------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2808!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 6878 Comm: kworker/u8:14 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: writeback wb_workfn (flush-7:4)
RIP: 0010:ext4_do_writepages+0x2bc6/0x3cf0 fs/ext4/inode.c:2808
Code: ad 10 ff ff ff 48 c1 ea 03 80 3c 02 00 0f 84 23 e9 ff ff 48 8b bd 28 ff ff ff e8 c5 98 a8 ff e9 12 e9 ff ff e8 1b 33 43 ff 90 <0f> 0b e8 13 33 43 ff 90 0f 0b 90 e9 0d e6 ff ff e8 05 33 43 ff 90
RSP: 0018:ffffc9001d2cf2c0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888012606980 RCX: ffffffff82783da0
RDX: ffff8880237c5a00 RSI: ffffffff82785835 RDI: 0000000000000007
RBP: ffffc9001d2cf490 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc9001d2cf4e8
R13: 0000000000000001 R14: ffff888012606bc8 R15: 0000000004208060
FS:  0000000000000000(0000) GS:ffff8881247bc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff3d110e98 CR3: 000000007e050000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 ext4_writepages+0x37a/0x7d0 fs/ext4/inode.c:3025
 do_writepages+0x27a/0x600 mm/page-writeback.c:2634
 __writeback_single_inode+0x160/0xfb0 fs/fs-writeback.c:1680
 writeback_sb_inodes+0x60d/0xfa0 fs/fs-writeback.c:1976
 wb_writeback+0x419/0xb70 fs/fs-writeback.c:2156
 wb_do_writeback fs/fs-writeback.c:2303 [inline]
 wb_workfn+0x14d/0xbe0 fs/fs-writeback.c:2343
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
 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+0x2bc6/0x3cf0 fs/ext4/inode.c:2808
Code: ad 10 ff ff ff 48 c1 ea 03 80 3c 02 00 0f 84 23 e9 ff ff 48 8b bd 28 ff ff ff e8 c5 98 a8 ff e9 12 e9 ff ff e8 1b 33 43 ff 90 <0f> 0b e8 13 33 43 ff 90 0f 0b 90 e9 0d e6 ff ff e8 05 33 43 ff 90
RSP: 0018:ffffc9001d2cf2c0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888012606980 RCX: ffffffff82783da0
RDX: ffff8880237c5a00 RSI: ffffffff82785835 RDI: 0000000000000007
RBP: ffffc9001d2cf490 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc9001d2cf4e8
R13: 0000000000000001 R14: ffff888012606bc8 R15: 0000000004208060
FS:  0000000000000000(0000) GS:ffff8881247bc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0773f6a000 CR3: 0000000030dce000 CR4: 0000000000350ef0