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Filename Latest commit message Latest commit date
Florian Westphal 21858a75dc netfilter: nat: fix ipv6 nat redirect with mapped and scoped addresses
[ Upstream commit 80abbe8a8263106fe45a4f293b92b5c74cc9cc8a ]

The ipv6 redirect target was derived from the ipv4 one, i.e. its
identical to a 'dnat' with the first (primary) address assigned to the
network interface.  The code has been moved around to make it usable
from nf_tables too, but its still the same as it was back when this
was added in 2012.

IPv6, however, has different types of addresses, if the 'wrong' address
comes first the redirection does not work.

In Daniels case, the addresses are:
  inet6 ::ffff:192 ...
  inet6 2a01: ...

... so the function attempts to redirect to the mapped address.

Add more checks before the address is deemed correct:
1. If the packets' daddr is scoped, search for a scoped address too
2. skip tentative addresses
3. skip mapped addresses

Use the first address that appears to match our needs.

Reported-by: Daniel Huhardeaux <tech@tootai.net>
Closes: https://lore.kernel.org/netfilter/71be06b8-6aa0-4cf9-9e0b-e2839b01b22f@tootai.net/
Fixes: 115e23ac78 ("netfilter: ip6tables: add REDIRECT target")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-11-20 10:30:16 +01:00
arch powerpc/pseries: fix potential memory leak in init_cpu_associativity() 2023-11-20 10:30:14 +01:00
block block/partition: fix signedness issue for Amiga partitions 2023-07-27 08:37:29 +02:00
certs
crypto X.509: if signature is unsupported skip validation 2023-09-23 10:59:55 +02:00
Documentation firmware: ti_sci: Replace HTTP links with HTTPS ones 2023-11-20 10:30:12 +01:00
drivers r8169: respect userspace disabling IFF_MULTICAST 2023-11-20 10:30:16 +01:00
fs f2fs: fix to initialize map.m_pblk in f2fs_precache_extents() 2023-11-20 10:30:14 +01:00
include netfilter: nft_redir: use struct nf_nat_range2 throughout and deduplicate eval call-backs 2023-11-20 10:30:16 +01:00
init x86/mm: Initialize text poking earlier 2023-08-08 19:56:36 +02:00
ipc
kernel genirq/matrix: Exclude managed interrupts in irq_matrix_allocated() 2023-11-20 10:30:08 +01:00
lib kobject: Fix slab-out-of-bounds in fill_kobj_path() 2023-11-08 11:23:38 +01:00
LICENSES
mm vfs: fix readahead(2) on block devices 2023-11-20 10:30:08 +01:00
net netfilter: nat: fix ipv6 nat redirect with mapped and scoped addresses 2023-11-20 10:30:16 +01:00
samples samples/bpf: Fix buffer overflow in tcp_basertt 2023-07-27 08:37:07 +02:00
scripts modpost: fix tee MODULE_DEVICE_TABLE built on big-endian host 2023-11-20 10:30:14 +01:00
security ima: rework CONFIG_IMA dependency block 2023-10-10 21:46:46 +02:00
sound ASoC: ams-delta.c: use component after check 2023-11-20 10:30:13 +01:00
tools tools: iio: iio_generic_buffer ensure alignment 2023-11-20 10:30:14 +01:00
usr
virt KVM: Destroy target device if coalesced MMIO unregistration fails 2023-03-11 16:44:01 +01:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS iio: stx104: Move to addac subdirectory 2023-08-30 16:27:12 +02:00
Makefile Linux 5.4.260 2023-11-08 11:23:43 +01:00
README

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.