From: Linus Torvalds <torvalds@linux-foundation.org>
To: Waiman Long <longman@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
David Howells <dhowells@redhat.com>,
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>,
Joe Perches <joe@perches.com>,
Matthew Wilcox <willy@infradead.org>,
David Rientjes <rientjes@google.com>
Subject: Re: [PATCH v3] mm: Add kvfree_sensitive() for freeing sensitive data objects
Date: Tue, 7 Apr 2020 13:09:11 -0700 [thread overview]
Message-ID: <CAHk-=wh4YYef26dFX2o9iAKts6vuPceUNg7Bdq32REnvfOWiog@mail.gmail.com> (raw)
In-Reply-To: <20200407200318.11711-1-longman@redhat.com>
On Tue, Apr 7, 2020 at 1:03 PM Waiman Long <longman@redhat.com> wrote:
>
> For kvmalloc'ed data object that contains sensitive information like
> cryptographic key, we need to make sure that the buffer is always
> cleared before freeing it. Using memset() alone for buffer clearing may
> not provide certainty as the compiler may compile it away. To be sure,
> the special memzero_explicit() has to be used.
Ack. Since this isn't exactly high-priority, I'm assuming it will go
through the usual channels (ie Andrew).
Linus
next prev parent reply other threads:[~2020-04-07 20:09 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-07 20:03 [PATCH v3] mm: Add kvfree_sensitive() for freeing sensitive data objects Waiman Long
2020-04-07 20:09 ` Linus Torvalds [this message]
2020-04-07 20:19 ` David Howells
2020-04-07 20:24 ` Waiman Long
2020-04-07 20:21 ` David Howells
2020-05-05 20:35 ` Andrew Morton
2020-05-06 1:29 ` Waiman Long
2020-04-07 20:31 ` Joe Perches
2020-04-07 20:45 ` Waiman Long
2020-04-07 21:01 ` Linus Torvalds
2020-04-07 21:24 ` Uladzislau Rezki
2020-04-07 21:30 ` Linus Torvalds
2020-04-07 22:12 ` Matthew Wilcox
2020-04-08 0:35 ` Joe Perches
2020-04-08 13:38 ` Jarkko Sakkinen
2020-05-01 23:22 ` Eric Biggers
2020-05-04 2:57 ` Waiman Long
2020-05-14 11:00 ` Balbir Singh
2020-05-14 12:00 ` Matthew Wilcox
2020-05-14 12:08 ` Joe Perches
2020-05-17 0:27 ` Balbir Singh
2020-05-17 0:44 ` Matthew Wilcox
2020-05-18 2:39 ` Waiman Long
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