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[ Upstream commitd671fa6393] It is necessary to set fd to -1 when inotify_add_watch() fails in cg_prepare_for_wait. Otherwise the fd which has been closed in cg_prepare_for_wait may be misused in other functions such as cg_enter_and_wait_for_frozen and cg_freeze_wait. Fixes:5313bfe425("selftests: cgroup: add freezer controller self-tests") Signed-off-by: Hewenliang <hewenliang4@huawei.com> Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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.
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