From owner-svn-src-all@freebsd.org Wed Apr 3 08:22:59 2019 Return-Path: Delivered-To: svn-src-all@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 7C9561563B66; Wed, 3 Apr 2019 08:22:59 +0000 (UTC) (envelope-from mw@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 20E0A6B751; Wed, 3 Apr 2019 08:22:59 +0000 (UTC) (envelope-from mw@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 F0A71B2E6; Wed, 3 Apr 2019 08:22:58 +0000 (UTC) (envelope-from mw@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x338MwAv081431; Wed, 3 Apr 2019 08:22:58 GMT (envelope-from mw@FreeBSD.org) Received: (from mw@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x338Mwqe081430; Wed, 3 Apr 2019 08:22:58 GMT (envelope-from mw@FreeBSD.org) Message-Id: <201904030822.x338Mwqe081430@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: mw set sender to mw@FreeBSD.org using -f From: Marcin Wojtas Date: Wed, 3 Apr 2019 08:22:58 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r345842 - head/sys/dev/tpm X-SVN-Group: head X-SVN-Commit-Author: mw X-SVN-Commit-Paths: head/sys/dev/tpm X-SVN-Commit-Revision: 345842 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 20E0A6B751 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.99 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; NEURAL_HAM_SHORT(-0.99)[-0.987,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US]; NEURAL_HAM_LONG(-1.00)[-1.000,0] 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: Wed, 03 Apr 2019 08:22:59 -0000 Author: mw Date: Wed Apr 3 08:22:58 2019 New Revision: 345842 URL: https://svnweb.freebsd.org/changeset/base/345842 Log: Add a cv_wait to the TPM2.0 harvesting function Harvesting has to compete for the TPM chip with userspace. Before this change the callout could hijack an unread buffer causing a userspace call to the TPM to fail. Submitted by: Kornel Duleba Reviewed by: delphij Obtained from: Semihalf Sponsored by: Stormshield Differential Revision: https://reviews.freebsd.org/D19712 Modified: head/sys/dev/tpm/tpm20.c Modified: head/sys/dev/tpm/tpm20.c ============================================================================== --- head/sys/dev/tpm/tpm20.c Wed Apr 3 08:18:18 2019 (r345841) +++ head/sys/dev/tpm/tpm20.c Wed Apr 3 08:22:58 2019 (r345842) @@ -263,6 +263,8 @@ tpm20_harvest(void *arg) sc = arg; sx_xlock(&sc->dev_lock); + while (sc->pending_data_length != 0) + cv_wait(&sc->buf_cv, &sc->dev_lock); memcpy(sc->buf, cmd, sizeof(cmd)); result = sc->transmit(sc, sizeof(cmd));