Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

Pull crypto fix from Herbert Xu:
 "This fixes a boundary condition in the blkcipher SG walking code that
  can lead to a crash when used with the new chacha20 algorithm"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: skcipher - Copy iv from desc even for 0-len walks

diff --git a/crypto/ablkcipher.c b/crypto/ablkcipher.c
index b4ffc5be1a93c1ff0bceb6b9a5cc3dc1b5101d97..e5b5721809e21d5d379e6e711e23ef709252e0ed 100644 (file)
--- a/crypto/ablkcipher.c
+++ b/crypto/ablkcipher.c
@@ -277,12 +277,12 @@ static int ablkcipher_walk_first(struct ablkcipher_request *req,
        if (WARN_ON_ONCE(in_irq()))
                return -EDEADLK;
 
+       walk->iv = req->info;
        walk->nbytes = walk->total;
        if (unlikely(!walk->total))
                return 0;
 
        walk->iv_buffer = NULL;
-       walk->iv = req->info;
        if (unlikely(((unsigned long)walk->iv & alignmask))) {
                int err = ablkcipher_copy_iv(walk, tfm, alignmask);
 

diff --git a/crypto/blkcipher.c b/crypto/blkcipher.c
index 11b981492031361f7cdf336b58ecbb98b8951196..8cc1622b2ee008ef7f5ff31a3ea7d8777f3f5f1b 100644 (file)
--- a/crypto/blkcipher.c
+++ b/crypto/blkcipher.c
@@ -326,12 +326,12 @@ static int blkcipher_walk_first(struct blkcipher_desc *desc,
        if (WARN_ON_ONCE(in_irq()))
                return -EDEADLK;
 
+       walk->iv = desc->info;
        walk->nbytes = walk->total;
        if (unlikely(!walk->total))
                return 0;
 
        walk->buffer = NULL;
-       walk->iv = desc->info;
        if (unlikely(((unsigned long)walk->iv & walk->alignmask))) {
                int err = blkcipher_copy_iv(walk);
                if (err)