chmod: --preserve-root can be bypassed with any directory that resolves to root

[sylvestre]

Component

chmod

Description

--preserve-root can be bypassed with any directory that resolves to root.
In Chmoder::chmod()

            if self.recursive && self.preserve_root && file == Path::new("/") {
                return Err(ChmodError::PreserveRoot("/".to_string()).into());
            }

Test / Reproduction Steps

../target/release/chmod -R --preserve-root 000 /../ -v