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| author | Jonathan Brassow <jbrassow@redhat.com> | 2013-03-07 23:24:26 +0100 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2013-03-20 03:17:57 +0100 |
| commit | 90584fc93d461520a888f691144f0879283b3624 (patch) | |
| tree | b29d3af3e2af5ff3e3761525de851d88f102f9e5 /arch | |
| parent | MD RAID5: Avoid accessing gendisk or queue structs when not available (diff) | |
| download | linux-90584fc93d461520a888f691144f0879283b3624.tar.xz linux-90584fc93d461520a888f691144f0879283b3624.zip | |
MD: Prevent sysfs operations on uninitialized kobjects
MD: Prevent sysfs operations on uninitialized kobjects
Device-mapper does not use sysfs; but when device-mapper is leveraging
MD's RAID personalities, MD sometimes attempts to update sysfs. This
patch adds checks for 'mddev-kobj.sd' in sysfs_[un]link_rdev to ensure
it is about to operate on something valid. This patch also checks for
'mddev->kobj.sd' before calling 'sysfs_notify' in 'remove_and_add_spares'.
Although 'sysfs_notify' already makes this check, doing so in
'remove_and_add_spares' prevents an additional mutex operation.
Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'arch')
0 files changed, 0 insertions, 0 deletions