From: "Luck, Tony" <tony.luck@intel.com>
To: Linus Torvalds <torvalds@linux-foundation.org>,
"H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@elte.hu>,
Thomas Gleixner <tglx@linutronix.de>,
Fenghua Yu <fenghua.yu@intel.com>, Matt Mackall <mpm@selenic.com>,
Herbert Xu <herbert@gondor.hengli.com.au>,
"Theodore Ts'o" <tytso@mit.edu>, Jeff Garzik <jgarzik@pobox.com>,
Arjan van de Ven <arjan@linux.intel.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH] fix typo/thinko in get_random_bytes()
Date: Wed, 16 Nov 2011 10:50:56 -0800 [thread overview]
Message-ID: <4ec4061010261a4cb0@agluck-desktop.sc.intel.com> (raw)
If there is an architecture-specific random number generator we use
it to acquire randomness one "long" at a time. We should put these
random words into consecutive words in the result buffer - not just
overwrite the first word again and again.
Signed-off-by: Tony Luck <tony.luck@intel.com>
---
diff --git a/drivers/char/random.c b/drivers/char/random.c
index 63e19ba..6035ab8 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -941,7 +941,7 @@ void get_random_bytes(void *buf, int nbytes)
if (!arch_get_random_long(&v))
break;
- memcpy(buf, &v, chunk);
+ memcpy(p, &v, chunk);
p += chunk;
nbytes -= chunk;
}
next reply other threads:[~2011-11-16 18:50 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-16 18:50 Luck, Tony [this message]
2011-11-16 19:34 ` [PATCH] fix typo/thinko in get_random_bytes() H. Peter Anvin
2011-11-16 19:41 ` Thomas Gleixner
2011-11-17 16:34 ` H. Peter Anvin
2011-11-18 23:45 ` [tip:x86/urgent] random: Fix handing of arch_get_random_long " tip-bot for Luck, Tony
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4ec4061010261a4cb0@agluck-desktop.sc.intel.com \
--to=tony.luck@intel.com \
--cc=arjan@linux.intel.com \
--cc=fenghua.yu@intel.com \
--cc=herbert@gondor.hengli.com.au \
--cc=hpa@zytor.com \
--cc=jgarzik@pobox.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=mpm@selenic.com \
--cc=tglx@linutronix.de \
--cc=torvalds@linux-foundation.org \
--cc=tytso@mit.edu \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.