syzbot

loop0: detected capacity change from 0 to 128
UDF-fs: error (device loop0): udf_read_tagged: read failed, block=256, location=256
UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000)
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WARNING: CPU: 0 PID: 6103 at fs/udf/truncate.c:224 udf_truncate_extents+0xd4c/0xec0 fs/udf/truncate.c:224
Modules linked in:
CPU: 0 UID: 0 PID: 6103 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:udf_truncate_extents+0xd4c/0xec0 fs/udf/truncate.c:224
Code: 9b 4c 0e 48 3b 84 24 80 01 00 00 75 77 44 89 e0 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 35 a3 8a fe 90 <0f> 0b 90 eb 88 44 89 e9 80 e1 07 38 c1 0f 8c e4 f3 ff ff 4c 89 ef
RSP: 0018:ffffc90003ba78a0 EFLAGS: 00010293
RAX: ffffffff8332753b RBX: 1ffff1100b0250e9 RCX: ffff888030075a00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003ba7a78 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 000000000000000a R15: 000000000000000a
FS:  000055555e33d500(0000) GS:ffff88812702f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000025e0 CR3: 000000003f79e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 udf_write_failed+0x18b/0x1c0 fs/udf/inode.c:178
 udf_write_begin+0x214/0x270 fs/udf/inode.c:265
 generic_perform_write+0x29d/0x8c0 mm/filemap.c:4242
 udf_file_write_iter+0x2f4/0x6e0 fs/udf/file.c:111
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x5d5/0xb40 fs/read_write.c:686
 ksys_write+0x14b/0x260 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f95d2aeeec9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffeb739e328 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f95d2d45fa0 RCX: 00007f95d2aeeec9
RDX: 0000000000001006 RSI: 0000200000001600 RDI: 0000000000000004
RBP: 00007f95d2b71f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f95d2d45fa0 R14: 00007f95d2d45fa0 R15: 0000000000000003
 </TASK>