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Ridge Kennedy 0d0d9a388a l2tp: Allow duplicate session creation with UDP
In the past it was possible to create multiple L2TPv3 sessions with the
same session id as long as the sessions belonged to different tunnels.
The resulting sessions had issues when used with IP encapsulated tunnels,
but worked fine with UDP encapsulated ones. Some applications began to
rely on this behaviour to avoid having to negotiate unique session ids.

Some time ago a change was made to require session ids to be unique across
all tunnels, breaking the applications making use of this "feature".

This change relaxes the duplicate session id check to allow duplicates
if both of the colliding sessions belong to UDP encapsulated tunnels.

Fixes: dbdbc73b44 ("l2tp: fix duplicate session creation")
Signed-off-by: Ridge Kennedy <ridge.kennedy@alliedtelesis.co.nz>
Acked-by: James Chapman <jchapman@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-04 12:35:49 +01:00
arch drm pull for 5.6-rc1 2020-01-30 08:04:01 -08:00
block SCSI misc on 20200129 2020-01-29 18:16:16 -08:00
certs certs: Add wrapper function to check blacklisted binary hash 2019-11-12 12:25:50 +11:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2020-01-28 15:38:56 -08:00
Documentation Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf 2020-02-01 12:38:20 -08:00
drivers r8152: Add MAC passthrough support to new device 2020-02-04 11:58:10 +01:00
fs threads-v5.6 2020-01-29 19:38:34 -08:00
include drm pull for 5.6-rc1 2020-01-30 08:04:01 -08:00
init Driver core changes for 5.6-rc1 2020-01-29 10:18:20 -08:00
ipc treewide: Use sizeof_field() macro 2019-12-09 10:36:44 -08:00
kernel hmm related patches for 5.6 2020-01-29 19:56:50 -08:00
lib linux-kselftest-5.6-rc1-kunit 2020-01-29 15:25:34 -08:00
LICENSES LICENSES: Rename other to deprecated 2019-05-03 06:34:32 -06:00
mm hmm related patches for 5.6 2020-01-29 19:56:50 -08:00
net l2tp: Allow duplicate session creation with UDP 2020-02-04 12:35:49 +01:00
samples drm pull for 5.6-rc1 2020-01-30 08:04:01 -08:00
scripts Devicetree updates for v5.6: 2020-01-30 07:47:58 -08:00
security linux-kselftest-5.6-rc1-kunit 2020-01-29 15:25:34 -08:00
sound sound updates for 5.6-rc1 2020-01-28 16:26:57 -08:00
tools tc-testing: add missing 'nsPlugin' to basic.json 2020-02-04 09:30:00 +01:00
usr gen_initramfs_list.sh: fix 'bad variable name' error 2020-01-04 00:00:48 +09:00
virt PPC KVM fix for 5.5 2019-12-22 13:18:15 +01:00
.clang-format clang-format: Update with the latest for_each macro list 2019-08-31 10:00:51 +02:00
.cocciconfig
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore modpost: dump missing namespaces into a single modules.nsdeps file 2019-11-11 20:10:01 +09:00
.mailmap Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2020-01-28 15:38:56 -08:00
COPYING COPYING: use the new text with points to the license files 2018-03-23 12:41:45 -06:00
CREDITS open: introduce openat2(2) syscall 2020-01-18 09:19:18 -05:00
Kbuild kbuild: do not descend to ./Kbuild when cleaning 2019-08-21 21:03:58 +09:00
Kconfig docs: kbuild: convert docs to ReST and rename to *.rst 2019-06-14 14:21:21 -06:00
MAINTAINERS MAINTAINERS: correct entries for ISDN/mISDN section 2020-02-02 12:40:08 -08:00
Makefile Linux 5.5 2020-01-26 16:23:03 -08:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

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.