Only use the shstrtab if it has the correct type.

This avoids continuing the logic if the section header table isn't
present (except for the contrived case where the random bytes happen to
be the correct section type).

src/linux/module_reader.rs

@@ -126,7 +126,11 @@ fn section_header_with_name<'sc>(
     name: &[u8],
     module_memory: &mut ProcessMemory<'_>,
 ) -> Result<Option<&'sc elf::SectionHeader>, Error> {
-    let strtab_section_header = section_headers.get(strtab_index).ok_or(Error::NoStrTab)?;
+    let strtab_section_header = section_headers
+        .get(strtab_index)
+        .and_then(|hdr| (hdr.sh_type == elf::section_header::SHT_STRTAB).then_some(hdr))
+        .ok_or(Error::NoStrTab)?;
+
     for header in section_headers {
         let sh_name = header.sh_name as u64;
         if sh_name >= strtab_section_header.sh_size {