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__nf_ct_try_assign_helper() remains in place but it now requires a template to configure the helper. A toggle to disable automatic helper assignment was added by:a900689264("netfilter: nf_ct_helper: allow to disable automatic helper assignment") in 2012 to address the issues described in "Secure use of iptables and connection tracking helpers". Automatic conntrack helper assignment was disabled by:3bb398d925("netfilter: nf_ct_helper: disable automatic helper assignment") back in 2016. This patch removes the sysctl and modparam toggles, users now have to rely on explicit conntrack helper configuration via ruleset. Update tools/testing/selftests/netfilter/nft_conntrack_helper.sh to check that auto-assignment does not happen anymore. Acked-by: Aaron Conole <aconole@redhat.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.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.