1 files changed, 9 insertions, 8 deletions

diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c
index 1b5a09d1b90b..1b18ce66e7b7 100644
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -5,6 +5,7 @@
 #include <net/esp.h>
 #include <asm/scatterlist.h>
 #include <linux/crypto.h>
+#include <linux/kernel.h>
 #include <linux/pfkeyv2.h>
 #include <linux/random.h>
 #include <net/icmp.h>
@@ -42,10 +43,10 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
         esp = x->data;
         alen = esp->auth.icv_trunc_len;
         tfm = esp->conf.tfm;
-        blksize = (crypto_tfm_alg_blocksize(tfm) + 3) & ~3;
-        clen = (clen + 2 + blksize-1)&~(blksize-1);
+        blksize = ALIGN(crypto_tfm_alg_blocksize(tfm), 4);
+        clen = ALIGN(clen + 2, blksize);
         if (esp->conf.padlen)
-                clen = (clen + esp->conf.padlen-1)&~(esp->conf.padlen-1);
+                clen = ALIGN(clen, esp->conf.padlen);
 
         if ((nfrags = skb_cow_data(skb, clen-skb->len+alen, &trailer)) < 0)
                 goto error;
@@ -143,7 +144,7 @@ static int esp_input(struct xfrm_state *x, struct xfrm_decap_state *decap, struc
         struct ip_esp_hdr *esph;
         struct esp_data *esp = x->data;
         struct sk_buff *trailer;
-        int blksize = crypto_tfm_alg_blocksize(esp->conf.tfm);
+        int blksize = ALIGN(crypto_tfm_alg_blocksize(esp->conf.tfm), 4);
         int alen = esp->auth.icv_trunc_len;
         int elen = skb->len - sizeof(struct ip_esp_hdr) - esp->conf.ivlen - alen;
         int nfrags;
@@ -304,16 +305,16 @@ static int esp_post_input(struct xfrm_state *x, struct xfrm_decap_state *decap,
 static u32 esp4_get_max_size(struct xfrm_state *x, int mtu)
 {
         struct esp_data *esp = x->data;
-        u32 blksize = crypto_tfm_alg_blocksize(esp->conf.tfm);
+        u32 blksize = ALIGN(crypto_tfm_alg_blocksize(esp->conf.tfm), 4);
 
         if (x->props.mode) {
-                mtu = (mtu + 2 + blksize-1)&~(blksize-1);
+                mtu = ALIGN(mtu + 2, blksize);
         } else {
                 /* The worst case. */
-                mtu += 2 + blksize;
+                mtu = ALIGN(mtu + 2, 4) + blksize - 4;
         }
         if (esp->conf.padlen)
-                mtu = (mtu + esp->conf.padlen-1)&~(esp->conf.padlen-1);
+                mtu = ALIGN(mtu, esp->conf.padlen);
 
         return mtu + x->props.header_len + esp->auth.icv_trunc_len;
 }