------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2761!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: writeback wb_workfn (flush-7:2)
RIP: 0010:ext4_writepages+0x30c2/0x30e0 fs/ext4/inode.c:2760
Code: 11 85 ff 84 db 75 31 e8 ac 0e 85 ff 49 bc 00 00 00 00 00 fc ff df 4c 8b 7c 24 10 4c 8b 6c 24 40 e9 08 d3 ff ff e8 8e 0e 85 ff <0f> 0b e8 87 0e 85 ff e8 6e 1e 14 ff eb 93 e8 7b 0e 85 ff e8 62 1e
RSP: 0000:ffffc90000087060 EFLAGS: 00010293
RAX: ffffffff81ec5e72 RBX: 000000c410000000 RCX: ffff88810029bcc0
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc900000873d0 R08: ffff88811793786f R09: 1ffff11022f26f0d
R10: dffffc0000000000 R11: ffffed1022f26f0e R12: dffffc0000000000
R13: ffff88813cf2a000 R14: 0000008000000000 R15: 1ffff92000010e38
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4d38370000 CR3: 00000001243f1000 CR4: 00000000003506b0
Call Trace:
 <TASK>
 do_writepages+0x3a4/0x5f0 mm/page-writeback.c:2494
 __writeback_single_inode+0xc6/0xad0 fs/fs-writeback.c:1622
 writeback_sb_inodes+0xa10/0x15d0 fs/fs-writeback.c:1913
 __writeback_inodes_wb+0x12f/0x400 fs/fs-writeback.c:1984
 wb_writeback+0x41f/0x9d0 fs/fs-writeback.c:2091
 wb_check_start_all fs/fs-writeback.c:2217 [inline]
 wb_do_writeback fs/fs-writeback.c:2243 [inline]
 wb_workfn+0x825/0xeb0 fs/fs-writeback.c:2276
 process_one_work+0x71f/0xc40 kernel/workqueue.c:2302
 worker_thread+0xa29/0x11e0 kernel/workqueue.c:2449
 kthread+0x281/0x320 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_writepages+0x30c2/0x30e0 fs/ext4/inode.c:2760
Code: 11 85 ff 84 db 75 31 e8 ac 0e 85 ff 49 bc 00 00 00 00 00 fc ff df 4c 8b 7c 24 10 4c 8b 6c 24 40 e9 08 d3 ff ff e8 8e 0e 85 ff <0f> 0b e8 87 0e 85 ff e8 6e 1e 14 ff eb 93 e8 7b 0e 85 ff e8 62 1e
RSP: 0000:ffffc90000087060 EFLAGS: 00010293
RAX: ffffffff81ec5e72 RBX: 000000c410000000 RCX: ffff88810029bcc0
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc900000873d0 R08: ffff88811793786f R09: 1ffff11022f26f0d
R10: dffffc0000000000 R11: ffffed1022f26f0e R12: dffffc0000000000
R13: ffff88813cf2a000 R14: 0000008000000000 R15: 1ffff92000010e38
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000006000 CR3: 0000000131931000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400