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RFC 8200 (IPv6) defines Hop-by-Hop options and Destination options
extension headers. Both of these carry a list of TLVs which is
only limited by the maximum length of the extension header (2048
bytes). By the spec a host must process all the TLVs in these
options, however these could be used as a fairly obvious
denial of service attack. I think this could in fact be
a significant DOS vector on the Internet, one mitigating
factor might be that many FWs drop all packets with EH (and
obviously this is only IPv6) so an Internet wide attack might not
be so effective (yet!).
By my calculation, the worse case packet with TLVs in a standard
1500 byte MTU packet that would be processed by the stack contains
1282 invidual TLVs (including pad TLVS) or 724 two byte TLVs. I
wrote a quick test program that floods a whole bunch of these
packets to a host and sure enough there is substantial time spent
in ip6_parse_tlv. These packets contain nothing but unknown TLVS
(that are ignored), TLV padding, and bogus UDP header with zero
payload length.
25.38% [kernel] [k] __fib6_clean_all
21.63% [kernel] [k] ip6_parse_tlv
4.21% [kernel] [k] __local_bh_enable_ip
2.18% [kernel] [k] ip6_pol_route.isra.39
1.98% [kernel] [k] fib6_walk_continue
1.88% [kernel] [k] _raw_write_lock_bh
1.65% [kernel] [k] dst_release
This patch adds configurable limits to Destination and Hop-by-Hop
options. There are three limits that may be set:
- Limit the number of options in a Hop-by-Hop or Destination options
extension header.
- Limit the byte length of a Hop-by-Hop or Destination options
extension header.
- Disallow unrecognized options in a Hop-by-Hop or Destination
options extension header.
The limits are set in corresponding sysctls:
ipv6.sysctl.max_dst_opts_cnt
ipv6.sysctl.max_hbh_opts_cnt
ipv6.sysctl.max_dst_opts_len
ipv6.sysctl.max_hbh_opts_len
If a max_*_opts_cnt is less than zero then unknown TLVs are disallowed.
The number of known TLVs that are allowed is the absolute value of
this number.
If a limit is exceeded when processing an extension header the packet is
dropped.
Default values are set to 8 for options counts, and set to INT_MAX
for maximum length. Note the choice to limit options to 8 is an
arbitrary guess (roughly based on the fact that the stack supports
three HBH options and just one destination option).
These limits have being proposed in draft-ietf-6man-rfc6434-bis.
Tested (by Martin Lau)
I tested out 1 thread (i.e. one raw_udp process).
I changed the net.ipv6.max_dst_(opts|hbh)_number between 8 to 2048.
With sysctls setting to 2048, the softirq% is packed to 100%.
With 8, the softirq% is almost unnoticable from mpstat.
v2;
- Code and documention cleanup.
- Change references of RFC2460 to be RFC8200.
- Add reference to RFC6434-bis where the limits will be in standard.
Signed-off-by: Tom Herbert <tom@quantonium.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Provide a rough overview of the state of the driver. And explain that the
driver operates in two modes: bridged and port-separated.
Signed-off-by: Egil Hjelmeland <egil.hjelmeland@zenitel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Smooth Cong Wang's bug fix into 'net-next'. Basically put
the bulk of the tcf_block_put() logic from 'net' into
tcf_block_put_ext(), but after the offload unbind.
Signed-off-by: David S. Miller <davem@davemloft.net>
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to address common misconceptions about what BPF is and what it's not
add short BPF Q&A that clarifies core BPF design principles and
answers some common questions.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This reverts commit 0cc2b4e5a020 (PM / QoS: Fix device resume latency PM
QoS) as it introduced regressions on multiple systems and the fix-up
in commit 2a9a86d5c813 (PM / QoS: Fix default runtime_pm device resume
latency) does not address all of them.
The original problem that commit 0cc2b4e5a020 was attempting to fix
will be addressed later.
Fixes: 0cc2b4e5a020 (PM / QoS: Fix device resume latency PM QoS)
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Several conflicts here.
NFP driver bug fix adding nfp_netdev_is_nfp_repr() check to
nfp_fl_output() needed some adjustments because the code block is in
an else block now.
Parallel additions to net/pkt_cls.h and net/sch_generic.h
A bug fix in __tcp_retransmit_skb() conflicted with some of
the rbtree changes in net-next.
The tc action RCU callback fixes in 'net' had some overlap with some
of the recent tcf_block reworking.
Signed-off-by: David S. Miller <davem@davemloft.net>
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This is very similar to the Macvlan VEPA mode, however, there is some
difference. IPvlan uses the mac-address of the lower device, so the VEPA
mode has implications of ICMP-redirects for packets destined for its
immediate neighbors sharing same master since the packets will have same
source and dest mac. The external switch/router will send redirect msg.
Having said that, this will be useful tool in terms of debugging
since IPvlan will not switch packets within its slaves and rely completely
on the external entity as intended in 802.1Qbg.
Signed-off-by: Mahesh Bandewar <maheshb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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IPvlan has always operated in bridge mode. However there are scenarios
where each slave should be able to talk through the master device but
not necessarily across each other. Think of an environment where each
of a namespace is a private and independant customer. In this scenario
the machine which is hosting these namespaces neither want to tell who
their neighbor is nor the individual namespaces care to talk to neighbor
on short-circuited network path.
This patch implements the mode that is very similar to the 'private' mode
in macvlan where individual slaves can send and receive traffic through
the master device, just that they can not talk among slave devices.
Signed-off-by: Mahesh Bandewar <maheshb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild fixes from Masahiro Yamada:
- fix O= building on dash
- remove unused dependency in Makefile
- fix default of a choice in Kconfig
- fix typos and documentation style
- fix command options unrecognized by sparse
* tag 'kbuild-fixes-v4.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kbuild: clang: fix build failures with sparse check
kbuild doc: a bundle of fixes on makefiles.txt
Makefile: kselftest: fix grammar typo
kbuild: Fix optimization level choice default
kbuild: drop unused symverfile in Makefile.modpost
kbuild: revert $(realpath ...) to $(shell cd ... && /bin/pwd)
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The special value of 0 for device resume latency PM QoS means
"no restriction", but there are two problems with that.
First, device resume latency PM QoS requests with 0 as the
value are always put in front of requests with positive
values in the priority lists used internally by the PM QoS
framework, causing 0 to be chosen as an effective constraint
value. However, that 0 is then interpreted as "no restriction"
effectively overriding the other requests with specific
restrictions which is incorrect.
Second, the users of device resume latency PM QoS have no
way to specify that *any* resume latency at all should be
avoided, which is an artificial limitation in general.
To address these issues, modify device resume latency PM QoS to
use S32_MAX as the "no constraint" value and 0 as the "no
latency at all" one and rework its users (the cpuidle menu
governor, the genpd QoS governor and the runtime PM framework)
to follow these changes.
Also add a special "n/a" value to the corresponding user space I/F
to allow user space to indicate that it cannot accept any resume
latencies at all for the given device.
Fixes: 85dc0b8a4019 (PM / QoS: Make it possible to expose PM QoS latency constraints)
Link: https://bugzilla.kernel.org/show_bug.cgi?id=197323
Reported-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Alex Shi <alex.shi@linaro.org>
Cc: All applicable <stable@vger.kernel.org>
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It does several fixes:
1. move the displaced ld example to its reasonable place.
2. add new example for command gzip.
3. fix 2 number errors.
4. fix format of chapter 7.x, make it looks the same as other chapters.
Signed-off-by: Cao jin <caoj.fnst@cn.fujitsu.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging and IIO fixes from Greg KH:
"Here are a small number of patches to resolve some reported IIO and a
staging driver problem. Nothing major here, full details are in the
shortlog below.
All have been in linux-next with no reported issues"
* tag 'staging-4.14-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
staging: bcm2835-audio: Fix memory corruption
iio: adc: at91-sama5d2_adc: fix probe error on missing trigger property
iio: adc: dln2-adc: fix build error
iio: dummy: events: Add missing break
staging: iio: ade7759: fix signed extension bug on shift of a u8
iio: pressure: zpa2326: Remove always-true check which confuses gcc
iio: proximity: as3935: noise detection + threshold changes
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There were quite a few overlapping sets of changes here.
Daniel's bug fix for off-by-ones in the new BPF branch instructions,
along with the added allowances for "data_end > ptr + x" forms
collided with the metadata additions.
Along with those three changes came veritifer test cases, which in
their final form I tried to group together properly. If I had just
trimmed GIT's conflict tags as-is, this would have split up the
meta tests unnecessarily.
In the socketmap code, a set of preemption disabling changes
overlapped with the rename of bpf_compute_data_end() to
bpf_compute_data_pointers().
Changes were made to the mv88e6060.c driver set addr method
which got removed in net-next.
The hyperv transport socket layer had a locking change in 'net'
which overlapped with a change of socket state macro usage
in 'net-next'.
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fixes from Thomas Gleixner:
"A set of small fixes mostly in the irq drivers area:
- Make the tango irq chip work correctly, which requires a new
function in the generiq irq chip implementation
- A set of updates to the GIC-V3 ITS driver removing a bogus BUG_ON()
and parsing the VCPU table size correctly"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
genirq: generic chip: remove irq_gc_mask_disable_reg_and_ack()
irqchip/tango: Use irq_gc_mask_disable_and_ack_set
genirq: generic chip: Add irq_gc_mask_disable_and_ack_set()
irqchip/gic-v3-its: Add missing changes to support 52bit physical address
irqchip/gic-v3-its: Fix the incorrect parsing of VCPU table size
irqchip/gic-v3-its: Fix the incorrect BUG_ON in its_init_vpe_domain()
DT: arm,gic-v3: Update the ITS size in the examples
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git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next
Johan Hedberg says:
====================
pull request: bluetooth-next 2017-10-19
Here's the first bluetooth-next pull request targeting the 4.15 kernel
release.
- Multiple fixes & improvements to the hci_bcm driver
- DT improvements, e.g. new local-bd-address property
- Fixes & improvements to ECDH usage. Private key is now generated by
the crypto subsystem.
- gcc-4.9 warning fixes
Please let me know if there are any issues pulling. Thanks.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Two things:
1) Update examples to show usage of metric
2) Discuss reasoning for using such a high metric.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Acked-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
David Howells says:
====================
rxrpc: Add bits for kernel services
Here are some patches that add a few things for kernel services to use:
(1) Allow service upgrade to be requested and allow the resultant actual
service ID to be obtained.
(2) Allow the RTT time of a call to be obtained.
(3) Allow a kernel service to find out if a call is still alive on a
server between transmitting a request and getting the reply.
(4) Allow data transmission to ignore signals if transmission progress is
being made in reasonable time. This is also usable by userspace by
passing MSG_WAITALL to sendmsg()[*].
[*] I'm not sure this is the right interface for this or whether a sockopt
should be used instead.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add fallback compatibility strings for R-Car Gen 1 and 2.
In the case of Renesas R-Car hardware we know that there are generations of
SoCs, f.e. Gen 1 and 2. But beyond that its not clear what the relationship
between IP blocks might be. For example, I believe that r8a7790 is older
than r8a7791 but that doesn't imply that the latter is a descendant of the
former or vice versa.
We can, however, by examining the documentation and behaviour of the
hardware at run-time observe that the current driver implementation appears
to be compatible with the IP blocks on SoCs within a given generation.
For the above reasons and convenience when enabling new SoCs a
per-generation fallback compatibility string scheme is being adopted for
drivers for Renesas SoCs.
Note that R-Car Gen2 and RZ/G1 have many compatible IP blocks. The
approach that has been consistently taken for other IP blocks is to name
common code, compatibility strings and so on after R-Car Gen2.
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Commit 764f80798b95 ("doc: Add RCU files to docbook-generation files")
added :external: options for RCU source files in the file
Documentation/core-api/kernel-api.rst. However, this now means nothing,
so this commit removes them.
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: Akira Yokosawa <akiyks@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Make AF_RXRPC accept MSG_WAITALL as a flag to sendmsg() to tell it to
ignore signals whilst loading up the message queue, provided progress is
being made in emptying the queue at the other side.
Progress is defined as the base of the transmit window having being
advanced within 2 RTT periods. If the period is exceeded with no progress,
sendmsg() will return anyway, indicating how much data has been copied, if
any.
Once the supplied buffer is entirely decanted, the sendmsg() will return.
Signed-off-by: David Howells <dhowells@redhat.com>
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Provide a couple of functions to allow cleaner handling of signals in a
kernel service. They are:
(1) rxrpc_kernel_get_rtt()
This allows the kernel service to find out the RTT time for a call, so
as to better judge how large a timeout to employ.
Note, though, that whilst this returns a value in nanoseconds, the
timeouts can only actually be in jiffies.
(2) rxrpc_kernel_check_life()
This returns a number that is updated when ACKs are received from the
peer (notably including PING RESPONSE ACKs which we can elicit by
sending PING ACKs to see if the call still exists on the server).
The caller should compare the numbers of two calls to see if the call
is still alive.
These can be used to provide an extending timeout rather than returning
immediately in the case that a signal occurs that would otherwise abort an
RPC operation. The timeout would be extended if the server is still
responsive and the call is still apparently alive on the server.
For most operations this isn't that necessary - but for FS.StoreData it is:
OpenAFS writes the data to storage as it comes in without making a backup,
so if we immediately abort it when partially complete on a CTRL+C, say, we
have no idea of the state of the file after the abort.
Signed-off-by: David Howells <dhowells@redhat.com>
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Provide support for a kernel service to make use of the service upgrade
facility. This involves:
(1) Pass an upgrade request flag to rxrpc_kernel_begin_call().
(2) Make rxrpc_kernel_recv_data() return the call's current service ID so
that the caller can detect service upgrade and see what the service
was upgraded to.
Signed-off-by: David Howells <dhowells@redhat.com>
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This adds a short document describing the views of how the Linux kernel
community feels about enforcing the license of the kernel.
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Alex Elder (Linaro) <elder@linaro.org>
Acked-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: Andy Gross <andy.gross@linaro.org>
Acked-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: Anna Schumaker <schumaker.anna@gmail.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Acked-by: Bart Van Assche <bart.vanassche@wdc.com>
Acked-by: Bhumika Goyal <bhumirks@gmail.com>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Acked-by: Borislav Petkov <bp@suse.de>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Christian König <christian.koenig@amd.com>
Acked-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Chuck Lever <chuck.lever@oracle.com>
Acked-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Darrick J. Wong (Oracle) <darrick.wong@oracle.com>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Acked-by: David Kershner <david.kershner@unisys.com>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Doug Ledford <dledford@redhat.com>
Acked-by: Fabio Estevam <festevam@gmail.com>
Acked-by: Felipe Balbi <balbi@kernel.org>
Acked-by: Florian Westphal <fw@strlen.de>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Hannes Reinecke <hare@suse.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Heiner Kallweit <hkallweit1@gmail.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Ivan Safonov <insafonov@gmail.com>
Acked-by: Jaegeuk Kim <jaegeuk@kernel.org>
Acked-by: Jan Kara (SUSE) <jack@suse.cz>
Acked-by: Javier Martinez Canillas <javier@dowhile0.org>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Jes Sorensen <Jes.Sorensen@gmail.com>
Acked-by: Jiri Kosina <jkosina@suse.cz>
Acked-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Joe Perches <joe@perches.com>
Acked-by: Joerg Roedel (SUSE) <jroedel@suse.de>
Acked-by: Johan Hovold <johan@kernel.org>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Acked-by: Juergen Gross <jgross@suse.com>
Acked-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: K. Y. Srinivasan <kys@microsoft.com>
Acked-by: Khalid Aziz <khalid@gonehiking.org>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Acked-by: Laura Abbott <laura@labbott.name>
Acked-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Leon Romanovsky <leon@kernel.org>
Acked-by: Linus Walleij (Linaro) <linus.walleij@linaro.org>
Acked-by: Lv Zheng <zetalog@gmail.com>
Acked-by: Martin K. Petersen (Oracle) <martin.petersen@oracle.com>
Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Acked-by: Mel Gorman <mgorman@suse.de>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Mike Marshall <hubcap@omnibond.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Paul Burton <paul.burton@mips.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Richard Weinberger <richard@nod.at>
Acked-by: Rik van Riel <riel@surriel.com>
Acked-by: Rob Clark <robdclark@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Sebastian Reichel (Collabora) <sre@kernel.org>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Acked-by: Shuah Khan <shuahkh@osg.samsung.com>
Acked-by: Simon Horman <horms@verge.net.au>
Acked-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Acked-by: Sven Eckelmann <sven@narfation.org>
Acked-by: Takashi Iwai (SUSE) <tiwai@suse.de>
Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: Thierry Reding <thierry.reding@gmail.com>
Acked-by: Tony Luck <tony.luck@gmail.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Vinod Koul <vkoul@kernel.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Acked-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/urgent
Pull irqchip updates for 4.14-rc5 from Marc Zyngier:
- Fix unfortunate mistake in the GICv3 ITS binding example
- Two fixes for the recently merged GICv4 support
- GICv3 ITS 52bit PA fixes
- Generic irqchip mask-ack fix, and its application to the tango irqchip
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git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus
Jonathan writes:
Second set of IIO fixes for the 4.14 cycle.
* ade7759
- Fix a signed extension bug.
* as3935
- The default noise and watch dog settings were such that the device
was unusuable in most applications. Add device tree parameters to
allow it to be configured to something that will actually work.
* at91-sama5d2 adc
- Fix handling of legacy device trees that don't provide the new
trigger edge property.
* dln2-adc
- Fix a missing Kconfig dependency on IIO_TRIGGERED_BUFFER.
* dummy driver
- Add a missing break so that writing in_voltage0_thresh_rising_en
doesn't always result in an error.
* zpa2326
- Drop a test for an always true condition so that gcc won't spit out
and unused variable warning.
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When the VMA based swap readahead was introduced, a new knob
/sys/kernel/mm/swap/vma_ra_max_order
was added as the max window of VMA swap readahead. This is to make it
possible to use different max window for VMA based readahead and
original physical readahead. But Minchan Kim pointed out that this will
cause a regression because setting page-cluster sysctl to zero cannot
disable swap readahead with the change.
To fix the regression, the page-cluster sysctl is used as the max window
of both the VMA based swap readahead and original physical swap
readahead. If more fine grained control is needed in the future, more
knobs can be added as the subordinate knobs of the page-cluster sysctl.
The vma_ra_max_order knob is deleted. Because the knob was introduced
in v4.14-rc1, and this patch is targeting being merged before v4.14
releasing, there should be no existing users of this newly added ABI.
Link: http://lkml.kernel.org/r/20171011070847.16003-1-ying.huang@intel.com
Fixes: ec560175c0b6fce ("mm, swap: VMA based swap readahead")
Signed-off-by: "Huang, Ying" <ying.huang@intel.com>
Reported-by: Minchan Kim <minchan@kernel.org>
Acked-by: Minchan Kim <minchan@kernel.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Shaohua Li <shli@kernel.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Cc: Tim Chen <tim.c.chen@intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Currently, the examples are using 2MB for the ITS size. Per the
specification (section 8.18 in ARM IHI 0069D), the ITS address map is
128KB.
Update the examples to match the specification.
Signed-off-by: Julien Grall <julien.grall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next
Johannes Berg says:
====================
Work continues in various areas:
* port authorized event for 4-way-HS offload (Avi)
* enable MFP optional for such devices (Emmanuel)
* Kees's timer setup patch for mac80211 mesh
(the part that isn't trivially scripted)
* improve VLAN vs. TXQ handling (myself)
* load regulatory database as firmware file (myself)
* with various other small improvements and cleanups
I merged net-next once in the meantime to allow Kees's
timer setup patch to go in.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Parsing and building C structures from a regdb is no longer needed
since the "firmware" file (regulatory.db) can be linked into the
kernel image to achieve the same effect.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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As the current regulatory database is only about 4k big, and already
difficult to extend, we decided that overall it would be better to
get rid of the complications with CRDA and load the database into the
kernel directly, but in a new format that is extensible.
The new file format can be extended since it carries a length field
on all the structs that need to be extensible.
In order to be able to request firmware when the module initializes,
move cfg80211 from subsys_initcall() to the later fs_initcall(); the
firmware loader is at the same level but linked earlier, so it can
be called from there. Otherwise, when both the firmware loader and
cfg80211 are built-in, the request will crash the kernel. We also
need to be before device_initcall() so that cfg80211 is available
for devices when they initialize.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Pull networking fixes from David Miller:
1) Fix object leak on IPSEC offload failure, from Steffen Klassert.
2) Fix range checks in ipset address range addition operations, from
Jozsef Kadlecsik.
3) Fix pernet ops unregistration order in ipset, from Florian Westphal.
4) Add missing netlink attribute policy for nl80211 packet pattern
attrs, from Peng Xu.
5) Fix PPP device destruction race, from Guillaume Nault.
6) Write marks get lost when BPF verifier processes R1=R2 register
assignments, causing incorrect liveness information and less state
pruning. Fix from Alexei Starovoitov.
7) Fix blockhole routes so that they are marked dead and therefore not
cached in sockets, otherwise IPSEC stops working. From Steffen
Klassert.
8) Fix broadcast handling of UDP socket early demux, from Paolo Abeni.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (37 commits)
cdc_ether: flag the u-blox TOBY-L2 and SARA-U2 as wwan
net: thunderx: mark expected switch fall-throughs in nicvf_main()
udp: fix bcast packet reception
netlink: do not set cb_running if dump's start() errs
ipv4: Fix traffic triggered IPsec connections.
ipv6: Fix traffic triggered IPsec connections.
ixgbe: incorrect XDP ring accounting in ethtool tx_frame param
net: ixgbe: Use new PCI_DEV_FLAGS_NO_RELAXED_ORDERING flag
Revert commit 1a8b6d76dc5b ("net:add one common config...")
ixgbe: fix masking of bits read from IXGBE_VXLANCTRL register
ixgbe: Return error when getting PHY address if PHY access is not supported
netfilter: xt_bpf: Fix XT_BPF_MODE_FD_PINNED mode of 'xt_bpf_info_v1'
netfilter: SYNPROXY: skip non-tcp packet in {ipv4, ipv6}_synproxy_hook
tipc: Unclone message at secondary destination lookup
tipc: correct initialization of skb list
gso: fix payload length when gso_size is zero
mlxsw: spectrum_router: Avoid expensive lookup during route removal
bpf: fix liveness marking
doc: Fix typo "8023.ad" in bonding documentation
ipv6: fix net.ipv6.conf.all.accept_dad behaviour for real
...
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Update Documentation/networking/netvsc.txt for TCP hash level setting
and related info.
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Should be "802.3ad" like everywhere else in the document.
Signed-off-by: Axel Beckert <abe@deuxchevaux.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c fixes from Wolfram Sang:
"I2C has three driver fixes for the newly introduced drivers and one ID
addition for the i801 driver"
* 'i2c/for-current-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: i2c-stm32f7: make structure stm32f7_setup static const
i2c: ensure termination of *_device_id tables
i2c: i801: Add support for Intel Cedar Fork
i2c: stm32f7: fix setup structure
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git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Pull MMC fixes from Ulf Hansson:
"MMC core:
- Fix driver strength selection when selecting hs400es
- Delete bounce buffer handling:
This change fixes a problem related to how bounce buffers are being
allocated. However, instead of trying to fix that, let's just
remove the mmc bounce buffer code altogether, as it has practically
no use.
MMC host:
- meson-gx: A couple of fixes related to clock/phase/tuning
- sdhci-xenon: Fix clock resource by adding an optional bus clock"
* tag 'mmc-v4.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
mmc: sdhci-xenon: Fix clock resource by adding an optional bus clock
mmc: meson-gx: include tx phase in the tuning process
mmc: meson-gx: fix rx phase reset
mmc: meson-gx: make sure the clock is rounded down
mmc: Delete bounce buffer handling
mmc: core: add driver strength selection when selecting hs400es
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Add optional local-bd-address property which is a 6-byte array
storing the assigned BD address. Since having a unique BD address
is critical, a per-device property value should be allocated.
This property is usually added by the boot loader which has access
to the provisioned data.
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
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In the same way as Ethernet, gather the Bluetooth related bindings in
one file. Introduce the bluetooth-bd-address property which can be used
to store the assigned BD address.
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
Pull overlayfs fixes from Miklos Szeredi:
"Fix a regression in 4.14 and one in 4.13. The latter is a case when
Docker is doing something it really shouldn't and gets away with it.
We now print a warning instead of erroring out.
There are also fixes to several error paths"
* 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
ovl: fix regression caused by exclusive upper/work dir protection
ovl: fix missing unlock_rename() in ovl_do_copy_up()
ovl: fix dentry leak in ovl_indexdir_cleanup()
ovl: fix dput() of ERR_PTR in ovl_cleanup_index()
ovl: fix error value printed in ovl_lookup_index()
ovl: fix may_write_real() for overlayfs directories
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Merging this brings in the timer_setup() change, which allows
me to apply Kees's mac80211 changes for it.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Just simple overlapping changes.
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper fixes from Mike Snitzer:
- a stable fix for the alignment of the event number reported at the
end of the 'DM_LIST_DEVICES' ioctl.
- a couple stable fixes for the DM crypt target.
- a DM raid health status reporting fix.
* tag 'for-4.14/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm raid: fix incorrect status output at the end of a "recover" process
dm crypt: reject sector_size feature if device length is not aligned to it
dm crypt: fix memory leak in crypt_ctr_cipher_old()
dm ioctl: fix alignment of event number in the device list
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There are three important fields that indicate the overall health and
status of an array: dev_health, sync_ratio, and sync_action. They tell
us the condition of the devices in the array, and the degree to which
the array is synchronized.
This commit fixes a condition that is reported incorrectly. When a member
of the array is being rebuilt or a new device is added, the "recover"
process is used to synchronize it with the rest of the array. When the
process is complete, but the sync thread hasn't yet been reaped, it is
possible for the state of MD to be:
mddev->recovery = [ MD_RECOVERY_RUNNING MD_RECOVERY_RECOVER MD_RECOVERY_DONE ]
curr_resync_completed = <max dev size> (but not MaxSector)
and all rdevs to be In_sync.
This causes the 'array_in_sync' output parameter that is passed to
rs_get_progress() to be computed incorrectly and reported as 'false' --
or not in-sync. This in turn causes the dev_health status characters to
be reported as all 'a', rather than the proper 'A'.
This can cause erroneous output for several seconds at a time when tools
will want to be checking the condition due to events that are raised at
the end of a sync process. Fix this by properly calculating the
'array_in_sync' return parameter in rs_get_progress().
Also, remove an unnecessary intermediate 'recovery_cp' variable in
rs_get_progress().
Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Pull networking fixes from David Miller:
1) Check iwlwifi 9000 reorder buffer out-of-space condition properly,
from Sara Sharon.
2) Fix RCU splat in qualcomm rmnet driver, from Subash Abhinov
Kasiviswanathan.
3) Fix session and tunnel release races in l2tp, from Guillaume Nault
and Sabrina Dubroca.
4) Fix endian bug in sctp_diag_dump(), from Dan Carpenter.
5) Several mlx5 driver fixes from the Mellanox folks (max flow counters
cap check, invalid memory access in IPoIB support, etc.)
6) tun_get_user() should bail if skb->len is zero, from Alexander
Potapenko.
7) Fix RCU lookups in inetpeer, from Eric Dumazet.
8) Fix locking in packet_do_bund().
9) Handle cb->start() error properly in netlink dump code, from Jason
A. Donenfeld.
10) Handle multicast properly in UDP socket early demux code. From Paolo
Abeni.
11) Several erspan bug fixes in ip_gre, from Xin Long.
12) Fix use-after-free in socket filter code, in order to handle the
fact that listener lock is no longer taken during the three-way TCP
handshake. From Eric Dumazet.
13) Fix infoleak in RTM_GETSTATS, from Nikolay Aleksandrov.
14) Fix tail call generation in x86-64 BPF JIT, from Alexei Starovoitov.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (77 commits)
net: 8021q: skip packets if the vlan is down
bpf: fix bpf_tail_call() x64 JIT
net: stmmac: dwmac-rk: Add RK3128 GMAC support
rndis_host: support Novatel Verizon USB730L
net: rtnetlink: fix info leak in RTM_GETSTATS call
socket, bpf: fix possible use after free
mlxsw: spectrum_router: Track RIF of IPIP next hops
mlxsw: spectrum_router: Move VRF refcounting
net: hns3: Fix an error handling path in 'hclge_rss_init_hw()'
net: mvpp2: Fix clock resource by adding an optional bus clock
r8152: add Linksys USB3GIGV1 id
l2tp: fix l2tp_eth module loading
ip_gre: erspan device should keep dst
ip_gre: set tunnel hlen properly in erspan_tunnel_init
ip_gre: check packet length and mtu correctly in erspan_xmit
ip_gre: get key from session_id correctly in erspan_rcv
tipc: use only positive error codes in messages
ppp: fix __percpu annotation
udp: perform source validation for mcast early demux
IPv4: early demux can return an error code
...
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Enforcing exclusive ownership on upper/work dirs caused a docker
regression: https://github.com/moby/moby/issues/34672.
Euan spotted the regression and pointed to the offending commit.
Vivek has brought the regression to my attention and provided this
reproducer:
Terminal 1:
mount -t overlay -o workdir=work,lowerdir=lower,upperdir=upper none
merged/
Terminal 2:
unshare -m
Terminal 1:
umount merged
mount -t overlay -o workdir=work,lowerdir=lower,upperdir=upper none
merged/
mount: /root/overlay-testing/merged: none already mounted or mount point
busy
To fix the regression, I replaced the error with an alarming warning.
With index feature enabled, mount does fail, but logs a suggestion to
override exclusive dir protection by disabling index.
Note that index=off mount does take the inuse locks, so a concurrent
index=off will issue the warning and a concurrent index=on mount will fail.
Documentation was updated to reflect this change.
Fixes: 2cac0c00a6cd ("ovl: get exclusive ownership on upper/work dirs")
Cc: <stable@vger.kernel.org> # v4.13
Reported-by: Euan Kemp <euank@euank.com>
Reported-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
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Add PCI ID for Intel Cedar Fork PCH.
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"Our first batch of fixes this release cycle, unfortunately a bit
noisier than usual. Two major groups stand out:
- Some pinctril dts/dtsi changes for stm32 due to a new driver being
merged during the merge window, and this aligns the DT contents
between the old format and the new. This could arguably be moved to
the next merge window but it also seemed relatively harmless to
include now.
- Amlogic/meson had driver changes merged that required devicetree
changes to avoid functional/performance regressions. I've already
asked them to be more careful about this going forward, and making
sure drivers are compatible with older DTs when they make these
kind of changes. The platform is actively being upstreamed so
there's a few things in flight, we've seen this happen before and
sometimes it's hard to catch in time.
Besides that there is the usual mix of minor fixes"
* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (33 commits)
ARM: dts: stm32: use right pinctrl compatible for stm32f469
ARM: dts: stm32: Fix STMPE1600 binding on stm32429i-eval board
ARM: defconfig: update Gemini defconfig
ARM: defconfig: FRAMEBUFFER_CONSOLE can no longer be =m
arm64: dts: rockchip: add the grf clk for dw-mipi-dsi on rk3399
reset: Restrict RESET_HSDK to ARC_SOC_HSDK or COMPILE_TEST
ARM: dts: da850-evm: add serial and ethernet aliases
ARM: dts: am43xx-epos-evm: Remove extra CPSW EMAC entry
ARM: dts: am33xx: Add spi alias to match SOC schematics
ARM: OMAP2+: hsmmc: fix logic to call either omap_hsmmc_init or omap_hsmmc_late_init but not both
ARM: dts: dra7: Set a default parent to mcasp3_ahclkx_mux
ARM: OMAP2+: dra7xx: Set OPT_CLKS_IN_RESET flag for gpio1
ARM: dts: nokia n900: drop unneeded/undocumented parts of the dts
arm64: dts: rockchip: Correct MIPI DPHY PLL clock on rk3399
arm64: dt marvell: Fix AP806 system controller size
MAINTAINERS: add Macchiatobin maintainers entry
ARC: reset: remove the misleading v1 suffix all over
ARC: reset: add missing DT binding documentation for HSDKv1 reset driver
ARC: reset: Only build on archs that have IOMEM
ARM: at91: Replace uses of virt_to_phys with __pa_symbol
...
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Update my imgtec.com and personal email address to my kernel.org one in
a few places as MIPS will soon no longer be part of Imagination
Technologies, and add mappings in .mailcap so get_maintainer.pl reports
the right address.
Signed-off-by: James Hogan <jhogan@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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On Armada 7K/8K we need to explicitly enable the bus clock. The bus clock
is optional because not all the SoCs need them but at least for Armada
7K/8K it is actually mandatory.
The binding documentation is updating accordingly.
Without this patch the kernel hand during boot if the mvpp2.2 network
driver was not present in the kernel. Indeed the clock needed by the
xenon controller was set by the network driver.
Fixes: 3a3748dba881 ("mmc: sdhci-xenon: Add Marvell Xenon SDHC core
functionality)"
CC: Stable <stable@vger.kernel.org>
Tested-by: Zhoujie Wu <zjwu@marvell.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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into fixes
Reset controller fixes for v4.14
- Remove misleading HSDK v1 suffix, as there is no v2 planned
- Add missing DT binding documentation for HSDK reset driver
- Fix HSDK reset driver dependencies
* tag 'reset-fixes-for-4.14' of git://git.pengutronix.de/git/pza/linux:
reset: Restrict RESET_HSDK to ARC_SOC_HSDK or COMPILE_TEST
ARC: reset: remove the misleading v1 suffix all over
ARC: reset: add missing DT binding documentation for HSDKv1 reset driver
ARC: reset: Only build on archs that have IOMEM
Signed-off-by: Olof Johansson <olof@lixom.net>
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