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8292d7f6e8
Root in init user namespace can modify /proc/sys/net/ipv4/ip_forward without CAP_NET_ADMIN, this doesn't follow the principle of capabilities. For example, let's take a look at netdev_store(), root can't modify netdev attribute without CAP_NET_ADMIN. So let's keep the consistency of permission check logic. Reported-by: Zeal Robot <zealci@zte.com.cn> Signed-off-by: Yang Yang <yang.yang29@zte.com.cn> Signed-off-by: David S. Miller <davem@davemloft.net>
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.