diff options
Diffstat (limited to 'src/debug/macho/file.go')
| -rw-r--r-- | src/debug/macho/file.go | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/debug/macho/file.go b/src/debug/macho/file.go index 085b0c8219..73cfce3c76 100644 --- a/src/debug/macho/file.go +++ b/src/debug/macho/file.go @@ -345,6 +345,15 @@ func NewFile(r io.ReaderAt) (*File, error) { if err := binary.Read(b, bo, &hdr); err != nil { return nil, err } + if hdr.Iundefsym > uint32(len(f.Symtab.Syms)) { + return nil, &FormatError{offset, fmt.Sprintf( + "undefined symbols index in dynamic symbol table command is greater than symbol table length (%d > %d)", + hdr.Iundefsym, len(f.Symtab.Syms)), nil} + } else if hdr.Iundefsym+hdr.Nundefsym > uint32(len(f.Symtab.Syms)) { + return nil, &FormatError{offset, fmt.Sprintf( + "number of undefined symbols after index in dynamic symbol table command is greater than symbol table length (%d > %d)", + hdr.Iundefsym+hdr.Nundefsym, len(f.Symtab.Syms)), nil} + } dat := make([]byte, hdr.Nindirectsyms*4) if _, err := r.ReadAt(dat, int64(hdr.Indirectsymoff)); err != nil { return nil, err |