Panic when meeting vDSO

[breezewish]

Example code:

TargetSharedLibrary::each(|obj| {
    some_container.push(obj.actual_load_addr().0);
})

It will panic under debug profile:

thread '<unnamed>' panicked at 'attempt to add with overflow', /root/.cargo/registry/src/mirrors.ustc.edu.cn-61ef6e0cd06fb9b8/findshlibs-0.10.2/src/lib.rs:261:14

In my case, the overflow comes from the vDSO:

obj_name = "linux-vdso.so.1"
segment_name = LOAD
stated_virtual_memory_address = 0xffffffffff700000
shlib.virtual_memory_bias = 0x7fff70cfc000

I'm using CentOS 7:

$ cat /etc/*elease
CentOS Linux release 7.9.2009 (Core)
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"