------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2747!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 8 Comm: kworker/u4:0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: writeback wb_workfn (flush-7:5)
RIP: 0010:ext4_writepages+0x3069/0x3090 fs/ext4/inode.c:2746
Code: 00 00 00 e8 89 35 8e ff 84 db 75 2c e8 f0 32 8e ff 49 bc 00 00 00 00 00 fc ff df 48 8b 5c 24 20 e9 8e f7 ff ff e8 d7 32 8e ff <0f> 0b e8 d0 32 8e ff e8 67 e2 24 ff eb a2 e8 c4 32 8e ff e8 5b e2
RSP: 0018:ffffc90000087100 EFLAGS: 00010293
RAX: ffffffff81db9699 RBX: 0000008410000000 RCX: ffff8881002762c0
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc90000087470 R08: ffff88810990062f R09: 1ffff110213200c5
R10: dffffc0000000000 R11: ffffed10213200c6 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000008000000000 R15: ffff8881099008c0
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbe7ecd9060 CR3: 0000000126ee9000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_writepages+0x473/0x6c0 mm/page-writeback.c:2388
 __writeback_single_inode+0xd5/0x9c0 fs/fs-writeback.c:1657
 writeback_sb_inodes+0xa10/0x1610 fs/fs-writeback.c:1940
 wb_writeback+0x40b/0x9d0 fs/fs-writeback.c:2116
 wb_do_writeback fs/fs-writeback.c:2263 [inline]
 wb_workfn+0x3ac/0xf30 fs/fs-writeback.c:2304
 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 0f752a8ac072b4ae ]---
RIP: 0010:ext4_writepages+0x3069/0x3090 fs/ext4/inode.c:2746
Code: 00 00 00 e8 89 35 8e ff 84 db 75 2c e8 f0 32 8e ff 49 bc 00 00 00 00 00 fc ff df 48 8b 5c 24 20 e9 8e f7 ff ff e8 d7 32 8e ff <0f> 0b e8 d0 32 8e ff e8 67 e2 24 ff eb a2 e8 c4 32 8e ff e8 5b e2
RSP: 0018:ffffc90000087100 EFLAGS: 00010293
RAX: ffffffff81db9699 RBX: 0000008410000000 RCX: ffff8881002762c0
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc90000087470 R08: ffff88810990062f R09: 1ffff110213200c5
R10: dffffc0000000000 R11: ffffed10213200c6 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000008000000000 R15: ffff8881099008c0
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbb755228a6 CR3: 000000010cb26000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400