This is a note to let you know that I've just added the patch titled
random: properly align get_random_int_hash
to the 3.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
random-properly-align-get_random_int_hash.patch
and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From b1132deac01c2332d234fa821a70022796b79182 Mon Sep 17 00:00:00 2001
From: Eric Biggers <ebiggers3@xxxxxxxxx>
Date: Wed, 4 May 2016 21:08:39 -0400
Subject: random: properly align get_random_int_hash
From: Eric Biggers <ebiggers3@xxxxxxxxx>
commit b1132deac01c2332d234fa821a70022796b79182 upstream.
get_random_long() reads from the get_random_int_hash array using an
unsigned long pointer. For this code to be guaranteed correct on all
architectures, the array must be aligned to an unsigned long boundary.
Signed-off-by: Eric Biggers <ebiggers3@xxxxxxxxx>
Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/char/random.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1714,13 +1714,15 @@ int random_int_secret_init(void)
return 0;
}
+static DEFINE_PER_CPU(__u32 [MD5_DIGEST_WORDS], get_random_int_hash)
+ __aligned(sizeof(unsigned long));
+
/*
* Get a random word for internal kernel use only. Similar to urandom but
* with the goal of minimal entropy pool depletion. As a result, the random
* value is not cryptographically secure but for several uses the cost of
* depleting entropy is too high
*/
-static DEFINE_PER_CPU(__u32 [MD5_DIGEST_WORDS], get_random_int_hash);
unsigned int get_random_int(void)
{
__u32 *hash;
Patches currently in stable-queue which might be from ebiggers3@xxxxxxxxx are
queue-3.18/random-properly-align-get_random_int_hash.patch
queue-3.18/crypto-gcm-wait-for-crypto-op-not-signal-safe.patch