From owner-svn-src-stable-12@freebsd.org Mon Mar 11 02:42:50 2019 Return-Path: Delivered-To: svn-src-stable-12@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 9BBD31529801; Mon, 11 Mar 2019 02:42:50 +0000 (UTC) (envelope-from sef@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4202D7480B; Mon, 11 Mar 2019 02:42:50 +0000 (UTC) (envelope-from sef@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 mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 346A047E8; Mon, 11 Mar 2019 02:42:50 +0000 (UTC) (envelope-from sef@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x2B2goSi032897; Mon, 11 Mar 2019 02:42:50 GMT (envelope-from sef@FreeBSD.org) Received: (from sef@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x2B2gnNE032896; Mon, 11 Mar 2019 02:42:49 GMT (envelope-from sef@FreeBSD.org) Message-Id: <201903110242.x2B2gnNE032896@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: sef set sender to sef@FreeBSD.org using -f From: Sean Eric Fagan Date: Mon, 11 Mar 2019 02:42:49 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r344995 - in stable/12: sys/kgssapi usr.sbin/gssd X-SVN-Group: stable-12 X-SVN-Commit-Author: sef X-SVN-Commit-Paths: in stable/12: sys/kgssapi usr.sbin/gssd X-SVN-Commit-Revision: 344995 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 4202D7480B X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.93 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-0.99)[-0.994,0]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; NEURAL_HAM_SHORT(-0.94)[-0.936,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US] X-BeenThere: svn-src-stable-12@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for only the 12-stable src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 11 Mar 2019 02:42:50 -0000 Author: sef Date: Mon Mar 11 02:42:49 2019 New Revision: 344995 URL: https://svnweb.freebsd.org/changeset/base/344995 Log: MFC r344402 * Handle SIGPIPE in gssd We've got some cases where the other end of gssd's AF_LOCAL socket gets closed, resulting in an error (and SIGPIPE) when it tries to do I/O to it. Closing without cleaning up means the next time nfsd starts up, it hangs, unkillably; this allows gssd to handle that particular error. * Limit the retry cound in gssd_syscall to 5. The default is INT_MAX, which effectively means forever. And it's an uninterruptable RPC call, so it will never stop. The two changes mitigate the problem. Modified: stable/12/sys/kgssapi/gss_impl.c stable/12/usr.sbin/gssd/gssd.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/kgssapi/gss_impl.c ============================================================================== --- stable/12/sys/kgssapi/gss_impl.c Mon Mar 11 02:02:04 2019 (r344994) +++ stable/12/sys/kgssapi/gss_impl.c Mon Mar 11 02:42:49 2019 (r344995) @@ -112,6 +112,15 @@ sys_gssd_syscall(struct thread *td, struct gssd_syscal cl = clnt_reconnect_create(nconf, (struct sockaddr *) &sun, GSSD, GSSDVERS, RPC_MAXDATASIZE, RPC_MAXDATASIZE); + /* + * The number of retries defaults to INT_MAX, which effectively + * means an infinite, uninterruptable loop. Limiting it to + * five retries keeps it from running forever. + */ + if (cl != NULL) { + int retry_count = 5; + CLNT_CONTROL(cl, CLSET_RETRIES, &retry_count); + } } else cl = NULL; Modified: stable/12/usr.sbin/gssd/gssd.c ============================================================================== --- stable/12/usr.sbin/gssd/gssd.c Mon Mar 11 02:02:04 2019 (r344994) +++ stable/12/usr.sbin/gssd/gssd.c Mon Mar 11 02:42:49 2019 (r344995) @@ -202,6 +202,7 @@ main(int argc, char **argv) signal(SIGHUP, SIG_IGN); } signal(SIGTERM, gssd_terminate); + signal(SIGPIPE, gssd_terminate); memset(&sun, 0, sizeof sun); sun.sun_family = AF_LOCAL;