Re: [PATCH] kasan: fix the missing underflow in memmove and memcpy with CONFIG_KASAN_GENERIC=y

[Qian Cai]

> On Oct 8, 2019, at 2:16 AM, Walter Wu <walter-zh...@mediatek.com> wrote:
> 
> It is an undefined behavior to pass a negative numbers to
>    memset()/memcpy()/memmove(), so need to be detected by KASAN.

Why can’t this be detected by UBSAN?