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Pablo Neira Ayuso says:
====================
Netfilter/IPVS fixes for net
The following patchset contains Netfilter/IPVS fixes for your net tree,
they are:
1) When using IPVS in direct-routing mode, normal traffic from the LVS
host to a back-end server is sometimes incorrectly NATed on the way
back into the LVS host. Patch to fix this from Julian Anastasov.
2) Calm down clang compilation warning in ctnetlink due to type
mismatch, from Matthias Kaehlcke.
3) Do not re-setup NAT for conntracks that are already confirmed, this
is fixing a problem that was introduced in the previous nf-next batch.
Patch from Liping Zhang.
4) Do not allow conntrack helper removal from userspace cthelper
infrastructure if already in used. This comes with an initial patch
to introduce nf_conntrack_helper_put() that is required by this fix.
From Liping Zhang.
5) Zero the pad when copying data to userspace, otherwise iptables fails
to remove rules. This is a follow up on the patchset that sorts out
the internal match/target structure pointer leak to userspace. Patch
from the same author, Willem de Bruijn. This also comes with a build
failure when CONFIG_COMPAT is not on, coming in the last patch of
this series.
6) SYNPROXY crashes with conntrack entries that are created via
ctnetlink, more specifically via conntrackd state sync. Patch from
Eric Leblond.
7) RCU safe iteration on set element dumping in nf_tables, from
Liping Zhang.
8) Missing sanitization of immediate date for the bitwise and cmp
expressions in nf_tables.
9) Refcounting logic for chain and objects from set elements does not
integrate into the nf_tables 2-phase commit protocol.
10) Missing sanitization of target verdict in ebtables arpreply target,
from Gao Feng.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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The patch in the Fixes references COMPAT_XT_ALIGN in the definition
of XT_DATA_TO_USER, outside an #ifdef CONFIG_COMPAT block.
Split XT_DATA_TO_USER into separate compat and non compat variants and
define the first inside an CONFIG_COMPAT block.
This simplifies both variants by removing branches inside the macro.
Fixes: 324318f0248c ("netfilter: xtables: zero padding in data_to_user")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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The info->target comes from userspace and it would be used directly.
So we need to add the sanity check to make sure it is a valid standard
target, although the ebtables tool has already checked it. Kernel needs
to validate anything coming from userspace.
If the target is set as an evil value, it would break the ebtables
and cause a panic. Because the non-standard target is treated as one
offset.
Now add one helper function ebt_invalid_target, and we would replace
the macro INVALID_TARGET later.
Signed-off-by: Gao Feng <gfree.wind@vip.163.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Andreas reports that the following incremental update using our commit
protocol doesn't work.
# nft -f incremental-update.nft
delete element ip filter client_to_any { 10.180.86.22 : goto CIn_1 }
delete chain ip filter CIn_1
... Error: Could not process rule: Device or resource busy
The existing code is not well-integrated into the commit phase protocol,
since element deletions do not result in refcount decrement from the
preparation phase. This results in bogus EBUSY errors like the one
above.
Two new functions come with this patch:
* nft_set_elem_activate() function is used from the abort path, to
restore the set element refcounting on objects that occurred from
the preparation phase.
* nft_set_elem_deactivate() that is called from nft_del_setelem() to
decrement set element refcounting on objects from the preparation
phase in the commit protocol.
The nft_data_uninit() has been renamed to nft_data_release() since this
function does not uninitialize any data store in the data register,
instead just releases the references to objects. Moreover, a new
function nft_data_hold() has been introduced to be used from
nft_set_elem_activate().
Reported-by: Andreas Schultz <aschultz@tpip.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Do not assume userspace always sends us NFT_DATA_VALUE for bitwise and
cmp expressions. Although NFT_DATA_VERDICT does not make any sense, it
is still possible to handcraft a netlink message using this incorrect
data type.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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When dumping the elements related to a specified set, we may invoke the
nf_tables_dump_set with the NFNL_SUBSYS_NFTABLES lock not acquired. So
we should use the proper rcu operation to avoid race condition, just
like other nft dump operations.
Signed-off-by: Liping Zhang <zlpnobody@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch fixes the creation of connection tracking entry from
netlink when synproxy is used. It was missing the addition of
the synproxy extension.
This was causing kernel crashes when a conntrack entry created by
conntrackd was used after the switch of traffic from active node
to the passive node.
Signed-off-by: Eric Leblond <eric@regit.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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When looking up an iptables rule, the iptables binary compares the
aligned match and target data (XT_ALIGN). In some cases this can
exceed the actual data size to include padding bytes.
Before commit f77bc5b23fb1 ("iptables: use match, target and data
copy_to_user helpers") the malloc()ed bytes were overwritten by the
kernel with kzalloced contents, zeroing the padding and making the
comparison succeed. After this patch, the kernel copies and clears
only data, leaving the padding bytes undefined.
Extend the clear operation from data size to aligned data size to
include the padding bytes, if any.
Padding bytes can be observed in both match and target, and the bug
triggered, by issuing a rule with match icmp and target ACCEPT:
iptables -t mangle -A INPUT -i lo -p icmp --icmp-type 1 -j ACCEPT
iptables -t mangle -D INPUT -i lo -p icmp --icmp-type 1 -j ACCEPT
Fixes: f77bc5b23fb1 ("iptables: use match, target and data copy_to_user helpers")
Reported-by: Paul Moore <pmoore@redhat.com>
Reported-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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http://git.kernel.org/pub/scm/linux/kernel/git/horms/ipvs
Simon Horman says:
====================
IPVS Fixes for v4.12
please consider this fix to IPVS for v4.12.
* It is a fix from Julian Anastasov to only SNAT SNAT packet replies only for
NATed connections
My understanding is that this fix is appropriate for 4.9.25, 4.10.13, 4.11
as well as the nf tree. Julian has separately posted backports for other
-stable kernels; please see:
* [PATCH 3.2.88,3.4.113 -stable 1/3] ipvs: SNAT packet replies only for
NATed connections
* [PATCH 3.10.105,3.12.73,3.16.43,4.1.39 -stable 2/3] ipvs: SNAT packet
replies only for NATed connections
* [PATCH 4.4.65 -stable 3/3] ipvs: SNAT packet replies only for NATed
connections
====================
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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We do not check if packet from real server is for NAT
connection before performing SNAT. This causes problems
for setups that use DR/TUN and allow local clients to
access the real server directly, for example:
- local client in director creates IPVS-DR/TUN connection
CIP->VIP and the request packets are routed to RIP.
Talks are finished but IPVS connection is not expired yet.
- second local client creates non-IPVS connection CIP->RIP
with same reply tuple RIP->CIP and when replies are received
on LOCAL_IN we wrongly assign them for the first client
connection because RIP->CIP matches the reply direction.
As result, IPVS SNATs replies for non-IPVS connections.
The problem is more visible to local UDP clients but in rare
cases it can happen also for TCP or remote clients when the
real server sends the reply traffic via the director.
So, better to be more precise for the reply traffic.
As replies are not expected for DR/TUN connections, better
to not touch them.
Reported-by: Nick Moriarty <nick.moriarty@york.ac.uk>
Tested-by: Nick Moriarty <nick.moriarty@york.ac.uk>
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
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We can still delete the ct helper even if it is in use, this will cause
a use-after-free error. In more detail, I mean:
# nfct helper add ssdp inet udp
# iptables -t raw -A OUTPUT -p udp -j CT --helper ssdp
# nfct helper delete ssdp //--> oops, succeed!
BUG: unable to handle kernel paging request at 000026ca
IP: 0x26ca
[...]
Call Trace:
? ipv4_helper+0x62/0x80 [nf_conntrack_ipv4]
nf_hook_slow+0x21/0xb0
ip_output+0xe9/0x100
? ip_fragment.constprop.54+0xc0/0xc0
ip_local_out+0x33/0x40
ip_send_skb+0x16/0x80
udp_send_skb+0x84/0x240
udp_sendmsg+0x35d/0xa50
So add reference count to fix this issue, if ct helper is used by
others, reject the delete request.
Apply this patch:
# nfct helper delete ssdp
nfct v1.4.3: netlink error: Device or resource busy
Signed-off-by: Liping Zhang <zlpnobody@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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And convert module_put invocation to nf_conntrack_helper_put, this is
prepared for the followup patch, which will add a refcnt for cthelper,
so we can reject the deleting request when cthelper is in use.
Signed-off-by: Liping Zhang <zlpnobody@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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We cannot setup nat info if the ct has been confirmed already, else,
different cpu may race to handle the same ct. In extreme situation,
we may hit the "BUG_ON(nf_nat_initialized(ct, maniptype))" in the
nf_nat_setup_info.
Also running the following commands will easily hit NF_CT_ASSERT in
nf_conntrack_alter_reply:
# nft flush ruleset
# ping -c 2 -W 1 1.1.1.111 &
# nft add table t
# nft add chain t c {type nat hook postrouting priority 0 \;}
# nft add rule t c snat to 4.5.6.7
WARNING: CPU: 1 PID: 10065 at net/netfilter/nf_conntrack_core.c:1472
nf_conntrack_alter_reply+0x9a/0x1a0 [nf_conntrack]
[...]
Call Trace:
nf_nat_setup_info+0xad/0x840 [nf_nat]
? deactivate_slab+0x65d/0x6c0
nft_nat_eval+0xcd/0x100 [nft_nat]
nft_do_chain+0xff/0x5d0 [nf_tables]
? mark_held_locks+0x6f/0xa0
? __local_bh_enable_ip+0x70/0xa0
? trace_hardirqs_on_caller+0x11f/0x190
? ipt_do_table+0x310/0x610
? trace_hardirqs_on+0xd/0x10
? __local_bh_enable_ip+0x70/0xa0
? ipt_do_table+0x32b/0x610
? __lock_acquire+0x2ac/0x1580
? ipt_do_table+0x32b/0x610
nft_nat_do_chain+0x65/0x80 [nft_chain_nat_ipv4]
nf_nat_ipv4_fn+0x1ae/0x240 [nf_nat_ipv4]
nf_nat_ipv4_out+0x4a/0xf0 [nf_nat_ipv4]
nft_nat_ipv4_out+0x15/0x20 [nft_chain_nat_ipv4]
nf_hook_slow+0x2c/0xf0
ip_output+0x154/0x270
So for the confirmed ct, just ignore it and return NF_ACCEPT.
Fixes: 9a08ecfe74d7 ("netfilter: don't attach a nat extension by default")
Signed-off-by: Liping Zhang <zlpnobody@gmail.com>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Not all parameters passed to ctnetlink_parse_tuple() and
ctnetlink_exp_dump_tuple() match the enum type in the signatures of these
functions. Since this is intended change the argument type of to be an
unsigned integer value.
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Pull MD fixes from Shaohua Li:
- Several bug fixes for raid5-cache from Song Liu, mainly handle
journal disk error
- Fix bad block handling in choosing raid1 disk from Tomasz Majchrzak
- Simplify external metadata array sysfs handling from Artur
Paszkiewicz
- Optimize raid0 discard handling from me, now raid0 will dispatch
large discard IO directly to underlayer disks.
* tag 'md/4.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
raid1: prefer disk without bad blocks
md/r5cache: handle sync with data in write back cache
md/r5cache: gracefully handle journal device errors for writeback mode
md/raid1/10: avoid unnecessary locking
md/raid5-cache: in r5l_do_submit_io(), submit io->split_bio first
md/md0: optimize raid0 discard handling
md: don't return -EAGAIN in md_allow_write for external metadata arrays
md/raid5: make use of spin_lock_irq over local_irq_disable + spin_lock
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If an array consists of two drives and the first drive has the bad
block, the read request to the region overlapping the bad block chooses
the same disk (with bad block) as device to read from over and over and
the request gets stuck. If the first disk only partially overlaps with
bad block, it becomes a candidate ("best disk") for shorter range of
sectors. The second disk is capable of reading the entire requested
range and it is updated accordingly, however it is not recorded as a
best device for the request. In the end the request is sent to the first
disk to read entire range of sectors. It fails and is re-tried in a
moment but with the same outcome.
Actually it is quite likely scenario but it had little exposure in my
test until commit 715d40b93b10 ("md/raid1: add failfast handling for
reads.") removed preference for idle disk. Such scenario had been
passing as second disk was always chosen when idle.
Reset a candidate ("best disk") to read from if disk can read entire
range. Do it only if other disk has already been chosen as a candidate
for a smaller range. The head position / disk type logic will select
the best disk to read from - it is fine as disk with bad block won't be
considered for it.
Signed-off-by: Tomasz Majchrzak <tomasz.majchrzak@intel.com>
Signed-off-by: Shaohua Li <shli@fb.com>
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Currently, sync of raid456 array cannot make progress when hitting
data in writeback r5cache.
This patch fixes this issue by flushing cached data of the stripe
before processing the sync request. This is achived by:
1. In handle_stripe(), do not set STRIPE_SYNCING if the stripe is
in write back cache;
2. In r5c_try_caching_write(), handle the stripe in sync with write
through;
3. In do_release_stripe(), make stripe in sync write out and send
it to the state machine.
Shaohua: explictly set STRIPE_HANDLE after write out completed
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Shaohua Li <shli@fb.com>
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For the raid456 with writeback cache, when journal device failed during
normal operation, it is still possible to persist all data, as all
pending data is still in stripe cache. However, it is necessary to handle
journal failure gracefully.
During journal failures, the following logic handles the graceful shutdown
of journal:
1. raid5_error() marks the device as Faulty and schedules async work
log->disable_writeback_work;
2. In disable_writeback_work (r5c_disable_writeback_async), the mddev is
suspended, set to write through, and then resumed. mddev_suspend()
flushes all cached stripes;
3. All cached stripes need to be flushed carefully to the RAID array.
This patch fixes issues within the process above:
1. In r5c_update_on_rdev_error() schedule disable_writeback_work for
journal failures;
2. In r5c_disable_writeback_async(), wait for MD_SB_CHANGE_PENDING,
since raid5_error() updates superblock.
3. In handle_stripe(), allow stripes with data in journal (s.injournal > 0)
to make progress during log_failed;
4. In delay_towrite(), if log failed only process data in the cache (skip
new writes in dev->towrite);
5. In __get_priority_stripe(), process loprio_list during journal device
failures.
6. In raid5_remove_disk(), wait for all cached stripes are flushed before
calling log_exit().
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Shaohua Li <shli@fb.com>
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If we add bios to block plugging list, locking is unnecessry, since the block
unplug is guaranteed not to run at that time.
Reviewed-by: NeilBrown <neilb@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>
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In r5l_do_submit_io(), it is necessary to check io->split_bio before
submit io->current_bio. This is because, endio of current_bio may
free the whole IO unit, and thus change io->split_bio.
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Shaohua Li <shli@fb.com>
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There are complaints that raid0 discard handling is slow. Currently we
divide discard request into chunks and dispatch to underlayer disks. The
block layer will do merge to form big requests. This causes a lot of
request split/merge and uses significant CPU time.
A simple idea is to calculate the range for each raid disk for an IO
request and send a discard request to raid disks, which will avoid the
split/merge completely. Previously Coly tried the approach, but the
implementation was too complex because of raid0 zones. This patch always
split bio in zone boundary and handle bio within one zone. It simplifies
the implementation a lot.
Reviewed-by: NeilBrown <neilb@suse.com>
Acked-by: Coly Li <colyli@suse.de>
Signed-off-by: Shaohua Li <shli@fb.com>
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This essentially reverts commit b5470dc5fc18 ("md: resolve external
metadata handling deadlock in md_allow_write") with some adjustments.
Since commit 6791875e2e53 ("md: make reconfig_mutex optional for writes
to md sysfs files.") changing array_state to 'active' does not use
mddev_lock() and will not cause a deadlock with md_allow_write(). This
revert simplifies userspace tools that write to sysfs attributes like
"stripe_cache_size" or "consistency_policy" because it removes the need
for special handling for external metadata arrays, checking for EAGAIN
and retrying the write.
Signed-off-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Signed-off-by: Shaohua Li <shli@fb.com>
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On mainline, there is no functional difference, just less code, and
symmetric lock/unlock paths.
On PREEMPT_RT builds, this fixes the following warning, seen by
Alexander GQ Gerasiov, due to the sleeping nature of spinlocks.
BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:993
in_atomic(): 0, irqs_disabled(): 1, pid: 58, name: kworker/u12:1
CPU: 5 PID: 58 Comm: kworker/u12:1 Tainted: G W 4.9.20-rt16-stand6-686 #1
Hardware name: Supermicro SYS-5027R-WRF/X9SRW-F, BIOS 3.2a 10/28/2015
Workqueue: writeback wb_workfn (flush-253:0)
Call Trace:
dump_stack+0x47/0x68
? migrate_enable+0x4a/0xf0
___might_sleep+0x101/0x180
rt_spin_lock+0x17/0x40
add_stripe_bio+0x4e3/0x6c0 [raid456]
? preempt_count_add+0x42/0xb0
raid5_make_request+0x737/0xdd0 [raid456]
Reported-by: Alexander GQ Gerasiov <gq@redlab-i.ru>
Tested-by: Alexander GQ Gerasiov <gq@redlab-i.ru>
Signed-off-by: Julia Cartwright <julia@ni.com>
Signed-off-by: Shaohua Li <shli@fb.com>
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Pull networking fixes from David Miller:
1) Don't allow negative TCP reordering values, from Soheil Hassas
Yeganeh.
2) Don't overflow while parsing ipv6 header options, from Craig Gallek.
3) Handle more cleanly the case where an individual route entry during
a dump will not fit into the allocated netlink SKB, from David
Ahern.
4) Add missing CONFIG_INET dependency for mlx5e, from Arnd Bergmann.
5) Allow neighbour updates to converge more quickly via gratuitous
ARPs, from Ihar Hrachyshka.
6) Fix compile error from CONFIG_INET is disabled, from Eric Dumazet.
7) Fix use after free in x25 protocol init, from Lin Zhang.
8) Valid VLAN pvid ranges passed into br_validate(), from Tobias
Jungel.
9) NULL out address lists in child sockets in SCTP, this is similar to
the fix we made for inet connection sockets last week. From Eric
Dumazet.
10) Fix NULL deref in mlxsw driver, from Ido Schimmel.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (27 commits)
mlxsw: spectrum: Avoid possible NULL pointer dereference
sh_eth: Do not print an error message for probe deferral
sh_eth: Use platform device for printing before register_netdev()
mlxsw: spectrum_router: Fix rif counter freeing routine
mlxsw: spectrum_dpipe: Fix incorrect entry index
cxgb4: update latest firmware version supported
qmi_wwan: add another Lenovo EM74xx device ID
sctp: do not inherit ipv6_{mc|ac|fl}_list from parent
udp: make *udp*_queue_rcv_skb() functions static
bridge: netlink: check vlan_default_pvid range
net: ethernet: faraday: To support device tree usage.
net: x25: fix one potential use-after-free issue
bpf: adjust verifier heuristics
ipv6: Check ip6_find_1stfragopt() return value properly.
selftests/bpf: fix broken build due to types.h
bnxt_en: Check status of firmware DCBX agent before setting DCB_CAP_DCBX_HOST.
bnxt_en: Call bnxt_dcb_init() after getting firmware DCBX configuration.
net: fix compile error in skb_orphan_partial()
ipv6: Prevent overrun when parsing v6 header options
neighbour: update neigh timestamps iff update is effective
...
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In case we got an FDB notification for a port that doesn't exist we
execute an FDB entry delete to prevent it from re-appearing the next
time we poll for notifications.
If the operation failed we would trigger a NULL pointer dereference as
'mlxsw_sp_port' is NULL.
Fix it by reporting the error using the underlying bus device instead.
Fixes: 12f1501e7511 ("mlxsw: spectrum: remove FDB entry in case we get unknown object notification")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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EPROBE_DEFER is not an error, hence printing an error message like
sh-eth ee700000.ethernet: failed to initialise MDIO
may confuse the user.
To fix this, suppress the error message in case of probe deferral.
While at it, shorten the message, and add the actual error code.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The MDIO initialization failure message is printed using the network
device, before it has been registered, leading to:
(null): failed to initialise MDIO
Use the platform device instead to fix this:
sh-eth ee700000.ethernet: failed to initialise MDIO
Fixes: daacf03f0bbfefee ("sh_eth: Register MDIO bus before registering the network device")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Jiri Pirko says:
====================
mlxsw: couple of fixes
Couple of fixes from Arkadi
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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During rif counter freeing the counter index can be invalid. Add check
of validity before freeing the counter.
Fixes: e0c0afd8aa4e ("mlxsw: spectrum: Support for counters on router interfaces")
Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In case of disabled counters the entry index will be incorrect. Fix this
by moving the entry index set before the counter status check.
Fixes: 2ba5999f009d ("mlxsw: spectrum: Add Support for erif table entries access")
Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Change t4fw_version.h to update latest firmware version
number to 1.16.43.0.
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In their infinite wisdom, and never ending quest for end user frustration,
Lenovo has decided to use a new USB device ID for the wwan modules in
their 2017 laptops. The actual hardware is still the Sierra Wireless
EM7455 or EM7430, depending on region.
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
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SCTP needs fixes similar to 83eaddab4378 ("ipv6/dccp: do not inherit
ipv6_mc_list from parent"), otherwise bad things can happen.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Since the udp memory accounting refactor, we don't need any more
to export the *udp*_queue_rcv_skb(). Make them static and fix
a couple of sparse warnings:
net/ipv4/udp.c:1615:5: warning: symbol 'udp_queue_rcv_skb' was not
declared. Should it be static?
net/ipv6/udp.c:572:5: warning: symbol 'udpv6_queue_rcv_skb' was not
declared. Should it be static?
Fixes: 850cbaddb52d ("udp: use it's own memory accounting schema")
Fixes: c915fe13cbaa ("udplite: fix NULL pointer dereference")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Currently it is allowed to set the default pvid of a bridge to a value
above VLAN_VID_MASK (0xfff). This patch adds a check to br_validate and
returns -EINVAL in case the pvid is out of bounds.
Reproduce by calling:
[root@test ~]# ip l a type bridge
[root@test ~]# ip l a type dummy
[root@test ~]# ip l s bridge0 type bridge vlan_filtering 1
[root@test ~]# ip l s bridge0 type bridge vlan_default_pvid 9999
[root@test ~]# ip l s dummy0 master bridge0
[root@test ~]# bridge vlan
port vlan ids
bridge0 9999 PVID Egress Untagged
dummy0 9999 PVID Egress Untagged
Fixes: 0f963b7592ef ("bridge: netlink: add support for default_pvid")
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: Tobias Jungel <tobias.jungel@bisdn.de>
Acked-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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To support device tree usage for ftmac100.
Signed-off-by: Greentime Hu <green.hu@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The function x25_init is not properly unregister related resources
on error handler.It is will result in kernel oops if x25_init init
failed, so add properly unregister call on error handler.
Also, i adjust the coding style and make x25_register_sysctl properly
return failure.
Signed-off-by: linzhang <xiaolou4617@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Current limits with regards to processing program paths do not
really reflect today's needs anymore due to programs becoming
more complex and verifier smarter, keeping track of more data
such as const ALU operations, alignment tracking, spilling of
PTR_TO_MAP_VALUE_ADJ registers, and other features allowing for
smarter matching of what LLVM generates.
This also comes with the side-effect that we result in fewer
opportunities to prune search states and thus often need to do
more work to prove safety than in the past due to different
register states and stack layout where we mismatch. Generally,
it's quite hard to determine what caused a sudden increase in
complexity, it could be caused by something as trivial as a
single branch somewhere at the beginning of the program where
LLVM assigned a stack slot that is marked differently throughout
other branches and thus causing a mismatch, where verifier
then needs to prove safety for the whole rest of the program.
Subsequently, programs with even less than half the insn size
limit can get rejected. We noticed that while some programs
load fine under pre 4.11, they get rejected due to hitting
limits on more recent kernels. We saw that in the vast majority
of cases (90+%) pruning failed due to register mismatches. In
case of stack mismatches, majority of cases failed due to
different stack slot types (invalid, spill, misc) rather than
differences in spilled registers.
This patch makes pruning more aggressive by also adding markers
that sit at conditional jumps as well. Currently, we only mark
jump targets for pruning. For example in direct packet access,
these are usually error paths where we bail out. We found that
adding these markers, it can reduce number of processed insns
by up to 30%. Another option is to ignore reg->id in probing
PTR_TO_MAP_VALUE_OR_NULL registers, which can help pruning
slightly as well by up to 7% observed complexity reduction as
stand-alone. Meaning, if a previous path with register type
PTR_TO_MAP_VALUE_OR_NULL for map X was found to be safe, then
in the current state a PTR_TO_MAP_VALUE_OR_NULL register for
the same map X must be safe as well. Last but not least the
patch also adds a scheduling point and bumps the current limit
for instructions to be processed to a more adequate value.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Do not use unsigned variables to see if it returns a negative
error or not.
Fixes: 2423496af35d ("ipv6: Prevent overrun when parsing v6 header options")
Reported-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Commit 0a5539f66133 ("bpf: Provide a linux/types.h override
for bpf selftests.") caused a build failure for tools/testing/selftest/bpf
because of some missing types:
$ make -C tools/testing/selftests/bpf/
...
In file included from /home/yhs/work/net-next/tools/testing/selftests/bpf/test_pkt_access.c:8:
../../../include/uapi/linux/bpf.h:170:3: error: unknown type name '__aligned_u64'
__aligned_u64 key;
...
/usr/include/linux/swab.h:160:8: error: unknown type name '__always_inline'
static __always_inline __u16 __swab16p(const __u16 *p)
...
The type __aligned_u64 is defined in linux:include/uapi/linux/types.h.
The fix is to copy missing type definition into
tools/testing/selftests/bpf/include/uapi/linux/types.h.
Adding additional include "string.h" resolves __always_inline issue.
Fixes: 0a5539f66133 ("bpf: Provide a linux/types.h override for bpf selftests.")
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Michael Chan says:
====================
bnxt_en: DCBX fixes.
2 bug fixes for the case where the NIC's firmware DCBX agent is enabled.
With these fixes, we will return the proper information to lldpad.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Otherwise, all the host based DCBX settings from lldpad will fail if the
firmware DCBX agent is running.
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In the current code, bnxt_dcb_init() is called too early before we
determine if the firmware DCBX agent is running or not. As a result,
we are not setting the DCB_CAP_DCBX_HOST and DCB_CAP_DCBX_LLD_MANAGED
flags properly to report to DCBNL.
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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If CONFIG_INET is not set, net/core/sock.c can not compile :
net/core/sock.c: In function ‘skb_orphan_partial’:
net/core/sock.c:1810:2: error: implicit declaration of function
‘skb_is_tcp_pure_ack’ [-Werror=implicit-function-declaration]
if (skb_is_tcp_pure_ack(skb))
^
Fix this by always including <net/tcp.h>
Fixes: f6ba8d33cfbb ("netem: fix skb_orphan_partial()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The KASAN warning repoted below was discovered with a syzkaller
program. The reproducer is basically:
int s = socket(AF_INET6, SOCK_RAW, NEXTHDR_HOP);
send(s, &one_byte_of_data, 1, MSG_MORE);
send(s, &more_than_mtu_bytes_data, 2000, 0);
The socket() call sets the nexthdr field of the v6 header to
NEXTHDR_HOP, the first send call primes the payload with a non zero
byte of data, and the second send call triggers the fragmentation path.
The fragmentation code tries to parse the header options in order
to figure out where to insert the fragment option. Since nexthdr points
to an invalid option, the calculation of the size of the network header
can made to be much larger than the linear section of the skb and data
is read outside of it.
This fix makes ip6_find_1stfrag return an error if it detects
running out-of-bounds.
[ 42.361487] ==================================================================
[ 42.364412] BUG: KASAN: slab-out-of-bounds in ip6_fragment+0x11c8/0x3730
[ 42.365471] Read of size 840 at addr ffff88000969e798 by task ip6_fragment-oo/3789
[ 42.366469]
[ 42.366696] CPU: 1 PID: 3789 Comm: ip6_fragment-oo Not tainted 4.11.0+ #41
[ 42.367628] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.1-1ubuntu1 04/01/2014
[ 42.368824] Call Trace:
[ 42.369183] dump_stack+0xb3/0x10b
[ 42.369664] print_address_description+0x73/0x290
[ 42.370325] kasan_report+0x252/0x370
[ 42.370839] ? ip6_fragment+0x11c8/0x3730
[ 42.371396] check_memory_region+0x13c/0x1a0
[ 42.371978] memcpy+0x23/0x50
[ 42.372395] ip6_fragment+0x11c8/0x3730
[ 42.372920] ? nf_ct_expect_unregister_notifier+0x110/0x110
[ 42.373681] ? ip6_copy_metadata+0x7f0/0x7f0
[ 42.374263] ? ip6_forward+0x2e30/0x2e30
[ 42.374803] ip6_finish_output+0x584/0x990
[ 42.375350] ip6_output+0x1b7/0x690
[ 42.375836] ? ip6_finish_output+0x990/0x990
[ 42.376411] ? ip6_fragment+0x3730/0x3730
[ 42.376968] ip6_local_out+0x95/0x160
[ 42.377471] ip6_send_skb+0xa1/0x330
[ 42.377969] ip6_push_pending_frames+0xb3/0xe0
[ 42.378589] rawv6_sendmsg+0x2051/0x2db0
[ 42.379129] ? rawv6_bind+0x8b0/0x8b0
[ 42.379633] ? _copy_from_user+0x84/0xe0
[ 42.380193] ? debug_check_no_locks_freed+0x290/0x290
[ 42.380878] ? ___sys_sendmsg+0x162/0x930
[ 42.381427] ? rcu_read_lock_sched_held+0xa3/0x120
[ 42.382074] ? sock_has_perm+0x1f6/0x290
[ 42.382614] ? ___sys_sendmsg+0x167/0x930
[ 42.383173] ? lock_downgrade+0x660/0x660
[ 42.383727] inet_sendmsg+0x123/0x500
[ 42.384226] ? inet_sendmsg+0x123/0x500
[ 42.384748] ? inet_recvmsg+0x540/0x540
[ 42.385263] sock_sendmsg+0xca/0x110
[ 42.385758] SYSC_sendto+0x217/0x380
[ 42.386249] ? SYSC_connect+0x310/0x310
[ 42.386783] ? __might_fault+0x110/0x1d0
[ 42.387324] ? lock_downgrade+0x660/0x660
[ 42.387880] ? __fget_light+0xa1/0x1f0
[ 42.388403] ? __fdget+0x18/0x20
[ 42.388851] ? sock_common_setsockopt+0x95/0xd0
[ 42.389472] ? SyS_setsockopt+0x17f/0x260
[ 42.390021] ? entry_SYSCALL_64_fastpath+0x5/0xbe
[ 42.390650] SyS_sendto+0x40/0x50
[ 42.391103] entry_SYSCALL_64_fastpath+0x1f/0xbe
[ 42.391731] RIP: 0033:0x7fbbb711e383
[ 42.392217] RSP: 002b:00007ffff4d34f28 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[ 42.393235] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fbbb711e383
[ 42.394195] RDX: 0000000000001000 RSI: 00007ffff4d34f60 RDI: 0000000000000003
[ 42.395145] RBP: 0000000000000046 R08: 00007ffff4d34f40 R09: 0000000000000018
[ 42.396056] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000400aad
[ 42.396598] R13: 0000000000000066 R14: 00007ffff4d34ee0 R15: 00007fbbb717af00
[ 42.397257]
[ 42.397411] Allocated by task 3789:
[ 42.397702] save_stack_trace+0x16/0x20
[ 42.398005] save_stack+0x46/0xd0
[ 42.398267] kasan_kmalloc+0xad/0xe0
[ 42.398548] kasan_slab_alloc+0x12/0x20
[ 42.398848] __kmalloc_node_track_caller+0xcb/0x380
[ 42.399224] __kmalloc_reserve.isra.32+0x41/0xe0
[ 42.399654] __alloc_skb+0xf8/0x580
[ 42.400003] sock_wmalloc+0xab/0xf0
[ 42.400346] __ip6_append_data.isra.41+0x2472/0x33d0
[ 42.400813] ip6_append_data+0x1a8/0x2f0
[ 42.401122] rawv6_sendmsg+0x11ee/0x2db0
[ 42.401505] inet_sendmsg+0x123/0x500
[ 42.401860] sock_sendmsg+0xca/0x110
[ 42.402209] ___sys_sendmsg+0x7cb/0x930
[ 42.402582] __sys_sendmsg+0xd9/0x190
[ 42.402941] SyS_sendmsg+0x2d/0x50
[ 42.403273] entry_SYSCALL_64_fastpath+0x1f/0xbe
[ 42.403718]
[ 42.403871] Freed by task 1794:
[ 42.404146] save_stack_trace+0x16/0x20
[ 42.404515] save_stack+0x46/0xd0
[ 42.404827] kasan_slab_free+0x72/0xc0
[ 42.405167] kfree+0xe8/0x2b0
[ 42.405462] skb_free_head+0x74/0xb0
[ 42.405806] skb_release_data+0x30e/0x3a0
[ 42.406198] skb_release_all+0x4a/0x60
[ 42.406563] consume_skb+0x113/0x2e0
[ 42.406910] skb_free_datagram+0x1a/0xe0
[ 42.407288] netlink_recvmsg+0x60d/0xe40
[ 42.407667] sock_recvmsg+0xd7/0x110
[ 42.408022] ___sys_recvmsg+0x25c/0x580
[ 42.408395] __sys_recvmsg+0xd6/0x190
[ 42.408753] SyS_recvmsg+0x2d/0x50
[ 42.409086] entry_SYSCALL_64_fastpath+0x1f/0xbe
[ 42.409513]
[ 42.409665] The buggy address belongs to the object at ffff88000969e780
[ 42.409665] which belongs to the cache kmalloc-512 of size 512
[ 42.410846] The buggy address is located 24 bytes inside of
[ 42.410846] 512-byte region [ffff88000969e780, ffff88000969e980)
[ 42.411941] The buggy address belongs to the page:
[ 42.412405] page:ffffea000025a780 count:1 mapcount:0 mapping: (null) index:0x0 compound_mapcount: 0
[ 42.413298] flags: 0x100000000008100(slab|head)
[ 42.413729] raw: 0100000000008100 0000000000000000 0000000000000000 00000001800c000c
[ 42.414387] raw: ffffea00002a9500 0000000900000007 ffff88000c401280 0000000000000000
[ 42.415074] page dumped because: kasan: bad access detected
[ 42.415604]
[ 42.415757] Memory state around the buggy address:
[ 42.416222] ffff88000969e880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 42.416904] ffff88000969e900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 42.417591] >ffff88000969e980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 42.418273] ^
[ 42.418588] ffff88000969ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 42.419273] ffff88000969ea80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 42.419882] ==================================================================
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Craig Gallek <kraig@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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It's a common practice to send gratuitous ARPs after moving an
IP address to another device to speed up healing of a service. To
fulfill service availability constraints, the timing of network peers
updating their caches to point to a new location of an IP address can be
particularly important.
Sometimes neigh_update calls won't touch neither lladdr nor state, for
example if an update arrives in locktime interval. The neigh->updated
value is tested by the protocol specific neigh code, which in turn
will influence whether NEIGH_UPDATE_F_OVERRIDE gets set in the
call to neigh_update() or not. As a result, we may effectively ignore
the update request, bailing out of touching the neigh entry, except that
we still bump its timestamps inside neigh_update.
This may be a problem for updates arriving in quick succession. For
example, consider the following scenario:
A service is moved to another device with its IP address. The new device
sends three gratuitous ARP requests into the network with ~1 seconds
interval between them. Just before the first request arrives to one of
network peer nodes, its neigh entry for the IP address transitions from
STALE to DELAY. This transition, among other things, updates
neigh->updated. Once the kernel receives the first gratuitous ARP, it
ignores it because its arrival time is inside the locktime interval. The
kernel still bumps neigh->updated. Then the second gratuitous ARP
request arrives, and it's also ignored because it's still in the (new)
locktime interval. Same happens for the third request. The node
eventually heals itself (after delay_first_probe_time seconds since the
initial transition to DELAY state), but it just wasted some time and
require a new ARP request/reply round trip. This unfortunate behaviour
both puts more load on the network, as well as reduces service
availability.
This patch changes neigh_update so that it bumps neigh->updated (as well
as neigh->confirmed) only once we are sure that either lladdr or entry
state will change). In the scenario described above, it means that the
second gratuitous ARP request will actually update the entry lladdr.
Ideally, we would update the neigh entry on the very first gratuitous
ARP request. The locktime mechanism is designed to ignore ARP updates in
a short timeframe after a previous ARP update was honoured by the kernel
layer. This would require tracking timestamps for state transitions
separately from timestamps when actual updates are received. This would
probably involve changes in neighbour struct. Therefore, the patch
doesn't tackle the issue of the first gratuitous APR ignored, leaving
it for a follow-up.
Signed-off-by: Ihar Hrachyshka <ihrachys@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When arp_accept is 1, gratuitous ARPs are supposed to override matching
entries irrespective of whether they arrive during locktime. This was
implemented in commit 56022a8fdd87 ("ipv4: arp: update neighbour address
when a gratuitous arp is received and arp_accept is set")
There is a glitch in the patch though. RFC 2002, section 4.6, "ARP,
Proxy ARP, and Gratuitous ARP", defines gratuitous ARPs so that they can
be either of Request or Reply type. Those Reply gratuitous ARPs can be
triggered with standard tooling, for example, arping -A option does just
that.
This patch fixes the glitch, making both Request and Reply flavours of
gratuitous ARPs to behave identically.
As per RFC, if gratuitous ARPs are of Reply type, their Target Hardware
Address field should also be set to the link-layer address to which this
cache entry should be updated. The field is present in ARP over Ethernet
but not in IEEE 1394. In this patch, I don't consider any broadcasted
ARP replies as gratuitous if the field is not present, to conform the
standard. It's not clear whether there is such a thing for IEEE 1394 as
a gratuitous ARP reply; until it's cleared up, we will ignore such
broadcasts. Note that they will still update existing ARP cache entries,
assuming they arrive out of locktime time interval.
Signed-off-by: Ihar Hrachyshka <ihrachys@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We now reference the arp_tbl, which requires IPv4 support to be
enabled in the kernel, otherwise we get a link error:
drivers/net/built-in.o: In function `mlx5e_tc_update_neigh_used_value':
(.text+0x16afec): undefined reference to `arp_tbl'
drivers/net/built-in.o: In function `mlx5e_rep_neigh_init':
en_rep.c:(.text+0x16c16d): undefined reference to `arp_tbl'
drivers/net/built-in.o: In function `mlx5e_rep_netevent_event':
en_rep.c:(.text+0x16cbb5): undefined reference to `arp_tbl'
This adds a Kconfig dependency for it.
Fixes: 232c001398ae ("net/mlx5e: Add support to neighbour update flow")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In general, rtnetlink dumps do not anticipate failure to dump a single
object (e.g., link or route) on a single pass. As both route and link
objects have grown via more attributes, that is no longer a given.
netlink dumps can handle a failure if the dump function returns an
error; specifically, netlink_dump adds the return code to the response
if it is <= 0 so userspace is notified of the failure. The missing
piece is the rtnetlink dump functions returning the error.
Fix route and link dump functions to return the errors if no object is
added to an skb (detected by skb->len != 0). IPv6 route dumps
(rt6_dump_route) already return the error; this patch updates IPv4 and
link dumps. Other dump functions may need to be ajusted as well.
Reported-by: Jan Moskyto Matejka <mq@ucw.cz>
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The driver explicitly bypasses APIs to register all memory once a
connection is made, and thus allows remote access to memory.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Acked-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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