From: Luck, Tony <tony.luck@intel.com>
Date: Wed, 16 Nov 2011 18:50:56 +0000 (-0800)
Subject: random: Fix handing of arch_get_random_long in get_random_bytes()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0d2f096b8785b67c38afcf6e1fbb9674af2e05ca;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

random: Fix handing of arch_get_random_long in get_random_bytes()

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>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/4ec4061010261a4cb0@agluck-desktop.sc.intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
---

diff --git a/drivers/char/random.c b/drivers/char/random.c
index 63e19ba56bbe..6035ab8d5ef7 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;
 	}