The patch titled
md: require CAP_SYS_ADMIN for (re-)configuring md devices via sysfs
has been added to the -mm tree. Its filename is
md-require-cap_sys_admin-for-re-configuring-md-devices-via-sysfs.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: md: require CAP_SYS_ADMIN for (re-)configuring md devices via sysfs
From: NeilBrown <neilb@xxxxxxx>
The ioctl requires CAP_SYS_ADMIN, so sysfs should too. Note that we don't
require CAP_SYS_ADMIN for reading attributes even though the ioctl does.
There is no reason to limit the read access, and much of the information is
already available via /proc/mdstat
Cc: Chris Wright <chrisw@xxxxxxxxxxxx>
Signed-off-by: Neil Brown <neilb@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/md/md.c | 4 ++++
1 file changed, 4 insertions(+)
diff -puN drivers/md/md.c~md-require-cap_sys_admin-for-re-configuring-md-devices-via-sysfs drivers/md/md.c
--- a/drivers/md/md.c~md-require-cap_sys_admin-for-re-configuring-md-devices-via-sysfs
+++ a/drivers/md/md.c
@@ -1928,6 +1928,8 @@ rdev_attr_store(struct kobject *kobj, st
if (!entry->store)
return -EIO;
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
return entry->store(rdev, page, length);
}
@@ -2861,6 +2863,8 @@ md_attr_store(struct kobject *kobj, stru
if (!entry->store)
return -EIO;
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
rv = mddev_lock(mddev);
if (!rv) {
rv = entry->store(mddev, page, length);
_
Patches currently in -mm which might be from neilb@xxxxxxx are
origin.patch
generic_file_buffered_write-deadlock-on-vectored-write.patch
md-possible-fix-for-unplug-problem.patch
md-set-desc_nr-correctly-for-version-1-superblocks.patch
md-delay-starting-md-threads-until-array-is-completely-setup.patch
md-fix-resync-speed-calculation-for-restarted-resyncs.patch
md-fix-a-plug-unplug-race-in-raid5.patch
md-fix-some-small-races-in-bitmap-plugging-in-raid5.patch
md-fix-usage-of-wrong-variable-in-raid1.patch
md-unify-usage-of-symbolic-names-for-perms.patch
md-require-cap_sys_admin-for-re-configuring-md-devices-via-sysfs.patch
md-fix-will-configure-message-when-interpreting-md=-kernel-parameter.patch
md-include-sector-number-in-messages-about-corrected-read-errors.patch
md-dm-reduce-stack-usage-with-stacked-block-devices.patch
lockdep-annotate-sunrpc-code.patch
-
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