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Diffstat (limited to 'net/ipv6/esp6.c')
-rw-r--r--net/ipv6/esp6.c18
1 files changed, 10 insertions, 8 deletions
diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c
index 9b27460f0cc7..40d9a1935ab5 100644
--- a/net/ipv6/esp6.c
+++ b/net/ipv6/esp6.c
@@ -31,6 +31,7 @@
#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>
@@ -66,10 +67,10 @@ static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
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;
@@ -133,7 +134,7 @@ static int esp6_input(struct xfrm_state *x, struct xfrm_decap_state *decap, stru
struct ipv6_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 ipv6_esp_hdr) - esp->conf.ivlen - alen;
@@ -235,16 +236,17 @@ out_nofree:
static u32 esp6_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;
+ u32 padsize = ((blksize - 1) & 7) + 1;
+ mtu = ALIGN(mtu + 2, padsize) + blksize - padsize;
}
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_full_len;
}