From c68e747d0a98f44a4e49071940a692fa83630e47 Mon Sep 17 00:00:00 2001 From: Tetsuo Handa Date: Fri, 12 Apr 2019 19:55:14 +0900 Subject: llc: Check address length before reading address field KMSAN will complain if valid address length passed to bind() is shorter than sizeof(struct sockaddr_llc) bytes. Signed-off-by: Tetsuo Handa Signed-off-by: David S. Miller --- net/llc/af_llc.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/net/llc/af_llc.c b/net/llc/af_llc.c index b99e73a7e7e0..2017b7d780f5 100644 --- a/net/llc/af_llc.c +++ b/net/llc/af_llc.c @@ -320,14 +320,13 @@ static int llc_ui_bind(struct socket *sock, struct sockaddr *uaddr, int addrlen) struct llc_sap *sap; int rc = -EINVAL; - dprintk("%s: binding %02X\n", __func__, addr->sllc_sap); - lock_sock(sk); if (unlikely(!sock_flag(sk, SOCK_ZAPPED) || addrlen != sizeof(*addr))) goto out; rc = -EAFNOSUPPORT; if (unlikely(addr->sllc_family != AF_LLC)) goto out; + dprintk("%s: binding %02X\n", __func__, addr->sllc_sap); rc = -ENODEV; rcu_read_lock(); if (sk->sk_bound_dev_if) { -- cgit v1.2.3