| Commit message (Collapse) | Author | Age | Files | Lines |
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We only ever put one skb on the send queue, and then immediately
send it. Remove the queue and call dev_queue_xmit() directly.
This leaves struct llc_station empty, so remove that as well.
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We only ever put one skb on the event queue, and then immediately
process it. Remove the queue and fold together the related functions,
removing several blatantly false comments.
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The initial state is UP and there is no way to enter the other states
as the required event type is never generated. Delete all states,
event types, and other dead code. The only thing left is handling
of the XID and TEST commands.
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next
John W. Linville says:
====================
This is another batch of updates intended for the 3.7 stream.
There are not a lot of large items, but iwlwifi, mwifiex, rt2x00,
ath9k, and brcmfmac all get some attention. Wei Yongjun also provides
a series of small maintenance fixes.
This also includes a pull of the wireless tree in order to satisfy
some prerequisites for later patches.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem
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git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless
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git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next
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checkpatch pointed out an issue, fix it.
Signed-off-by: Hila Gonen <hila.gonen@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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The wext code checks is the event data is within size limits.
When this check fails a message is logged with violating size.
This patch adds the event id to put us on the right track for
resolving that violation.
Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Doing so creates warnings, but the function is internal and
not part of the 802.11 docbooks, so it from kerneldoc.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Using list_move_tail() instead of list_del() + list_add_tail().
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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A P2P Device interface does not have a netdev, and is not
expected to be used for transmitting data, so there is no
need to assign hw queues for it.
Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Conflicts:
net/netfilter/nfnetlink_log.c
net/netfilter/xt_LOG.c
Rather easy conflict resolution, the 'net' tree had bug fixes to make
sure we checked if a socket is a time-wait one or not and elide the
logging code if so.
Whereas on the 'net-next' side we are calculating the UID and GID from
the creds using different interfaces due to the user namespace changes
from Eric Biederman.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pull networking fixes from David Miller:
1) Use after free and new device IDs in bluetooth from Andre Guedes,
Yevgeniy Melnichuk, Gustavo Padovan, and Henrik Rydberg.
2) Fix crashes with short packet lengths and VLAN in pktgen, from
Nishank Trivedi.
3) mISDN calls flush_work_sync() with locks held, fix from Karsten
Keil.
4) Packet scheduler gred parameters are reported to userspace
improperly scaled, and WRED idling is not performed correctly. All
from David Ward.
5) Fix TCP socket refcount problem in ipv6, from Julian Anastasov.
6) ibmveth device has RX queue alignment requirements which are not
being explicitly met resulting in sporadic failures, fix from
Santiago Leon.
7) Netfilter needs to take care when interpreting sockets attached to
socket buffers, they could be time-wait minisockets. Fix from Eric
Dumazet.
8) sock_edemux() has the same issue as netfilter did in #7 above, fix
from Eric Dumazet.
9) Avoid infinite loops in CBQ scheduler with some configurations, from
Eric Dumazet.
10) Deal with "Reflection scan: an Off-Path Attack on TCP", from Jozsef
Kadlecsik.
11) SCTP overcharges socket for TX packets, fix from Thomas Graf.
12) CODEL packet scheduler should not reset it's state every time it
builds a new flow, fix from Eric Dumazet.
13) Fix memory leak in nl80211, from Wei Yongjun.
14) NETROM doesn't check skb_copy_datagram_iovec() return values, from
Alan Cox.
15) l2tp ethernet was using sizeof(ETH_HLEN) instead of plain ETH_HLEN,
oops. From Eric Dumazet.
16) Fix selection of ath9k chips on which PA linearization and AM2PM
predistoration are used, from Felix Fietkau.
17) Flow steering settings in mlx4 driver need to be validated properly,
from Hadar Hen Zion.
18) bnx2x doesn't show the correct link duplex setting, from Yaniv
Rosner.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (75 commits)
pktgen: fix crash with vlan and packet size less than 46
bnx2x: Add missing afex code
bnx2x: fix registers dumped
bnx2x: correct advertisement of pause capabilities
bnx2x: display the correct duplex value
bnx2x: prevent timeouts when using PFC
bnx2x: fix stats copying logic
bnx2x: Avoid sending multiple statistics queries
net: qmi_wwan: call subdriver with control intf only
net_sched: gred: actually perform idling in WRED mode
net_sched: gred: fix qave reporting via netlink
net_sched: gred: eliminate redundant DP prio comparisons
net_sched: gred: correct comment about qavg calculation in RIO mode
mISDN: Fix wrong usage of flush_work_sync while holding locks
netfilter: log: Fix log-level processing
net-sched: sch_cbq: avoid infinite loop
net: qmi_wwan: fix Gobi device probing for un2430
net: fix net/core/sock.c build error
ixp4xx_hss: fix build failure due to missing linux/module.h inclusion
caif: move the dereference below the NULL test
...
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If vlan option is being specified in the pktgen and packet size
being requested is less than 46 bytes, despite being illogical
request, pktgen should not crash the kernel.
BUG: unable to handle kernel paging request at ffff88021fb82000
Process kpktgend_0 (pid: 1184, threadinfo ffff880215f1a000, task ffff880218544530)
Call Trace:
[<ffffffffa0637cd2>] ? pktgen_finalize_skb+0x222/0x300 [pktgen]
[<ffffffff814f0084>] ? build_skb+0x34/0x1c0
[<ffffffffa0639b11>] pktgen_thread_worker+0x5d1/0x1790 [pktgen]
[<ffffffffa03ffb10>] ? igb_xmit_frame_ring+0xa30/0xa30 [igb]
[<ffffffff8107ba20>] ? wake_up_bit+0x40/0x40
[<ffffffff8107ba20>] ? wake_up_bit+0x40/0x40
[<ffffffffa0639540>] ? spin+0x240/0x240 [pktgen]
[<ffffffff8107b4e3>] kthread+0x93/0xa0
[<ffffffff81615de4>] kernel_thread_helper+0x4/0x10
[<ffffffff8107b450>] ? flush_kthread_worker+0x80/0x80
[<ffffffff81615de0>] ? gs_change+0x13/0x13
The root cause of why pktgen is not able to handle this case is due
to comparison of signed (datalen) and unsigned data (sizeof), which
eventually passes a huge number to skb_put().
Signed-off-by: Nishank Trivedi <nistrive@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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gred_dequeue() and gred_drop() do not seem to get called when the
queue is empty, meaning that we never start idling while in WRED
mode. And since qidlestart is not stored by gred_store_wred_set(),
we would never stop idling while in WRED mode if we ever started.
This messes up the average queue size calculation that influences
packet marking/dropping behavior.
Now, we start WRED mode idling as we are removing the last packet
from the queue. Also we now actually stop WRED mode idling when we
are enqueuing a packet.
Cc: Bruce Osler <brosler@cisco.com>
Signed-off-by: David Ward <david.ward@ll.mit.edu>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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q->vars.qavg is a Wlog scaled value, but q->backlog is not. In order
to pass q->vars.qavg as the backlog value, we need to un-scale it.
Additionally, the qave value returned via netlink should not be Wlog
scaled, so we need to un-scale the result of red_calc_qavg().
This caused artificially high values for "Average Queue" to be shown
by 'tc -s -d qdisc', but did not affect the actual operation of GRED.
Signed-off-by: David Ward <david.ward@ll.mit.edu>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Each pair of DPs only needs to be compared once when searching for
a non-unique prio value.
Signed-off-by: David Ward <david.ward@ll.mit.edu>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: David Ward <david.ward@ll.mit.edu>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pablo Neira Ayuso say:
====================
The following patchset contains four updates for your net tree, they are:
* Fix crash on timewait sockets, since the TCP early demux was added,
in nfnetlink_log, from Eric Dumazet.
* Fix broken syslog log-level for xt_LOG and ebt_log since printk format was
converted from <.> to a 2 bytes pattern using ASCII SOH, from Joe Perches.
* Two security fixes for the TCP connection tracking targeting off-path attacks,
from Jozsef Kadlecsik. The problem was discovered by Jan Wrobel and it is
documented in: http://mixedbit.org/reflection_scan/reflection_scan.pdf.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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auto75914331@hushmail.com reports that iptables does not correctly
output the KERN_<level>.
$IPTABLES -A RULE_0_in -j LOG --log-level notice --log-prefix "DENY in: "
result with linux 3.6-rc5
Sep 12 06:37:29 xxxxx kernel: <5>DENY in: IN=eth0 OUT= MAC=.......
result with linux 3.5.3 and older:
Sep 9 10:43:01 xxxxx kernel: DENY in: IN=eth0 OUT= MAC......
commit 04d2c8c83d0
("printk: convert the format for KERN_<LEVEL> to a 2 byte pattern")
updated the syslog header style but did not update netfilter uses.
Do so.
Use KERN_SOH and string concatenation instead of "%c" KERN_SOH_ASCII
as suggested by Eric Dumazet.
Signed-off-by: Joe Perches <joe@perches.com>
cc: auto75914331@hushmail.com
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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We spare nothing by not validating the sequence number of dataless
ACK packets and enabling it makes harder off-path attacks.
See: "Reflection scan: an Off-Path Attack on TCP" by Jan Wrobel,
http://arxiv.org/abs/1201.2074
Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Clients should not send such packets. By accepting them, we open
up a hole by wich ephemeral ports can be discovered in an off-path
attack.
See: "Reflection scan: an Off-Path Attack on TCP" by Jan Wrobel,
http://arxiv.org/abs/1201.2074
Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Sami Farin reported crashes in xt_LOG because it assumes skb->sk is a
full blown socket.
Since (41063e9 ipv4: Early TCP socket demux), we can have skb->sk
pointing to a timewait socket.
Same fix is needed in nfnetlink_log.
Diagnosed-by: Florian Westphal <fw@strlen.de>
Reported-by: Sami Farin <hvtaifwkbgefbaei@gmail.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Its possible to setup a bad cbq configuration leading to
an infinite loop in cbq_classify()
DEV_OUT=eth0
ICMP="match ip protocol 1 0xff"
U32="protocol ip u32"
DST="match ip dst"
tc qdisc add dev $DEV_OUT root handle 1: cbq avpkt 1000 \
bandwidth 100mbit
tc class add dev $DEV_OUT parent 1: classid 1:1 cbq \
rate 512kbit allot 1500 prio 5 bounded isolated
tc filter add dev $DEV_OUT parent 1: prio 3 $U32 \
$ICMP $DST 192.168.3.234 flowid 1:
Reported-by: Denys Fedoryschenko <denys@visp.net.lb>
Tested-by: Denys Fedoryschenko <denys@visp.net.lb>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix net/core/sock.c build error when CONFIG_INET is not enabled:
net/built-in.o: In function `sock_edemux':
(.text+0xd396): undefined reference to `inet_twsk_put'
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The dereference should be moved below the NULL test.
spatch with a semantic match is used to found this.
(http://coccinelle.lip6.fr/)
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In the current rxhash calculation function, while the
sorting of the ports/addrs is coherent (you get the
same rxhash for packets sharing the same 4-tuple, in
both directions), ports and addrs are sorted
independently. This implies packets from a connection
between the same addresses but crossed ports hash to
the same rxhash.
For example, traffic between A=S:l and B=L:s is hashed
(in both directions) from {L, S, {s, l}}. The same
rxhash is obtained for packets between C=S:s and D=L:l.
This patch ensures that you either swap both addrs and ports,
or you swap none. Traffic between A and B, and traffic
between C and D, get their rxhash from different sources
({L, S, {l, s}} for A<->B, and {L, S, {s, l}} for C<->D)
The patch is co-written with Eric Dumazet <edumazet@google.com>
Signed-off-by: Chema Gonzalez <chema@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless into for-davem
John W. Linville says:
====================
Please pull these fixes intended for 3.6. There are more commits
here than I would like -- I got a bit behind while I was stalking
Steven Rostedt in San Diego last week... I'll slow it down after this!
There are a couple of pulls here. One is from Johannes:
"Please pull (according to the below information) to get a few fixes.
* a fix to properly disconnect in the driver when authentication or
association fails
* a fix to prevent invalid information about mesh paths being reported
to userspace
* a memory leak fix in an nl80211 error path"
The other comes via Gustavo:
"A few updates for the 3.6 kernel. There are two btusb patches to add
more supported devices through the new USB_VENDOR_AND_INTEFACE_INFO()
macro and another one that add a new device id for a Sony Vaio laptop,
one fix for a user-after-free and, finally, two patches from Vinicius
to fix a issue in SMP pairing."
Along with those...
Arend van Spriel provides a fix for a use-after-free bug in brcmfmac.
Daniel Drake avoids a hang by not trying to touch the libertas hardware
duing suspend if it is already powered-down.
Felix Fietkau provides a batch of ath9k fixes that adress some
potential problems with power settings, as well as a fix to avoid a
potential interrupt storm.
Gertjan van Wingerde provides a register-width fix for rt2x00, and
a rt2x00 fix to prevent incorrectly detecting the rfkill status.
He also provides a device ID patch.
Hante Meuleman gives us three brcmfmac fixes, one that properly
initializes a command structure, one that fixes a race condition that
could lose usb requests, and one that removes some log spam.
Marc Kleine-Budde offers an rt2x00 fix for a voltage setting on some
specific devices.
Mohammed Shafi Shajakhan sent an ath9k fix to avoid a crash related to
using timers that aren't allocated when 2 wire bluetooth coexistence
hardware is in use.
Sergei Poselenov changes rt2800usb to do some validity checking for
received packets, avoiding crashes on an ARM Soc.
Stone Piao gives us an mwifiex fix for an incorrectly set skb length
value for a command buffer.
All of these are localized to their specific drivers, and relatively
small. The power-related patches from Felix are bigger than I would
like, but I merged them in consideration of their isolation to ath9k
and the sensitive nature of power settings in wireless devices.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211
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Various small fixes for net/mac80211/cfg.c:mpath_set_pinfo():
Initialize *pinfo before filling members in, handle MESH_PATH_RESOLVED
correctly, and remove bogus assignment; result in correct display
of FLAGS values and meaningful EXPTIME for expired paths in iw utility.
Signed-off-by: Yoichi Shinoda <shinoda@jaist.ac.jp>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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connkeys is malloced in nl80211_parse_connkeys() and should
be freed in the error handling case, otherwise it will cause
memory leak.
spatch with a semantic match is used to found this problem.
(http://coccinelle.lip6.fr/)
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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ifmgd->bssid wasn't cleared properly in some
auth/assoc failure cases, causing mac80211 and
the low-level driver to go out of sync.
Clear ifmgd->bssid on failure, and notify the driver.
Cc: stable@kernel.org # 3.4+
Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth
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In the case that the link is already in the connected state and a
Pairing request arrives from the mgmt interface, hci_conn_security()
would be called but it was not considering LE links.
Reported-by: João Paulo Rechi Vita <jprvita@openbossa.org>
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
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To make it clear that it may be called from contexts that may not have
any knowledge of L2CAP, we change the connection parameter, to receive
a hci_conn.
This also makes it clear that it is checking the security of the link.
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
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If SMP fails, we should always cancel security_timer delayed work.
Otherwise, security_timer function may run after l2cap_conn object
has been freed.
This patch fixes the following warning reported by ODEBUG:
WARNING: at lib/debugobjects.c:261 debug_print_object+0x7c/0x8d()
Hardware name: Bochs
ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x27
Modules linked in: btusb bluetooth
Pid: 440, comm: kworker/u:2 Not tainted 3.5.0-rc1+ #4
Call Trace:
[<ffffffff81174600>] ? free_obj_work+0x4a/0x7f
[<ffffffff81023eb8>] warn_slowpath_common+0x7e/0x97
[<ffffffff81023f65>] warn_slowpath_fmt+0x41/0x43
[<ffffffff811746b1>] debug_print_object+0x7c/0x8d
[<ffffffff810394f0>] ? __queue_work+0x241/0x241
[<ffffffff81174fdd>] debug_check_no_obj_freed+0x92/0x159
[<ffffffff810ac08e>] slab_free_hook+0x6f/0x77
[<ffffffffa0019145>] ? l2cap_conn_del+0x148/0x157 [bluetooth]
[<ffffffff810ae408>] kfree+0x59/0xac
[<ffffffffa0019145>] l2cap_conn_del+0x148/0x157 [bluetooth]
[<ffffffffa001b9a2>] l2cap_recv_frame+0xa77/0xfa4 [bluetooth]
[<ffffffff810592f9>] ? trace_hardirqs_on_caller+0x112/0x1ad
[<ffffffffa001c86c>] l2cap_recv_acldata+0xe2/0x264 [bluetooth]
[<ffffffffa0002b2f>] hci_rx_work+0x235/0x33c [bluetooth]
[<ffffffff81038dc3>] ? process_one_work+0x126/0x2fe
[<ffffffff81038e22>] process_one_work+0x185/0x2fe
[<ffffffff81038dc3>] ? process_one_work+0x126/0x2fe
[<ffffffff81059f2e>] ? lock_acquired+0x1b5/0x1cf
[<ffffffffa00028fa>] ? le_scan_work+0x11d/0x11d [bluetooth]
[<ffffffff81036fb6>] ? spin_lock_irq+0x9/0xb
[<ffffffff81039209>] worker_thread+0xcf/0x175
[<ffffffff8103913a>] ? rescuer_thread+0x175/0x175
[<ffffffff8103cfe0>] kthread+0x95/0x9d
[<ffffffff812c5054>] kernel_threadi_helper+0x4/0x10
[<ffffffff812c36b0>] ? retint_restore_args+0x13/0x13
[<ffffffff8103cf4b>] ? flush_kthread_worker+0xdb/0xdb
[<ffffffff812c5050>] ? gs_change+0x13/0x13
This bug can be reproduced using hctool lecc or l2test tools and
bluetoothd not running.
Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
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In UDP recvmsg(), we miss an increase of UDP_MIB_INERRORS if the copy
of skb to userspace failed for whatever reason.
Reported-by: Shawn Bohrer <sbohrer@rgmadvisors.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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commit 144d56e91044181ec0ef67aeca91e9a8b5718348
("tcp: fix possible socket refcount problem") is missing
the IPv6 part. As tcp_release_cb is shared by both protocols
we should hold sock reference for the TCP_MTU_REDUCED_DEFERRED
bit.
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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While investigating l2tp bug, I hit a bug in eth_type_trans(),
because not enough bytes were pulled in skb head.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/jesse/openvswitch
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The vlan encapsulation fields in the maximum flow defintion were
never updated when the representation changed before upstreaming.
In theory this could cause a kernel panic when a maximum length
flow is used. In practice this has never happened (to my knowledge)
because skb allocations are padded out to a cache line so you would
need the right combination of flow and packet being sent to userspace.
Signed-off-by: Jesse Gross <jesse@nicira.com>
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Signed-off-by: Joe Stringer <joe@wand.net.nz>
Signed-off-by: Jesse Gross <jesse@nicira.com>
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When installing a flow with an action to set a particular field we
need to validate that the packets that are part of the flow actually
contain that header. With IP we use zeroed addresses and with TCP/UDP
the check is for zeroed ports. This check is overly broad and can catch
packets like DHCP requests that have a zero source address in a
legitimate header. This changes the check to look for a zeroed protocol
number for IP or for both ports be zero for TCP/UDP before considering
the header to not exist.
Reported-by: Ethan Jackson <ethan@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
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ESN for esp is defined in RFC 4303. This RFC assumes that the
sequence number counters are always up to date. However,
this is not true if an async crypto algorithm is employed.
If the sequence number counters are not up to date on sequence
number check, we may incorrectly update the upper 32 bit of
the sequence number. This leads to a DOS.
We workaround this by comparing the upper sequence number,
(used for authentication) with the upper sequence number
computed after the async processing. We drop the packet
if these numbers are different.
To do this, we introduce a recheck function that does this
check in the ESN case.
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fixes following lockdep splat :
[ 1614.734896] =============================================
[ 1614.734898] [ INFO: possible recursive locking detected ]
[ 1614.734901] 3.6.0-rc3+ #782 Not tainted
[ 1614.734903] ---------------------------------------------
[ 1614.734905] swapper/11/0 is trying to acquire lock:
[ 1614.734907] (slock-AF_INET){+.-...}, at: [<ffffffffa0209d72>] l2tp_xmit_skb+0x172/0xa50 [l2tp_core]
[ 1614.734920]
[ 1614.734920] but task is already holding lock:
[ 1614.734922] (slock-AF_INET){+.-...}, at: [<ffffffff815fce23>] tcp_v4_err+0x163/0x6b0
[ 1614.734932]
[ 1614.734932] other info that might help us debug this:
[ 1614.734935] Possible unsafe locking scenario:
[ 1614.734935]
[ 1614.734937] CPU0
[ 1614.734938] ----
[ 1614.734940] lock(slock-AF_INET);
[ 1614.734943] lock(slock-AF_INET);
[ 1614.734946]
[ 1614.734946] *** DEADLOCK ***
[ 1614.734946]
[ 1614.734949] May be due to missing lock nesting notation
[ 1614.734949]
[ 1614.734952] 7 locks held by swapper/11/0:
[ 1614.734954] #0: (rcu_read_lock){.+.+..}, at: [<ffffffff81592801>] __netif_receive_skb+0x251/0xd00
[ 1614.734964] #1: (rcu_read_lock){.+.+..}, at: [<ffffffff815d319c>] ip_local_deliver_finish+0x4c/0x4e0
[ 1614.734972] #2: (rcu_read_lock){.+.+..}, at: [<ffffffff8160d116>] icmp_socket_deliver+0x46/0x230
[ 1614.734982] #3: (slock-AF_INET){+.-...}, at: [<ffffffff815fce23>] tcp_v4_err+0x163/0x6b0
[ 1614.734989] #4: (rcu_read_lock){.+.+..}, at: [<ffffffff815da240>] ip_queue_xmit+0x0/0x680
[ 1614.734997] #5: (rcu_read_lock_bh){.+....}, at: [<ffffffff815d9925>] ip_finish_output+0x135/0x890
[ 1614.735004] #6: (rcu_read_lock_bh){.+....}, at: [<ffffffff81595680>] dev_queue_xmit+0x0/0xe00
[ 1614.735012]
[ 1614.735012] stack backtrace:
[ 1614.735016] Pid: 0, comm: swapper/11 Not tainted 3.6.0-rc3+ #782
[ 1614.735018] Call Trace:
[ 1614.735020] <IRQ> [<ffffffff810a50ac>] __lock_acquire+0x144c/0x1b10
[ 1614.735033] [<ffffffff810a334b>] ? check_usage+0x9b/0x4d0
[ 1614.735037] [<ffffffff810a6762>] ? mark_held_locks+0x82/0x130
[ 1614.735042] [<ffffffff810a5df0>] lock_acquire+0x90/0x200
[ 1614.735047] [<ffffffffa0209d72>] ? l2tp_xmit_skb+0x172/0xa50 [l2tp_core]
[ 1614.735051] [<ffffffff810a69ad>] ? trace_hardirqs_on+0xd/0x10
[ 1614.735060] [<ffffffff81749b31>] _raw_spin_lock+0x41/0x50
[ 1614.735065] [<ffffffffa0209d72>] ? l2tp_xmit_skb+0x172/0xa50 [l2tp_core]
[ 1614.735069] [<ffffffffa0209d72>] l2tp_xmit_skb+0x172/0xa50 [l2tp_core]
[ 1614.735075] [<ffffffffa014f7f2>] l2tp_eth_dev_xmit+0x32/0x60 [l2tp_eth]
[ 1614.735079] [<ffffffff81595112>] dev_hard_start_xmit+0x502/0xa70
[ 1614.735083] [<ffffffff81594c6e>] ? dev_hard_start_xmit+0x5e/0xa70
[ 1614.735087] [<ffffffff815957c1>] ? dev_queue_xmit+0x141/0xe00
[ 1614.735093] [<ffffffff815b622e>] sch_direct_xmit+0xfe/0x290
[ 1614.735098] [<ffffffff81595865>] dev_queue_xmit+0x1e5/0xe00
[ 1614.735102] [<ffffffff81595680>] ? dev_hard_start_xmit+0xa70/0xa70
[ 1614.735106] [<ffffffff815b4daa>] ? eth_header+0x3a/0xf0
[ 1614.735111] [<ffffffff8161d33e>] ? fib_get_table+0x2e/0x280
[ 1614.735117] [<ffffffff8160a7e2>] arp_xmit+0x22/0x60
[ 1614.735121] [<ffffffff8160a863>] arp_send+0x43/0x50
[ 1614.735125] [<ffffffff8160b82f>] arp_solicit+0x18f/0x450
[ 1614.735132] [<ffffffff8159d9da>] neigh_probe+0x4a/0x70
[ 1614.735137] [<ffffffff815a191a>] __neigh_event_send+0xea/0x300
[ 1614.735141] [<ffffffff815a1c93>] neigh_resolve_output+0x163/0x260
[ 1614.735146] [<ffffffff815d9cf5>] ip_finish_output+0x505/0x890
[ 1614.735150] [<ffffffff815d9925>] ? ip_finish_output+0x135/0x890
[ 1614.735154] [<ffffffff815dae79>] ip_output+0x59/0xf0
[ 1614.735158] [<ffffffff815da1cd>] ip_local_out+0x2d/0xa0
[ 1614.735162] [<ffffffff815da403>] ip_queue_xmit+0x1c3/0x680
[ 1614.735165] [<ffffffff815da240>] ? ip_local_out+0xa0/0xa0
[ 1614.735172] [<ffffffff815f4402>] tcp_transmit_skb+0x402/0xa60
[ 1614.735177] [<ffffffff815f5a11>] tcp_retransmit_skb+0x1a1/0x620
[ 1614.735181] [<ffffffff815f7e93>] tcp_retransmit_timer+0x393/0x960
[ 1614.735185] [<ffffffff815fce23>] ? tcp_v4_err+0x163/0x6b0
[ 1614.735189] [<ffffffff815fd317>] tcp_v4_err+0x657/0x6b0
[ 1614.735194] [<ffffffff8160d116>] ? icmp_socket_deliver+0x46/0x230
[ 1614.735199] [<ffffffff8160d19e>] icmp_socket_deliver+0xce/0x230
[ 1614.735203] [<ffffffff8160d116>] ? icmp_socket_deliver+0x46/0x230
[ 1614.735208] [<ffffffff8160d464>] icmp_unreach+0xe4/0x2c0
[ 1614.735213] [<ffffffff8160e520>] icmp_rcv+0x350/0x4a0
[ 1614.735217] [<ffffffff815d3285>] ip_local_deliver_finish+0x135/0x4e0
[ 1614.735221] [<ffffffff815d319c>] ? ip_local_deliver_finish+0x4c/0x4e0
[ 1614.735225] [<ffffffff815d3ffa>] ip_local_deliver+0x4a/0x90
[ 1614.735229] [<ffffffff815d37b7>] ip_rcv_finish+0x187/0x730
[ 1614.735233] [<ffffffff815d425d>] ip_rcv+0x21d/0x300
[ 1614.735237] [<ffffffff81592a1b>] __netif_receive_skb+0x46b/0xd00
[ 1614.735241] [<ffffffff81592801>] ? __netif_receive_skb+0x251/0xd00
[ 1614.735245] [<ffffffff81593368>] process_backlog+0xb8/0x180
[ 1614.735249] [<ffffffff81593cf9>] net_rx_action+0x159/0x330
[ 1614.735257] [<ffffffff810491f0>] __do_softirq+0xd0/0x3e0
[ 1614.735264] [<ffffffff8109ed24>] ? tick_program_event+0x24/0x30
[ 1614.735270] [<ffffffff8175419c>] call_softirq+0x1c/0x30
[ 1614.735278] [<ffffffff8100425d>] do_softirq+0x8d/0xc0
[ 1614.735282] [<ffffffff8104983e>] irq_exit+0xae/0xe0
[ 1614.735287] [<ffffffff8175494e>] smp_apic_timer_interrupt+0x6e/0x99
[ 1614.735291] [<ffffffff81753a1c>] apic_timer_interrupt+0x6c/0x80
[ 1614.735293] <EOI> [<ffffffff810a14ad>] ? trace_hardirqs_off+0xd/0x10
[ 1614.735306] [<ffffffff81336f85>] ? intel_idle+0xf5/0x150
[ 1614.735310] [<ffffffff81336f7e>] ? intel_idle+0xee/0x150
[ 1614.735317] [<ffffffff814e6ea9>] cpuidle_enter+0x19/0x20
[ 1614.735321] [<ffffffff814e7538>] cpuidle_idle_call+0xa8/0x630
[ 1614.735327] [<ffffffff8100c1ba>] cpu_idle+0x8a/0xe0
[ 1614.735333] [<ffffffff8173762e>] start_secondary+0x220/0x222
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Check for an error from this and if so bail properly.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When fq_codel builds a new flow, it should not reset codel state.
Codel algo needs to get previous values (lastcount, drop_next) to get
proper behavior.
Signed-off-by: Dave Taht <dave.taht@gmail.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Dave Taht <dave.taht@bufferbloat.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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