------------[ cut here ]------------
WARNING: CPU: 0 PID: 4259 at fs/udf/truncate.c:208 udf_truncate_extents+0xbf8/0xd70 fs/udf/truncate.c:208
Modules linked in:
CPU: 0 PID: 4259 Comm: kworker/u4:5 Not tainted 5.15.186-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: writeback wb_workfn (flush-7:3)
RIP: 0010:udf_truncate_extents+0xbf8/0xd70 fs/udf/truncate.c:208
Code: 00 00 0f 85 b6 00 00 00 89 d8 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 74 3b b2 fe bb fb ff ff ff eb 93 e8 68 3b b2 fe <0f> 0b eb 8a 44 89 f9 80 e1 07 38 c1 0f 8c 3f f5 ff ff 4c 89 ff e8
RSP: 0018:ffffc900032ce740 EFLAGS: 00010293
RAX: ffffffff82c587a8 RBX: 0000000000000000 RCX: ffff888027591dc0
RDX: 0000000000000000 RSI: 0000008001e743fb RDI: 0000000000000000
RBP: ffffc900032ce910 R08: ffff888027591dc0 R09: 0000000000000002
R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000008001e743fb R14: ffffc900032ce840 R15: 00000000000000ff
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efcc45ec178 CR3: 000000006361d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 udf_do_extend_file+0xd22/0x1030 fs/udf/inode.c:501
 inode_getblk fs/udf/inode.c:708 [inline]
 udf_get_block+0xdd3/0x3ca0 fs/udf/inode.c:358
 __mpage_writepage+0x4d3/0x1bf0 fs/mpage.c:564
 write_cache_pages+0x984/0xfa0 mm/page-writeback.c:2277
 mpage_writepages+0xf3/0x270 fs/mpage.c:712
 do_writepages+0x48d/0x6d0 mm/page-writeback.c:2386
 __writeback_single_inode+0x153/0xda0 fs/fs-writeback.c:1647
 writeback_sb_inodes+0x9fe/0x1610 fs/fs-writeback.c:1930
 wb_writeback+0x443/0xb90 fs/fs-writeback.c:2104
 wb_do_writeback fs/fs-writeback.c:2247 [inline]
 wb_workfn+0x423/0xe60 fs/fs-writeback.c:2288
 process_one_work+0x863/0x1000 kernel/workqueue.c:2310
 worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>