On Tue, 2019-10-08 at 05:47 -0400, Qian Cai wrote: > > > On Oct 8, 2019, at 2:16 AM, Walter Wu <walter-zh.wu@xxxxxxxxxxxx> 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? I don't know very well in UBSAN, but I try to build ubsan kernel and test a negative number in memset and kmalloc_memmove_invalid_size(), it look like no check.
