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If opinfo->conn is another connection and while ksmbd send oplock break request to cient on current connection, The connection for opinfo->conn can be disconnect and conn could be freed. When sending oplock break request, this ksmbd_conn can be used and cause user-after-free issue. When getting opinfo from the list, ksmbd check connection is being released. If it is not released, Increase ->r_count to wait that connection is freed. Cc: stable@vger.kernel.org Reported-by: Per Forlin <per.forlin@axis.com> Tested-by: Per Forlin <per.forlin@axis.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.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.