From patchwork Sun Aug 14 22:20:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Khem Raj X-Patchwork-Id: 11380 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 71501C282E7 for ; Sun, 14 Aug 2022 22:20:57 +0000 (UTC) Received: from mail-pl1-f172.google.com (mail-pl1-f172.google.com [209.85.214.172]) by mx.groups.io with SMTP id smtpd.web08.10088.1660515649439096070 for ; Sun, 14 Aug 2022 15:20:49 -0700 Authentication-Results: mx.groups.io; dkim=pass header.i=@gmail.com header.s=20210112 header.b=HDR0/Qle; spf=pass (domain: gmail.com, ip: 209.85.214.172, mailfrom: raj.khem@gmail.com) Received: by mail-pl1-f172.google.com with SMTP id d10so5007622plr.6 for ; Sun, 14 Aug 2022 15:20:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc; bh=KGEyZXYYPwjkKEstCE7ZjKEtnZ+K9JRXdjkIA/JVblI=; b=HDR0/QlehssU4gTkG9cuDz33xgO+GS3jbSTxdwXb860LIBhdoGxxZFIuKNS7Fd9Fiz drQbcYRvsGJ/owK5JXk0CFAnWSILaFzQEWO1d2CCMQZVi2P7E0BvMy197qtojBaYHvDj uB3T52eIyDNHgzPzuishp9hGorN9JxAhrtNN2uGZHdZwA63xTvJFEB2LThdmJ5coKxPJ ozpVWpPFgg0DSprAtVN0hc+nJBFPk+qdztfDeyIAMqbt7QKU0hi7NpbKkHTwa4FZp54c 5JGU5BjKOIjG7Gap0IFUulM5y6mxjGw7PQbHOpGkEL3Mcx9f/0tr7L3yVf+I8RMbrK+V foqw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc; bh=KGEyZXYYPwjkKEstCE7ZjKEtnZ+K9JRXdjkIA/JVblI=; b=dniQVjQJHG81mne2qCz0nYY4uvoKbBuyqTd6tKzOXix/RPT2kb9OoGubGU/mkLBqVf F9pP8XsO4fhOAB6Yq5ORAiM01AVvo5rVNh8V2micaXR6ONOEaaqrrPpVcKyyVHeAYc2y xAA7EurLWhiGvSOVwCrIU+9N72yy9dNj42n7SQO7c4yvMJ0DgKouSPwqzgLCOaDhRFZJ 9hLwA6/CH6/pHCItFerYR1+QcMec3J3u9KECpSQQItJ1zVavhbTBg5HLM35xoPmPrWwk fIGHJfPFFB4sdKcxmXTsgLPN1CPyV72iOsJTfHYeZNPIZXJz+BbijwXgrZa4PJ7ZgtN4 tMwA== X-Gm-Message-State: ACgBeo21WLswDSwtrj+nosoM1plhSOSHvqsRMFINgeCkUkmQ5mvrnO2k 88ZPbx9fFZ7zrswF4wfeDAl6Jj3BTohOJA== X-Google-Smtp-Source: AA6agR6IKlGYOt/rALnPqHtaucxDcRsLgdx53zu/Z5YeX+Lb5Ij9rUj+dmHSWxvmwUldEp7AtXrelA== X-Received: by 2002:a17:90a:df96:b0:1f3:22e:7826 with SMTP id p22-20020a17090adf9600b001f3022e7826mr14758466pjv.21.1660515647926; Sun, 14 Aug 2022 15:20:47 -0700 (PDT) Received: from apollo.hsd1.ca.comcast.net ([2601:646:9200:a0f0::bb7a]) by smtp.gmail.com with ESMTPSA id k15-20020a170902d58f00b0016d8b0dfd61sm5819502plh.178.2022.08.14.15.20.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 14 Aug 2022 15:20:47 -0700 (PDT) From: Khem Raj To: openembedded-core@lists.openembedded.org Cc: Khem Raj Subject: [PATCH 07/10] libtirpc: Backport fix for CVE-2021-46828 Date: Sun, 14 Aug 2022 15:20:34 -0700 Message-Id: <20220814222037.283943-7-raj.khem@gmail.com> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220814222037.283943-1-raj.khem@gmail.com> References: <20220814222037.283943-1-raj.khem@gmail.com> MIME-Version: 1.0 List-Id: X-Webhook-Received: from li982-79.members.linode.com [45.33.32.79] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Sun, 14 Aug 2022 22:20:57 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/169334 CVE: CVE-2021-46828 Signed-off-by: Khem Raj --- .../libtirpc/libtirpc/CVE-2021-46828.patch | 565 ++++++++++++++++++ .../libtirpc/libtirpc_1.3.2.bb | 4 +- 2 files changed, 568 insertions(+), 1 deletion(-) create mode 100644 meta/recipes-extended/libtirpc/libtirpc/CVE-2021-46828.patch diff --git a/meta/recipes-extended/libtirpc/libtirpc/CVE-2021-46828.patch b/meta/recipes-extended/libtirpc/libtirpc/CVE-2021-46828.patch new file mode 100644 index 00000000000..64dffb923b9 --- /dev/null +++ b/meta/recipes-extended/libtirpc/libtirpc/CVE-2021-46828.patch @@ -0,0 +1,565 @@ +From 86529758570cef4c73fb9b9c4104fdc510f701ed Mon Sep 17 00:00:00 2001 +From: Dai Ngo +Date: Sat, 21 Aug 2021 13:16:23 -0400 +Subject: [PATCH] Fix DoS vulnerability in libtirpc + +Currently svc_run does not handle poll timeout and rendezvous_request +does not handle EMFILE error returned from accept(2 as it used to. +These two missing functionality were removed by commit b2c9430f46c4. + +The effect of not handling poll timeout allows idle TCP conections +to remain ESTABLISHED indefinitely. When the number of connections +reaches the limit of the open file descriptors (ulimit -n) then +accept(2) fails with EMFILE. Since there is no handling of EMFILE +error this causes svc_run() to get in a tight loop calling accept(2). +This resulting in the RPC service of svc_run is being down, it's +no longer able to service any requests. + +RPC service rpcbind, statd and mountd are effected by this +problem. + +Fix by enhancing rendezvous_request to keep the number of +SVCXPRT conections to 4/5 of the size of the file descriptor +table. When this thresold is reached, it destroys the idle +TCP connections or destroys the least active connection if +no idle connnction was found. + +Fixes: 44bf15b8 rpcbind: don't use obsolete svc_fdset interface of libtirpc + +CVE: CVE-2021-46828 +Upstream-Status: Backport [http://git.linux-nfs.org/?p=steved/libtirpc.git;a=commit;h=86529758570cef4c73fb9b9c4104fdc510f701ed] +Signed-off-by: dai.ngo@oracle.com +Signed-off-by: Steve Dickson +--- + INSTALL | 371 +---------------------------------------------------------- + src/svc.c | 17 ++- + src/svc_vc.c | 62 +++++++++- + 3 files changed, 78 insertions(+), 372 deletions(-) + mode change 100644 => 120000 INSTALL + +diff --git a/INSTALL b/INSTALL +deleted file mode 100644 +index 2099840..0000000 +--- a/INSTALL ++++ /dev/null +@@ -1,370 +0,0 @@ +-Installation Instructions +-************************* +- +-Copyright (C) 1994-1996, 1999-2002, 2004-2013 Free Software Foundation, +-Inc. +- +- Copying and distribution of this file, with or without modification, +-are permitted in any medium without royalty provided the copyright +-notice and this notice are preserved. 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Until the limitation is lifted, you can use +-this workaround: +- +- CONFIG_SHELL=/bin/bash ./configure CONFIG_SHELL=/bin/bash +- +-`configure' Invocation +-====================== +- +- `configure' recognizes the following options to control how it +-operates. +- +-`--help' +-`-h' +- Print a summary of all of the options to `configure', and exit. +- +-`--help=short' +-`--help=recursive' +- Print a summary of the options unique to this package's +- `configure', and exit. The `short' variant lists options used +- only in the top level, while the `recursive' variant lists options +- also present in any nested packages. +- +-`--version' +-`-V' +- Print the version of Autoconf used to generate the `configure' +- script, and exit. +- +-`--cache-file=FILE' +- Enable the cache: use and save the results of the tests in FILE, +- traditionally `config.cache'. FILE defaults to `/dev/null' to +- disable caching. +- +-`--config-cache' +-`-C' +- Alias for `--cache-file=config.cache'. +- +-`--quiet' +-`--silent' +-`-q' +- Do not print messages saying which checks are being made. To +- suppress all normal output, redirect it to `/dev/null' (any error +- messages will still be shown). +- +-`--srcdir=DIR' +- Look for the package's source code in directory DIR. Usually +- `configure' can determine that directory automatically. +- +-`--prefix=DIR' +- Use DIR as the installation prefix. *note Installation Names:: +- for more details, including other options available for fine-tuning +- the installation locations. +- +-`--no-create' +-`-n' +- Run the configure checks, but stop before creating any output +- files. +- +-`configure' also accepts some other, not widely useful, options. Run +-`configure --help' for more details. +diff --git a/INSTALL b/INSTALL +new file mode 120000 +index 0000000..e3f22c0 +--- /dev/null ++++ b/INSTALL +@@ -0,0 +1 @@ ++/usr/share/automake-1.16/INSTALL +\ No newline at end of file +diff --git a/src/svc.c b/src/svc.c +index 6db164b..3a8709f 100644 +--- a/src/svc.c ++++ b/src/svc.c +@@ -57,7 +57,7 @@ + + #define max(a, b) (a > b ? a : b) + +-static SVCXPRT **__svc_xports; ++SVCXPRT **__svc_xports; + int __svc_maxrec; + + /* +@@ -194,6 +194,21 @@ __xprt_do_unregister (xprt, dolock) + rwlock_unlock (&svc_fd_lock); + } + ++int ++svc_open_fds() ++{ ++ int ix; ++ int nfds = 0; ++ ++ rwlock_rdlock (&svc_fd_lock); ++ for (ix = 0; ix < svc_max_pollfd; ++ix) { ++ if (svc_pollfd[ix].fd != -1) ++ nfds++; ++ } ++ rwlock_unlock (&svc_fd_lock); ++ return (nfds); ++} ++ + /* + * Add a service program to the callout list. + * The dispatch routine will be called when a rpc request for this +diff --git a/src/svc_vc.c b/src/svc_vc.c +index f1d9f00..3dc8a75 100644 +--- a/src/svc_vc.c ++++ b/src/svc_vc.c +@@ -64,6 +64,8 @@ + + + extern rwlock_t svc_fd_lock; ++extern SVCXPRT **__svc_xports; ++extern int svc_open_fds(); + + static SVCXPRT *makefd_xprt(int, u_int, u_int); + static bool_t rendezvous_request(SVCXPRT *, struct rpc_msg *); +@@ -82,6 +84,7 @@ static void svc_vc_ops(SVCXPRT *); + static bool_t svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in); + static bool_t svc_vc_rendezvous_control (SVCXPRT *xprt, const u_int rq, + void *in); ++static int __svc_destroy_idle(int timeout); + + struct cf_rendezvous { /* kept in xprt->xp_p1 for rendezvouser */ + u_int sendsize; +@@ -313,13 +316,14 @@ done: + return (xprt); + } + ++ + /*ARGSUSED*/ + static bool_t + rendezvous_request(xprt, msg) + SVCXPRT *xprt; + struct rpc_msg *msg; + { +- int sock, flags; ++ int sock, flags, nfds, cnt; + struct cf_rendezvous *r; + struct cf_conn *cd; + struct sockaddr_storage addr; +@@ -379,6 +383,16 @@ again: + + gettimeofday(&cd->last_recv_time, NULL); + ++ nfds = svc_open_fds(); ++ if (nfds >= (_rpc_dtablesize() / 5) * 4) { ++ /* destroy idle connections */ ++ cnt = __svc_destroy_idle(15); ++ if (cnt == 0) { ++ /* destroy least active */ ++ __svc_destroy_idle(0); ++ } ++ } ++ + return (FALSE); /* there is never an rpc msg to be processed */ + } + +@@ -820,3 +834,49 @@ __svc_clean_idle(fd_set *fds, int timeout, bool_t cleanblock) + { + return FALSE; + } ++ ++static int ++__svc_destroy_idle(int timeout) ++{ ++ int i, ncleaned = 0; ++ SVCXPRT *xprt, *least_active; ++ struct timeval tv, tdiff, tmax; ++ struct cf_conn *cd; ++ ++ gettimeofday(&tv, NULL); ++ tmax.tv_sec = tmax.tv_usec = 0; ++ least_active = NULL; ++ rwlock_wrlock(&svc_fd_lock); ++ ++ for (i = 0; i <= svc_max_pollfd; i++) { ++ if (svc_pollfd[i].fd == -1) ++ continue; ++ xprt = __svc_xports[i]; ++ if (xprt == NULL || xprt->xp_ops == NULL || ++ xprt->xp_ops->xp_recv != svc_vc_recv) ++ continue; ++ cd = (struct cf_conn *)xprt->xp_p1; ++ if (!cd->nonblock) ++ continue; ++ if (timeout == 0) { ++ timersub(&tv, &cd->last_recv_time, &tdiff); ++ if (timercmp(&tdiff, &tmax, >)) { ++ tmax = tdiff; ++ least_active = xprt; ++ } ++ continue; ++ } ++ if (tv.tv_sec - cd->last_recv_time.tv_sec > timeout) { ++ __xprt_unregister_unlocked(xprt); ++ __svc_vc_dodestroy(xprt); ++ ncleaned++; ++ } ++ } ++ if (timeout == 0 && least_active != NULL) { ++ __xprt_unregister_unlocked(least_active); ++ __svc_vc_dodestroy(least_active); ++ ncleaned++; ++ } ++ rwlock_unlock(&svc_fd_lock); ++ return (ncleaned); ++} +-- +1.8.3.1 + diff --git a/meta/recipes-extended/libtirpc/libtirpc_1.3.2.bb b/meta/recipes-extended/libtirpc/libtirpc_1.3.2.bb index 45b3d2befc3..cc87638c0f7 100644 --- a/meta/recipes-extended/libtirpc/libtirpc_1.3.2.bb +++ b/meta/recipes-extended/libtirpc/libtirpc_1.3.2.bb @@ -9,7 +9,9 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=f835cce8852481e4b2bbbdd23b5e47f3 \ PROVIDES = "virtual/librpc" -SRC_URI = "${SOURCEFORGE_MIRROR}/${BPN}/${BP}.tar.bz2" +SRC_URI = "${SOURCEFORGE_MIRROR}/${BPN}/${BP}.tar.bz2 \ + file://CVE-2021-46828.patch \ + " UPSTREAM_CHECK_URI = "https://sourceforge.net/projects/libtirpc/files/libtirpc/" UPSTREAM_CHECK_REGEX = "(?P\d+(\.\d+)+)/" SRC_URI[sha256sum] = "e24eb88b8ce7db3b7ca6eb80115dd1284abc5ec32a8deccfed2224fc2532b9fd"