From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcelo Ricardo Leitner Subject: Re: [PATCH net] sctp: do not check port in sctp_inet6_cmp_addr Date: Wed, 11 Apr 2018 11:42:41 -0300 Message-ID: <20180411144241.GA3711@localhost.localdomain> References: <340aad3be762046ca9d02e54edba5bfefa2f4e71.1523451485.git.lucien.xin@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: network dev , linux-sctp@vger.kernel.org, davem@davemloft.net, Neil Horman To: Xin Long Return-path: Received: from mail-qt0-f180.google.com ([209.85.216.180]:39374 "EHLO mail-qt0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753169AbeDKOmq (ORCPT ); Wed, 11 Apr 2018 10:42:46 -0400 Content-Disposition: inline In-Reply-To: <340aad3be762046ca9d02e54edba5bfefa2f4e71.1523451485.git.lucien.xin@gmail.com> Sender: netdev-owner@vger.kernel.org List-ID: On Wed, Apr 11, 2018 at 08:58:05PM +0800, Xin Long wrote: > pf->cmp_addr() is called before binding a v6 address to the sock. It > should not check ports, like in sctp_inet_cmp_addr. > > But sctp_inet6_cmp_addr checks the addr by invoking af(6)->cmp_addr, > sctp_v6_cmp_addr where it also compares the ports. > > This would cause that setsockopt(SCTP_SOCKOPT_BINDX_ADD) could bind > multiple duplicated IPv6 addresses after Commit 40b4f0fd74e4 ("sctp: > lack the check for ports in sctp_v6_cmp_addr"). > > This patch is to remove af->cmp_addr called in sctp_inet6_cmp_addr, > but do the proper check for both v6 addrs and v4mapped addrs. > > Fixes: 40b4f0fd74e4 ("sctp: lack the check for ports in sctp_v6_cmp_addr") > Reported-by: Jianwen Ji > Signed-off-by: Xin Long Acked-by: Marcelo Ricardo Leitner From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcelo Ricardo Leitner Date: Wed, 11 Apr 2018 14:42:41 +0000 Subject: Re: [PATCH net] sctp: do not check port in sctp_inet6_cmp_addr Message-Id: <20180411144241.GA3711@localhost.localdomain> List-Id: References: <340aad3be762046ca9d02e54edba5bfefa2f4e71.1523451485.git.lucien.xin@gmail.com> In-Reply-To: <340aad3be762046ca9d02e54edba5bfefa2f4e71.1523451485.git.lucien.xin@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Xin Long Cc: network dev , linux-sctp@vger.kernel.org, davem@davemloft.net, Neil Horman On Wed, Apr 11, 2018 at 08:58:05PM +0800, Xin Long wrote: > pf->cmp_addr() is called before binding a v6 address to the sock. It > should not check ports, like in sctp_inet_cmp_addr. > > But sctp_inet6_cmp_addr checks the addr by invoking af(6)->cmp_addr, > sctp_v6_cmp_addr where it also compares the ports. > > This would cause that setsockopt(SCTP_SOCKOPT_BINDX_ADD) could bind > multiple duplicated IPv6 addresses after Commit 40b4f0fd74e4 ("sctp: > lack the check for ports in sctp_v6_cmp_addr"). > > This patch is to remove af->cmp_addr called in sctp_inet6_cmp_addr, > but do the proper check for both v6 addrs and v4mapped addrs. > > Fixes: 40b4f0fd74e4 ("sctp: lack the check for ports in sctp_v6_cmp_addr") > Reported-by: Jianwen Ji > Signed-off-by: Xin Long Acked-by: Marcelo Ricardo Leitner