------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2816!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 6244 Comm: kworker/u8:13 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: writeback wb_workfn (flush-7:3)
RIP: 0010:ext4_do_writepages+0x4768/0x4770 fs/ext4/inode.c:2815
Code: c6 20 65 05 8c e8 c8 91 99 fe 90 0f 0b e8 80 06 39 ff 4c 89 f7 48 c7 c6 00 6a 05 8c e8 b1 91 99 fe 90 0f 0b e8 69 06 39 ff 90 <0f> 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90008bc6ce0 EFLAGS: 00010293
RAX: ffffffff828e8f87 RBX: 0000004210000000 RCX: ffff8880766e0000
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc90008bc70f0 R08: ffff888053dc2da7 R09: 1ffff1100a7b85b4
R10: dffffc0000000000 R11: ffffed100a7b85b5 R12: ffff888055f0f4d0
R13: dffffc0000000000 R14: 0000004000000000 R15: ffff888053dc2f90
FS:  0000000000000000(0000) GS:ffff888124f0d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffeaea22f40 CR3: 000000007465c000 CR4: 00000000003526f0
DR0: 0000000000000008 DR1: 0000000000000002 DR2: 0000000000000404
DR3: ffffffffefffff14 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_writepages+0x241/0x3b0 fs/ext4/inode.c:3032
 do_writepages+0x338/0x560 mm/page-writeback.c:2560
 __writeback_single_inode+0x136/0x1220 fs/fs-writeback.c:1788
 writeback_sb_inodes+0x9de/0x1b00 fs/fs-writeback.c:2099
 wb_writeback+0x41c/0xad0 fs/fs-writeback.c:2284
 wb_do_writeback fs/fs-writeback.c:2452 [inline]
 wb_workfn+0x431/0x10f0 fs/fs-writeback.c:2497
 process_one_work kernel/workqueue.c:3375 [inline]
 process_scheduled_works+0xc4e/0x1630 kernel/workqueue.c:3458
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3539
 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+0x4768/0x4770 fs/ext4/inode.c:2815
Code: c6 20 65 05 8c e8 c8 91 99 fe 90 0f 0b e8 80 06 39 ff 4c 89 f7 48 c7 c6 00 6a 05 8c e8 b1 91 99 fe 90 0f 0b e8 69 06 39 ff 90 <0f> 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90008bc6ce0 EFLAGS: 00010293
RAX: ffffffff828e8f87 RBX: 0000004210000000 RCX: ffff8880766e0000
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc90008bc70f0 R08: ffff888053dc2da7 R09: 1ffff1100a7b85b4
R10: dffffc0000000000 R11: ffffed100a7b85b5 R12: ffff888055f0f4d0
R13: dffffc0000000000 R14: 0000004000000000 R15: ffff888053dc2f90
FS:  0000000000000000(0000) GS:ffff88812500d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d218ff8 CR3: 000000007ead6000 CR4: 00000000003526f0
DR0: 0000000000000008 DR1: 0000000000000002 DR2: 0000000000000404
DR3: ffffffffefffff14 DR6: 00000000ffff0ff0 DR7: 0000000000000400