From owner-svn-src-stable@freebsd.org Wed Nov 28 21:20:00 2018 Return-Path: Delivered-To: svn-src-stable@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 566CA113D9D1; Wed, 28 Nov 2018 21:20:00 +0000 (UTC) (envelope-from vangyzen@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id E9D1B8970B; Wed, 28 Nov 2018 21:19:59 +0000 (UTC) (envelope-from vangyzen@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 C4EBD7DE2; Wed, 28 Nov 2018 21:19:59 +0000 (UTC) (envelope-from vangyzen@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id wASLJx5v033507; Wed, 28 Nov 2018 21:19:59 GMT (envelope-from vangyzen@FreeBSD.org) Received: (from vangyzen@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id wASLJxuY033505; Wed, 28 Nov 2018 21:19:59 GMT (envelope-from vangyzen@FreeBSD.org) Message-Id: <201811282119.wASLJxuY033505@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: vangyzen set sender to vangyzen@FreeBSD.org using -f From: Eric van Gyzen Date: Wed, 28 Nov 2018 21:19:59 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r341165 - in stable/11/sys: amd64/ia32 mips/mips powerpc/powerpc X-SVN-Group: stable-11 X-SVN-Commit-Author: vangyzen X-SVN-Commit-Paths: in stable/11/sys: amd64/ia32 mips/mips powerpc/powerpc X-SVN-Commit-Revision: 341165 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: E9D1B8970B X-Spamd-Result: default: False [0.98 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_SPAM_SHORT(0.24)[0.236,0]; NEURAL_SPAM_MEDIUM(0.25)[0.254,0]; NEURAL_SPAM_LONG(0.49)[0.488,0] X-Rspamd-Server: mx1.freebsd.org X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.29 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: Wed, 28 Nov 2018 21:20:00 -0000 Author: vangyzen Date: Wed Nov 28 21:19:58 2018 New Revision: 341165 URL: https://svnweb.freebsd.org/changeset/base/341165 Log: MFC r340994 Prevent kernel stack disclosure in getcontext/swapcontext Expand r338982 to cover freebsd32 interfaces on amd64, mips, and powerpc. Security: FreeBSD-EN-18:12.mem Security: CVE-2018-17155 Sponsored by: Dell EMC Isilon Modified: stable/11/sys/amd64/ia32/ia32_signal.c stable/11/sys/mips/mips/freebsd32_machdep.c stable/11/sys/powerpc/powerpc/exec_machdep.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/amd64/ia32/ia32_signal.c ============================================================================== --- stable/11/sys/amd64/ia32/ia32_signal.c Wed Nov 28 20:03:53 2018 (r341164) +++ stable/11/sys/amd64/ia32/ia32_signal.c Wed Nov 28 21:19:58 2018 (r341165) @@ -260,6 +260,7 @@ freebsd32_getcontext(struct thread *td, struct freebsd if (uap->ucp == NULL) ret = EINVAL; else { + bzero(&uc, sizeof(uc)); ia32_get_mcontext(td, &uc.uc_mcontext, GET_MC_CLEAR_RET); PROC_LOCK(td->td_proc); uc.uc_sigmask = td->td_sigmask; @@ -300,6 +301,7 @@ freebsd32_swapcontext(struct thread *td, struct freebs if (uap->oucp == NULL || uap->ucp == NULL) ret = EINVAL; else { + bzero(&uc, sizeof(uc)); ia32_get_mcontext(td, &uc.uc_mcontext, GET_MC_CLEAR_RET); PROC_LOCK(td->td_proc); uc.uc_sigmask = td->td_sigmask; Modified: stable/11/sys/mips/mips/freebsd32_machdep.c ============================================================================== --- stable/11/sys/mips/mips/freebsd32_machdep.c Wed Nov 28 20:03:53 2018 (r341164) +++ stable/11/sys/mips/mips/freebsd32_machdep.c Wed Nov 28 21:19:58 2018 (r341165) @@ -290,6 +290,7 @@ freebsd32_getcontext(struct thread *td, struct freebsd if (uap->ucp == NULL) ret = EINVAL; else { + bzero(&uc, sizeof(uc)); get_mcontext32(td, &uc.uc_mcontext, GET_MC_CLEAR_RET); PROC_LOCK(td->td_proc); uc.uc_sigmask = td->td_sigmask; @@ -329,6 +330,7 @@ freebsd32_swapcontext(struct thread *td, struct freebs if (uap->oucp == NULL || uap->ucp == NULL) ret = EINVAL; else { + bzero(&uc, sizeof(uc)); get_mcontext32(td, &uc.uc_mcontext, GET_MC_CLEAR_RET); PROC_LOCK(td->td_proc); uc.uc_sigmask = td->td_sigmask; Modified: stable/11/sys/powerpc/powerpc/exec_machdep.c ============================================================================== --- stable/11/sys/powerpc/powerpc/exec_machdep.c Wed Nov 28 20:03:53 2018 (r341164) +++ stable/11/sys/powerpc/powerpc/exec_machdep.c Wed Nov 28 21:19:58 2018 (r341165) @@ -801,6 +801,7 @@ freebsd32_getcontext(struct thread *td, struct freebsd if (uap->ucp == NULL) ret = EINVAL; else { + bzero(&uc, sizeof(uc)); get_mcontext32(td, &uc.uc_mcontext, GET_MC_CLEAR_RET); PROC_LOCK(td->td_proc); uc.uc_sigmask = td->td_sigmask; @@ -840,6 +841,7 @@ freebsd32_swapcontext(struct thread *td, struct freebs if (uap->oucp == NULL || uap->ucp == NULL) ret = EINVAL; else { + bzero(&uc, sizeof(uc)); get_mcontext32(td, &uc.uc_mcontext, GET_MC_CLEAR_RET); PROC_LOCK(td->td_proc); uc.uc_sigmask = td->td_sigmask;