Re: [PATCH v2 1/2] mm, kasan: don't call kasan_krealloc() from ksize().

[Andrew Morton]

On Wed, 13 Apr 2016 13:20:09 +0200 Alexander Potapenko <glider@xxxxxxxxxx> wrote:

> Instead of calling kasan_krealloc(), which replaces the memory allocation
> stack ID (if stack depot is used), just unpoison the whole memory chunk.

I don't understand why these two patches exist.  Bugfix?  Cleanup? 
Optimization?


I had to change kmalloc_tests_init() a bit due to
mm-kasan-initial-memory-quarantine-implementation.patch:

        kasan_stack_oob();
        kasan_global_oob();
 #ifdef CONFIG_SLAB
        kasan_quarantine_cache();
 #endif
+       ksize_unpoisons_memory();
        return -EAGAIN;
 }

Please check.