syz.7.4124: attempt to access beyond end of device
nbd7: rw=0, sector=64, nr_sectors = 1 limit=0
syz.7.4124: attempt to access beyond end of device
nbd7: rw=0, sector=256, nr_sectors = 1 limit=0
UDF-fs: error (device nbd7): udf_read_tagged: read failed, block=256, location=256
------------[ cut here ]------------
WARNING: CPU: 0 PID: 27224 at fs/buffer.c:1125 __getblk_slow+0x4cc/0x560 fs/buffer.c:1125
Modules linked in:
CPU: 0 UID: 0 PID: 27224 Comm: syz.7.4124 Not tainted 6.16.0-syzkaller-11699-g7e161a991ea7 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:__getblk_slow+0x4cc/0x560 fs/buffer.c:1125
Code: c0 8b 48 89 df e8 f4 e3 bb ff 90 0f 0b e8 4c 2f 74 ff 48 c7 c6 60 55 c0 8b 48 89 df e8 dd e3 bb ff 90 0f 0b e8 35 2f 74 ff 90 <0f> 0b 90 8b 74 24 0c 89 ea 48 c7 c7 c0 56 c0 8b 31 db e8 1d d9 52
RSP: 0018:ffffc90003aef7f0 EFLAGS: 00010283
RAX: 00000000000188d6 RBX: 0000000000000200 RCX: ffffc9000de52000
RDX: 0000000000080000 RSI: ffffffff8247632b RDI: 0000000000000005
RBP: 0000000000000400 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000200 R11: 0000000000000000 R12: ffff888024082280
R13: 0000000000000200 R14: 0000000000000200 R15: ffff888024082280
FS:  00007f38f19bc6c0(0000) GS:ffff8881246c7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f8f0616f38 CR3: 0000000066d35000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 bdev_getblk+0xd4/0xe0 fs/buffer.c:1461
 __bread_gfp+0x86/0x3c0 fs/buffer.c:1515
 sb_bread include/linux/buffer_head.h:346 [inline]
 udf_read_tagged+0xae/0x740 fs/udf/misc.c:199
 udf_check_anchor_block+0x89/0x4b0 fs/udf/super.c:1912
 udf_scan_anchors fs/udf/super.c:1990 [inline]
 udf_load_vrs+0x682/0x1070 fs/udf/super.c:2033
 udf_fill_super+0x791/0x1df0 fs/udf/super.c:2201
 get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
 vfs_get_tree+0x8e/0x340 fs/super.c:1815
 do_new_mount fs/namespace.c:3805 [inline]
 path_mount+0x1482/0x1fd0 fs/namespace.c:4120
 do_mount fs/namespace.c:4133 [inline]
 __do_sys_mount fs/namespace.c:4344 [inline]
 __se_sys_mount fs/namespace.c:4321 [inline]
 __x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f38f0b8eb69
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:00007f38f19bc038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f38f0db6080 RCX: 00007f38f0b8eb69
RDX: 0000200000000080 RSI: 0000200000004a00 RDI: 0000200000000000
RBP: 00007f38f0c11df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000014 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f38f0db6080 R15: 00007ffe39bb4308
 </TASK>