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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs fixes from Al Viro.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
posix_acl: de-union a_refcount and a_rcu
nfs_atomic_open(): prevent parallel nfs_lookup() on a negative hashed
Use the right predicate in ->atomic_open() instances
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Currently the two are unioned together, but I don't think that's safe.
It looks like get_cached_acl could race with the last put in
posix_acl_release. get_cached_acl calls atomic_inc_not_zero on
a_refcount, but that field could have already been clobbered by
call_rcu, and may no longer be zero. Fix this by de-unioning the two
fields.
Fixes: b8a7a3a66747 (posix_acl: Inode acl caching fixes)
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Pull networking fixes from David Miller:
1) All users of AF_PACKET's fanout feature want a symmetric packet
header hash for load balancing purposes, so give it to them.
2) Fix vlan state synchronization in e1000e, from Jarod Wilson.
3) Use correct socket pointer in ip_skb_dst_mtu(), from Shmulik
Ladkani.
4) mlx5 bug fixes from Mohamad Haj Yahia, Daniel Jurgens, Matthew
Finlay, Rana Shahout, and Shaker Daibes. Mostly to do with
operation timeouts and PCI error handling.
5) Fix checksum handling in mirred packet action, from WANG Cong.
6) Set skb->dev correctly when transmitting in !protect_frames case of
macsec driver, from Daniel Borkmann.
7) Fix MTU calculation in geneve driver, from Haishuang Yan.
8) Missing netif_napi_del() in unregister path of qeth driver, from
Ursula Braun.
9) Handle malformed route netlink messages in decnet properly, from
Vergard Nossum.
10) Memory leak of percpu data in ipv6 routing code, from Martin KaFai
Lau.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (41 commits)
ipv6: Fix mem leak in rt6i_pcpu
net: fix decnet rtnexthop parsing
cxgb4: update latest firmware version supported
net/mlx5: Avoid setting unused var when modifying vport node GUID
bonding: fix enslavement slave link notifications
r8152: fix runtime function for RTL8152
qeth: delete napi struct when removing a qeth device
Revert "fsl/fman: fix error handling"
fsl/fman: fix error handling
cdc_ncm: workaround for EM7455 "silent" data interface
RDS: fix rds_tcp_init() error path
geneve: fix max_mtu setting
net: phy: dp83867: Fix initialization of PHYCR register
enc28j60: Fix race condition in enc28j60 driver
net: stmmac: Fix null-function call in ISR on stmmac1000
tipc: fix nl compat regression for link statistics
net: bcmsysport: Device stats are unsigned long
macsec: set actual real device for xmit when !protect_frames
net_sched: fix mirrored packets checksum
packet: Use symmetric hash for PACKET_FANOUT_HASH.
...
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Similar to commit 9b368814b336 ("net: fix bridge multicast packet checksum validation")
we need to fixup the checksum for CHECKSUM_COMPLETE when
pushing skb on RX path. Otherwise we get similar splats.
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Tom Herbert <tom@herbertland.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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People who use PACKET_FANOUT_HASH want a symmetric hash, meaning that
they want packets going in both directions on a flow to hash to the
same bucket.
The core kernel SKB hash became non-symmetric when the ipv6 flow label
and other entities were incorporated into the standard flow hash order
to increase entropy.
But there are no users of PACKET_FANOUT_HASH who want an assymetric
hash, they all want a symmetric one.
Therefore, use the flow dissector to compute a flat symmetric hash
over only the protocol, addresses and ports. This hash does not get
installed into and override the normal skb hash, so this change has
no effect whatsoever on the rest of the stack.
Reported-by: Eric Leblond <eric@regit.org>
Tested-by: Eric Leblond <eric@regit.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB and PHY fixes from Greg KH:
"Here are a number of small USB and PHY driver fixes for 4.7-rc6.
Nothing major here, all are described in the shortlog below. All have
been in linux-next with no reported issues"
* tag 'usb-4.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
USB: don't free bandwidth_mutex too early
USB: EHCI: declare hostpc register as zero-length array
phy-sun4i-usb: Fix irq free conditions to match request conditions
phy: bcm-ns-usb2: checking the wrong variable
phy-sun4i-usb: fix missing __iomem *
phy: phy-sun4i-usb: Fix optional gpios failing probe
phy: rockchip-dp: fix return value check in rockchip_dp_phy_probe()
phy: rcar-gen3-usb2: fix unexpected repeat interrupts of VBUS change
usb: common: otg-fsm: add license to usb-otg-fsm
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The current implementation does not handle timeout in case of command
with callback request, and this can lead to deadlock if the command
doesn't get fw response.
Add delayed callback timeout work before posting the command to fw.
In case of real fw command completion we will cancel the delayed work.
In case of fw command timeout the callback timeout handler will be
called and it will simulate fw completion with timeout error.
Fixes: e126ba97dba9 ('mlx5: Add driver for Mellanox Connect-IB adapters')
Signed-off-by: Mohamad Haj Yahia <mohamad@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
Pull pwm fixes from Thierry Reding:
"One more fix for some fallout observed after the introduction of the
atomic API"
* tag 'pwm/for-4.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm:
pwm: Fix pwm_apply_args()
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git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
Pull MFD fixes from Lee Jones:
"Contained are some standard fixes and unusually an extension to the
Reset API. Some of those changes are required to fix a bug introduced
in -rc1, which introduces extra 'reset line checks' i.e. whether the
line is shared or not. If a line is shared and the new *_shared() API
is not used, the request fails with an error. This breaks USB in v4.7
for ST's platforms.
Admittedly, there are some patches contained in our (MFD/Reset)
immutable branch which are not true -fixes, but there isn't anything I
can do about that. Rest assured though, there aren't any API
'changes'. Everything is the same from the consumer's perspective.
- Use new reset_*_get_shared() variant to prevent reset line
obtainment failure (Fixes commit 0b52297f2288: "reset: Add support
for shared reset controls")
- Fix unintentional switch() fall-through into error path
- Fix uninitialised variable compiler warning"
* tag 'mfd-fixes-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd:
mfd: da9053: Fix compiler warning message for uninitialised variable
mfd: max77620: Fix FPS switch statements
phy: phy-stih407-usb: Inform the reset framework that our reset line may be shared
usb: dwc3: st: Inform the reset framework that our reset line may be shared
usb: host: ehci-st: Inform the reset framework that our reset line may be shared
usb: host: ohci-st: Inform the reset framework that our reset line may be shared
reset: TRIVIAL: Add line break at same place for similar APIs
reset: Supply *_shared variant calls when using *_optional APIs
reset: Supply *_shared variant calls when using of_* API
reset: Ensure drivers are explicit when requesting reset lines
reset: Reorder inline reset_control_get*() wrappers
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Fix compiler warning caused by an uninitialised variable inside
da9052_group_write() function. Defaulting the value to zero covers
the trivial case.
Signed-off-by: Steve Twiss <stwiss.opensource@diasemi.com>
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
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Pull audit fixes from Paul Moore:
"Two small patches to fix audit problems in 4.7-rcX: the first fixes a
potential kref leak, the second removes some header file noise.
The first is an important bug fix that really should go in before 4.7
is released, the second is not critical, but falls into the very-nice-
to-have category so I'm including in the pull request.
Both patches are straightforward, self-contained, and pass our
testsuite without problem"
* 'stable-4.7' of git://git.infradead.org/users/pcmoore/audit:
audit: move audit_get_tty to reduce scope and kabi changes
audit: move calcs after alloc and check when logging set loginuid
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Standardise the way inline functions:
devm_reset_control_get_shared_by_index
devm_reset_control_get_exclusive_by_index
... are formatted.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
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Consumers need to be able to specify whether they are requesting an
'exclusive' or 'shared' reset line no matter which API (of_*, devm_*,
etc) they are using. This change allows users of the optional_* API
in particular to specify that their request is for a 'shared' line.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
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Consumers need to be able to specify whether they are requesting an
'exclusive' or 'shared' reset line no matter which API (of_*, devm_*,
etc) they are using. This change allows users of the of_* API in
particular to specify that their request is for a 'shared' line.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
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Phasing out generic reset line requests enables us to make some better
decisions on when and how to (de)assert said lines. If an 'exclusive'
line is requested, we know a device *requires* a reset and that it's
preferable to act upon a request right away. However, if a 'shared'
reset line is requested, we can reasonably assume sure that placing a
device into reset isn't a hard requirement, but probably a measure to
save power and is thus able to cope with not being asserted if another
device is still in use.
In order allow gentle adoption and not to forcing all consumers to
move to the API immediately, causing administration headache between
subsystems, this patch adds some temporary stand-in shim-calls. This
will ease the burden at merge time and allow subsystems to migrate over
to the new API in a more realistic time-frame.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
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We're about to split the current API into two, where consumers will
be forced to be explicit when requesting reset lines. The choice
will be to either the call the *_exclusive or *_shared variant
depending on whether they can actually tolorate not being asserted
when that request is made.
The new API will look like this once reorded and complete:
reset_control_get_exclusive()
reset_control_get_shared()
reset_control_get_optional_exclusive()
reset_control_get_optional_shared()
of_reset_control_get_exclusive()
of_reset_control_get_shared()
of_reset_control_get_exclusive_by_index()
of_reset_control_get_shared_by_index()
devm_reset_control_get_exclusive()
devm_reset_control_get_shared()
devm_reset_control_get_optional_exclusive()
devm_reset_control_get_optional_shared()
devm_reset_control_get_exclusive_by_index()
devm_reset_control_get_shared_by_index()
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
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Pull networking fixes from David Miller:
"I've been traveling so this accumulates more than week or so of bug
fixing. It perhaps looks a little worse than it really is.
1) Fix deadlock in ath10k driver, from Ben Greear.
2) Increase scan timeout in iwlwifi, from Luca Coelho.
3) Unbreak STP by properly reinjecting STP packets back into the
stack. Regression fix from Ido Schimmel.
4) Mediatek driver fixes (missing malloc failure checks, leaking of
scratch memory, wrong indexing when mapping TX buffers, etc.) from
John Crispin.
5) Fix endianness bug in icmpv6_err() handler, from Hannes Frederic
Sowa.
6) Fix hashing of flows in UDP in the ruseport case, from Xuemin Su.
7) Fix netlink notifications in ovs for tunnels, delete link messages
are never emitted because of how the device registry state is
handled. From Nicolas Dichtel.
8) Conntrack module leaks kmemcache on unload, from Florian Westphal.
9) Prevent endless jump loops in nft rules, from Liping Zhang and
Pablo Neira Ayuso.
10) Not early enough spinlock initialization in mlx4, from Eric
Dumazet.
11) Bind refcount leak in act_ipt, from Cong WANG.
12) Missing RCU locking in HTB scheduler, from Florian Westphal.
13) Several small MACSEC bug fixes from Sabrina Dubroca (missing RCU
barrier, using heap for SG and IV, and erroneous use of async flag
when allocating AEAD conext.)
14) RCU handling fix in TIPC, from Ying Xue.
15) Pass correct protocol down into ipv4_{update_pmtu,redirect}() in
SIT driver, from Simon Horman.
16) Socket timer deadlock fix in TIPC from Jon Paul Maloy.
17) Fix potential deadlock in team enslave, from Ido Schimmel.
18) Memory leak in KCM procfs handling, from Jiri Slaby.
19) ESN generation fix in ipv4 ESP, from Herbert Xu.
20) Fix GFP_KERNEL allocations with locks held in act_ife, from Cong
WANG.
21) Use after free in netem, from Eric Dumazet.
22) Uninitialized last assert time in multicast router code, from Tom
Goff.
23) Skip raw sockets in sock_diag destruction broadcast, from Willem
de Bruijn.
24) Fix link status reporting in thunderx, from Sunil Goutham.
25) Limit resegmentation of retransmit queue so that we do not
retransmit too large GSO frames. From Eric Dumazet.
26) Delay bpf program release after grace period, from Daniel
Borkmann"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (141 commits)
openvswitch: fix conntrack netlink event delivery
qed: Protect the doorbell BAR with the write barriers.
neigh: Explicitly declare RCU-bh read side critical section in neigh_xmit()
e1000e: keep VLAN interfaces functional after rxvlan off
cfg80211: fix proto in ieee80211_data_to_8023 for frames without LLC header
qlcnic: use the correct ring in qlcnic_83xx_process_rcv_ring_diag()
bpf, perf: delay release of BPF prog after grace period
net: bridge: fix vlan stats continue counter
tcp: do not send too big packets at retransmit time
ibmvnic: fix to use list_for_each_safe() when delete items
net: thunderx: Fix TL4 configuration for secondary Qsets
net: thunderx: Fix link status reporting
net/mlx5e: Reorganize ethtool statistics
net/mlx5e: Fix number of PFC counters reported to ethtool
net/mlx5e: Prevent adding the same vxlan port
net/mlx5e: Check for BlueFlame capability before allocating SQ uar
net/mlx5e: Change enum to better reflect usage
net/mlx5: Add ConnectX-5 PCIe 4.0 to list of supported devices
net/mlx5: Update command strings
net: marvell: Add separate config ANEG function for Marvell 88E1111
...
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Commit dead9f29ddcc ("perf: Fix race in BPF program unregister") moved
destruction of BPF program from free_event_rcu() callback to __free_event(),
which is problematic if used with tail calls: if prog A is attached as
trace event directly, but at the same time present in a tail call map used
by another trace event program elsewhere, then we need to delay destruction
via RCU grace period since it can still be in use by the program doing the
tail call (the prog first needs to be dropped from the tail call map, then
trace event with prog A attached destroyed, so we get immediate destruction).
Fixes: dead9f29ddcc ("perf: Fix race in BPF program unregister")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Cc: Jann Horn <jann@thejh.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The only users of audit_get_tty and audit_put_tty are internal to
audit, so move it out of include/linux/audit.h to kernel.h and create
a proper function rather than inlining it. This also reduces kABI
changes.
Suggested-by: Paul Moore <pmoore@redhat.com>
Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
[PM: line wrapped description]
Signed-off-by: Paul Moore <paul@paul-moore.com>
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Diag intends to broadcast tcp_sk and udp_sk socket destruction.
Testing sk->sk_protocol for IPPROTO_TCP/IPPROTO_UDP alone is not
sufficient for this. Raw sockets can have the same type.
Add a test for sk->sk_type.
Fixes: eb4cb008529c ("sock_diag: define destruction multicast groups")
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking fix from Thomas Gleixner:
"A single fix to address a race in the static key logic"
* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
locking/static_key: Fix concurrent static_key_slow_inc()
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Merge misc fixes from Andrew Morton:
"Two weeks worth of fixes here"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (41 commits)
init/main.c: fix initcall_blacklisted on ia64, ppc64 and parisc64
autofs: don't get stuck in a loop if vfs_write() returns an error
mm/page_owner: avoid null pointer dereference
tools/vm/slabinfo: fix spelling mistake: "Ocurrences" -> "Occurrences"
fs/nilfs2: fix potential underflow in call to crc32_le
oom, suspend: fix oom_reaper vs. oom_killer_disable race
ocfs2: disable BUG assertions in reading blocks
mm, compaction: abort free scanner if split fails
mm: prevent KASAN false positives in kmemleak
mm/hugetlb: clear compound_mapcount when freeing gigantic pages
mm/swap.c: flush lru pvecs on compound page arrival
memcg: css_alloc should return an ERR_PTR value on error
memcg: mem_cgroup_migrate() may be called with irq disabled
hugetlb: fix nr_pmds accounting with shared page tables
Revert "mm: disable fault around on emulated access bit architecture"
Revert "mm: make faultaround produce old ptes"
mailmap: add Boris Brezillon's email
mailmap: add Antoine Tenart's email
mm, sl[au]b: add __GFP_ATOMIC to the GFP reclaim mask
mm: mempool: kasan: don't poot mempool objects in quarantine
...
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git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
Pull rdma fixes from Doug Ledford:
"This is the second batch of queued up rdma patches for this rc cycle.
There isn't anything really major in here. It's passed 0day,
linux-next, and local testing across a wide variety of hardware.
There are still a few known issues to be tracked down, but this should
amount to the vast majority of the rdma RC fixes.
Round two of 4.7 rc fixes:
- A couple minor fixes to the rdma core
- Multiple minor fixes to hfi1
- Multiple minor fixes to mlx4/mlx4
- A few minor fixes to i40iw"
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (31 commits)
IB/srpt: Reduce QP buffer size
i40iw: Enable level-1 PBL for fast memory registration
i40iw: Return correct max_fast_reg_page_list_len
i40iw: Correct status check on i40iw_get_pble
i40iw: Correct CQ arming
IB/rdmavt: Correct qp_priv_alloc() return value test
IB/hfi1: Don't zero out qp->s_ack_queue in rvt_reset_qp
IB/hfi1: Fix deadlock with txreq allocation slow path
IB/mlx4: Prevent cross page boundary allocation
IB/mlx4: Fix memory leak if QP creation failed
IB/mlx4: Verify port number in flow steering create flow
IB/mlx4: Fix error flow when sending mads under SRIOV
IB/mlx4: Fix the SQ size of an RC QP
IB/mlx5: Fix wrong naming of port_rcv_data counter
IB/mlx5: Fix post send fence logic
IB/uverbs: Initialize ib_qp_init_attr with zeros
IB/core: Fix false search of the IB_SA_WELL_KNOWN_GUID
IB/core: Fix RoCE v1 multicast join logic issue
IB/core: Fix no default GIDs when netdevice reregisters
IB/hfi1: Send a pkey change event on driver pkey update
...
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This reverts commit 5c0a85fad949212b3e059692deecdeed74ae7ec7.
The commit causes ~6% regression in unixbench.
Let's revert it for now and consider other solution for reclaim problem
later.
Link: http://lkml.kernel.org/r/1465893750-44080-2-git-send-email-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reported-by: "Huang, Ying" <ying.huang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Vinayak Menon <vinmenon@codeaurora.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Currently we may put reserved by mempool elements into quarantine via
kasan_kfree(). This is totally wrong since quarantine may really free
these objects. So when mempool will try to use such element,
use-after-free will happen. Or mempool may decide that it no longer
need that element and double-free it.
So don't put object into quarantine in kasan_kfree(), just poison it.
Rename kasan_kfree() to kasan_poison_kfree() to respect that.
Also, we shouldn't use kasan_slab_alloc()/kasan_krealloc() in
kasan_unpoison_element() because those functions may update allocation
stacktrace. This would be wrong for the most of the remove_element call
sites.
(The only call site where we may want to update alloc stacktrace is
in mempool_alloc(). Kmemleak solves this by calling
kmemleak_update_trace(), so we could make something like that too.
But this is out of scope of this patch).
Fixes: 55834c59098d ("mm: kasan: initial memory quarantine implementation")
Link: http://lkml.kernel.org/r/575977C3.1010905@virtuozzo.com
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Reported-by: Kuthonuzo Luruo <kuthonuzo.luruo@hpe.com>
Acked-by: Alexander Potapenko <glider@google.com>
Cc: Dmitriy Vyukov <dvyukov@google.com>
Cc: Kostya Serebryany <kcc@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The INIT_TASK() initializer was similarly confused about the stack vs
thread_info allocation that the allocators had, and that were fixed in
commit b235beea9e99 ("Clarify naming of thread info/stack allocators").
The task ->stack pointer only incidentally ends up having the same value
as the thread_info, and in fact that will change.
So fix the initial task struct initializer to point to 'init_stack'
instead of 'init_thread_info', and make sure the ia64 definition for
that exists.
This actually makes the ia64 tsk->stack pointer be sensible for the
initial task, but not for any other task. As mentioned in commit
b235beea9e99, that whole pointer isn't actually used on ia64, since
task_stack_page() there just points to the (single) allocation.
All the other architectures seem to have copied the 'init_stack'
definition, even if it tended to be generally unusued.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The HOSTPC extension registers found in some EHCI implementations form
a variable-length array, with one element for each port. Therefore
the hostpc field in struct ehci_regs should be declared as a
zero-length array, not a single-element array.
This fixes a problem reported by UBSAN.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-by: Wilfried Klaebe <linux-kernel@lebenslange-mailadresse.de>
Tested-by: Wilfried Klaebe <linux-kernel@lebenslange-mailadresse.de>
CC: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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We've had the thread info allocated together with the thread stack for
most architectures for a long time (since the thread_info was split off
from the task struct), but that is about to change.
But the patches that move the thread info to be off-stack (and a part of
the task struct instead) made it clear how confused the allocator and
freeing functions are.
Because the common case was that we share an allocation with the thread
stack and the thread_info, the two pointers were identical. That
identity then meant that we would have things like
ti = alloc_thread_info_node(tsk, node);
...
tsk->stack = ti;
which certainly _worked_ (since stack and thread_info have the same
value), but is rather confusing: why are we assigning a thread_info to
the stack? And if we move the thread_info away, the "confusing" code
just gets to be entirely bogus.
So remove all this confusion, and make it clear that we are doing the
stack allocation by renaming and clarifying the function names to be
about the stack. The fact that the thread_info then shares the
allocation is an implementation detail, and not really about the
allocation itself.
This is a pure renaming and type fix: we pass in the same pointer, it's
just that we clarify what the pointer means.
The ia64 code that actually only has one single allocation (for all of
task_struct, thread_info and kernel thread stack) now looks a bit odd,
but since "tsk->stack" is actually not even used there, that oddity
doesn't matter. It would be a separate thing to clean that up, I
intentionally left the ia64 changes as a pure brute-force renaming and
type change.
Acked-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The following scenario is possible:
CPU 1 CPU 2
static_key_slow_inc()
atomic_inc_not_zero()
-> key.enabled == 0, no increment
jump_label_lock()
atomic_inc_return()
-> key.enabled == 1 now
static_key_slow_inc()
atomic_inc_not_zero()
-> key.enabled == 1, inc to 2
return
** static key is wrong!
jump_label_update()
jump_label_unlock()
Testing the static key at the point marked by (**) will follow the
wrong path for jumps that have not been patched yet. This can
actually happen when creating many KVM virtual machines with userspace
LAPIC emulation; just run several copies of the following program:
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <linux/kvm.h>
int main(void)
{
for (;;) {
int kvmfd = open("/dev/kvm", O_RDONLY);
int vmfd = ioctl(kvmfd, KVM_CREATE_VM, 0);
close(ioctl(vmfd, KVM_CREATE_VCPU, 1));
close(vmfd);
close(kvmfd);
}
return 0;
}
Every KVM_CREATE_VCPU ioctl will attempt a static_key_slow_inc() call.
The static key's purpose is to skip NULL pointer checks and indeed one
of the processes eventually dereferences NULL.
As explained in the commit that introduced the bug:
706249c222f6 ("locking/static_keys: Rework update logic")
jump_label_update() needs key.enabled to be true. The solution adopted
here is to temporarily make key.enabled == -1, and use go down the
slow path when key.enabled <= 0.
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: <stable@vger.kernel.org> # v4.3+
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 706249c222f6 ("locking/static_keys: Rework update logic")
Link: http://lkml.kernel.org/r/1466527937-69798-1-git-send-email-pbonzini@redhat.com
[ Small stylistic edits to the changelog and the code. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Commit 5ec803edcb70 ("pwm: Add core infrastructure to allow atomic
updates"), implemented pwm_disable() as a wrapper around
pwm_apply_state(), and then, commit ef2bf4997f7d ("pwm: Improve args
checking in pwm_apply_state()") added missing checks on the ->period
value in pwm_apply_state() to ensure we were not passing inappropriate
values to the ->config() or ->apply() methods.
The conjunction of these 2 commits led to a case where pwm_disable()
was no longer succeeding, thus preventing the polarity setting done
in pwm_apply_args().
Set a valid period in pwm_apply_args() to ensure polarity setting
won't be rejected.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Suggested-by: Brian Norris <briannorris@chromium.org>
Fixes: 5ec803edcb70 ("pwm: Add core infrastructure to allow atomic updates")
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
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If the caller specified IB_SEND_FENCE in the send flags of the work
request and no previous work request stated that the successive one
should be fenced, the work request would be executed without a fence.
This could result in RDMA read or atomic operations failure due to a MR
being invalidated. Fix this by adding the mlx5 enumeration for fencing
RDMA/atomic operations and fix the logic to apply this.
Fixes: e126ba97dba9 ('mlx5: Add driver for Mellanox Connect-IB adapters')
Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
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This allows a clean shutdown, even if some netdev clients do not
release their reference from this netdev. It is enough to release
the HW resources only as the kernel is shutting down.
Fixes: 2ba5fbd62b25 ('net/mlx4_core: Handle AER flow properly')
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs fixes from Al Viro:
"A couple more of d_walk()/d_subdirs reordering fixes (stable fodder;
ought to solve that crap for good) and a fix for a brown paperbag bug
in d_alloc_parallel() (this cycle)"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
fix idiotic braino in d_alloc_parallel()
autofs races
much milder d_walk() race
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Several user APIs can cause driver to perform an inner-reload.
Currently, doing this would cause the HW/FW statistics of the
adapter to reset, which isn't the expected behavior [statistics
should only reset on explicit unloads].
Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are a bunch (65) of USB fixes for 4.7-rc4. Sorry about the
quantity, I've been slow in getting these out.
The majority are the "normal" gadget, musb, and xhci fixes, that we
all are used to. There are also a few other tiny fixes resolving a
number of reported issues that showed up in 4.7-rc1.
All of these have been in linux-next"
* tag 'usb-4.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (65 commits)
usbip: rate limit get_frame_number message
usb: musb: sunxi: Remove bogus "Frees glue" comment
usb: musb: sunxi: Fix NULL ptr deref when gadget is registered before musb
usb: echi-hcd: Add ehci_setup check before echi_shutdown
usb: host: ehci-msm: Conditionally call ehci suspend/resume
MAINTAINERS: Add file patterns for usb device tree bindings
usb: host: ehci-tegra: Avoid getting the same reset twice
usb: host: ehci-tegra: Grab the correct UTMI pads reset
USB: mos7720: delete parport
USB: OHCI: Don't mark EDs as ED_OPER if scheduling fails
phy: ti-pipe3: Program the DPLL even if it was already locked
usb: musb: Stop bulk endpoint while queue is rotated
usb: musb: Ensure rx reinit occurs for shared_fifo endpoints
usb: musb: host: correct cppi dma channel for isoch transfer
usb: musb: only restore devctl when session was set in backup
usb: phy: Check initial state for twl6030
usb: musb: Use normal module_init for 2430 glue
usb: musb: Remove pm_runtime_set_irq_safe
usb: musb: Remove extra PM runtime calls from 2430 glue layer
usb: musb: Return error value from musb_mailbox
...
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull IIO and staging fixes from Greg KH:
"Here are a number of IIO and staging bugfixes for 4.7-rc4.
Nothing huge, the normal amount of iio driver fixes, and some small
staging driver bugfixes for some reported problems (2 are reverts of
patches that went into 4.7-rc1). All have been in linux-next with no
reported issues"
* tag 'staging-4.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (24 commits)
Revert "Staging: rtl8188eu: rtw_efuse: Use sizeof type *pointer instead of sizeof type."
Revert "Staging: drivers: rtl8188eu: use sizeof(*ptr) instead of sizeof(struct)"
staging: lustre: lnet: Don't access NULL NI on failure path
iio: hudmidity: hdc100x: fix incorrect shifting and scaling
iio: light apds9960: Add the missing dev.parent
iio: Fix error handling in iio_trigger_attach_poll_func
iio: st_sensors: Disable DRDY at init time
iio: st_sensors: Init trigger before irq request
iio: st_sensors: switch to a threaded interrupt
iio: light: bh1780: assign a static name
iio: bh1780: dereference the client properly
iio: humidity: hdc100x: fix IIO_TEMP channel reporting
iio:st_pressure: fix sampling gains (bring inline with ABI)
iio: proximity: as3935: fix buffer stack trashing
iio: proximity: as3935: remove triggered buffer processing
iio: proximity: as3935: correct IIO_CHAN_INFO_RAW output
max44000: Remove scale from proximity
iio: humidity: am2315: Remove a stray unlock
iio: humidity: hdc100x: correct humidity integration time mask
iio: pressure: bmp280: fix error message for wrong chip id
...
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core fixes from Greg KH:
"Here are a small number of debugfs, ISA, and one driver core fix for
4.7-rc4.
All of these resolve reported issues. The ISA ones have spent the
least amount of time in linux-next, sorry about that, I didn't realize
they were regressions that needed to get in now (thanks to Thorsten
for the prodding!) but they do all pass the 0-day bot tests. The
others have been in linux-next for a while now.
Full details about them are in the shortlog below"
* tag 'driver-core-4.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
isa: Dummy isa_register_driver should return error code
isa: Call isa_bus_init before dependent ISA bus drivers register
watchdog: ebc-c384_wdt: Allow build for X86_64
iio: stx104: Allow build for X86_64
gpio: Allow PC/104 devices on X86_64
isa: Allow ISA-style drivers on modern systems
base: make module_create_drivers_dir race-free
debugfs: open_proxy_open(): avoid double fops release
debugfs: full_proxy_open(): free proxy on ->open() failure
kernel/kcov: unproxify debugfs file's fops
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The inline isa_register_driver stub simply allows compilation on systems
with CONFIG_ISA disabled; the dummy isa_register_driver does not
register an isa_driver at all. The inline isa_register_driver should
return -ENODEV to indicate lack of support when attempting to register
an isa_driver on such a system with CONFIG_ISA disabled.
Cc: Matthew Wilcox <matthew@wil.cx>
Reported-by: Sasha Levin <sasha.levin@oracle.com>
Tested-by: Ye Xiaolong
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Several modern devices, such as PC/104 cards, are expected to run on
modern systems via an ISA bus interface. Since ISA is a legacy interface
for most modern architectures, ISA support should remain disabled in
general. Support for ISA-style drivers should be enabled on a per driver
basis.
To allow ISA-style drivers on modern systems, this patch introduces the
ISA_BUS_API and ISA_BUS Kconfig options. The ISA bus driver will now
build conditionally on the ISA_BUS_API Kconfig option, which defaults to
the legacy ISA Kconfig option. The ISA_BUS Kconfig option allows the
ISA_BUS_API Kconfig option to be selected on architectures which do not
enable ISA (e.g. X86_64).
The ISA_BUS Kconfig option is currently only implemented for X86
architectures. Other architectures may have their own ISA_BUS Kconfig
options added as required.
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds
Pull LED fixes from Jacek Anaszewski:
- Fix brightness setting upon hardware blinking enabled
- Handle suspend/resume in heartbeat trigger
* tag 'for-4.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds:
leds: handle suspend/resume in heartbeat trigger
leds: core: Fix brightness setting upon hardware blinking enabled
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git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
Pull pwm fixes from Thierry Reding:
"These changes fix a bit of fallout from the introduction of the atomic
API"
* tag 'pwm/for-4.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm:
pwm: atmel-hlcdc: Fix default PWM polarity
pwm: sysfs: Get return value from pwm_apply_state()
pwm: Improve args checking in pwm_apply_state()
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Pull nfsd bugfixes from Bruce Fields:
"Oleg Drokin found and fixed races in the nfsd4 state code that go back
to the big nfs4_lock_state removal around 3.17 (but that were also
probably hard to reproduce before client changes in 3.20 allowed the
client to perform parallel opens).
Also fix a 4.1 backchannel crash due to rpc multipath changes in 4.6.
Trond acked the client-side rpc fixes going through my tree"
* tag 'nfsd-4.7-1' of git://linux-nfs.org/~bfields/linux:
nfsd: Make init_open_stateid() a bit more whole
nfsd: Extend the mutex holding region around in nfsd4_process_open2()
nfsd: Always lock state exclusively.
rpc: share one xps between all backchannels
nfsd4/rpc: move backchannel create logic into rpc code
SUNRPC: fix xprt leak on xps allocation failure
nfsd: Fix NFSD_MDS_PR_KEY on 32-bit by adding ULL postfix
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git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
Pull overlayfs fixes from Miklos Szeredi:
"This contains two regression fixes: one for the xattr API update and
one for using the mounter's creds in file creation in overlayfs.
There's also a fix for a bug in handling hard linked AF_UNIX sockets
that's been there from day one. This fix is overlayfs only despite
the fact that it touches code outside the overlay filesystem: d_real()
is an identity function for all except overlay dentries"
* 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
ovl: fix uid/gid when creating over whiteout
ovl: xattr filter fix
af_unix: fix hard linked sockets on overlay
vfs: add d_real_inode() helper
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The ctx structure passed into bpf programs is different depending on bpf
program type. The verifier incorrectly marked ctx->data and ctx->data_end
access based on ctx offset only. That caused loads in tracing programs
int bpf_prog(struct pt_regs *ctx) { .. ctx->ax .. }
to be incorrectly marked as PTR_TO_PACKET which later caused verifier
to reject the program that was actually valid in tracing context.
Fix this by doing program type specific matching of ctx offsets.
Fixes: 969bf05eb3ce ("bpf: direct packet access")
Reported-by: Sasha Goldshtein <goldshtn@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The implementation of net_dbg_ratelimited in the CONFIG_DYNAMIC_DEBUG
case was added with 2c94b5373 ("net: Implement net_dbg_ratelimited() for
CONFIG_DYNAMIC_DEBUG case"). The implementation strategy was to take the
usual definition of the dynamic_pr_debug macro, but alter it by adding a
call to "net_ratelimit()" in the if statement. This is, in fact, the
correct approach.
However, while doing this, the author of the commit forgot to surround
fmt by pr_fmt, resulting in unprefixed log messages appearing in the
console. So, this commit adds back the pr_fmt(fmt) invocation, making
net_dbg_ratelimited properly consistent across DEBUG, no DEBUG, and
DYNAMIC_DEBUG cases, and bringing parity with the behavior of
dynamic_pr_debug as well.
Fixes: 2c94b5373 ("net: Implement net_dbg_ratelimited() for CONFIG_DYNAMIC_DEBUG case")
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Cc: Tim Bingham <tbingham@akamai.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The spec allows backchannels for multiple clients to share the same tcp
connection. When that happens, we need to use the same xprt for all of
them. Similarly, we need the same xps.
This fixes list corruption introduced by the multipath code.
Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Acked-by: Trond Myklebust <trondmy@primarydata.com>
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Also simplify the logic a bit.
Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Acked-by: Trond Myklebust <trondmy@primarydata.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux
Pull thermal management fixes from Zhang Rui:
- fix an ordering issue in cpu cooling that cooling device is
registered before it's ready (freq_table being populated).
(Lukasz Luba)
- fix a missing comment update (Caesar Wang)
* 'for-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
thermal: add the note for set_trip_temp
thermal: cpu_cooling: fix improper order during initialization
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git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull DeviceTree fixes from Rob Herring:
- fix unflatten_dt_nodes when dad parameter is set.
- add vendor prefixes for TechNexion and UniWest
- documentation fix for Marvell BT
- OF IRQ kerneldoc fixes
- restrict CMA alignment adjustments to non dma-coherent
- a couple of warning fixes in reserved-memory code
- DT maintainers updates
* tag 'devicetree-fixes-for-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
drivers: of: add definition of early_init_dt_alloc_reserved_memory_arch
drivers/of: Fix depth for sub-tree blob in unflatten_dt_nodes()
drivers: of: Fix of_pci.h header guard
dt-bindings: Add vendor prefix for TechNexion
of: add vendor prefix for UniWest
dt: bindings: fix documentation for MARVELL's bt-sd8xxx wireless device
of: add missing const for of_parse_phandle_with_args() in !CONFIG_OF
of: silence warnings due to max() usage
drivers: of: of_reserved_mem: fixup the CMA alignment not to affect dma-coherent
of: irq: fix of_irq_get[_byname]() kernel-doc
MAINTAINERS: DeviceTree maintainer updates
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