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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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Jianbo LiuandGreg Kroah-Hartman
55787a73fb
[ Upstream commit3d5221af9c] Commit61fafbee6c("xfrm: Determine inner GSO type from packet inner protocol") attempted to fix GSO segmentation by reading the inner protocol from XFRM_MODE_SKB_CB(skb)->protocol. This was incorrect because the field holds the inner L4 protocol (TCP/UDP) instead of the required tunnel protocol. Also, the memory location (shared by XFRM_SKB_CB(skb) which could be overwritten by xfrm_replay_overflow()) is prone to corruption. This combination caused the kernel to select the wrong inner mode and get the wrong address family. The correct value is in xfrm_offload(skb)->proto, which is set from the outer tunnel header's protocol field by esp[4|6]_gso_encap(). It is initialized by xfrm[4|6]_tunnel_encap_add() to either IPPROTO_IPIP or IPPROTO_IPV6, using xfrm_af2proto() and correctly reflects the inner packet's address family. Fixes:61fafbee6c("xfrm: Determine inner GSO type from packet inner protocol") Signed-off-by: Jianbo Liu <jianbol@nvidia.com> Reviewed-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Sasha Levin <sashal@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 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.