From owner-svn-src-stable@freebsd.org Mon Nov 6 11:11:45 2017 Return-Path: Delivered-To: svn-src-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 5D395E5A0D9; Mon, 6 Nov 2017 11:11:45 +0000 (UTC) (envelope-from eugen@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::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 3A04B6A4AA; Mon, 6 Nov 2017 11:11:45 +0000 (UTC) (envelope-from eugen@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id vA6BBixt030142; Mon, 6 Nov 2017 11:11:44 GMT (envelope-from eugen@FreeBSD.org) Received: (from eugen@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id vA6BBilN030141; Mon, 6 Nov 2017 11:11:44 GMT (envelope-from eugen@FreeBSD.org) Message-Id: <201711061111.vA6BBilN030141@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: eugen set sender to eugen@FreeBSD.org using -f From: Eugene Grosbein Date: Mon, 6 Nov 2017 11:11:44 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r325472 - stable/10/libexec/ftpd X-SVN-Group: stable-10 X-SVN-Commit-Author: eugen X-SVN-Commit-Paths: stable/10/libexec/ftpd X-SVN-Commit-Revision: 325472 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 06 Nov 2017 11:11:45 -0000 Author: eugen (ports committer) Date: Mon Nov 6 11:11:44 2017 New Revision: 325472 URL: https://svnweb.freebsd.org/changeset/base/325472 Log: MFC r324364: ftpd(8): fix user context handling Apply authenticated user context after update of wtmp(5) at start of session, so that ftpd process is not killed by kernel with SIGXFSZ when user has "filesize" limit lower than size of system wtmp file. Same applies to session finalization: revert to super-user context before update of wtmp. If ftpd hits limit while writing a file at user request, do not get killed with SIGXFSZ instantly but apparently ignore the signal, process error and report it to the user, and continue with the session. PR: 143570 Approved by: mav (mentor) Modified: stable/10/libexec/ftpd/ftpd.c Modified: stable/10/libexec/ftpd/ftpd.c ============================================================================== --- stable/10/libexec/ftpd/ftpd.c Mon Nov 6 11:10:43 2017 (r325471) +++ stable/10/libexec/ftpd/ftpd.c Mon Nov 6 11:11:44 2017 (r325472) @@ -420,6 +420,10 @@ main(int argc, char *argv[], char **envp) } } + /* handle filesize limit gracefully */ + sa.sa_handler = SIG_IGN; + (void)sigaction(SIGXFSZ, &sa, NULL); + if (daemon_mode) { int *ctl_sock, fd, maxfd = -1, nfds, i; fd_set defreadfds, readfds; @@ -1185,14 +1189,14 @@ end_login(void) #endif (void) seteuid(0); - if (logged_in && dowtmp) - ftpd_logwtmp(wtmpid, NULL, NULL); - pw = NULL; #ifdef LOGIN_CAP setusercontext(NULL, getpwuid(0), 0, LOGIN_SETALL & ~(LOGIN_SETLOGIN | LOGIN_SETUSER | LOGIN_SETGROUP | LOGIN_SETPATH | LOGIN_SETENV)); #endif + if (logged_in && dowtmp) + ftpd_logwtmp(wtmpid, NULL, NULL); + pw = NULL; #ifdef USE_PAM if (pamh) { if ((e = pam_setcred(pamh, PAM_DELETE_CRED)) != PAM_SUCCESS) @@ -1464,7 +1468,7 @@ skip: } } setusercontext(lc, pw, 0, LOGIN_SETALL & - ~(LOGIN_SETUSER | LOGIN_SETPATH | LOGIN_SETENV)); + ~(LOGIN_SETRESOURCES | LOGIN_SETUSER | LOGIN_SETPATH | LOGIN_SETENV)); #else setlogin(pw->pw_name); (void) initgroups(pw->pw_name, pw->pw_gid); @@ -1506,6 +1510,10 @@ skip: (struct sockaddr *)&his_addr); logged_in = 1; +#ifdef LOGIN_CAP + setusercontext(lc, pw, 0, LOGIN_SETRESOURCES); +#endif + if (guest && stats && statfd < 0) #ifdef VIRTUAL_HOSTING statfd = open(thishost->statfile, O_WRONLY|O_APPEND); @@ -2756,6 +2764,11 @@ dologout(int status) if (logged_in && dowtmp) { (void) seteuid(0); +#ifdef LOGIN_CAP + setusercontext(NULL, getpwuid(0), 0, LOGIN_SETALL & ~(LOGIN_SETLOGIN | + LOGIN_SETUSER | LOGIN_SETGROUP | LOGIN_SETPATH | + LOGIN_SETENV)); +#endif ftpd_logwtmp(wtmpid, NULL, NULL); } /* beware of flushing buffers after a SIGPIPE */