Re: [PATCH] race condition fixing in sysfs_create_dir

[Tejun Heo]

On Fri, Jul 26, 2013 at 09:38:56AM -0400, Tejun Heo wrote:
> I don't think sysfs is supposed to handle multiple actors trying to
> populate and destroy the directory at the same time at all, so this

e.g. kobj->sd assignment in sysfs_create_dir() isn't synchronized and
doesn't have memory barrier either.  Nothing prevents subdirectory
creation from accessing half-initialized sysfs_dirent on architectures
which require read dependency barriers.  The caller is responsible for
synchronizing these operations.

Thanks.

-- 
tejun
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