bad logic for throwCantUnpack("cmdsize") [simple]

https://github.com/upx/upx/issues/161 modified: p_mach.cpp
2017-12-19 17:36:22 -08:00
parent 990988f920
commit aefb2fa3c3
1 changed files with 1 additions and 1 deletions
@@ -1563,7 +1563,7 @@ void PackMachBase<T>::unpack(OutputFile *fo)
        memcpy(&msegcmd[j], ptr, umin(sizeof(Mach_segment_command),
            ((Mach_command const *)ptr)->cmdsize));
        ptr += (unsigned) ((Mach_command const *)ptr)->cmdsize;
-        if (ptr_udiff(ptr, mhdr) > ph.u_len) {
+        if (ptr_udiff(ptr, (1+ mhdr)) > ph.u_len) {
            throwCantUnpack("cmdsize");
        }
    }