From mboxrd@z Thu Jan 1 00:00:00 1970 From: Herbert Xu Subject: [PATCH 2/4] crypto: af_alg - Allow arbitrarily long algorithm names Date: Thu, 06 Apr 2017 16:16:09 +0800 Message-ID: References: <20170406081509.GB30557@gondor.apana.org.au> To: Alexander Sverdlin , "David S. Miller" , linux-crypto@vger.kernel.org, netdev@vger.kernel.org Return-path: Sender: linux-crypto-owner@vger.kernel.org List-Id: netdev.vger.kernel.org This patch removes the hard-coded 64-byte limit on the length of the algorithm name through bind(2). The address length can now exceed that. The user-space structure remains unchanged. In order to use a longer name simply extend the salg_name array beyond its defined 64 bytes length. Signed-off-by: Herbert Xu --- crypto/af_alg.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/crypto/af_alg.c b/crypto/af_alg.c index 690deca..3556d8e 100644 --- a/crypto/af_alg.c +++ b/crypto/af_alg.c @@ -160,11 +160,11 @@ static int alg_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) if (sock->state == SS_CONNECTED) return -EINVAL; - if (addr_len != sizeof(*sa)) + if (addr_len < sizeof(*sa)) return -EINVAL; sa->salg_type[sizeof(sa->salg_type) - 1] = 0; - sa->salg_name[sizeof(sa->salg_name) - 1] = 0; + sa->salg_name[sizeof(sa->salg_name) + addr_len - sizeof(*sa) - 1] = 0; type = alg_get_type(sa->salg_type); if (IS_ERR(type) && PTR_ERR(type) == -ENOENT) {