kworker/u4:6: attempt to access beyond end of device
loop0: rw=2049, sector=40960, nr_sectors = 24 limit=40427
------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2761!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 917 Comm: kworker/u4:6 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: writeback wb_workfn (flush-7:4)
RIP: 0010:ext4_writepages+0x30c2/0x30e0 fs/ext4/inode.c:2760
Code: 06 85 ff 84 db 75 31 e8 4c 03 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 2e 03 85 ff <0f> 0b e8 27 03 85 ff e8 2e 14 14 ff eb 93 e8 1b 03 85 ff e8 22 14
RSP: 0018:ffffc900111c7060 EFLAGS: 00010293
RAX: ffffffff81ec68b2 RBX: 0000008410000000 RCX: ffff88811d238000
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc900111c73d0 R08: ffff888133709cef R09: 1ffff110266e139d
R10: dffffc0000000000 R11: ffffed10266e139e R12: dffffc0000000000
R13: ffff88810def2000 R14: 0000008000000000 R15: 1ffff92002238e38
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd1e5859d58 CR3: 000000012fb19000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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: 06 85 ff 84 db 75 31 e8 4c 03 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 2e 03 85 ff <0f> 0b e8 27 03 85 ff e8 2e 14 14 ff eb 93 e8 1b 03 85 ff e8 22 14
RSP: 0018:ffffc900111c7060 EFLAGS: 00010293
RAX: ffffffff81ec68b2 RBX: 0000008410000000 RCX: ffff88811d238000
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc900111c73d0 R08: ffff888133709cef R09: 1ffff110266e139d
R10: dffffc0000000000 R11: ffffed10266e139e R12: dffffc0000000000
R13: ffff88810def2000 R14: 0000008000000000 R15: 1ffff92002238e38
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb1f934cd58 CR3: 000000010fa5a000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400