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Message-Id: <7301017039d68c920cb9120c035a1a0df3e6b30d.1557322358.git.pabeni@redhat.com> Date: Wed, 8 May 2019 15:32:51 +0200 From: Paolo Abeni <pabeni@...hat.com> To: Paul Moore <paul@...l-moore.com> Cc: selinux@...r.kernel.org, netdev@...r.kernel.org, Tom Deseyn <tdeseyn@...hat.com>, Marcelo Ricardo Leitner <marcelo.leitner@...il.com>, Richard Haines <richard_c_haines@...nternet.com> Subject: [PATCH net] selinux: do not report error on connect(AF_UNSPEC) calling connect(AF_UNSPEC) on an already connected TCP socket is an established way to disconnect() such socket. After commit 68741a8adab9 ("selinux: Fix ltp test connect-syscall failure") it no longer works and, in the above scenario connect() fails with EAFNOSUPPORT. Fix the above falling back to the generic/old code when the address family is not AF_INET{4,6}, but leave the SCTP code path untouched, as it has specific constraints. Fixes: 68741a8adab9 ("selinux: Fix ltp test connect-syscall failure") Reported-by: Tom Deseyn <tdeseyn@...hat.com> Signed-off-by: Paolo Abeni <pabeni@...hat.com> --- security/selinux/hooks.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index c61787b15f27..d82b87c16b0a 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -4649,7 +4649,7 @@ static int selinux_socket_connect_helper(struct socket *sock, struct lsm_network_audit net = {0,}; struct sockaddr_in *addr4 = NULL; struct sockaddr_in6 *addr6 = NULL; - unsigned short snum; + unsigned short snum = 0; u32 sid, perm; /* sctp_connectx(3) calls via selinux_sctp_bind_connect() @@ -4674,12 +4674,12 @@ static int selinux_socket_connect_helper(struct socket *sock, break; default: /* Note that SCTP services expect -EINVAL, whereas - * others expect -EAFNOSUPPORT. + * others must handle this at the protocol level: + * connect(AF_UNSPEC) on a connected socket is + * a documented way disconnect the socket. */ if (sksec->sclass == SECCLASS_SCTP_SOCKET) return -EINVAL; - else - return -EAFNOSUPPORT; } err = sel_netport_sid(sk->sk_protocol, snum, &sid); -- 2.20.1
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