On Thu, Sep 30, 2021 at 03:50AM +0000, yanjun.zhu@linux.dev wrote:

> >> -EXPORT_SYMBOL(__kasan_kmalloc);
> >> 
> >> Sorry, but this will break all users of kmalloc() with KASAN on if
> >> !TRACING:
> > 
> > *module users.
> > 
> > An allmodconfig but with CONFIG_TRACING=n will probably show you the problem.
> 
> Follow your advice, I changed CONFIG_TRACING=n in .config. Then I run "make -jxx modules".
> But CONFIG_TRACING is changed to y. 
> So what you mentioned does not appear.

CONFIG_TRACING is not user selectable but auto-selected, just have to
disable all those that select it. See .config, which breaks.