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During target port swap, the swap logic ignores the DROPPED flag in the nodes. As a node then moves into the UNUSED state, the reference count will be dropped. If a node is later reused and moved out of the UNUSED state, an access can result in a use-after-free assert. Fix by having the port swap logic propagate the DROPPED flag when switching nodes. This will avoid reference from being dropped. Link: https://lore.kernel.org/r/20210412013127.2387-8-jsmart2021@gmail.com Co-developed-by: Justin Tee <justin.tee@broadcom.com> Signed-off-by: Justin Tee <justin.tee@broadcom.com> Signed-off-by: James Smart <jsmart2021@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.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.