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swh:1:snp:32555a3fd8878f019c2ebd6c964bc1edcaeff337
Revision 606686eeac4550d2212bf3d621a810407ef5e9bf authored by Josef Bacik on 04 June 2012, 18:03:51 UTC, committed by Chris Mason on 15 June 2012, 01:29:16 UTC 
Btrfs: use rcu to protect device->name
 
Al pointed out that we can just toss out the old name on a device and add a
new one arbitrarily, so anybody who uses device->name in printk could
possibly use free'd memory.  Instead of adding locking around all of this he
suggested doing it with RCU, so I've introduced a struct rcu_string that
does just that and have gone through and protected all accesses to
device->name that aren't under the uuid_mutex with rcu_read_lock().  This
protects us and I will use it for dealing with removing the device that we
used to mount the file system in a later patch.  Thanks,

Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <josef@redhat.com>
1 parent 17ca04a
History
Tip revision: ffb4d94b4314655cea60ab7962756e6bab72fc7e authored by Linus Torvalds on 30 September 2022, 23:25:52 UTC
Merge tag 'drm-fixes-2022-10-01' of git://anongit.freedesktop.org/drm/drm
Tip revision: ffb4d94
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