linux-kernel - [PATCH 0/5] Extends block2mtd and ubi drivers

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Fri,  2 Jun 2017 17:43:37 +0200
From:   Pali Rohár <pali.rohar@...il.com>
To:     Joern Engel <joern@...ybastard.org>,
        David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Marek Vasut <marek.vasut@...il.com>,
        Richard Weinberger <richard@....at>,
        Cyrille Pitchen <cyrille.pitchen@...el.com>,
        Artem Bityutskiy <dedekind1@...il.com>
Cc:     linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Pali Rohár <pali.rohar@...il.com>
Subject: [PATCH 0/5] Extends block2mtd and ubi drivers

This patch series extends block2mtd and ubi drivers to better handle
read-only devices and allow to load UBI image from local file which was
created for nand device.

Tested for Nokia N900 with Maemo 5 rootfs ubifs image
(rootfs_RX-51_2009SE_21.2011.38-1_PR_MR0) which has erase size 128k,
write size 2k and nand subpage shift 2.

$ losetup -r /dev/loop0 rootfs_RX-51_2009SE_21.2011.38-1_PR_MR0.ubifs
$ echo -n /dev/loop0,131072,2048,2 > /sys/module/block2mtd/parameters/block2mtd
$ ubiattach -p /dev/mtd0
$ mount /dev/ubi0_0 /mnt/ubi -t ubifs
...
$ umount /dev/ubi0_0
$ ubidetach -p /dev/mtd0
$ echo -n del=/dev/loop0 > /sys/module/block2mtd/parameters/block2mtd
$ losetup -d /dev/loop0

Pali Rohár (5):
  mtd: block2mtd: Check for valid user supplied erase size
  mtd: block2mtd: Add support for specifying MTD write size and subpage
    shift
  mtd: block2mtd: Fallback to read-only mode
  mtd: block2mtd: Add support for deleting block2mtd mapping
  ubi: Allow to use read-only UBI volume with not enough PEBs

 drivers/mtd/devices/block2mtd.c |  129 ++++++++++++++++++++++++++++++---------
 drivers/mtd/ubi/vtbl.c          |   14 +++--
 2 files changed, 110 insertions(+), 33 deletions(-)

-- 
1.7.9.5