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a5789b07b3
When an inode is tagged with a tree, tag_chunk() checks whether there is audit_tree_group mark attached to the inode and adds one if not. However nothing protects another tag_chunk() to add the mark between we've checked and try to add the fsnotify mark thus resulting in an error from fsnotify_add_mark() and consequently an ENOSPC error from tag_chunk(). Fix the problem by holding mark_mutex over the whole check-insert code sequence. Reviewed-by: Richard Guy Briggs <rgb@redhat.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Paul Moore <paul@paul-moore.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.