From: Stephen Smalley Date: Fri, 29 Jul 2005 04:16:21 +0000 (-0700) Subject: [PATCH] selinux: Fix address length checks in connect hook X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=911656f8a630e36b22c7e2bba3317dec9174209c;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git [PATCH] selinux: Fix address length checks in connect hook This patch fixes the address length checks in the selinux_socket_connect hook to be no more restrictive than the underlying ipv4 and ipv6 code; otherwise, this hook can reject valid connect calls. This patch is in response to a bug report where an application was calling connect on an INET6 socket with an address that didn't include the optional scope id and failing due to these checks. Signed-off-by: Stephen Smalley Signed-off-by: James Morris Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 10fd51c9056d..2253f388234f 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -3126,12 +3126,12 @@ static int selinux_socket_connect(struct socket *sock, struct sockaddr *address, if (sk->sk_family == PF_INET) { addr4 = (struct sockaddr_in *)address; - if (addrlen != sizeof(struct sockaddr_in)) + if (addrlen < sizeof(struct sockaddr_in)) return -EINVAL; snum = ntohs(addr4->sin_port); } else { addr6 = (struct sockaddr_in6 *)address; - if (addrlen != sizeof(struct sockaddr_in6)) + if (addrlen < SIN6_LEN_RFC2133) return -EINVAL; snum = ntohs(addr6->sin6_port); }