kernel BUG at fs/ext4/inode.c:2747!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 409 Comm: kworker/u4:4 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: writeback wb_workfn (flush-7:5)
RIP: 0010:ext4_writepages+0x2f75/0x2f90 fs/ext4/inode.c:2746
Code: 00 00 00 e8 ad 7a 8f ff 84 db 75 2c e8 14 78 8f ff 49 bc 00 00 00 00 00 fc ff df 48 8b 5c 24 20 e9 d6 f7 ff ff e8 fb 77 8f ff <0f> 0b e8 f4 77 8f ff e8 0b 30 27 ff eb a2 e8 e8 77 8f ff e8 ff 2f
RSP: 0018:ffffc900011ef100 EFLAGS: 00010293
RAX: ffffffff81d946b5 RBX: 0000008410000000 RCX: ffff8881110f2780
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc900011ef470 R08: dffffc0000000000 R09: ffffed10223c1181
R10: ffffed10223c1181 R11: 1ffff110223c1180 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000008000000000 R15: ffff888111e08e98
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555588f5e818 CR3: 000000010d2fa000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_writepages+0x48a/0x6c0 mm/page-writeback.c:2388
 __writeback_single_inode+0xd5/0x9c0 fs/fs-writeback.c:1647
 writeback_sb_inodes+0x9c0/0x1590 fs/fs-writeback.c:1930
 wb_writeback+0x3f1/0x980 fs/fs-writeback.c:2106
 wb_do_writeback fs/fs-writeback.c:2253 [inline]
 wb_workfn+0x38f/0xe20 fs/fs-writeback.c:2294
 process_one_work+0x6be/0xba0 kernel/workqueue.c:2325
 worker_thread+0xa59/0x1200 kernel/workqueue.c:2472
 kthread+0x411/0x500 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
Modules linked in:
---[ end trace 8fc12d3102425914 ]---
RIP: 0010:ext4_writepages+0x2f75/0x2f90 fs/ext4/inode.c:2746
Code: 00 00 00 e8 ad 7a 8f ff 84 db 75 2c e8 14 78 8f ff 49 bc 00 00 00 00 00 fc ff df 48 8b 5c 24 20 e9 d6 f7 ff ff e8 fb 77 8f ff <0f> 0b e8 f4 77 8f ff e8 0b 30 27 ff eb a2 e8 e8 77 8f ff e8 ff 2f
RSP: 0018:ffffc900011ef100 EFLAGS: 00010293
RAX: ffffffff81d946b5 RBX: 0000008410000000 RCX: ffff8881110f2780
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc900011ef470 R08: dffffc0000000000 R09: ffffed10223c1181
R10: ffffed10223c1181 R11: 1ffff110223c1180 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000008000000000 R15: ffff888111e08e98
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9afaa85000 CR3: 0000000101fe2000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400