From owner-svn-src-head@freebsd.org Thu Aug 27 17:36:07 2020 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 678553B9CFE; Thu, 27 Aug 2020 17:36:07 +0000 (UTC) (envelope-from markj@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) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 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 4Bcqdg25rDz4138; Thu, 27 Aug 2020 17:36:07 +0000 (UTC) (envelope-from markj@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 2B4A927B85; Thu, 27 Aug 2020 17:36:07 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 07RHa6kA071950; Thu, 27 Aug 2020 17:36:06 GMT (envelope-from markj@FreeBSD.org) Received: (from markj@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 07RHa6iP071949; Thu, 27 Aug 2020 17:36:06 GMT (envelope-from markj@FreeBSD.org) Message-Id: <202008271736.07RHa6iP071949@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: markj set sender to markj@FreeBSD.org using -f From: Mark Johnston Date: Thu, 27 Aug 2020 17:36:06 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r364876 - head/sys/kern X-SVN-Group: head X-SVN-Commit-Author: markj X-SVN-Commit-Paths: head/sys/kern X-SVN-Commit-Revision: 364876 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: 2.1.33 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: Thu, 27 Aug 2020 17:36:07 -0000 Author: markj Date: Thu Aug 27 17:36:06 2020 New Revision: 364876 URL: https://svnweb.freebsd.org/changeset/base/364876 Log: Fix writing of the final block of encrypted, compressed kernel dumps. Previously any residual data in the final block of a compressed kernel dump would be written unencrypted. Note, such a configuration already does not work properly when using AES-CBC since the compressed data is typically not a multiple of the AES block length in size and EKCD does not implement any padding scheme. However, EKCD more recently gained support for using the ChaCha20 cipher, which being a stream cipher does not have this problem. Submitted by: sigsys@gmail.com Reviewed by: cem MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D26188 Modified: head/sys/kern/kern_shutdown.c Modified: head/sys/kern/kern_shutdown.c ============================================================================== --- head/sys/kern/kern_shutdown.c Thu Aug 27 17:30:57 2020 (r364875) +++ head/sys/kern/kern_shutdown.c Thu Aug 27 17:36:06 2020 (r364876) @@ -1464,6 +1464,7 @@ kerneldumpcomp_write_cb(void *base, size_t length, off } resid = length - rlength; memmove(di->blockbuf, (uint8_t *)base + rlength, resid); + bzero((uint8_t *)di->blockbuf + resid, di->blocksize - resid); di->kdcomp->kdc_resid = resid; return (EAGAIN); } @@ -1680,9 +1681,10 @@ dump_finish(struct dumperinfo *di, struct kerneldumphe error = compressor_flush(di->kdcomp->kdc_stream); if (error == EAGAIN) { /* We have residual data in di->blockbuf. */ - error = dump_write(di, di->blockbuf, 0, di->dumpoff, - di->blocksize); - di->dumpoff += di->kdcomp->kdc_resid; + error = _dump_append(di, di->blockbuf, 0, di->blocksize); + if (error == 0) + /* Compensate for _dump_append()'s adjustment. */ + di->dumpoff -= di->blocksize - di->kdcomp->kdc_resid; di->kdcomp->kdc_resid = 0; } if (error != 0)