UBUNTU: Ubuntu-4.13.0-45.50

[mirror_ubuntu-artful-kernel.git] / crypto / skcipher.c

diff --git a/crypto/skcipher.c b/crypto/skcipher.c
index 4faa0fd53b0c120d39022ad726dbbe2c74f787bd..d5692e35fab1f069376f7c54358ff5e5f0cb352e 100644 (file)
--- a/crypto/skcipher.c
+++ b/crypto/skcipher.c
@@ -426,14 +426,9 @@ static int skcipher_copy_iv(struct skcipher_walk *walk)
 
 static int skcipher_walk_first(struct skcipher_walk *walk)
 {
-       walk->nbytes = 0;
-
        if (WARN_ON_ONCE(in_irq()))
                return -EDEADLK;
 
-       if (unlikely(!walk->total))
-               return 0;
-
        walk->buffer = NULL;
        if (unlikely(((unsigned long)walk->iv & walk->alignmask))) {
                int err = skcipher_copy_iv(walk);
@@ -452,10 +447,15 @@ static int skcipher_walk_skcipher(struct skcipher_walk *walk,
 {
        struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 
+       walk->total = req->cryptlen;
+       walk->nbytes = 0;
+
+       if (unlikely(!walk->total))
+               return 0;
+
        scatterwalk_start(&walk->in, req->src);
        scatterwalk_start(&walk->out, req->dst);
 
-       walk->total = req->cryptlen;
        walk->iv = req->iv;
        walk->oiv = req->iv;
 
@@ -509,6 +509,11 @@ static int skcipher_walk_aead_common(struct skcipher_walk *walk,
        struct crypto_aead *tfm = crypto_aead_reqtfm(req);
        int err;
 
+       walk->nbytes = 0;
+
+       if (unlikely(!walk->total))
+               return 0;
+
        walk->flags &= ~SKCIPHER_WALK_PHYS;
 
        scatterwalk_start(&walk->in, req->src);