From: Linus Torvalds <torvalds@linux-foundation.org>
To: Joe Perches <joe@perches.com>
Cc: David Howells <dhowells@redhat.com>,
Waiman Long <longman@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
James Morris <jmorris@namei.org>,
"Serge E. Hallyn" <serge@hallyn.com>,
Linux-MM <linux-mm@kvack.org>,
keyrings@vger.kernel.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] mm: Add kvfree_sensitive() for freeing sensitive data objects
Date: Mon, 6 Apr 2020 10:26:37 -0700 [thread overview]
Message-ID: <CAHk-=wiPHA4XbL-CVTDBwjYzUJwaGYriGD44uvOaqQai+zOw6A@mail.gmail.com> (raw)
In-Reply-To: <dbfcbbd55c63fc87bfb31af3cae1b15e04d8a821.camel@perches.com>
On Mon, Apr 6, 2020 at 10:12 AM Joe Perches <joe@perches.com> wrote:
>
> Add yet another alloc flag like __GFP_SENSITIVE
> and have kfree operate on that and not have a
> kfree_sensitive at all.
That sounds potentially sensible. Maybe even a SLAB_SENSITIVE to mark
a whole slab cache sensitive for kmem_cache_create().
I'm not sure how controlled the allocations are, though. The
allocations that get used for keys etc might come from outside the
crypto layer.
Linus
next prev parent reply other threads:[~2020-04-06 17:27 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-06 2:37 [PATCH] mm: Add kvfree_sensitive() for freeing sensitive data objects Waiman Long
2020-04-06 4:20 ` David Rientjes
2020-04-06 14:36 ` Waiman Long
2020-04-06 14:39 ` Matthew Wilcox
2020-04-06 7:44 ` David Howells
2020-04-06 23:20 ` David Rientjes
2020-04-06 14:32 ` David Howells
2020-04-06 14:40 ` Waiman Long
2020-04-06 15:45 ` Joe Perches
2020-04-06 16:00 ` David Howells
2020-04-06 16:10 ` Joe Perches
2020-04-06 16:41 ` Linus Torvalds
2020-04-06 16:42 ` Joe Perches
2020-04-06 17:11 ` Linus Torvalds
2020-04-06 17:20 ` Joe Perches
2020-04-06 17:26 ` Matthew Wilcox
2020-04-06 17:33 ` Linus Torvalds
2020-04-06 17:46 ` Joe Perches
2020-04-06 17:58 ` Waiman Long
2020-04-06 18:06 ` Linus Torvalds
2020-04-06 18:46 ` Joe Perches
2020-04-06 16:26 ` David Howells
2020-04-06 16:38 ` Joe Perches
2020-04-06 17:10 ` Joe Perches
2020-04-06 17:24 ` Matthew Wilcox
2020-04-06 17:26 ` Linus Torvalds [this message]
2020-04-06 17:51 ` David Howells
2020-04-06 17:58 ` Linus Torvalds
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