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In the function hsr_proxy_annouance() added in the previous commit5f703ce5c9("net: hsr: Send supervisory frames to HSR network with ProxyNodeTable data"), the return value of the hsr_port_get_hsr() function is not checked to be a NULL pointer, which causes a NULL pointer dereference. To solve this, we need to add code to check whether the return value of hsr_port_get_hsr() is NULL. Reported-by: syzbot+02a42d9b1bd395cbcab4@syzkaller.appspotmail.com Fixes:5f703ce5c9("net: hsr: Send supervisory frames to HSR network with ProxyNodeTable data") Signed-off-by: Jeongjun Park <aha310510@gmail.com> Reviewed-by: Simon Horman <horms@kernel.org> Acked-by: Lukasz Majewski <lukma@denx.de> Link: https://patch.msgid.link/20240907190341.162289-1-aha310510@gmail.com Signed-off-by: Jakub Kicinski <kuba@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 reStructuredText 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.