From owner-svn-src-all@FreeBSD.ORG Sat Mar 14 18:11:25 2015 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id C7C2DE7A; Sat, 14 Mar 2015 18:11:25 +0000 (UTC) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id B2C68EB1; Sat, 14 Mar 2015 18:11:25 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.9/8.14.9) with ESMTP id t2EIBPmf006505; Sat, 14 Mar 2015 18:11:25 GMT (envelope-from ian@FreeBSD.org) Received: (from ian@localhost) by svn.freebsd.org (8.14.9/8.14.9/Submit) id t2EIBPeE006504; Sat, 14 Mar 2015 18:11:25 GMT (envelope-from ian@FreeBSD.org) Message-Id: <201503141811.t2EIBPeE006504@svn.freebsd.org> X-Authentication-Warning: svn.freebsd.org: ian set sender to ian@FreeBSD.org using -f From: Ian Lepore Date: Sat, 14 Mar 2015 18:11:25 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r279997 - head/sys/netinet X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 14 Mar 2015 18:11:25 -0000 Author: ian Date: Sat Mar 14 18:11:24 2015 New Revision: 279997 URL: https://svnweb.freebsd.org/changeset/base/279997 Log: Use sbuf_new_for_sysctl() instead of plain sbuf_new() to ensure sysctl string returned to userland is nulterminated. PR: 195668 Modified: head/sys/netinet/tcp_hostcache.c Modified: head/sys/netinet/tcp_hostcache.c ============================================================================== --- head/sys/netinet/tcp_hostcache.c Sat Mar 14 17:35:04 2015 (r279996) +++ head/sys/netinet/tcp_hostcache.c Sat Mar 14 18:11:24 2015 (r279997) @@ -596,7 +596,7 @@ tcp_hc_update(struct in_conninfo *inc, s static int sysctl_tcp_hc_list(SYSCTL_HANDLER_ARGS) { - int linesize = 128; + const int linesize = 128; struct sbuf sb; int i, error; struct hc_metrics *hc_entry; @@ -604,8 +604,7 @@ sysctl_tcp_hc_list(SYSCTL_HANDLER_ARGS) char ip6buf[INET6_ADDRSTRLEN]; #endif - sbuf_new(&sb, NULL, linesize * (V_tcp_hostcache.cache_count + 1), - SBUF_FIXEDLEN); + sbuf_new_for_sysctl(&sb, NULL, linesize, req); sbuf_printf(&sb, "\nIP address MTU SSTRESH RTT RTTVAR BANDWIDTH " @@ -642,8 +641,7 @@ sysctl_tcp_hc_list(SYSCTL_HANDLER_ARGS) THC_UNLOCK(&V_tcp_hostcache.hashbase[i].hch_mtx); } #undef msec - sbuf_finish(&sb); - error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); + error = sbuf_finish(&sb); sbuf_delete(&sb); return(error); }