From owner-svn-src-all@freebsd.org Tue Jan 28 18:54:16 2020 Return-Path: Delivered-To: svn-src-all@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id F22F5237C08; Tue, 28 Jan 2020 18:54:15 +0000 (UTC) (envelope-from gordon@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 486bPg6Bf0z4NPq; Tue, 28 Jan 2020 18:54:15 +0000 (UTC) (envelope-from gordon@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 CFC0A278C0; Tue, 28 Jan 2020 18:54:15 +0000 (UTC) (envelope-from gordon@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 00SIsFt3037697; Tue, 28 Jan 2020 18:54:15 GMT (envelope-from gordon@FreeBSD.org) Received: (from gordon@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 00SIsFLG037695; Tue, 28 Jan 2020 18:54:15 GMT (envelope-from gordon@FreeBSD.org) Message-Id: <202001281854.00SIsFLG037695@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: gordon set sender to gordon@FreeBSD.org using -f From: Gordon Tetlow Date: Tue, 28 Jan 2020 18:54:15 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-releng@freebsd.org Subject: svn commit: r357216 - in releng: 11.3/sys/kern 12.0/sys/kern X-SVN-Group: releng X-SVN-Commit-Author: gordon X-SVN-Commit-Paths: in releng: 11.3/sys/kern 12.0/sys/kern X-SVN-Commit-Revision: 357216 X-SVN-Commit-Repository: base 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: 2.1.29 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: Tue, 28 Jan 2020 18:54:16 -0000 Author: gordon Date: Tue Jan 28 18:54:15 2020 New Revision: 357216 URL: https://svnweb.freebsd.org/changeset/base/357216 Log: Fix nmount invalid pointer dereference Submitted by: Andrew Turner Approved by: so Security: FreeBSD-EN-20:02.nmount Modified: releng/11.3/sys/kern/vfs_mount.c releng/12.0/sys/kern/vfs_mount.c Modified: releng/11.3/sys/kern/vfs_mount.c ============================================================================== --- releng/11.3/sys/kern/vfs_mount.c Tue Jan 28 18:53:14 2020 (r357215) +++ releng/11.3/sys/kern/vfs_mount.c Tue Jan 28 18:54:15 2020 (r357216) @@ -591,7 +591,7 @@ vfs_donmount(struct thread *td, uint64_t fsflags, stru */ fstypelen = 0; error = vfs_getopt(optlist, "fstype", (void **)&fstype, &fstypelen); - if (error || fstype[fstypelen - 1] != '\0') { + if (error || fstypelen <= 0 || fstype[fstypelen - 1] != '\0') { error = EINVAL; if (errmsg != NULL) strncpy(errmsg, "Invalid fstype", errmsg_len); @@ -599,7 +599,7 @@ vfs_donmount(struct thread *td, uint64_t fsflags, stru } fspathlen = 0; error = vfs_getopt(optlist, "fspath", (void **)&fspath, &fspathlen); - if (error || fspath[fspathlen - 1] != '\0') { + if (error || fspathlen <= 0 || fspath[fspathlen - 1] != '\0') { error = EINVAL; if (errmsg != NULL) strncpy(errmsg, "Invalid fspath", errmsg_len); Modified: releng/12.0/sys/kern/vfs_mount.c ============================================================================== --- releng/12.0/sys/kern/vfs_mount.c Tue Jan 28 18:53:14 2020 (r357215) +++ releng/12.0/sys/kern/vfs_mount.c Tue Jan 28 18:54:15 2020 (r357216) @@ -603,7 +603,7 @@ vfs_donmount(struct thread *td, uint64_t fsflags, stru */ fstypelen = 0; error = vfs_getopt(optlist, "fstype", (void **)&fstype, &fstypelen); - if (error || fstype[fstypelen - 1] != '\0') { + if (error || fstypelen <= 0 || fstype[fstypelen - 1] != '\0') { error = EINVAL; if (errmsg != NULL) strncpy(errmsg, "Invalid fstype", errmsg_len); @@ -611,7 +611,7 @@ vfs_donmount(struct thread *td, uint64_t fsflags, stru } fspathlen = 0; error = vfs_getopt(optlist, "fspath", (void **)&fspath, &fspathlen); - if (error || fspath[fspathlen - 1] != '\0') { + if (error || fspathlen <= 0 || fspath[fspathlen - 1] != '\0') { error = EINVAL; if (errmsg != NULL) strncpy(errmsg, "Invalid fspath", errmsg_len);