ah: use crypto_memneq to check the ICV

Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

2 files changed, 6 insertions, 4 deletions

diff --git a/net/ipv4/ah4.c b/net/ipv4/ah4.c
index 22377c8ff14b..207350b30f88 100644
--- a/net/ipv4/ah4.c
+++ b/net/ipv4/ah4.c
@@ -1,5 +1,6 @@
 #define pr_fmt(fmt) "IPsec: " fmt
 
+#include <crypto/algapi.h>
 #include <crypto/hash.h>
 #include <linux/err.h>
 #include <linux/module.h>
@@ -277,7 +278,7 @@ static void ah_input_done(struct crypto_async_request *base, int err)
         auth_data = ah_tmp_auth(work_iph, ihl);
         icv = ah_tmp_icv(ahp->ahash, auth_data, ahp->icv_trunc_len);
 
-        err = memcmp(icv, auth_data, ahp->icv_trunc_len) ? -EBADMSG: 0;
+        err = crypto_memneq(icv, auth_data, ahp->icv_trunc_len) ? -EBADMSG : 0;
         if (err)
                 goto out;
 
@@ -413,7 +414,7 @@ static int ah_input(struct xfrm_state *x, struct sk_buff *skb)
                 goto out_free;
         }
 
-        err = memcmp(icv, auth_data, ahp->icv_trunc_len) ? -EBADMSG: 0;
+        err = crypto_memneq(icv, auth_data, ahp->icv_trunc_len) ? -EBADMSG : 0;
         if (err)
                 goto out_free;
 
diff --git a/net/ipv6/ah6.c b/net/ipv6/ah6.c
index dda6035e3b84..ac747b13a8dc 100644
--- a/net/ipv6/ah6.c
+++ b/net/ipv6/ah6.c
@@ -25,6 +25,7 @@
 
 #define pr_fmt(fmt) "IPv6: " fmt
 
+#include <crypto/algapi.h>
 #include <crypto/hash.h>
 #include <linux/module.h>
 #include <linux/slab.h>
@@ -481,7 +482,7 @@ static void ah6_input_done(struct crypto_async_request *base, int err)
         auth_data = ah_tmp_auth(work_iph, hdr_len);
         icv = ah_tmp_icv(ahp->ahash, auth_data, ahp->icv_trunc_len);
 
-        err = memcmp(icv, auth_data, ahp->icv_trunc_len) ? -EBADMSG : 0;
+        err = crypto_memneq(icv, auth_data, ahp->icv_trunc_len) ? -EBADMSG : 0;
         if (err)
                 goto out;
 
@@ -627,7 +628,7 @@ static int ah6_input(struct xfrm_state *x, struct sk_buff *skb)
                 goto out_free;
         }
 
-        err = memcmp(icv, auth_data, ahp->icv_trunc_len) ? -EBADMSG : 0;
+        err = crypto_memneq(icv, auth_data, ahp->icv_trunc_len) ? -EBADMSG : 0;
         if (err)
                 goto out_free;