4fbe1a
R10: dffffc0000000000 R11: ffffed100a4fbe1b R12: ffffc900057e74c0
R13: 1ffff92000afce98 R14: 0000004000000000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff888125059000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc1901cfa8 CR3: 000000007d6a0000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 ext4_writepages+0x241/0x3b0 fs/ext4/inode.c:3043
 do_writepages+0x338/0x560 mm/page-writeback.c:2571
 __writeback_single_inode+0x12e/0xf90 fs/fs-writeback.c:1787
 writeback_sb_inodes+0x9de/0x1b00 fs/fs-writeback.c:2079
 wb_writeback+0x41c/0xad0 fs/fs-writeback.c:2264
 wb_do_writeback fs/fs-writeback.c:2432 [inline]
 wb_workfn+0x431/0x10f0 fs/fs-writeback.c:2477
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486
 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+0x479b/0x47a0 fs/ext4/inode.c:2826
Code: c6 20 cc 04 8c e8 85 f2 9c fe 90 0f 0b e8 3d 46 3b ff 4c 89 f7 48 c7 c6 00 d1 04 8c e8 6e f2 9c fe 90 0f 0b e8 26 46 3b ff 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f
RSP: 0018:ffffc900057e6d00 EFLAGS: 00010293
RAX: ffffffff828b2c1a RBX: 0000006210000000 RCX: ffff888031c00000
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc900057e7110 R08: ffff8880527df0d7 R09: 1ffff1100a4fbe1a
R10: dffffc0000000000 R11: ffffed100a4fbe1b R12: ffffc900057e74c0
R13: 1ffff92000afce98 R14: 0000004000000000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff888124f59000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fde16698000 CR3: 000000005829a000 CR4: 0000000000350ef0