September 29, 2021 8:45 PM, "Marco Elver" <elver@xxxxxxxxxx> wrote:
> On Wed, 29 Sept 2021 at 14:42, Marco Elver <elver@xxxxxxxxxx> wrote:
>
>> On Wed, Sep 29, 2021 at 07:49PM -0400, yanjun.zhu@xxxxxxxxx wrote:
>> From: Zhu Yanjun <yanjun.zhu@xxxxxxxxx>
>>
>> Since the function __kasan_kmalloc is only used in kasan module,
>> remove EXPORT_SYMBOL to this function.
>>
>> This is incorrect, see below.
>>
>> @@ -521,7 +521,6 @@ void * __must_check __kasan_kmalloc(struct kmem_cache *cache, const void
>> *object
>> {
>> return ____kasan_kmalloc(cache, object, size, flags);
>> }
>> -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.
Zhu Yanjun
>
>> __always_inline kmalloc() include/linux/slab.h
>> -> __always_inline kmem_cache_alloc_trace() include/linux/slab.h
>> -> __always_inline kasan_kmalloc() include/linux/kasan.h
>> -> __kasan_kmalloc() mm/kasan/common.c
