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[ Upstream commitef489749aa] skb->cb may contain data from previous layers (in an observed case IPv4 with L3 Master Device). In the observed scenario, the data in IPCB(skb)->frags was misinterpreted as IP6CB(skb)->frag_max_size, eventually caused an unexpected IPv6 fragmentation in ip6_fragment() through ip6_finish_output(). This patch clears IP6CB(skb), which potentially contains garbage data, on the SRH ip4ip6 encapsulation. Fixes:32d99d0b67("ipv6: sr: add support for ip4ip6 encapsulation") Signed-off-by: Yohei Kanemaru <yohei.kanemaru@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.