UDF-fs: warning (device loop0): udf_truncate_tail_extent: Too long extent after EOF in inode 838: i_size: 0 lbcount: 4096 extent 67+4096
------------[ cut here ]------------
iinfo->i_lenAlloc != epos->offset - udf_file_entry_alloc_offset(inode)
WARNING: fs/udf/inode.c:2084 at __udf_add_aext+0x540/0x6d0 fs/udf/inode.c:2083, CPU#0: syz.0.691/11270
Modules linked in:
CPU: 0 UID: 0 PID: 11270 Comm: syz.0.691 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:__udf_add_aext+0x540/0x6d0 fs/udf/inode.c:2083
Code: 5f 5d e9 93 17 dd 07 cc e8 bd 48 7b fe 90 0f 0b 90 e9 14 fc ff ff e8 af 48 7b fe 90 0f 0b 90 e9 66 fd ff ff e8 a1 48 7b fe 90 <0f> 0b 90 e9 50 fd ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c f7
RSP: 0018:ffffc90003fa78a0 EFLAGS: 00010293
RAX: ffffffff83490b2f RBX: dffffc0000000000 RCX: ffff88802e709e80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000001 R12: 00000000000000d8
R13: 0000000000000008 R14: ffffc90003fa7b40 R15: 0000000000000000
FS:  00007fa7706b56c0(0000) GS:ffff88812633f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000c000 CR3: 000000005905c000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 udf_add_aext fs/udf/inode.c:2145 [inline]
 udf_do_extend_file+0x5a8/0x11e0 fs/udf/inode.c:551
 udf_extend_file fs/udf/inode.c:712 [inline]
 udf_setsize+0xbff/0x10b0 fs/udf/inode.c:1300
 udf_setattr+0x3a2/0x5a0 fs/udf/file.c:238
 notify_change+0xc18/0xf60 fs/attr.c:556
 do_truncate+0x1c2/0x250 fs/open.c:68
 do_ftruncate+0x4ea/0x5c0 fs/open.c:196
 do_sys_ftruncate fs/open.c:208 [inline]
 __do_sys_ftruncate fs/open.c:213 [inline]
 __se_sys_ftruncate fs/open.c:211 [inline]
 __x64_sys_ftruncate+0x92/0xf0 fs/open.c:211
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa77247c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa7706b5028 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffda RBX: 00007fa7726f6090 RCX: 00007fa77247c799
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000007
RBP: 00007fa772512bd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa7726f6128 R14: 00007fa7726f6090 R15: 00007ffe1abf7218
 </TASK>