diff options
Diffstat (limited to 'net/ipv6/esp6.c')
| -rw-r--r-- | net/ipv6/esp6.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c index 9b27460f0cc..40d9a1935ab 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; } |