Tejun Heo 29b311867d kernfs: protect lazy kernfs_iattrs allocation with mutex ... commit 4afddd60a7 upstream. kernfs_iattrs is allocated lazily when operations which require it take place; unfortunately, the lazy allocation and returning weren't properly synchronized and when there are multiple concurrent operations, it might end up returning kernfs_iattrs which hasn't finished initialization yet or different copies to different callers. Fix it by synchronizing with a mutex. This can be smarter with memory barriers but let's go there if it actually turns out to be necessary. Signed-off-by: Tejun Heo <tj@kernel.org> Link: http://lkml.kernel.org/g/533ABA32.9080602@oracle.com Reported-by: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2014-04-26 17:19:04 -07:00
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Makefile	sysfs, kernfs: add skeletons for kernfs	2013-11-27 13:28:24 -08:00
dir.c	kernfs: fix off by one error.	2014-04-26 17:19:03 -07:00
file.c	kernfs: associate a new kernfs_node with its parent on creation	2014-01-17 11:50:07 -08:00
inode.c	kernfs: protect lazy kernfs_iattrs allocation with mutex	2014-04-26 17:19:04 -07:00
kernfs-internal.h	kernfs: associate a new kernfs_node with its parent on creation	2014-01-17 11:50:07 -08:00
mount.c	sysfs: fix namespace refcnt leak	2014-02-25 07:37:52 -08:00
symlink.c	kernfs: associate a new kernfs_node with its parent on creation	2014-01-17 11:50:07 -08:00