STATIC void * GC_generic_or_special_malloc(size_t lb, int knd)
{
    switch(knd) {
#     ifdef STUBBORN_ALLOC
        case STUBBORN:
            return(GC_malloc_stubborn((size_t)lb));
#     endif
        case PTRFREE:
            return(GC_malloc_atomic((size_t)lb));
        case NORMAL:
            return(GC_malloc((size_t)lb));
        case UNCOLLECTABLE:
            return(GC_malloc_uncollectable((size_t)lb));
#       ifdef ATOMIC_UNCOLLECTABLE
          case AUNCOLLECTABLE:
            return(GC_malloc_atomic_uncollectable((size_t)lb));
#       endif /* ATOMIC_UNCOLLECTABLE */
        default:
            return(GC_generic_malloc(lb,knd));
    }
}

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.