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Filename Latest commit message Latest commit date
Eyal Birger cbc01968ae netfilter: nat: fix ICMP header corruption on ICMP errors 
commit 61177e911dad660df86a4553eb01c95ece2f6a82 upstream.

Commit 8303b7e8f0 ("netfilter: nat: fix spurious connection timeouts")
made nf_nat_icmp_reply_translation() use icmp_manip_pkt() as the l4
manipulation function for the outer packet on ICMP errors.

However, icmp_manip_pkt() assumes the packet has an 'id' field which
is not correct for all types of ICMP messages.

This is not correct for ICMP error packets, and leads to bogus bytes
being written the ICMP header, which can be wrongfully regarded as
'length' bytes by RFC 4884 compliant receivers.

Fix by assigning the 'id' field only for ICMP messages that have this
semantic.

Reported-by: Shmulik Ladkani <shmulik.ladkani@gmail.com>
Fixes: 8303b7e8f0 ("netfilter: nat: fix spurious connection timeouts")
Signed-off-by: Eyal Birger <eyal.birger@gmail.com>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-23 08:22:48 +01:00
arch ARM: dts: imx7: Fix Toradex Colibri iMX7S 256MB NAND flash support 2020-01-23 08:22:43 +01:00
block block: Fix the type of 'sts' in bsg_queue_rq() 2020-01-23 08:22:44 +01:00
certs
crypto
Documentation
drivers i2c: iop3xx: Fix memory leak in probe error path 2020-01-23 08:22:47 +01:00
fs Btrfs: always copy scrub arguments back to user space 2020-01-23 08:22:41 +01:00
include bpf: Sockmap/tls, push write_space updates through ulp updates 2020-01-23 08:22:45 +01:00
init
ipc
kernel bpf: Fix incorrect verifier simulation of ARSH under ALU32 2020-01-23 08:22:44 +01:00
lib
LICENSES
mm mm/page-writeback.c: avoid potential division by zero in wb_min_max_ratio() 2020-01-23 08:22:41 +01:00
net netfilter: nat: fix ICMP header corruption on ICMP errors 2020-01-23 08:22:48 +01:00
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README

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.