Do not try to parse mapped pseudofiles

Author: apangin

src/symbols_linux.cpp

@@ -583,6 +583,10 @@ void Symbols::parseLibraries(CodeCacheArray* array, bool kernel_symbols) {
         if (!map.isReadable() || map.file() == NULL || map.file()[0] == 0) {
             continue;
         }
+        if (strchr(map.file(), ':') != NULL) {
+            // Skip pseudofiles like anon_inode:name, /memfd:name
+            continue;
+        }
 
         const char* image_base = map.addr();
         if (image_base != image_end) last_readable_base = image_base;
@@ -605,7 +609,8 @@ void Symbols::parseLibraries(CodeCacheArray* array, bool kernel_symbols) {
                 // Do not parse the same executable twice, e.g. on Alpine Linux
                 if (_parsed_inodes.insert(u64(map.dev()) << 32 | inode).second) {
                     // Be careful: executable file is not always ELF, e.g. classes.jsa
-                    if ((image_base -= map.offs()) >= last_readable_base) {
+                    unsigned long offs = map.offs();
+                    if ((unsigned long)image_base > offs && (image_base -= offs) >= last_readable_base) {
                         ElfParser::parseProgramHeaders(cc, image_base, image_end);
                     }
                     ElfParser::parseFile(cc, image_base, map.file(), true);