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Date:   Tue, 23 Apr 2019 10:25:30 -0700
From:   Peter Oskolkov <>
To:     Greg Kroah-Hartman <>,,
Cc:     Peter Oskolkov <>, David Miller <>,
        Eric Dumazet <>,
        Sasha Levin <>,
        Captain Wiggum <>,
        Lars Persson <>, Peter Oskolkov <>
Subject: [PATCH 4.19 stable v2 0/3] net: ip6 defrag: backport fixes

Lars Persson <> reported that a label was unused in
the 4.14 version of this patchset, and the issue was present in
the 4.19 patchset as well, so I'm sending a v2 that fixes it.

The original 4.19 patchset queued for stable is OK, and
can be used as is, but this v2 is a bit better: it fixes the
unused label issue and handles overlapping fragments better.

Sorry for the mess/v2.


Currently, 4.19 and earlier stable kernels contain a security fix
that is not fully IPv6 standard compliant.

This patchset backports IPv6 defrag fixes from 5.1rc that restore

Original 5.1 patchet:

v2 changes: handle overlapping fragments the way it is done upstream

Peter Oskolkov (3):
  net: IP defrag: encapsulate rbtree defrag code into callable functions
  net: IP6 defrag: use rbtrees for IPv6 defrag
  net: IP6 defrag: use rbtrees in nf_conntrack_reasm.c

 include/net/inet_frag.h                 |  16 +-
 include/net/ipv6_frag.h                 |  11 +-
 net/ipv4/inet_fragment.c                | 293 +++++++++++++++++++++++
 net/ipv4/ip_fragment.c                  | 302 +++---------------------
 net/ipv6/netfilter/nf_conntrack_reasm.c | 260 ++++++--------------
 net/ipv6/reassembly.c                   | 240 ++++++-------------
 6 files changed, 488 insertions(+), 634 deletions(-)


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