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Filename Latest commit message Latest commit date
Daniel Axtens d02f51cbcf bpf: fix bpf_skb_adjust_net/bpf_skb_proto_xlat to deal with gso sctp skbs
SCTP GSO skbs have a gso_size of GSO_BY_FRAGS, so any sort of
unconditionally mangling of that will result in nonsense value
and would corrupt the skb later on.

Therefore, i) add two helpers skb_increase_gso_size() and
skb_decrease_gso_size() that would throw a one time warning and
bail out for such skbs and ii) refuse and return early with an
error in those BPF helpers that are affected. We do need to bail
out as early as possible from there before any changes on the
skb have been performed.

Fixes: 6578171a7f ("bpf: add bpf_skb_change_proto helper")
Co-authored-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Daniel Axtens <dja@axtens.net>
Cc: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-03-03 13:01:11 -08:00
arch Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf 2018-03-01 21:42:07 -05:00
block
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Documentation bpf: fix bpf_skb_adjust_net/bpf_skb_proto_xlat to deal with gso sctp skbs 2018-03-03 13:01:11 -08:00
drivers spectrum: Reference count VLAN entries 2018-02-28 12:32:36 -05:00
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include bpf: fix bpf_skb_adjust_net/bpf_skb_proto_xlat to deal with gso sctp skbs 2018-03-03 13:01:11 -08:00
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kernel Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf 2018-03-01 21:42:07 -05:00
lib Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf 2018-03-01 21:42:07 -05:00
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net bpf: fix bpf_skb_adjust_net/bpf_skb_proto_xlat to deal with gso sctp skbs 2018-03-03 13:01:11 -08:00
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Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

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.