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' into integration-android-ux500
Signed-off-by: Philippe Langlais <philippe.langlais@stericsson.com>
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With this patch it is possible to retrieve sec_level from the kernel by
user space. This is needed for SAP working on hciops.
This patch missed to be added when moving to kernel 3.0
ST-Ericsson ID: 256270
ST-Ericsson FOSS-OUT ID: FOSS-OUT-10060
Change-Id: Ic569db392e6f6ee2e546003dec86cc2d62a1fcd7
Signed-off-by: Lukasz Rymanowski <lukasz.rymanowski@tieto.com>
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/42169
Reviewed-by: Lukasz RYMANOWSKI <lukasz.rymanowski@stericsson.com>
Tested-by: Lukasz RYMANOWSKI <lukasz.rymanowski@stericsson.com>
Reviewed-by: Hakan GARDRUP <hakan.gardrup@stericsson.com>
Reviewed-by: Henrik POSSUNG <henrik.possung@stericsson.com>
Reviewed-by: Kanak GUPTA <kanak.gupta@stericsson.com>
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Adds ability to setup SCO connection parameters through socket option.
ST-Ericsson Linux next: Not tested, ER 256277
ST-Ericsson ID: 256277
ST-Ericsson FOSS-OUT ID: STETL-FOSS-OUT-10137
Change-Id: If859341019fd9f7cc7c0efe95750779e84fac801
Signed-off-by: Andrzej Kaczmarek <andrzej.kaczmarek@tieto.com>
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/30136
Reviewed-by: Par-Gunnar HJALMDAHL <par-gunnar.p.hjalmdahl@stericsson.com>
Tested-by: Par-Gunnar HJALMDAHL <par-gunnar.p.hjalmdahl@stericsson.com>
Reviewed-by: Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com>
Signed-off-by: Robert Marklund <robert.marklund@stericsson.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless into for-davem
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It fixes L2CAP socket based security level elevation during a
connection. The HID profile needs this (for keyboards) and it is the only
way to achieve the security level elevation when using the management
interface to talk to the kernel (hence the management enabling patch
being the one that exposes this issue).
It enables the userspace a security level change when the socket is
already connected and create a way to notify the socket the result of the
request. At the moment of the request the socket is made non writable, if
the request fails the connections closes, otherwise the socket is made
writable again, POLL_OUT is emmited.
Signed-off-by: Gustavo Padovan <gustavo@padovan.org>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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dst_check() will take care of SA (and obsolete field), hence
IPsec rekeying scenario is taken into account.
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Vlad Yaseivch <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Conflicts:
arch/arm/mm/cache-l2x0.c
arch/arm/mm/mmu.c
Change-Id: If4f371a21c052fa597d107c44b128a093e4a8b91
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git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless into for-davem
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Denys Fedoryshchenko reported frequent crashes on a proxy server and kindly
provided a lockdep report that explains it all :
[ 762.903868]
[ 762.903880] =================================
[ 762.903890] [ INFO: inconsistent lock state ]
[ 762.903903] 3.3.4-build-0061 #8 Not tainted
[ 762.904133] ---------------------------------
[ 762.904344] inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage.
[ 762.904542] squid/1603 [HC0[0]:SC0[0]:HE1:SE1] takes:
[ 762.904542] (key#3){+.?...}, at: [<c0232cc4>]
__percpu_counter_sum+0xd/0x58
[ 762.904542] {IN-SOFTIRQ-W} state was registered at:
[ 762.904542] [<c0158b84>] __lock_acquire+0x284/0xc26
[ 762.904542] [<c01598e8>] lock_acquire+0x71/0x85
[ 762.904542] [<c0349765>] _raw_spin_lock+0x33/0x40
[ 762.904542] [<c0232c93>] __percpu_counter_add+0x58/0x7c
[ 762.904542] [<c02cfde1>] sk_clone_lock+0x1e5/0x200
[ 762.904542] [<c0303ee4>] inet_csk_clone_lock+0xe/0x78
[ 762.904542] [<c0315778>] tcp_create_openreq_child+0x1b/0x404
[ 762.904542] [<c031339c>] tcp_v4_syn_recv_sock+0x32/0x1c1
[ 762.904542] [<c031615a>] tcp_check_req+0x1fd/0x2d7
[ 762.904542] [<c0313f77>] tcp_v4_do_rcv+0xab/0x194
[ 762.904542] [<c03153bb>] tcp_v4_rcv+0x3b3/0x5cc
[ 762.904542] [<c02fc0c4>] ip_local_deliver_finish+0x13a/0x1e9
[ 762.904542] [<c02fc539>] NF_HOOK.clone.11+0x46/0x4d
[ 762.904542] [<c02fc652>] ip_local_deliver+0x41/0x45
[ 762.904542] [<c02fc4d1>] ip_rcv_finish+0x31a/0x33c
[ 762.904542] [<c02fc539>] NF_HOOK.clone.11+0x46/0x4d
[ 762.904542] [<c02fc857>] ip_rcv+0x201/0x23e
[ 762.904542] [<c02daa3a>] __netif_receive_skb+0x319/0x368
[ 762.904542] [<c02dac07>] netif_receive_skb+0x4e/0x7d
[ 762.904542] [<c02dacf6>] napi_skb_finish+0x1e/0x34
[ 762.904542] [<c02db122>] napi_gro_receive+0x20/0x24
[ 762.904542] [<f85d1743>] e1000_receive_skb+0x3f/0x45 [e1000e]
[ 762.904542] [<f85d3464>] e1000_clean_rx_irq+0x1f9/0x284 [e1000e]
[ 762.904542] [<f85d3926>] e1000_clean+0x62/0x1f4 [e1000e]
[ 762.904542] [<c02db228>] net_rx_action+0x90/0x160
[ 762.904542] [<c012a445>] __do_softirq+0x7b/0x118
[ 762.904542] irq event stamp: 156915469
[ 762.904542] hardirqs last enabled at (156915469): [<c019b4f4>]
__slab_alloc.clone.58.clone.63+0xc4/0x2de
[ 762.904542] hardirqs last disabled at (156915468): [<c019b452>]
__slab_alloc.clone.58.clone.63+0x22/0x2de
[ 762.904542] softirqs last enabled at (156915466): [<c02ce677>]
lock_sock_nested+0x64/0x6c
[ 762.904542] softirqs last disabled at (156915464): [<c0349914>]
_raw_spin_lock_bh+0xe/0x45
[ 762.904542]
[ 762.904542] other info that might help us debug this:
[ 762.904542] Possible unsafe locking scenario:
[ 762.904542]
[ 762.904542] CPU0
[ 762.904542] ----
[ 762.904542] lock(key#3);
[ 762.904542] <Interrupt>
[ 762.904542] lock(key#3);
[ 762.904542]
[ 762.904542] *** DEADLOCK ***
[ 762.904542]
[ 762.904542] 1 lock held by squid/1603:
[ 762.904542] #0: (sk_lock-AF_INET){+.+.+.}, at: [<c03055c0>]
lock_sock+0xa/0xc
[ 762.904542]
[ 762.904542] stack backtrace:
[ 762.904542] Pid: 1603, comm: squid Not tainted 3.3.4-build-0061 #8
[ 762.904542] Call Trace:
[ 762.904542] [<c0347b73>] ? printk+0x18/0x1d
[ 762.904542] [<c015873a>] valid_state+0x1f6/0x201
[ 762.904542] [<c0158816>] mark_lock+0xd1/0x1bb
[ 762.904542] [<c015876b>] ? mark_lock+0x26/0x1bb
[ 762.904542] [<c015805d>] ? check_usage_forwards+0x77/0x77
[ 762.904542] [<c0158bf8>] __lock_acquire+0x2f8/0xc26
[ 762.904542] [<c0159b8e>] ? mark_held_locks+0x5d/0x7b
[ 762.904542] [<c0159cf6>] ? trace_hardirqs_on+0xb/0xd
[ 762.904542] [<c0158dd4>] ? __lock_acquire+0x4d4/0xc26
[ 762.904542] [<c01598e8>] lock_acquire+0x71/0x85
[ 762.904542] [<c0232cc4>] ? __percpu_counter_sum+0xd/0x58
[ 762.904542] [<c0349765>] _raw_spin_lock+0x33/0x40
[ 762.904542] [<c0232cc4>] ? __percpu_counter_sum+0xd/0x58
[ 762.904542] [<c0232cc4>] __percpu_counter_sum+0xd/0x58
[ 762.904542] [<c02cebc4>] __sk_mem_schedule+0xdd/0x1c7
[ 762.904542] [<c02d178d>] ? __alloc_skb+0x76/0x100
[ 762.904542] [<c0305e8e>] sk_wmem_schedule+0x21/0x2d
[ 762.904542] [<c0306370>] sk_stream_alloc_skb+0x42/0xaa
[ 762.904542] [<c0306567>] tcp_sendmsg+0x18f/0x68b
[ 762.904542] [<c031f3dc>] ? ip_fast_csum+0x30/0x30
[ 762.904542] [<c0320193>] inet_sendmsg+0x53/0x5a
[ 762.904542] [<c02cb633>] sock_aio_write+0xd2/0xda
[ 762.904542] [<c015876b>] ? mark_lock+0x26/0x1bb
[ 762.904542] [<c01a1017>] do_sync_write+0x9f/0xd9
[ 762.904542] [<c01a2111>] ? file_free_rcu+0x2f/0x2f
[ 762.904542] [<c01a17a1>] vfs_write+0x8f/0xab
[ 762.904542] [<c01a284d>] ? fget_light+0x75/0x7c
[ 762.904542] [<c01a1900>] sys_write+0x3d/0x5e
[ 762.904542] [<c0349ec9>] syscall_call+0x7/0xb
[ 762.904542] [<c0340000>] ? rp_sidt+0x41/0x83
Bug is that sk_sockets_allocated_read_positive() calls
percpu_counter_sum_positive() without BH being disabled.
This bug was added in commit 180d8cd942ce33
(foundations of per-cgroup memory pressure controlling.), since previous
code was using percpu_counter_read_positive() which is IRQ safe.
In __sk_mem_schedule() we dont need the precise count of allocated
sockets and can revert to previous behavior.
Reported-by: Denys Fedoryshchenko <denys@visp.net.lb>
Sined-off-by: Eric Dumazet <edumazet@google.com>
Cc: Glauber Costa <glommer@parallels.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Change order of init so netns init is ready
when register ioctl and netlink.
Ver2
Whitespace fixes and __init added.
Reported-by: "Ryan O'Hara" <rohara@redhat.com>
Signed-off-by: Hans Schillstrom <hans.schillstrom@ericsson.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
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ip_vs_create_timeout_table() can return NULL
All functions protocol init_netns is affected of this patch.
Signed-off-by: Hans Schillstrom <hans.schillstrom@ericsson.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
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git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth
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bridge: set fake_rtable's dst to NULL to avoid kernel Oops
when bridge is deleted before tap/vif device's delete, kernel may
encounter an oops because of NULL reference to fake_rtable's dst.
Set fake_rtable's dst to NULL before sending packets out can solve
this problem.
v4 reformat, change br_drop_fake_rtable(skb) to {}
v3 enrich commit header
v2 introducing new flag DST_FAKE_RTABLE to dst_entry struct.
[ Use "do { } while (0)" for nop br_drop_fake_rtable()
implementation -DaveM ]
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Peter Huang <peter.huangpeng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Conflicts:
drivers/staging/android/lowmemorykiller.c
Change-Id: Ia3ffcfc702e28c4fce0e91b363f4afd5f1c40306
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Fix kernel-doc warning in net/sock.h:
Warning(include/net/sock.h:377): No description found for parameter 'sk_peek_off'
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Functionally, this change is a NOP.
Semantically, rt6_clean_expires() wants to do rt->dst.from = NULL instead of
rt->dst.expires = 0. It is clearing the RTF_EXPIRES flag, so the union is going
to be treated as a pointer (dst.from) not a long (dst.expires).
Signed-off-by: Jiri Bohac <jbohac@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Commit 1716a961 (ipv6: fix problem with expired dst cache) broke PMTU
discovery. rt6_update_expires() calls dst_set_expires(), which only updates
dst->expires if it has not been set previously (expires == 0) or if the new
expires is earlier than the current dst->expires.
rt6_update_expires() needs to zero rt->dst.expires, otherwise it will contain
ivalid data left over from rt->dst.from and will confuse dst_set_expires().
Signed-off-by: Jiri Bohac <jbohac@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: David Ward <david.ward@ll.mit.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
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If a key is non persistent then it should not be used in future
connections but it should be kept for current connection. And it
should be removed when connecion is removed.
Signed-off-by: Vishal Agarwal <vishal.agarwal@stericsson.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
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This patch changes the return type of function hci_persistent_key
from int to bool because it makes more sense to return information
whether a key is persistent or not as a bool.
Signed-off-by: Vishal Agarwal <vishal.agarwal@stericsson.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
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If the ipv6 dst cache which copy from the dst generated by ICMPV6 RA packet.
this dst cache will not check expire because it has no RTF_EXPIRES flag.
So this dst cache will always be used until the dst gc run.
Change the struct dst_entry,add a union contains new pointer from and expires.
When rt6_info.rt6i_flags has no RTF_EXPIRES flag,the dst.expires has no use.
we can use this field to point to where the dst cache copy from.
The dst.from is only used in IPV6.
rt6_check_expired check if rt6_info.dst.from is expired.
ip6_rt_copy only set dst.from when the ort has flag RTF_ADDRCONF
and RTF_DEFAULT.then hold the ort.
ip6_dst_destroy release the ort.
Add some functions to operate the RTF_EXPIRES flag and expires(from) together.
and change the code to use these new adding functions.
Changes from v5:
modify ip6_route_add and ndisc_router_discovery to use new adding functions.
Only set dst.from when the ort has flag RTF_ADDRCONF
and RTF_DEFAULT.then hold the ort.
Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When enabled, tracks the frequency of network transmissions
(inbound and outbound) and buckets them accordingly.
Buckets are determined by time between network activity.
Each bucket represents the number of network transmisions that were
N sec or longer apart. Where N is defined as 1 << bucket index.
This network pattern tracking is particularly useful for wireless
networks (ie: 3G) where batching network activity closely together
is more power efficient than far apart.
New file: /proc/net/stat/activity
output:
Min Bucket(sec) Count
1 7
2 0
4 1
8 0
16 0
32 2
64 1
128 0
Change-Id: I4c4cd8627b872a55f326b1715c51bc3bdd6e8d92
Signed-off-by: Mike Chan <mike@android.com>
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__u16 sco_pkt_type is introduced to struct sockaddr_sco. It allows bitwise
selection of SCO/eSCO packet types. Currently those bits are:
0x0001 HV1 may be used.
0x0002 HV2 may be used.
0x0004 HV3 may be used.
0x0008 EV3 may be used.
0x0010 EV4 may be used.
0x0020 EV5 may be used.
0x0040 2-EV3 may be used.
0x0080 3-EV3 may be used.
0x0100 2-EV5 may be used.
0x0200 3-EV5 may be used.
This is similar to the Packet Type parameter in the HCI Setup Synchronous
Connection Command, except that we are not reversing the logic on the EDR bits.
This makes the use of sco_pkt_tpye forward portable for the use case of
white-listing packet types, which we expect will be the primary use case.
If sco_pkt_type is zero, or userspace uses the old struct sockaddr_sco,
then the default behavior is to allow all packet types.
Packet type selection is just a request made to the Bluetooth chipset, and
it is up to the link manager on the chipset to negiotiate and decide on the
actual packet types used. Furthermore, when a SCO/eSCO connection is eventually
made there is no way for the host stack to determine which packet type was used
(however it is possible to get the link type of SCO or eSCO).
sco_pkt_type is ignored for incoming SCO connections. It is possible
to add this in the future as a parameter to the Accept Synchronous Connection
Command, however its a little trickier because the kernel does not
currently preserve sockaddr_sco data between userspace calls to accept().
The most common use for sco_pkt_type will be to white-list only SCO packets,
which can be done with the hci.h constant SCO_ESCO_MASK.
This patch is motivated by broken Bluetooth carkits such as the Motorolo
HF850 (it claims to support eSCO, but will actually reject eSCO connections
after 5 seconds) and the 2007/2008 Infiniti G35/37 (fails to route audio
if a 2-EV5 packet type is negiotiated). With this patch userspace can maintain
a list of compatible packet types to workaround remote devices such as these.
Based on a patch by Marcel Holtmann.
Rebased to 2.6.39.
Change-Id: Ide1c89574fa4f6f1b9218282e1af17051eb86315
Signed-off-by: Nick Pelly <npelly@google.com>
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This provides userspace debugging tools access to ACL flow control state.
Signed-off-by: Nick Pelly <npelly@google.com>
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Legacy pairing is a bit of a problem because on the incoming end it is
impossible to know pairing has begun:
2009-09-18 18:29:24.115692 > HCI Event: Connect Request (0x04) plen 10
bdaddr 00:23:D4:04:51:7A class 0x58020c type ACL
2009-09-18 18:29:24.115966 < HCI Command: Accept Connection Request (0x01|0x0009) plen 7
bdaddr 00:23:D4:04:51:7A role 0x00
Role: Master
2009-09-18 18:29:24.117065 > HCI Event: Command Status (0x0f) plen 4
Accept Connection Request (0x01|0x0009) status 0x00 ncmd 1
2009-09-18 18:29:24.282928 > HCI Event: Role Change (0x12) plen 8
status 0x00 bdaddr 00:23:D4:04:51:7A role 0x00
Role: Master
2009-09-18 18:29:24.291534 > HCI Event: Connect Complete (0x03) plen 11
status 0x00 handle 1 bdaddr 00:23:D4:04:51:7A type ACL encrypt 0x00
2009-09-18 18:29:24.291839 < HCI Command: Read Remote Supported Features (0x01|0x001b) plen 2
handle 1
2009-09-18 18:29:24.292144 > HCI Event: Page Scan Repetition Mode Change (0x20) plen 7
bdaddr 00:23:D4:04:51:7A mode 1
2009-09-18 18:29:24.293823 > HCI Event: Command Status (0x0f) plen 4
Read Remote Supported Features (0x01|0x001b) status 0x00 ncmd 1
2009-09-18 18:29:24.303588 > HCI Event: Max Slots Change (0x1b) plen 3
handle 1 slots 5
2009-09-18 18:29:24.309448 > HCI Event: Read Remote Supported Features (0x0b) plen 11
status 0x00 handle 1
Features: 0xff 0xff 0x2d 0xfe 0x9b 0xff 0x79 0x83
2009-09-18 18:29:24.345916 < HCI Command: Remote Name Request (0x01|0x0019) plen 10
bdaddr 00:23:D4:04:51:7A mode 2 clkoffset 0x0000
2009-09-18 18:29:24.346923 > HCI Event: Command Status (0x0f) plen 4
Remote Name Request (0x01|0x0019) status 0x00 ncmd 1
2009-09-18 18:29:24.375793 > HCI Event: Remote Name Req Complete (0x07) plen 255
status 0x00 bdaddr 00:23:D4:04:51:7A name 'test'
2009-09-18 18:29:34.332190 < HCI Command: Disconnect (0x01|0x0006) plen 3
handle 1 reason 0x13
There are some mainline patches such as "Add different pairing timeout for
Legacy Pairing" but they do not address the HCI sequence above.
I think the real solution is to avoid using CreateBond(), and instead make
the profile connection immediately. This way both sides will use a longer
timeout because there is a higher level connection in progress, and we will
not end up with the useless HCI sequence above.
Signed-off-by: Nick Pelly <npelly@google.com>
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Introduce a new socket ioctl, SIOCKILLADDR, that nukes all sockets
bound to the same local address. This is useful in situations with
dynamic IPs, to kill stuck connections.
Signed-off-by: Brian Swetland <swetland@google.com>
net: fix tcp_v4_nuke_addr
Signed-off-by: Dima Zavin <dima@android.com>
net: ipv4: Fix a spinlock recursion bug in tcp_v4_nuke.
We can't hold the lock while calling to tcp_done(), so we drop
it before calling. We then have to start at the top of the chain again.
Signed-off-by: Dima Zavin <dima@android.com>
net: ipv4: Fix race in tcp_v4_nuke_addr().
To fix a recursive deadlock in 2.6.29, we stopped holding the hash table lock
across tcp_done() calls. This fixed the deadlock, but introduced a race where
the socket could die or change state.
Fix: Before unlocking the hash table, we grab a reference to the socket. We
can then unlock the hash table without risk of the socket going away. We then
lock the socket, which is safe because it is pinned. We can then call
tcp_done() without recursive deadlock and without race. Upon return, we unlock
the socket and then unpin it, killing it.
Change-Id: Idcdae072b48238b01bdbc8823b60310f1976e045
Signed-off-by: Robert Love <rlove@google.com>
Acked-by: Dima Zavin <dima@android.com>
ipv4: disable bottom halves around call to tcp_done().
Signed-off-by: Robert Love <rlove@google.com>
Signed-off-by: Colin Cross <ccross@android.com>
ipv4: Move sk_error_report inside bh_lock_sock in tcp_v4_nuke_addr
When sk_error_report is called, it wakes up the user-space thread, which then
calls tcp_close. When the tcp_close is interrupted by the tcp_v4_nuke_addr
ioctl thread running tcp_done, it leaks 392 bytes and triggers a WARN_ON.
This patch moves the call to sk_error_report inside the bh_lock_sock, which
matches the locking used in tcp_v4_err.
Signed-off-by: Colin Cross <ccross@android.com>
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When the control-rate tables are not set up correctly, it makes
little sense to spam the logs, thus change the WARN_ON to WARN_ON_ONCE.
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
|
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git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth
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|
To ensure that old user space versions do not accidentally pick up and
try to use the management channel, use a different channel number.
Reported-by: Keith Packard <keithp@keithp.com>
Acked-by: Johan Hedberg <johan.hedberg@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo Padovan <gustavo@padovan.org>
|
|
|
|
Silence sparse warnings:
net/bluetooth/mgmt.c:865:19: warning: cast to restricted __le16
Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo Padovan <gustavo@padovan.org>
|
|
If passed 0 as data_length the (parsed < data_length - 1) test will be
true and cause a buffer overflow. In practice we need at least two bytes
for the element length and type so add a test for it to the very
beginning of the function.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo Padovan <gustavo@padovan.org>
|
|
The parsed variable is already incremented inside the for-loop so there
no need to increment it again (not to mention that the code was
incrementing it the wrong amount).
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo Padovan <gustavo@padovan.org>
|
|
Make sure hci_dev_open returns immediately if hci_dev_unregister has
been called.
This fixes a race between hci_dev_open and hci_dev_unregister which can
lead to a NULL-pointer dereference.
Bug is 100% reproducible using hciattach and a disconnected serial port:
0. # hciattach -n /dev/ttyO1 any noflow
1. hci_dev_open called from hci_power_on grabs req lock
2. hci_init_req executes but device fails to initialise (times out
eventually)
3. hci_dev_open is called from hci_sock_ioctl and sleeps on req lock
4. hci_uart_tty_close calls hci_dev_unregister and sleeps on req lock in
hci_dev_do_close
5. hci_dev_open (1) releases req lock
6. hci_dev_do_close grabs req lock and returns as device is not up
7. hci_dev_unregister sleeps in destroy_workqueue
8. hci_dev_open (3) grabs req lock, calls hci_init_req and eventually sleeps
9. hci_dev_unregister finishes, while hci_dev_open is still running...
[ 79.627136] INFO: trying to register non-static key.
[ 79.632354] the code is fine but needs lockdep annotation.
[ 79.638122] turning off the locking correctness validator.
[ 79.643920] [<c00188bc>] (unwind_backtrace+0x0/0xf8) from [<c00729c4>] (__lock_acquire+0x1590/0x1ab0)
[ 79.653594] [<c00729c4>] (__lock_acquire+0x1590/0x1ab0) from [<c00733f8>] (lock_acquire+0x9c/0x128)
[ 79.663085] [<c00733f8>] (lock_acquire+0x9c/0x128) from [<c0040a88>] (run_timer_softirq+0x150/0x3ac)
[ 79.672668] [<c0040a88>] (run_timer_softirq+0x150/0x3ac) from [<c003a3b8>] (__do_softirq+0xd4/0x22c)
[ 79.682281] [<c003a3b8>] (__do_softirq+0xd4/0x22c) from [<c003a924>] (irq_exit+0x8c/0x94)
[ 79.690856] [<c003a924>] (irq_exit+0x8c/0x94) from [<c0013a50>] (handle_IRQ+0x34/0x84)
[ 79.699157] [<c0013a50>] (handle_IRQ+0x34/0x84) from [<c0008530>] (omap3_intc_handle_irq+0x48/0x4c)
[ 79.708648] [<c0008530>] (omap3_intc_handle_irq+0x48/0x4c) from [<c037499c>] (__irq_usr+0x3c/0x60)
[ 79.718048] Exception stack(0xcf281fb0 to 0xcf281ff8)
[ 79.723358] 1fa0: 0001e6a0 be8dab00 0001e698 00036698
[ 79.731933] 1fc0: 0002df98 0002df38 0000001f 00000000 b6f234d0 00000000 00000004 00000000
[ 79.740509] 1fe0: 0001e6f8 be8d6aa0 be8dac50 0000aab8 80000010 ffffffff
[ 79.747497] Unable to handle kernel NULL pointer dereference at virtual address 00000000
[ 79.756011] pgd = cf3b4000
[ 79.758850] [00000000] *pgd=8f0c7831, *pte=00000000, *ppte=00000000
[ 79.765502] Internal error: Oops: 80000007 [#1]
[ 79.770294] Modules linked in:
[ 79.773529] CPU: 0 Tainted: G W (3.3.0-rc6-00002-gb5d5c87 #421)
[ 79.781066] PC is at 0x0
[ 79.783721] LR is at run_timer_softirq+0x16c/0x3ac
[ 79.788787] pc : [<00000000>] lr : [<c0040aa4>] psr: 60000113
[ 79.788787] sp : cf281ee0 ip : 00000000 fp : cf280000
[ 79.800903] r10: 00000004 r9 : 00000100 r8 : b6f234d0
[ 79.806427] r7 : c0519c28 r6 : cf093488 r5 : c0561a00 r4 : 00000000
[ 79.813323] r3 : 00000000 r2 : c054eee0 r1 : 00000001 r0 : 00000000
[ 79.820190] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user
[ 79.827728] Control: 10c5387d Table: 8f3b4019 DAC: 00000015
[ 79.833801] Process gpsd (pid: 1265, stack limit = 0xcf2802e8)
[ 79.839965] Stack: (0xcf281ee0 to 0xcf282000)
[ 79.844573] 1ee0: 00000002 00000000 c0040a24 00000000 00000002 cf281f08 00200200 00000000
[ 79.853210] 1f00: 00000000 cf281f18 cf281f08 00000000 00000000 00000000 cf281f18 cf281f18
[ 79.861816] 1f20: 00000000 00000001 c056184c 00000000 00000001 b6f234d0 c0561848 00000004
[ 79.870452] 1f40: cf280000 c003a3b8 c051e79c 00000001 00000000 00000100 3fa9e7b8 0000000a
[ 79.879089] 1f60: 00000025 cf280000 00000025 00000000 00000000 b6f234d0 00000000 00000004
[ 79.887756] 1f80: 00000000 c003a924 c053ad38 c0013a50 fa200000 cf281fb0 ffffffff c0008530
[ 79.896362] 1fa0: 0001e6a0 0000aab8 80000010 c037499c 0001e6a0 be8dab00 0001e698 00036698
[ 79.904998] 1fc0: 0002df98 0002df38 0000001f 00000000 b6f234d0 00000000 00000004 00000000
[ 79.913665] 1fe0: 0001e6f8 be8d6aa0 be8dac50 0000aab8 80000010 ffffffff 00fbf700 04ffff00
[ 79.922302] [<c0040aa4>] (run_timer_softirq+0x16c/0x3ac) from [<c003a3b8>] (__do_softirq+0xd4/0x22c)
[ 79.931945] [<c003a3b8>] (__do_softirq+0xd4/0x22c) from [<c003a924>] (irq_exit+0x8c/0x94)
[ 79.940582] [<c003a924>] (irq_exit+0x8c/0x94) from [<c0013a50>] (handle_IRQ+0x34/0x84)
[ 79.948913] [<c0013a50>] (handle_IRQ+0x34/0x84) from [<c0008530>] (omap3_intc_handle_irq+0x48/0x4c)
[ 79.958404] [<c0008530>] (omap3_intc_handle_irq+0x48/0x4c) from [<c037499c>] (__irq_usr+0x3c/0x60)
[ 79.967773] Exception stack(0xcf281fb0 to 0xcf281ff8)
[ 79.973083] 1fa0: 0001e6a0 be8dab00 0001e698 00036698
[ 79.981658] 1fc0: 0002df98 0002df38 0000001f 00000000 b6f234d0 00000000 00000004 00000000
[ 79.990234] 1fe0: 0001e6f8 be8d6aa0 be8dac50 0000aab8 80000010 ffffffff
[ 79.997161] Code: bad PC value
[ 80.000396] ---[ end trace 6f6739840475f9ee ]---
[ 80.005279] Kernel panic - not syncing: Fatal exception in interrupt
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
|
|
This patch uses the correct flags for checking the HCI_SSP_ENABLED bit.
Without this authentication request was not being initiated.
Signed-off-by: Hemant Gupta <hemant.gupta@stericsson.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless
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|
Pull networking fixes from David Miller:
1) Name string overrun fix in gianfar driver from Joe Perches.
2) VHOST bug fixes from Michael S. Tsirkin and Nadav Har'El
3) Fix dependencies on xt_LOG netfilter module, from Pablo Neira Ayuso.
4) Fix RCU locking in xt_CT, also from Pablo Neira Ayuso.
5) Add a parameter to skb_add_rx_frag() so we can fix the truesize
adjustments in the drivers that use it. The individual drivers
aren't fixed by this commit, but will be dealt with using follow-on
commits. From Eric Dumazet.
6) Add some device IDs to qmi_wwan driver, from Andrew Bird.
7) Fix a potential rcu_read_lock() imbalancein rt6_fill_node(). From
Eric Dumazet.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
net: fix a potential rcu_read_lock() imbalance in rt6_fill_node()
net: add a truesize parameter to skb_add_rx_frag()
gianfar: Fix possible overrun and simplify interrupt name field creation
USB: qmi_wwan: Add ZTE (Vodafone) K3570-Z and K3571-Z net interfaces
USB: option: Ignore ZTE (Vodafone) K3570/71 net interfaces
USB: qmi_wwan: Add ZTE (Vodafone) K3565-Z and K4505-Z net interfaces
qlcnic: Bug fix for LRO
netfilter: nf_conntrack: permanently attach timeout policy to conntrack
netfilter: xt_CT: fix assignation of the generic protocol tracker
netfilter: xt_CT: missing rcu_read_lock section in timeout assignment
netfilter: cttimeout: fix dependency with l4protocol conntrack module
netfilter: xt_LOG: use CONFIG_IP6_NF_IPTABLES instead of CONFIG_IPV6
vhost: fix release path lockdep checks
vhost: don't forget to schedule()
tools/virtio: stub out strong barriers
tools/virtio: add linux/hrtimer.h stub
tools/virtio: add linux/module.h stub
|
|
The station_info struct had demanded dBm signal values, but the
cfg80211 wireless extensions implementation was also accepting
"unspecified" (i.e. RSSI) unit values while the nl80211 code was
completely unaware of them. Resolve this by formally allowing the
"unspecified" units while making nl80211 ignore them.
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
|
|
At least on ia64 the (bogus) use of xchg() here results in the compiler
warning about an unused expression result. As only an assignment is
intended here, convert it to such.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
Pull <linux/device.h> avoidance patches from Paul Gortmaker:
"Nearly every subsystem has some kind of header with a proto like:
void foo(struct device *dev);
and yet there is no reason for most of these guys to care about the
sub fields within the device struct. This allows us to significantly
reduce the scope of headers including headers. For this instance, a
reduction of about 40% is achieved by replacing the include with the
simple fact that the device is some kind of a struct.
Unlike the much larger module.h cleanup, this one is simply two
commits. One to fix the implicit <linux/device.h> users, and then one
to delete the device.h includes from the linux/include/ dir wherever
possible."
* tag 'device-for-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux:
device.h: audit and cleanup users in main include dir
device.h: cleanup users outside of linux/include (C files)
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
Pull <linux/bug.h> cleanup from Paul Gortmaker:
"The changes shown here are to unify linux's BUG support under the one
<linux/bug.h> file. Due to historical reasons, we have some BUG code
in bug.h and some in kernel.h -- i.e. the support for BUILD_BUG in
linux/kernel.h predates the addition of linux/bug.h, but old code in
kernel.h wasn't moved to bug.h at that time. As a band-aid, kernel.h
was including <asm/bug.h> to pseudo link them.
This has caused confusion[1] and general yuck/WTF[2] reactions. Here
is an example that violates the principle of least surprise:
CC lib/string.o
lib/string.c: In function 'strlcat':
lib/string.c:225:2: error: implicit declaration of function 'BUILD_BUG_ON'
make[2]: *** [lib/string.o] Error 1
$
$ grep linux/bug.h lib/string.c
#include <linux/bug.h>
$
We've included <linux/bug.h> for the BUG infrastructure and yet we
still get a compile fail! [We've not kernel.h for BUILD_BUG_ON.] Ugh -
very confusing for someone who is new to kernel development.
With the above in mind, the goals of this changeset are:
1) find and fix any include/*.h files that were relying on the
implicit presence of BUG code.
2) find and fix any C files that were consuming kernel.h and hence
relying on implicitly getting some/all BUG code.
3) Move the BUG related code living in kernel.h to <linux/bug.h>
4) remove the asm/bug.h from kernel.h to finally break the chain.
During development, the order was more like 3-4, build-test, 1-2. But
to ensure that git history for bisect doesn't get needless build
failures introduced, the commits have been reorderd to fix the problem
areas in advance.
[1] https://lkml.org/lkml/2012/1/3/90
[2] https://lkml.org/lkml/2012/1/17/414"
Fix up conflicts (new radeon file, reiserfs header cleanups) as per Paul
and linux-next.
* tag 'bug-for-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux:
kernel.h: doesn't explicitly use bug.h, so don't include it.
bug: consolidate BUILD_BUG_ON with other bug code
BUG: headers with BUG/BUG_ON etc. need linux/bug.h
bug.h: add include of it to various implicit C users
lib: fix implicit users of kernel.h for TAINT_WARN
spinlock: macroize assert_spin_locked to avoid bug.h dependency
x86: relocate get/set debugreg fcns to include/asm/debugreg.
|
|
In some cases the poll() implementation in a driver has to do different
things depending on the events the caller wants to poll for. An example
is when a driver needs to start a DMA engine if the caller polls for
POLLIN, but doesn't want to do that if POLLIN is not requested but instead
only POLLOUT or POLLPRI is requested. This is something that can happen
in the video4linux subsystem among others.
Unfortunately, the current epoll/poll/select implementation doesn't
provide that information reliably. The poll_table_struct does have it: it
has a key field with the event mask. But once a poll() call matches one
or more bits of that mask any following poll() calls are passed a NULL
poll_table pointer.
Also, the eventpoll implementation always left the key field at ~0 instead
of using the requested events mask.
This was changed in eventpoll.c so the key field now contains the actual
events that should be polled for as set by the caller.
The solution to the NULL poll_table pointer is to set the qproc field to
NULL in poll_table once poll() matches the events, not the poll_table
pointer itself. That way drivers can obtain the mask through a new
poll_requested_events inline.
The poll_table_struct can still be NULL since some kernel code calls it
internally (netfs_state_poll() in ./drivers/staging/pohmelfs/netfs.h). In
that case poll_requested_events() returns ~0 (i.e. all events).
Very rarely drivers might want to know whether poll_wait will actually
wait. If another earlier file descriptor in the set already matched the
events the caller wanted to wait for, then the kernel will return from the
select() call without waiting. This might be useful information in order
to avoid doing expensive work.
A new helper function poll_does_not_wait() is added that drivers can use
to detect this situation. This is now used in sock_poll_wait() in
include/net/sock.h. This was the only place in the kernel that needed
this information.
Drivers should no longer access any of the poll_table internals, but use
the poll_requested_events() and poll_does_not_wait() access functions
instead. In order to enforce that the poll_table fields are now prepended
with an underscore and a comment was added warning against using them
directly.
This required a change in unix_dgram_poll() in unix/af_unix.c which used
the key field to get the requested events. It's been replaced by a call
to poll_requested_events().
For qproc it was especially important to change its name since the
behavior of that field changes with this patch since this function pointer
can now be NULL when that wasn't possible in the past.
Any driver accessing the qproc or key fields directly will now fail to compile.
Some notes regarding the correctness of this patch: the driver's poll()
function is called with a 'struct poll_table_struct *wait' argument. This
pointer may or may not be NULL, drivers can never rely on it being one or
the other as that depends on whether or not an earlier file descriptor in
the select()'s fdset matched the requested events.
There are only three things a driver can do with the wait argument:
1) obtain the key field:
events = wait ? wait->key : ~0;
This will still work although it should be replaced with the new
poll_requested_events() function (which does exactly the same).
This will now even work better, since wait is no longer set to NULL
unnecessarily.
2) use the qproc callback. This could be deadly since qproc can now be
NULL. Renaming qproc should prevent this from happening. There are no
kernel drivers that actually access this callback directly, BTW.
3) test whether wait == NULL to determine whether poll would return without
waiting. This is no longer sufficient as the correct test is now
wait == NULL || wait->_qproc == NULL.
However, the worst that can happen here is a slight performance hit in
the case where wait != NULL and wait->_qproc == NULL. In that case the
driver will assume that poll_wait() will actually add the fd to the set
of waiting file descriptors. Of course, poll_wait() will not do that
since it tests for wait->_qproc. This will not break anything, though.
There is only one place in the whole kernel where this happens
(sock_poll_wait() in include/net/sock.h) and that code will be replaced
by a call to poll_does_not_wait() in the next patch.
Note that even if wait->_qproc != NULL drivers cannot rely on poll_wait()
actually waiting. The next file descriptor from the set might match the
event mask and thus any possible waits will never happen.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Jonathan Corbet <corbet@lwn.net>
Reviewed-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: Davide Libenzi <davidel@xmailserver.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: David Miller <davem@davemloft.net>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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|
This patch introduces nf_conntrack_l4proto_find_get() and
nf_conntrack_l4proto_put() to fix module dependencies between
timeout objects and l4-protocol conntrack modules.
Thus, we make sure that the module cannot be removed if it is
used by any of the cttimeout objects.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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|
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs pile 1 from Al Viro:
"This is _not_ all; in particular, Miklos' and Jan's stuff is not there
yet."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (64 commits)
ext4: initialization of ext4_li_mtx needs to be done earlier
debugfs-related mode_t whack-a-mole
hfsplus: add an ioctl to bless files
hfsplus: change finder_info to u32
hfsplus: initialise userflags
qnx4: new helper - try_extent()
qnx4: get rid of qnx4_bread/qnx4_getblk
take removal of PF_FORKNOEXEC to flush_old_exec()
trim includes in inode.c
um: uml_dup_mmap() relies on ->mmap_sem being held, but activate_mm() doesn't hold it
um: embed ->stub_pages[] into mmu_context
gadgetfs: list_for_each_safe() misuse
ocfs2: fix leaks on failure exits in module_init
ecryptfs: make register_filesystem() the last potential failure exit
ntfs: forgets to unregister sysctls on register_filesystem() failure
logfs: missing cleanup on register_filesystem() failure
jfs: mising cleanup on register_filesystem() failure
make configfs_pin_fs() return root dentry on success
configfs: configfs_create_dir() has parent dentry in dentry->d_parent
configfs: sanitize configfs_create()
...
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|
git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
Pull security subsystem updates for 3.4 from James Morris:
"The main addition here is the new Yama security module from Kees Cook,
which was discussed at the Linux Security Summit last year. Its
purpose is to collect miscellaneous DAC security enhancements in one
place. This also marks a departure in policy for LSM modules, which
were previously limited to being standalone access control systems.
Chromium OS is using Yama, and I believe there are plans for Ubuntu,
at least.
This patchset also includes maintenance updates for AppArmor, TOMOYO
and others."
Fix trivial conflict in <net/sock.h> due to the jumo_label->static_key
rename.
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (38 commits)
AppArmor: Fix location of const qualifier on generated string tables
TOMOYO: Return error if fails to delete a domain
AppArmor: add const qualifiers to string arrays
AppArmor: Add ability to load extended policy
TOMOYO: Return appropriate value to poll().
AppArmor: Move path failure information into aa_get_name and rename
AppArmor: Update dfa matching routines.
AppArmor: Minor cleanup of d_namespace_path to consolidate error handling
AppArmor: Retrieve the dentry_path for error reporting when path lookup fails
AppArmor: Add const qualifiers to generated string tables
AppArmor: Fix oops in policy unpack auditing
AppArmor: Fix error returned when a path lookup is disconnected
KEYS: testing wrong bit for KEY_FLAG_REVOKED
TOMOYO: Fix mount flags checking order.
security: fix ima kconfig warning
AppArmor: Fix the error case for chroot relative path name lookup
AppArmor: fix mapping of META_READ to audit and quiet flags
AppArmor: Fix underflow in xindex calculation
AppArmor: Fix dropping of allowed operations that are force audited
AppArmor: Add mising end of structure test to caps unpacking
...
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Pull networking merge from David Miller:
"1) Move ixgbe driver over to purely page based buffering on receive.
From Alexander Duyck.
2) Add receive packet steering support to e1000e, from Bruce Allan.
3) Convert TCP MD5 support over to RCU, from Eric Dumazet.
4) Reduce cpu usage in handling out-of-order TCP packets on modern
systems, also from Eric Dumazet.
5) Support the IP{,V6}_UNICAST_IF socket options, making the wine
folks happy, from Erich Hoover.
6) Support VLAN trunking from guests in hyperv driver, from Haiyang
Zhang.
7) Support byte-queue-limtis in r8169, from Igor Maravic.
8) Outline code intended for IP_RECVTOS in IP_PKTOPTIONS existed but
was never properly implemented, Jiri Benc fixed that.
9) 64-bit statistics support in r8169 and 8139too, from Junchang Wang.
10) Support kernel side dump filtering by ctmark in netfilter
ctnetlink, from Pablo Neira Ayuso.
11) Support byte-queue-limits in gianfar driver, from Paul Gortmaker.
12) Add new peek socket options to assist with socket migration, from
Pavel Emelyanov.
13) Add sch_plug packet scheduler whose queue is controlled by
userland daemons using explicit freeze and release commands. From
Shriram Rajagopalan.
14) Fix FCOE checksum offload handling on transmit, from Yi Zou."
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1846 commits)
Fix pppol2tp getsockname()
Remove printk from rds_sendmsg
ipv6: fix incorrent ipv6 ipsec packet fragment
cpsw: Hook up default ndo_change_mtu.
net: qmi_wwan: fix build error due to cdc-wdm dependecy
netdev: driver: ethernet: Add TI CPSW driver
netdev: driver: ethernet: add cpsw address lookup engine support
phy: add am79c874 PHY support
mlx4_core: fix race on comm channel
bonding: send igmp report for its master
fs_enet: Add MPC5125 FEC support and PHY interface selection
net: bpf_jit: fix BPF_S_LDX_B_MSH compilation
net: update the usage of CHECKSUM_UNNECESSARY
fcoe: use CHECKSUM_UNNECESSARY instead of CHECKSUM_PARTIAL on tx
net: do not do gso for CHECKSUM_UNNECESSARY in netif_needs_gso
ixgbe: Fix issues with SR-IOV loopback when flow control is disabled
net/hyperv: Fix the code handling tx busy
ixgbe: fix namespace issues when FCoE/DCB is not enabled
rtlwifi: Remove unused ETH_ADDR_LEN defines
igbvf: Use ETH_ALEN
...
Fix up fairly trivial conflicts in drivers/isdn/gigaset/interface.c and
drivers/net/usb/{Kconfig,qmi_wwan.c} as per David.
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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