From owner-svn-src-head@freebsd.org Fri Dec 29 19:07:52 2017 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 2246AEAB851; Fri, 29 Dec 2017 19:07:52 +0000 (UTC) (envelope-from marius@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 mx1.freebsd.org (Postfix) with ESMTPS id E0DE677861; Fri, 29 Dec 2017 19:07:51 +0000 (UTC) (envelope-from marius@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id vBTJ7otK072992; Fri, 29 Dec 2017 19:07:50 GMT (envelope-from marius@FreeBSD.org) Received: (from marius@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id vBTJ7oe5072991; Fri, 29 Dec 2017 19:07:50 GMT (envelope-from marius@FreeBSD.org) Message-Id: <201712291907.vBTJ7oe5072991@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: marius set sender to marius@FreeBSD.org using -f From: Marius Strobl Date: Fri, 29 Dec 2017 19:07:50 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r327355 - head/sys/dev/mmc X-SVN-Group: head X-SVN-Commit-Author: marius X-SVN-Commit-Paths: head/sys/dev/mmc X-SVN-Commit-Revision: 327355 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: 2.1.25 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, 29 Dec 2017 19:07:52 -0000 Author: marius Date: Fri Dec 29 19:07:50 2017 New Revision: 327355 URL: https://svnweb.freebsd.org/changeset/base/327355 Log: - Don't allow userland to switch partitions; it's next to impossible to recover from that, especially when something goes wrong. - When userland changes EXT_CSD, update the kernel copy before using relevant EXT_CSD bits in mmcsd_switch_part(). Modified: head/sys/dev/mmc/mmcsd.c Modified: head/sys/dev/mmc/mmcsd.c ============================================================================== --- head/sys/dev/mmc/mmcsd.c Fri Dec 29 19:05:07 2017 (r327354) +++ head/sys/dev/mmc/mmcsd.c Fri Dec 29 19:07:50 2017 (r327355) @@ -914,6 +914,16 @@ mmcsd_ioctl_cmd(struct mmcsd_part *part, struct mmc_io default: break; } + /* + * No partition switching in userland; it's almost impossible + * to recover from that, especially if things go wrong. + */ + if (cmd.opcode == MMC_SWITCH_FUNC && dp != NULL && + (((uint8_t *)dp)[EXT_CSD_PART_CONFIG] & + EXT_CSD_PART_CONFIG_ACC_MASK) != sc->part_curr) { + err = EINVAL; + goto out; + } } dev = sc->dev; mmcbus = sc->mmcbus; @@ -934,7 +944,7 @@ mmcsd_ioctl_cmd(struct mmcsd_part *part, struct mmc_io if (part->type == EXT_CSD_PART_CONFIG_ACC_RPMB) { /* * If the request went to the RPMB partition, try to ensure - * that the command actually has completed ... + * that the command actually has completed. */ retries = MMCSD_CMD_RETRIES; do { @@ -946,13 +956,6 @@ mmcsd_ioctl_cmd(struct mmcsd_part *part, struct mmc_io break; DELAY(1000); } while (retries-- > 0); - -switch_back: - /* ... and always switch back to the default partition. */ - err = mmcsd_switch_part(mmcbus, dev, rca, - EXT_CSD_PART_CONFIG_ACC_DEFAULT); - if (err != MMC_ERR_NONE) - goto release; } /* * If EXT_CSD was changed, our copy is outdated now. Specifically, @@ -961,6 +964,17 @@ switch_back: */ if (cmd.opcode == MMC_SWITCH_FUNC) { err = mmc_send_ext_csd(mmcbus, dev, sc->ext_csd); + if (err != MMC_ERR_NONE) + goto release; + } +switch_back: + if (part->type == EXT_CSD_PART_CONFIG_ACC_RPMB) { + /* + * If the request went to the RPMB partition, always switch + * back to the default partition (see mmcsd_switch_part()). + */ + err = mmcsd_switch_part(mmcbus, dev, rca, + EXT_CSD_PART_CONFIG_ACC_DEFAULT); if (err != MMC_ERR_NONE) goto release; }