sctp: add verification checks to SCTP_AUTH_KEY option

[profile/ivi/kernel-x86-ivi.git] / net / sctp / auth.c

diff --git a/net/sctp/auth.c b/net/sctp/auth.c
index 675a5c3..1fcb4cf 100644 (file)
--- a/net/sctp/auth.c
+++ b/net/sctp/auth.c
@@ -80,6 +80,10 @@ static struct sctp_auth_bytes *sctp_auth_create_key(__u32 key_len, gfp_t gfp)
 {
        struct sctp_auth_bytes *key;
 
+       /* Verify that we are not going to overflow INT_MAX */
+       if ((INT_MAX - key_len) < sizeof(struct sctp_auth_bytes))
+               return NULL;
+
        /* Allocate the shared key */
        key = kmalloc(sizeof(struct sctp_auth_bytes) + key_len, gfp);
        if (!key)