search for: 23c7500eea7d

On Mon, Apr 13, 2020 at 05:15:49PM -0400, Waiman Long wrote: > diff --git a/mm/slab_common.c b/mm/slab_common.c > index 23c7500eea7d..c08bc7eb20bd 100644 > --- a/mm/slab_common.c > +++ b/mm/slab_common.c > @@ -1707,17 +1707,17 @@ void *krealloc(const void *p, size_t new_size, gfp_t flags) > EXPORT_SYMBOL(krealloc); > > /** > - * kzfree - like kfree but zero memory > + * kfree_sensitive - Clear sensiti...

This patchset makes a global rename of the kzfree() to kfree_sensitive() to highlight the fact buffer clearing is only needed if the data objects contain sensitive information like encrpytion key. The fact that kzfree() uses memset() to do the clearing isn't totally safe either as compiler may compile out the clearing in their optimizer. Instead, the new kfree_sensitive() uses

...e_sensitive)\n"); ptr = kmalloc(size, GFP_KERNEL); if (!ptr) { pr_err("Allocation failed\n"); return; } - kzfree(ptr); - kzfree(ptr); + kfree_sensitive(ptr); + kfree_sensitive(ptr); } #ifdef CONFIG_KASAN_VMALLOC diff --git a/mm/slab_common.c b/mm/slab_common.c index 23c7500eea7d..c08bc7eb20bd 100644 --- a/mm/slab_common.c +++ b/mm/slab_common.c @@ -1707,17 +1707,17 @@ void *krealloc(const void *p, size_t new_size, gfp_t flags) EXPORT_SYMBOL(krealloc); /** - * kzfree - like kfree but zero memory + * kfree_sensitive - Clear sensitive information in memory before freeing...