From: Chris Ball <cjb@laptop.org>
To: Andrei Warkentin <andreiw@motorola.com>
Cc: Arnd Bergmann <arnd@arndb.de>, linux-mmc@vger.kernel.org
Subject: Re: [PATCHv4] MMC: MMC boot partitions support.
Date: Thu, 31 Mar 2011 16:03:57 -0400 [thread overview]
Message-ID: <m3bp0rukeq.fsf@pullcord.laptop.org> (raw)
In-Reply-To: <m3fwq3ulnj.fsf@pullcord.laptop.org> (Chris Ball's message of "Thu, 31 Mar 2011 15:37:04 -0400")
Hi,
On Thu, Mar 31 2011, Chris Ball wrote:
> But I'm still concerned after your Kconfig options are added, because
> I'm just not reassured by Kconfig options in principle, because of the
> case where *the person who built the kernel* is not the same as the
> *user who is running commands*. Imagine that CyanogenMod (or even
> Qualcomm!) distributes a kernel with this Kconfig option turned on --
> because they don't realize how dangerous it is, perhaps, or because they
> had a use for it during development -- to see where I'm coming from.
Another strawman, after brainstorming a bit on IRC -- how about
the block device itself comes up read-only, until you use a module
parameter/sysfs entry to make it read-write. As a strawman:
echo 1 > /sys/module/mmc_block/boot_partitions_are_writeable
(That way people who write to it regularly can throw the module parameter
in their boot environment, and the rooting enthusiasts who didn't compile
the kernel are safe until they learn enough to be really dangerous..)
- Chris.
--
Chris Ball <cjb@laptop.org> <http://printf.net/>
One Laptop Per Child
next prev parent reply other threads:[~2011-03-31 19:58 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-19 11:18 MMC/eMMC partitioning support Andrei Warkentin
2011-03-19 11:18 ` [RFC] MMC: MMC boot partitions support Andrei Warkentin
2011-03-19 12:13 ` Andrei Warkentin
2011-03-21 14:19 ` [PATCH] " Andrei Warkentin
2011-03-22 3:54 ` [PATCHv3] " Andrei Warkentin
2011-03-22 21:11 ` MMC partitions support (4th revision) Andrei Warkentin
2011-03-22 21:11 ` [PATCHv4] MMC: MMC boot partitions support Andrei Warkentin
2011-03-29 22:45 ` Andrei Warkentin
2011-03-30 12:03 ` Arnd Bergmann
2011-03-30 20:07 ` Andrei Warkentin
2011-03-30 22:43 ` Chris Ball
2011-03-30 22:46 ` Chris Ball
2011-03-30 23:18 ` Andrei Warkentin
2011-03-30 23:34 ` Chris Ball
2011-03-31 6:57 ` Andrei Warkentin
2011-03-31 11:01 ` Arnd Bergmann
2011-03-31 19:17 ` Andrei Warkentin
2011-03-31 19:37 ` Chris Ball
2011-03-31 20:01 ` Andrei Warkentin
2011-03-31 20:03 ` Chris Ball [this message]
2011-03-31 20:01 ` Andrei Warkentin
2011-04-01 9:23 ` Arnd Bergmann
2011-04-01 14:52 ` Chris Ball
2011-04-01 9:21 ` Arnd Bergmann
2011-03-31 11:17 ` Arnd Bergmann
2011-03-31 19:29 ` Andrei Warkentin
2011-04-01 10:38 ` Arnd Bergmann
2011-04-01 18:42 ` Andrei Warkentin
2011-04-01 19:25 ` Arnd Bergmann
2011-04-01 19:42 ` Andrei Warkentin
2011-04-04 12:22 ` [PATCH] " Andrei Warkentin
2011-04-04 11:52 ` Andrei Warkentin
2011-04-11 21:13 ` [patchv3 1/4] MMC: Rename erase_timeout to cmd_timeout_ms Andrei Warkentin
2011-04-11 21:13 ` [patchv3 2/4] MMC: SDHCI R1B command handling + MMC_CAP_ERASE Andrei Warkentin
2011-04-12 9:06 ` Dong, Chuanxiao
2011-04-12 18:05 ` Andrei Warkentin
2011-04-13 1:59 ` Dong, Chuanxiao
2011-04-13 5:44 ` Andrei Warkentin
2011-04-15 21:34 ` Cyril Hrubis
2011-08-10 13:30 ` Chris Ball
2011-04-11 21:13 ` [patchv3 3/4] MMC: Allow setting CMD timeout for CMD6 (SWITCH) Andrei Warkentin
2011-04-11 21:13 ` [patchv3 4/4] MMC: MMC boot partitions support Andrei Warkentin
2011-04-11 22:00 ` Chris Ball
2011-04-11 22:10 ` Andrei Warkentin
2011-04-11 22:22 ` Chris Ball
2011-04-11 22:18 ` Andrei Warkentin
2011-04-11 23:10 ` [patchv4 1/2] MMC: block.c cleanup for host claim/release Andrei Warkentin
2011-04-11 23:10 ` [patchv4 2/2] MMC: MMC boot partitions support Andrei Warkentin
2011-04-11 23:20 ` [patchv3 4/4] " Chris Ball
2011-04-11 23:24 ` Andrei Warkentin
2011-04-21 1:13 ` Chris Ball
2011-04-21 1:30 ` Chris Ball
2011-04-21 5:09 ` Philip Rakity
2011-04-21 5:22 ` Chris Ball
2011-04-21 5:31 ` Andrei Warkentin
2011-04-21 6:07 ` [RFC] MMC: Block: Ensure hardware partitions don't mess with mmcblk device naming Andrei Warkentin
2011-04-21 8:17 ` Andrei Warkentin
2011-04-21 14:44 ` Chris Ball
2011-04-22 0:20 ` Chris Ball
2011-04-22 3:46 ` [PATCH] " Andrei Warkentin
2011-04-22 3:50 ` Andrei Warkentin
2011-04-22 22:34 ` Chris Ball
2011-04-21 4:31 ` [patchv3 4/4] MMC: MMC boot partitions support Jaehoon Chung
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