From owner-svn-src-head@freebsd.org Fri Sep 6 19:40:12 2019 Return-Path: Delivered-To: svn-src-head@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 C2492D5466; Fri, 6 Sep 2019 19:40:12 +0000 (UTC) (envelope-from asomers@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 46Q7F84hZVz4p76; Fri, 6 Sep 2019 19:40:12 +0000 (UTC) (envelope-from asomers@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 7D4AE21BD3; Fri, 6 Sep 2019 19:40:12 +0000 (UTC) (envelope-from asomers@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x86JeCtY068160; Fri, 6 Sep 2019 19:40:12 GMT (envelope-from asomers@FreeBSD.org) Received: (from asomers@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x86JeCLa068157; Fri, 6 Sep 2019 19:40:12 GMT (envelope-from asomers@FreeBSD.org) Message-Id: <201909061940.x86JeCLa068157@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: asomers set sender to asomers@FreeBSD.org using -f From: Alan Somers Date: Fri, 6 Sep 2019 19:40:12 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r351961 - head/sys/fs/fuse X-SVN-Group: head X-SVN-Commit-Author: asomers X-SVN-Commit-Paths: head/sys/fs/fuse X-SVN-Commit-Revision: 351961 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Sep 2019 19:40:12 -0000 Author: asomers Date: Fri Sep 6 19:40:11 2019 New Revision: 351961 URL: https://svnweb.freebsd.org/changeset/base/351961 Log: Coverity fixes in fusefs(5) CID 1404532 fixes a signed vs unsigned comparison error in fuse_vnop_bmap. It could potentially have resulted in VOP_BMAP reporting too many consecutive blocks. CID 1404364 is much worse. It was an array access by an untrusted, user-provided variable. It could potentially have resulted in a malicious file system crashing the kernel or worse. Reported by: Coverity Reviewed by: emaste MFC after: 3 days Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D21466 Modified: head/sys/fs/fuse/fuse_internal.c head/sys/fs/fuse/fuse_vnops.c Modified: head/sys/fs/fuse/fuse_internal.c ============================================================================== --- head/sys/fs/fuse/fuse_internal.c Fri Sep 6 19:36:41 2019 (r351960) +++ head/sys/fs/fuse/fuse_internal.c Fri Sep 6 19:40:11 2019 (r351961) @@ -390,6 +390,9 @@ fuse_internal_invalidate_entry(struct mount *mp, struc if ((err = uiomove(&fnieo, sizeof(fnieo), uio)) != 0) return (err); + if (fnieo.namelen > sizeof(name)) + return (EINVAL); + if ((err = uiomove(name, fnieo.namelen, uio)) != 0) return (err); name[fnieo.namelen] = '\0'; Modified: head/sys/fs/fuse/fuse_vnops.c ============================================================================== --- head/sys/fs/fuse/fuse_vnops.c Fri Sep 6 19:36:41 2019 (r351960) +++ head/sys/fs/fuse/fuse_vnops.c Fri Sep 6 19:40:11 2019 (r351961) @@ -504,7 +504,7 @@ fuse_vnop_bmap(struct vop_bmap_args *ap) if (runp != NULL) { error = fuse_vnode_size(vp, &filesize, td->td_ucred, td); if (error == 0) - *runp = MIN(MAX(0, filesize / biosize - lbn - 1), + *runp = MIN(MAX(0, filesize / (off_t)biosize - lbn - 1), maxrun); else *runp = 0;