Hugh Dickins [Thu, 5 May 2016 23:22:09 +0000 (16:22 -0700)]
huge pagecache: mmap_sem is unlocked when truncation splits pmd
zap_pmd_range()'s CONFIG_DEBUG_VM !rwsem_is_locked(&mmap_sem) BUG() will
be invalid with huge pagecache, in whatever way it is implemented:
truncation of a hugely-mapped file to an unhugely-aligned size would
easily hit it.
(Although anon THP could in principle apply khugepaged to private file
mappings, which are not excluded by the MADV_HUGEPAGE restrictions, in
practice there's a vm_ops check which excludes them, so it never hits
this BUG() - there's no interface to "truncate" an anonymous mapping.)
We could complicate the test, to check i_mmap_rwsem also when there's a
vm_file; but my inclination was to make zap_pmd_range() more readable by
simply deleting this check. A search has shown no report of the issue
in the years since commit e0897d75f0b2 ("mm, thp: print useful
information when mmap_sem is unlocked in zap_pmd_range") expanded it
from VM_BUG_ON() - though I cannot point to what commit I would say then
fixed the issue.
But there are a couple of other patches now floating around, neither yet
in the tree: let's agree to retain the check as a VM_BUG_ON_VMA(), as
Matthew Wilcox has done; but subject to a vma_is_anonymous() check, as
Kirill Shutemov has done. And let's get this in, without waiting for
any particular huge pagecache implementation to reach the tree.
Matthew said "We can reproduce this BUG() in the current Linus tree with
DAX PMDs".
Signed-off-by: Hugh Dickins <hughd@google.com> Tested-by: Matthew Wilcox <willy@linux.intel.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Andres Lagar-Cavilla <andreslc@google.com> Cc: Yang Shi <yang.shi@linaro.org> Cc: Ning Qu <quning@gmail.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Andres Lagar-Cavilla <andreslc@google.com> Cc: Konstantin Khlebnikov <koct9i@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix problems in uapi definitions reported by Gabriel Laskar: (see
https://lkml.org/lkml/2016/4/5/205 for details)
- move public header file rio_mport_cdev.h to include/uapi/linux directory
- change types in data structures passed as IOCTL parameters
- improve parameter checking in some IOCTL service routines
Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com> Reported-by: Gabriel Laskar <gabriel@lse.epita.fr> Tested-by: Barry Wood <barry.wood@idt.com> Cc: Gabriel Laskar <gabriel@lse.epita.fr> Cc: Matt Porter <mporter@kernel.crashing.org> Cc: Aurelien Jacquiot <a-jacquiot@ti.com> Cc: Andre van Herk <andre.van.herk@prodrive-technologies.com> Cc: Barry Wood <barry.wood@idt.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Johannes Weiner [Thu, 5 May 2016 23:22:03 +0000 (16:22 -0700)]
mm: memcontrol: let v2 cgroups follow changes in system swappiness
Cgroup2 currently doesn't have a per-cgroup swappiness setting. We
might want to add one later - that's a different discussion - but until
we do, the cgroups should always follow the system setting. Otherwise
it will be unchangeably set to whatever the ancestor inherited from the
system setting at the time of cgroup creation.
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Vladimir Davydov <vdavydov@virtuozzo.com> Cc: <stable@vger.kernel.org> [4.5] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This oops happens with the namespace_sem held and can be triggered by
non-root users. An all around not pleasant experience.
To avoid this scenario when finding the appropriate source mount to
copy stop the walk up the mnt_master chain when the first source mount
is encountered.
Further rewrite the walk up the last_source mnt_master chain so that
it is clear what is going on.
The reason why the first source mount is special is that it it's
mnt_parent is not a mount in the dest_mnt propagation tree, and as
such termination conditions based up on the dest_mnt mount propgation
tree do not make sense.
To avoid other kinds of confusion last_dest is not changed when
computing last_source. last_dest is only used once in propagate_one
and that is above the point of the code being modified, so changing
the global variable is meaningless and confusing.
Linus Torvalds [Wed, 4 May 2016 18:14:00 +0000 (11:14 -0700)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
Pull IMA fix from James Morris.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
ima: fix the string representation of the LSM/IMA hook enumeration ordering
Linus Torvalds [Wed, 4 May 2016 18:00:05 +0000 (11:00 -0700)]
Merge tag 'for-linus-4.6-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen regression fixes from David Vrabel:
- Fix two regressions causing crashes in 32-bit PV guests
- Fix a regression in the evtchn driver
* tag 'for-linus-4.6-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen/evtchn: fix ring resize when binding new events
xen/balloon: Fix crash when ballooning on x86 32 bit PAE
xen: Fix page <-> pfn conversion on 32 bit systems
Jan Beulich [Wed, 4 May 2016 13:02:36 +0000 (07:02 -0600)]
xen/evtchn: fix ring resize when binding new events
The copying of ring data was wrong for two cases: For a full ring
nothing got copied at all (as in that case the canonicalized producer
and consumer indexes are identical). And in case one or both of the
canonicalized (after the resize) indexes would point into the second
half of the buffer, the copied data ended up in the wrong (free) part
of the new buffer. In both cases uninitialized data would get passed
back to the caller.
Fix this by simply copying the old ring contents twice: Once to the
low half of the new buffer, and a second time to the high half.
This addresses the inability to boot a HVM guest with 64 or more
vCPUs. This regression was caused by 8620015499101090 (xen/evtchn:
dynamically grow pending event channel ring).
Reported-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Jan Beulich <jbeulich@suse.com> Cc: <stable@vger.kernel.org> # 4.4+ Signed-off-by: David Vrabel <david.vrabel@citrix.com>
ima: fix the string representation of the LSM/IMA hook enumeration ordering
This patch fixes the string representation of the LSM/IMA hook enumeration
ordering used for displaying the IMA policy.
Fixes: d9ddf077bb85 ("ima: support for kexec image and initramfs") Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com> Tested-by: Eric Richter <erichte@linux.vnet.ibm.com> Signed-off-by: James Morris <james.l.morris@oracle.com>
Linus Torvalds [Wed, 4 May 2016 01:02:38 +0000 (18:02 -0700)]
Merge tag 'trace-fixes-v4.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fix from Steven Rostedt:
"Chunyu Hu noticed that if one writes into the trigger files within the
ftrace subsystem of events that it can cause an oops. This file is
only writable by root, but still is a bug that needs to be fixed"
* tag 'trace-fixes-v4.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing: Don't display trigger file for events that can't be enabled
Pull networking fixes from David Miller:
"Some straggler bug fixes:
1) Batman-adv DAT must consider VLAN IDs when choosing candidate
nodes, from Antonio Quartulli.
2) Fix botched reference counting of vlan objects and neigh nodes in
batman-adv, from Sven Eckelmann.
3) netem can crash when it sees GSO packets, the fix is to segment
then upon ->enqueue. Fix from Neil Horman with help from Eric
Dumazet.
4) Fix VXLAN dependencies in mlx5 driver Kconfig, from Matthew
Finlay.
5) Handle VXLAN ops outside of rcu lock, via a workqueue, in mlx5,
since it can sleep. Fix also from Matthew Finlay.
6) Check mdiobus_scan() return values properly in pxa168_eth and macb
drivers. From Sergei Shtylyov.
7) If the netdevice doesn't support checksumming, disable
segmentation. From Alexandery Duyck.
8) Fix races between RDS tcp accept and sending, from Sowmini
Varadhan.
9) In macb driver, probe MDIO bus before we register the netdev,
otherwise we can try to open the device before it is really ready
for that. Fix from Florian Fainelli.
10) Netlink attribute size for ILA "tunnels" not calculated properly,
fix from Nicolas Dichtel"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
ipv6/ila: fix nlsize calculation for lwtunnel
net: macb: Probe MDIO bus before registering netdev
RDS: TCP: Synchronize accept() and connect() paths on t_conn_lock.
RDS:TCP: Synchronize rds_tcp_accept_one with rds_send_xmit when resetting t_sock
vxlan: Add checksum check to the features check function
net: Disable segmentation if checksumming is not supported
net: mvneta: Remove superfluous SMP function call
macb: fix mdiobus_scan() error check
pxa168_eth: fix mdiobus_scan() error check
net/mlx5e: Use workqueue for vxlan ops
net/mlx5e: Implement a mlx5e workqueue
net/mlx5: Kconfig: Fix MLX5_EN/VXLAN build issue
net/mlx5: Unmap only the relevant IO memory mapping
netem: Segment GSO packets on enqueue
batman-adv: Fix reference counting of hardif_neigh_node object for neigh_node
batman-adv: Fix reference counting of vlan object for tt_local_entry
batman-adv: B.A.T.M.A.N V - make sure iface is reactivated upon NETDEV_UP event
batman-adv: fix DAT candidate selection (must use vid)
Linus Torvalds [Tue, 3 May 2016 21:23:58 +0000 (14:23 -0700)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse
Pull fuse fixes from Miklos Szeredi:
"Fix a regression and update the MAINTAINERS entry for fuse"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
fuse: update mailing list in MAINTAINERS
fuse: Fix return value from fuse_get_user_pages()
Nicolas Dichtel [Tue, 3 May 2016 07:58:27 +0000 (09:58 +0200)]
ipv6/ila: fix nlsize calculation for lwtunnel
The handler 'ila_fill_encap_info' adds one attribute: ILA_ATTR_LOCATOR.
Fixes: 65d7ab8de582 ("net: Identifier Locator Addressing module") CC: Tom Herbert <tom@herbertland.com> Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
net: macb: Probe MDIO bus before registering netdev
The current sequence makes us register for a network device prior to
registering and probing the MDIO bus which could lead to some unwanted
consequences, like a thread of execution calling into ndo_open before
register_netdev() returns, while the MDIO bus is not ready yet.
Rework the sequence to register for the MDIO bus, and therefore attach
to a PHY prior to calling register_netdev(), which implies reworking the
error path a bit.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Tue, 3 May 2016 20:03:45 +0000 (16:03 -0400)]
Merge branch 'rds-fixes'
Sowmini Varadhan says:
====================
RDS: TCP: sychronization during connection startup
This patch series ensures that the passive (accept) side of the
TCP connection used for RDS-TCP is correctly synchronized with
any concurrent active (connect) attempts for a given pair of peers.
Patch 1 in the series makes sure that the t_sock in struct
rds_tcp_connection is only reset after any threads in rds_tcp_xmit
have completed (otherwise a null-ptr deref may be encountered).
Patch 2 synchronizes rds_tcp_accept_one() with the rds_tcp*connect()
path.
v2: review comments from Santosh Shilimkar, other spelling corrections
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
RDS: TCP: Synchronize accept() and connect() paths on t_conn_lock.
An arbitration scheme for duelling SYNs is implemented as part of
commit 241b271952eb ("RDS-TCP: Reset tcp callbacks if re-using an
outgoing socket in rds_tcp_accept_one()") which ensures that both nodes
involved will arrive at the same arbitration decision. However, this
needs to be synchronized with an outgoing SYN to be generated by
rds_tcp_conn_connect(). This commit achieves the synchronization
through the t_conn_lock mutex in struct rds_tcp_connection.
The rds_conn_state is checked in rds_tcp_conn_connect() after acquiring
the t_conn_lock mutex. A SYN is sent out only if the RDS connection is
not already UP (an UP would indicate that rds_tcp_accept_one() has
completed 3WH, so no SYN needs to be generated).
Similarly, the rds_conn_state is checked in rds_tcp_accept_one() after
acquiring the t_conn_lock mutex. The only acceptable states (to
allow continuation of the arbitration logic) are UP (i.e., outgoing SYN
was SYN-ACKed by peer after it sent us the SYN) or CONNECTING (we sent
outgoing SYN before we saw incoming SYN).
Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
RDS:TCP: Synchronize rds_tcp_accept_one with rds_send_xmit when resetting t_sock
There is a race condition between rds_send_xmit -> rds_tcp_xmit
and the code that deals with resolution of duelling syns added
by commit 241b271952eb ("RDS-TCP: Reset tcp callbacks if re-using an
outgoing socket in rds_tcp_accept_one()").
Specifically, we may end up derefencing a null pointer in rds_send_xmit
if we have the interleaving sequence:
rds_tcp_accept_one rds_send_xmit
The race condition can be avoided without adding the overhead of
additional locking in the xmit path: have rds_tcp_accept_one wait
for rds_tcp_xmit threads to complete before resetting callbacks.
The synchronization can be done in the same manner as rds_conn_shutdown().
First set the rds_conn_state to something other than RDS_CONN_UP
(so that new threads cannot get into rds_tcp_xmit()), then wait for
RDS_IN_XMIT to be cleared in the conn->c_flags indicating that any
threads in rds_tcp_xmit are done.
Fixes: 241b271952eb ("RDS-TCP: Reset tcp callbacks if re-using an
outgoing socket in rds_tcp_accept_one()") Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Tue, 3 May 2016 20:00:55 +0000 (16:00 -0400)]
Merge branch 'tunnel-csum-and-sg-offloads'
Alexander Duyck says:
====================
Fixes for tunnel checksum and segmentation offloads
This patch series is a subset of patches I had submitted for net-next. I
plan to drop these two patches from the v3 of "Fix Tunnel features and
enable GSO partial for several drivers" and I am instead submitting them
for net since these are truly fixes and likely will need to be backported
to stable branches.
This series addresses 2 specific issues. The first is that we could
request TSO on a v4 inner header while not supporting checksum offload of
the outer IPv6 header. The second is that we could request an IPv6 inner
checksum offload without validating that we could actually support an inner
IPv6 checksum offload.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Alexander Duyck [Mon, 2 May 2016 16:25:16 +0000 (09:25 -0700)]
vxlan: Add checksum check to the features check function
We need to perform an additional check on the inner headers to determine if
we can offload the checksum for them. Previously this check didn't occur
so we would generate an invalid frame in the case of an IPv6 header
encapsulated inside of an IPv4 tunnel. To fix this I added a secondary
check to vxlan_features_check so that we can verify that we can offload the
inner checksum.
Signed-off-by: Alexander Duyck <aduyck@mirantis.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Alexander Duyck [Mon, 2 May 2016 16:25:10 +0000 (09:25 -0700)]
net: Disable segmentation if checksumming is not supported
In the case of the mlx4 and mlx5 driver they do not support IPv6 checksum
offload for tunnels. With this being the case we should disable GSO in
addition to the checksum offload features when we find that a device cannot
perform a checksum on a given packet type.
Signed-off-by: Alexander Duyck <aduyck@mirantis.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Since commit 3b9d6da67e11 ("cpu/hotplug: Fix rollback during error-out
in __cpu_disable()") it is ensured that callbacks of CPU_ONLINE and
CPU_DOWN_PREPARE are processed on the hotplugged CPU. Due to this SMP
function calls are no longer required.
Replace smp_call_function_single() with a direct call to
mvneta_percpu_enable() or mvneta_percpu_disable(). The functions do
not require to be called with interrupts disabled, therefore the
smp_call_function_single() calling convention is not preserved.
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Cc: netdev@vger.kernel.org Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Sergei Shtylyov [Sat, 30 Apr 2016 22:47:36 +0000 (01:47 +0300)]
macb: fix mdiobus_scan() error check
Now mdiobus_scan() returns ERR_PTR(-ENODEV) instead of NULL if the PHY
device ID was read as all ones. As this was not an error before, this
value should be filtered out now in this driver.
Fixes: b74766a0a0fe ("phylib: don't return NULL from get_phy_device()") Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Sergei Shtylyov [Sat, 30 Apr 2016 20:35:11 +0000 (23:35 +0300)]
pxa168_eth: fix mdiobus_scan() error check
Since mdiobus_scan() returns either an error code or NULL on error, the
driver should check for both, not only for NULL, otherwise a crash is
imminent...
Reported-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Tue, 3 May 2016 18:06:01 +0000 (11:06 -0700)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
Pull HID fixes from Jiri Kosina:
"Fixes for the HID subsystem:
- regression fix for Wacom driver; commit introduced in 4.6-rc1
mistakenly removed line that should be kept. Fix by Ping Cheng
- two device-specific quirks, by Ping Cheng and Nazar Mokrynskyi"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid:
HID: wacom: add missed stylus_in_proximity line back
HID: Fix boot delay for Creative SB Omni Surround 5.1 with quirk
HID: wacom: Add support for DTK-1651
Linus Torvalds [Tue, 3 May 2016 17:58:29 +0000 (10:58 -0700)]
Merge tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
Pull clk fix from Stephen Boyd:
"One small bug fix for the imx6qp CAN clk definition that was causing
failures and division by zeros in the kernel on those devices"
* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
clk: imx6q: fix typo in CAN clock definition
David S. Miller [Tue, 3 May 2016 17:37:27 +0000 (13:37 -0400)]
Merge branch 'mlx5-fixes'
Saeed Mahameed says:
====================
Mellanox 100G mlx5 fixes for 4.6-rc
This small series provides some bug fixes for mlx5 driver.
A small bug fix for iounmap of a null pointer, which dumps a warning on some archs.
One patch to fix the VXLAN/MLX5_EN dependency issue reported by Arnd.
Two patches to fix the scheduling while atomic issue for ndo_add/del_vxlan_port
NDOs. The first will add an internal mlx5e workqueue and the second will
delegate vxlan ports add/del requests to that workqueue.
Note: ('net/mlx5: Kconfig: Fix MLX5_EN/VXLAN build issue') is only needed for net
and not net-next as the issue was globally fixed for all device drivers by: b7aade15485a ('vxlan: break dependency with netdev drivers') in net-next.
Applied on top: f27337e16f2d ('ip_tunnel: fix preempt warning in ip tunnel creation/updating')
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Matthew Finlay [Sun, 1 May 2016 19:59:57 +0000 (22:59 +0300)]
net/mlx5e: Use workqueue for vxlan ops
The vxlan add/delete port NDOs are called under rcu lock.
The current mlx5e implementation can potentially block in these
calls, which is not allowed. Move to using the mlx5e workqueue
to handle these NDOs.
Fixes: b3f63c3d5e2c ('net/mlx5e: Add netdev support for VXLAN tunneling') Signed-off-by: Matthew Finlay <matt@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Matthew Finlay [Sun, 1 May 2016 19:59:56 +0000 (22:59 +0300)]
net/mlx5e: Implement a mlx5e workqueue
Implement a mlx5e workqueue to handle all mlx5e specific tasks. Move
all tasks currently using the system workqueue to the new workqueue.
This is in preparation for vxlan using the mlx5e workqueue in order to
schedule port add/remove operations.
Signed-off-by: Matthew Finlay <matt@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Matthew Finlay [Sun, 1 May 2016 19:59:55 +0000 (22:59 +0300)]
net/mlx5: Kconfig: Fix MLX5_EN/VXLAN build issue
When MLX5_EN=y MLX5_CORE=y and VXLAN=m there is a linker error for
vxlan_get_rx_port() due to the fact that VXLAN is a module. Change Kconfig
to select VXLAN when MLX5_CORE=y. When MLX5_CORE=m there is no dependency
on the value of VXLAN.
Fixes: b3f63c3d5e2c ('net/mlx5e: Add netdev support for VXLAN tunneling') Signed-off-by: Matthew Finlay <matt@mellanox.com> Reported-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Gal Pressman [Sun, 1 May 2016 19:59:54 +0000 (22:59 +0300)]
net/mlx5: Unmap only the relevant IO memory mapping
When freeing UAR the driver tries to unmap uar->map and uar->bf_map
which are mutually exclusive thus always unmapping a NULL pointer.
Make sure we only call iounmap() once, for the actual mapping.
Fixes: 0ba422410bbf ('net/mlx5: Fix global UAR mapping') Signed-off-by: Gal Pressman <galp@mellanox.com> Reported-by: Doron Tsur <doront@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Chunyu Hu [Tue, 3 May 2016 11:34:34 +0000 (19:34 +0800)]
tracing: Don't display trigger file for events that can't be enabled
Currently register functions for events will be called
through the 'reg' field of event class directly without
any check when seting up triggers.
Triggers for events that don't support register through
debug fs (events under events/ftrace are for trace-cmd to
read event format, and most of them don't have a register
function except events/ftrace/functionx) can't be enabled
at all, and an oops will be hit when setting up trigger
for those events, so just not creating them is an easy way
to avoid the oops.
Ping Cheng [Tue, 3 May 2016 04:17:34 +0000 (21:17 -0700)]
HID: wacom: add missed stylus_in_proximity line back
Commit 7e12978 ("HID: wacom: break out wacom_intuos_get_tool_type") by accident
removed stylus_in_proximity flag for Intuos series while shuffling the code
around.
Fix that by reintroducing that flag setting in wacom_intuos_inout(), where
it originally was.
Neil Horman [Mon, 2 May 2016 16:20:15 +0000 (12:20 -0400)]
netem: Segment GSO packets on enqueue
This was recently reported to me, and reproduced on the latest net kernel,
when attempting to run netperf from a host that had a netem qdisc attached
to the egress interface:
The problem occurs because netem is not prepared to handle GSO packets (as it
uses skb_checksum_help in its enqueue path, which cannot manipulate these
frames).
The solution I think is to simply segment the skb in a simmilar fashion to the
way we do in __dev_queue_xmit (via validate_xmit_skb), with some minor changes.
When we decide to corrupt an skb, if the frame is GSO, we segment it, corrupt
the first segment, and enqueue the remaining ones.
tested successfully by myself on the latest net kernel, to which this applies
Signed-off-by: Neil Horman <nhorman@tuxdriver.com> CC: Jamal Hadi Salim <jhs@mojatatu.com> CC: "David S. Miller" <davem@davemloft.net> CC: netem@lists.linux-foundation.org CC: eric.dumazet@gmail.com CC: stephen@networkplumber.org Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Tue, 3 May 2016 04:17:38 +0000 (00:17 -0400)]
Merge tag 'batman-adv-fix-for-davem' of git://git.open-mesh.org/linux-merge
Antonio Quartulli says:
====================
In this small batch of patches you have:
- a fix for our Distributed ARP Table that makes sure that the input
provided to the hash function during a query is the same as the one
provided during an insert (so to prevent false negatives), by Antonio
Quartulli
- a fix for our new protocol implementation B.A.T.M.A.N. V that ensures
that a hard interface is properly re-activated when it is brought down
and then up again, by Antonio Quartulli
- two fixes respectively to the reference counting of the tt_local_entry
and neigh_node objects, by Sven Eckelmann. Such bug is rather severe
as it would prevent the netdev objects references by batman-adv from
being released after shutdown.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Mon, 2 May 2016 19:46:42 +0000 (12:46 -0700)]
Minimal fix-up of bad hashing behavior of hash_64()
This is a fairly minimal fixup to the horribly bad behavior of hash_64()
with certain input patterns.
In particular, because the multiplicative value used for the 64-bit hash
was intentionally bit-sparse (so that the multiply could be done with
shifts and adds on architectures without hardware multipliers), some
bits did not get spread out very much. In particular, certain fairly
common bit ranges in the input (roughly bits 12-20: commonly with the
most information in them when you hash things like byte offsets in files
or memory that have block factors that mean that the low bits are often
zero) would not necessarily show up much in the result.
There's a bigger patch-series brewing to fix up things more completely,
but this is the fairly minimal fix for the 64-bit hashing problem. It
simply picks a much better constant multiplier, spreading the bits out a
lot better.
NOTE! For 32-bit architectures, the bad old hash_64() remains the same
for now, since 64-bit multiplies are expensive. The bigger hashing
cleanup will replace the 32-bit case with something better.
The new constants were picked by George Spelvin who wrote that bigger
cleanup series. I just picked out the constants and part of the comment
from that series.
Cc: stable@vger.kernel.org Cc: George Spelvin <linux@horizon.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Mon, 2 May 2016 19:22:51 +0000 (12:22 -0700)]
Merge tag 'md/4.6-rc6-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md
Pull MD fixes from Shaohua Li:
"This update includes several trival fixes. The only important one is
to fix MD bio merge, which has big performance impact"
* tag 'md/4.6-rc6-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
raid5: delete unnecessary warnning
MD: make bio mergeable
md/raid0: remove empty line printk from dump_zones
md/raid0: fix uninitialized variable bug
Linus Torvalds [Mon, 2 May 2016 16:54:22 +0000 (09:54 -0700)]
Merge tag 'gpio-v4.6-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO fixes from Linus Walleij:
"Here are some late but important fixes for the v4.6 kernel series.
ACPI and RCAR, so two driver fixes (PM related) and a self-evident
string lookup fix for ACPI GPIOs:
- A serious ACPI fix targeted for stable: lookup strings were being
free'd.
- Revert two patches from the RCAR driver"
* tag 'gpio-v4.6-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
gpiolib-acpi: Duplicate con_id string when adding it to the crs lookup list
Revert "gpio: rcar: Fine-grained Runtime PM support"
Revert "gpio: rcar: Add Runtime PM handling for interrupts"
1) MODULE_FIRMWARE firmware string not correct for iwlwifi 8000 chips,
from Sara Sharon.
2) Fix SKB size checks in batman-adv stack on receive, from Sven
Eckelmann.
3) Leak fix on mac80211 interface add error paths, from Johannes Berg.
4) Cannot invoke napi_disable() with BH disabled in myri10ge driver,
fix from Stanislaw Gruszka.
5) Fix sign extension problem when computing feature masks in
net_gso_ok(), from Marcelo Ricardo Leitner.
6) lan78xx driver doesn't count packets and packet lengths in its
statistics properly, fix from Woojung Huh.
7) Fix the buffer allocation sizes in pegasus USB driver, from Petko
Manolov.
8) Fix refcount overflows in bpf, from Alexei Starovoitov.
9) Unified dst cache handling introduced a preempt warning in
ip_tunnel, fix by resetting rather then setting the cached route.
From Paolo Abeni.
10) Listener hash collision test fix in soreuseport, from Craig Gallak
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (47 commits)
gre: do not pull header in ICMP error processing
net: Implement net_dbg_ratelimited() for CONFIG_DYNAMIC_DEBUG case
tipc: only process unicast on intended node
cxgb3: fix out of bounds read
net/smscx5xx: use the device tree for mac address
soreuseport: Fix TCP listener hash collision
net: l2tp: fix reversed udp6 checksum flags
ip_tunnel: fix preempt warning in ip tunnel creation/updating
samples/bpf: fix trace_output example
bpf: fix check_map_func_compatibility logic
bpf: fix refcnt overflow
drivers: net: cpsw: use of_phy_connect() in fixed-link case
dt: cpsw: phy-handle, phy_id, and fixed-link are mutually exclusive
drivers: net: cpsw: don't ignore phy-mode if phy-handle is used
drivers: net: cpsw: fix segfault in case of bad phy-handle
drivers: net: cpsw: fix parsing of phy-handle DT property in dual_emac config
MAINTAINERS: net: Change maintainer for GRETH 10/100/1G Ethernet MAC device driver
gre: reject GUE and FOU in collect metadata mode
pegasus: fixes reported packet length
pegasus: fixes URB buffer allocation size;
...
3) Allow proper auto-loading of VIO devices, from John Paul Adrian
Glaubitz.
4) Recognize Sonoma cpus, from Khalid Aziz.
5) Fix bootup regressions caused by syscall trace fixes made recently.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
sparc64: Fix bootup regressions on some Kconfig combinations.
sparc64: recognize and support Sonoma CPU type
sparc: Implement and wire up vio_hotplug for vio.
sparc: Implement and wire up modalias_show for vio.
sparc/pci: Refactor dev_archdata initialization into pci_init_dev_archdata
sparc/defconfigs: Remove CONFIG_IPV6_PRIVACY
sparc: Write up preadv2/pwritev2 syscalls.
sparc/PCI: Fix for panic while enabling SR-IOV
iptunnel_pull_header expects that IP header was already pulled; with this
expectation, it pulls the tunnel header. This is not true in gre_err.
Furthermore, ipv4_update_pmtu and ipv4_redirect expect that skb->data points
to the IP header.
We cannot pull the tunnel header in this path. It's just a matter of not
calling iptunnel_pull_header - we don't need any of its effects.
Fixes: bda7bb463436 ("gre: Allow multiple protocol listener for gre protocol.") Signed-off-by: Jiri Benc <jbenc@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Tim Bingham [Fri, 29 Apr 2016 17:30:23 +0000 (13:30 -0400)]
net: Implement net_dbg_ratelimited() for CONFIG_DYNAMIC_DEBUG case
Prior to commit d92cff89a0c8 ("net_dbg_ratelimited: turn into no-op
when !DEBUG") the implementation of net_dbg_ratelimited() was buggy
for both the DEBUG and CONFIG_DYNAMIC_DEBUG cases.
The bug was that net_ratelimit() was being called and, despite
returning true, nothing was being printed to the console. This
resulted in messages like the following -
"net_ratelimit: %d callbacks suppressed"
with no other output nearby.
After commit d92cff89a0c8 ("net_dbg_ratelimited: turn into no-op when
!DEBUG") the bug is fixed for the DEBUG case. However, there's no
output at all for CONFIG_DYNAMIC_DEBUG case.
This patch restores debug output (if enabled) for the
CONFIG_DYNAMIC_DEBUG case.
Add a definition of net_dbg_ratelimited() for the CONFIG_DYNAMIC_DEBUG
case. The implementation takes care to check that dynamic debugging is
enabled before calling net_ratelimit().
Fixes: d92cff89a0c8 ("net_dbg_ratelimited: turn into no-op when !DEBUG") Signed-off-by: Tim Bingham <tbingham@akamai.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Hamish Martin [Fri, 29 Apr 2016 14:40:24 +0000 (10:40 -0400)]
tipc: only process unicast on intended node
We have observed complete lock up of broadcast-link transmission due to
unacknowledged packets never being removed from the 'transmq' queue. This
is traced to nodes having their ack field set beyond the sequence number
of packets that have actually been transmitted to them.
Consider an example where node 1 has sent 10 packets to node 2 on a
link and node 3 has sent 20 packets to node 2 on another link. We
see examples of an ack from node 2 destined for node 3 being treated as
an ack from node 2 at node 1. This leads to the ack on the node 1 to node
2 link being increased to 20 even though we have only sent 10 packets.
When node 1 does get around to sending further packets, none of the
packets with sequence numbers less than 21 are actually removed from the
transmq.
To resolve this we reinstate some code lost in commit d999297c3dbb ("tipc:
reduce locking scope during packet reception") which ensures that only
messages destined for the receiving node are processed by that node. This
prevents the sequence numbers from getting out of sync and resolves the
packet leakage, thereby resolving the broadcast-link transmission
lock-ups we observed.
While we are aware that this change only patches over a root problem that
we still haven't identified, this is a sanity test that it is always
legitimate to do. It will remain in the code even after we identify and
fix the real problem.
Reviewed-by: Chris Packham <chris.packham@alliedtelesis.co.nz> Reviewed-by: John Thompson <john.thompson@alliedtelesis.co.nz> Signed-off-by: Hamish Martin <hamish.martin@alliedtelesis.co.nz> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Michal Schmidt [Fri, 29 Apr 2016 09:06:50 +0000 (11:06 +0200)]
cxgb3: fix out of bounds read
An out of bounds read of 2 bytes was discovered in cxgb3 with KASAN.
t3_config_rss() expects both arrays it gets as parameters to have
terminators. setup_rss(), the caller, forgets to add a terminator to
one of the arrays. Thankfully the iteration in t3_config_rss() stops
anyway, but in the last iteration the check for the terminator
is an out of bounds read.
Add the missing terminator to rspq_map[].
Reported-by: Jan Stancek <jstancek@redhat.com> Signed-off-by: Michal Schmidt <mschmidt@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This takes the MAC address for smsc75xx/smsc95xx USB network devices
from a the device tree. This is required to get a usable persistent
address on the popular beagleboard, whose hardware designers
accidentally forgot that an ethernet device really requires an a
MAC address to be functional.
The Raspberry Pi also ships smsc9514 without a serial EEPROM, stores
the MAC address in ROM accessible via VC4 firmware.
The smsc75xx and smsc95xx drivers are just two copies of the
same code, so better fix both.
[lkundrak@v3.sk: updated to use of_get_property() as per suggestion from
Arnd, reworded the message and comments a bit]
Tested-by: Lubomir Rintel <lkundrak@v3.sk> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Lubomir Rintel <lkundrak@v3.sk> Signed-off-by: David S. Miller <davem@davemloft.net>
I forgot to include a check for listener port equality when deciding
if two sockets should belong to the same reuseport group. This was
not caught previously because it's only necessary when two listening
sockets for the same user happen to hash to the same listener bucket.
The same error does not exist in the UDP path.
Fixes: c125e80b8868("soreuseport: fast reuseport TCP socket selection") Signed-off-by: Craig Gallek <kraig@google.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Wang Shanker [Thu, 28 Apr 2016 17:29:43 +0000 (01:29 +0800)]
net: l2tp: fix reversed udp6 checksum flags
This patch fixes a bug which causes the behavior of whether to ignore
udp6 checksum of udp6 encapsulated l2tp tunnel contrary to what
userspace program requests.
When the flag `L2TP_ATTR_UDP_ZERO_CSUM6_RX` is set by userspace, it is
expected that udp6 checksums of received packets of the l2tp tunnel
to create should be ignored. In `l2tp_netlink.c`:
`l2tp_nl_cmd_tunnel_create()`, `cfg.udp6_zero_rx_checksums` is set
according to the flag, and then passed to `l2tp_core.c`:
`l2tp_tunnel_create()` and then `l2tp_tunnel_sock_create()`. In
`l2tp_tunnel_sock_create()`, `udp_conf.use_udp6_rx_checksums` is set
the same to `cfg.udp6_zero_rx_checksums`. However, if we want the
checksum to be ignored, `udp_conf.use_udp6_rx_checksums` should be set
to `false`, i.e. be set to the contrary. Similarly, the same should be
done to `udp_conf.use_udp6_tx_checksums`.
Signed-off-by: Miao Wang <shankerwangmiao@gmail.com> Acked-by: James Chapman <jchapman@katalix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Dan Carpenter [Fri, 15 Apr 2016 14:45:10 +0000 (17:45 +0300)]
virtio: Silence uninitialized variable warning
Smatch complains that we might not initialize "queue". The issue is
callers like setup_vq() from virtio_pci_modern.c where "num" could be
something like 2 and "vring_align" is 64. In that case, vring_size() is
less than PAGE_SIZE. It won't happen in real life, but we're getting
the value of "num" from a register so it's not really possible to tell
what value it holds with static analysis.
Let's just silence the warning.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Linus Torvalds [Sun, 1 May 2016 01:57:42 +0000 (18:57 -0700)]
Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal
Pull thermal fixes from Eduardo Valentin:
"A couple of minor fixes for the thermal subsystem.
Specifics in this pull request:
- Fixes in hisilicon thermal driver
- More fixes of unsigned to int type change in thermal_core.c"
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal:
thermal: use %d to print S32 parameters
thermal: hisilicon: increase temperature resolution
Ville Syrjälä [Mon, 25 Apr 2016 13:01:19 +0000 (16:01 +0300)]
gpiolib-acpi: Duplicate con_id string when adding it to the crs lookup list
Calling gpiod_get() from a module and then unloading the module leads to an
oops due to acpi_can_fallback_to_crs() storing the pointer to the passed
'con_id' string onto acpi_crs_lookup_list. The next guy to come along will then
try to access the string but the memory may now be gone with the module.
Make a copy of the passed string instead, and store the copy on the list.
Merge tag 'powerpc-4.6-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"A few more powerpc fixes for 4.6:
- cxl: Keep IRQ mappings on context teardown from Michael Neuling
- cxl: Poll for outstanding IRQs when detaching a context from
Michael Neuling
- Wire up preadv2 and pwritev2 syscalls from Rui Salvaterra"
* tag 'powerpc-4.6-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc: wire up preadv2 and pwritev2 syscalls
cxl: Poll for outstanding IRQs when detaching a context
cxl: Keep IRQ mappings on context teardown
Merge tag 'edac_fix_for_4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp
Pull EDAC fix from Borislav Petkov:
"Make sure sb_edac and i7core_edac do not terminate MCE processing on
the decoding callchain prematurely"
* tag 'edac_fix_for_4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp:
EDAC: i7core, sb_edac: Don't return NOTIFY_BAD from mce_decoder callback
Merge tag 'pm+acpi-4.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"One revert of a recent cpufreq commit that introduced a regression and
a fix for intel_pstate's Turbo Activation Ratio handling code.
Specifics:
- Revert cpufreq commit that attempted to fix a problem in the
ondemand/conservative governor code, but did that incorrectly and
introduced another problem instead (Rafael Wysocki).
- Fix incorrect decoding of MSR contents related to the Turbo
Activation Ratio (TAR) handling in the intel_pstate driver
(Srinivas Pandruvada)"
* tag 'pm+acpi-4.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpufreq: intel_pstate: Fix processing for turbo activation ratio
Revert "cpufreq: governor: Fix negative idle_time when configured with CONFIG_HZ_PERIODIC"
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
"A few fixes all over the place:
radeon is probably the biggest standout, it's a fix for screen
corruption or hung black outputs so I thought it was worth pulling in.
Otherwise some amdgpu power control fixes, some misc vmwgfx fixes, one
etnaviv fix, one virtio-gpu fix, two DP MST fixes, and a single TTM
fix"
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
drm/vmwgfx: Fix order of operation
drm/vmwgfx: use vmw_cmd_dx_cid_check for query commands.
drm/vmwgfx: Enable SVGA_3D_CMD_DX_SET_PREDICATION
drm/amdgpu: disable vm interrupts with vm_fault_stop=2
drm/amdgpu: print a message if ATPX dGPU power control is missing
Revert "drm/amdgpu: disable runtime pm on PX laptops without dGPU power control"
drm/radeon: fix vertical bars appear on monitor (v2)
drm/ttm: fix kref count mess in ttm_bo_move_to_lru_tail
drm/virtio: send vblank event after crtc updates
drm/dp/mst: Restore primary hub guid on resume
drm/dp/mst: Get validated port ref in drm_dp_update_payload_part1()
drm/etnaviv: don't move linear memory window on 3D cores without MC2.0
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
Pull rdma fixes from Doug Ledford:
"Final set of -rc fixes for 4.6.
I've collected up a number of patches that are all pretty small with
the exception of only a couple. The hfi1 driver has a number of
important patches, and it is what really drives the line count of this
pull request up. These are all small and I've got this kernel built
and running in the test lab (I have most of the hardware, I think nes
is the only thing in this patch set that I can't say I've personally
tested and have up and running).
Summary:
- A number of collected fixes for oopses, memory corruptions,
deadlocks, etc. All of these fixes are small (many only 5-10
lines), obvious, and tested.
- Fix for the security issue related to the use of write for
bi-directional communications"
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma:
RDMA/nes: don't leak skb if carrier down
IB/security: Restrict use of the write() interface
IB/hfi1: Use kernel default llseek for ui device
IB/hfi1: Don't attempt to free resources if initialization failed
IB/hfi1: Fix missing lock/unlock in verbs drain callback
IB/rdmavt: Fix send scheduling
IB/hfi1: Prevent unpinning of wrong pages
IB/hfi1: Fix deadlock caused by locking with wrong scope
IB/hfi1: Prevent NULL pointer deferences in caching code
MAINTAINERS: Update iser/isert maintainer contact info
IB/mlx5: Expose correct max_sge_rd limit
RDMA/iw_cxgb4: Fix bar2 virt addr calculation for T4 chips
iw_cxgb4: handle draining an idle qp
iw_cxgb3: initialize ibdev.iwcm->ifname for port mapping
iw_cxgb4: initialize ibdev.iwcm->ifname for port mapping
IB/core: Don't drain non-existent rq queue-pair
IB/core: Fix oops in ib_cache_gid_set_default_gid
Shaohua Li [Fri, 29 Apr 2016 21:18:03 +0000 (14:18 -0700)]
raid5: delete unnecessary warnning
If device has R5_LOCKED set, it's legit device has R5_SkipCopy set and page !=
orig_page. After R5_LOCKED is clear, handle_stripe_clean_event will clear the
SkipCopy flag and set page to orig_page. So the warning is unnecessary.
Reported-by: Joey Liao <joeyliao@qnap.com> Signed-off-by: Shaohua Li <shli@fb.com>
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
Documentation/sysctl/vm.txt: update numa_zonelist_order description
lib/stackdepot.c: allow the stack trace hash to be zero
rapidio: fix potential NULL pointer dereference
mm/memory-failure: fix race with compound page split/merge
ocfs2/dlm: return zero if deref_done message is successfully handled
Ananth has moved
kcov: don't profile branches in kcov
kcov: don't trace the code coverage code
mm: wake kcompactd before kswapd's short sleep
.mailmap: add Frank Rowand
mm/hwpoison: fix wrong num_poisoned_pages accounting
mm: call swap_slot_free_notify() with page lock held
mm: vmscan: reclaim highmem zone if buffer_heads is over limit
numa: fix /proc/<pid>/numa_maps for THP
mm/huge_memory: replace VM_NO_THP VM_BUG_ON with actual VMA check
mailmap: fix Krzysztof Kozlowski's misspelled name
thp: keep huge zero page pinned until tlb flush
mm: exclude HugeTLB pages from THP page_mapped() logic
kexec: export OFFSET(page.compound_head) to find out compound tail page
kexec: update VMCOREINFO for compound_order/dtor
Paolo Abeni [Thu, 28 Apr 2016 09:04:51 +0000 (11:04 +0200)]
ip_tunnel: fix preempt warning in ip tunnel creation/updating
After the commit e09acddf873b ("ip_tunnel: replace dst_cache with generic
implementation"), a preemption debug warning is triggered on ip4
tunnels updating; the dst cache helper needs to be invoked in unpreemptible
context.
We don't need to load the cache on tunnel update, so this commit fixes
the warning replacing the load with a dst cache reset, which is
preempt safe.
Fixes: e09acddf873b ("ip_tunnel: replace dst_cache with generic implementation") Reported-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Tony Luck [Fri, 29 Apr 2016 13:42:25 +0000 (15:42 +0200)]
EDAC: i7core, sb_edac: Don't return NOTIFY_BAD from mce_decoder callback
Both of these drivers can return NOTIFY_BAD, but this terminates
processing other callbacks that were registered later on the chain.
Since the driver did nothing to log the error it seems wrong to prevent
other interested parties from seeing it. E.g. neither of them had even
bothered to check the type of the error to see if it was a memory error
before the return NOTIFY_BAD.
* pm-cpufreq-fixes:
cpufreq: intel_pstate: Fix processing for turbo activation ratio
Revert "cpufreq: governor: Fix negative idle_time when configured with CONFIG_HZ_PERIODIC"
Sven Eckelmann [Fri, 11 Mar 2016 15:44:06 +0000 (16:44 +0100)]
batman-adv: Fix reference counting of hardif_neigh_node object for neigh_node
The batadv_neigh_node was specific to a batadv_hardif_neigh_node and held
an implicit reference to it. But this reference was never stored in form of
a pointer in the batadv_neigh_node itself. Instead
batadv_neigh_node_release depends on a consistent state of
hard_iface->neigh_list and that batadv_hardif_neigh_get always returns the
batadv_hardif_neigh_node object which it has a reference for. But
batadv_hardif_neigh_get cannot guarantee that because it is working only
with rcu_read_lock on this list. It can therefore happen that a neigh_addr
is in this list twice or that batadv_hardif_neigh_get cannot find the
batadv_hardif_neigh_node for an neigh_addr due to some other list
operations taking place at the same time.
Instead add a batadv_hardif_neigh_node pointer directly in
batadv_neigh_node which will be used for the reference counter decremented
on release of batadv_neigh_node.
Fixes: cef63419f7db ("batman-adv: add list of unique single hop neighbors per hard-interface") Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Antonio Quartulli <a@unstable.cc>
Sven Eckelmann [Fri, 11 Mar 2016 15:44:05 +0000 (16:44 +0100)]
batman-adv: Fix reference counting of vlan object for tt_local_entry
The batadv_tt_local_entry was specific to a batadv_softif_vlan and held an
implicit reference to it. But this reference was never stored in form of a
pointer in the tt_local_entry itself. Instead batadv_tt_local_remove,
batadv_tt_local_table_free and batadv_tt_local_purge_pending_clients depend
on a consistent state of bat_priv->softif_vlan_list and that
batadv_softif_vlan_get always returns the batadv_softif_vlan object which
it has a reference for. But batadv_softif_vlan_get cannot guarantee that
because it is working only with rcu_read_lock on this list. It can
therefore happen that an vid is in this list twice or that
batadv_softif_vlan_get cannot find the batadv_softif_vlan for an vid due to
some other list operations taking place at the same time.
Instead add a batadv_softif_vlan pointer directly in batadv_tt_local_entry
which will be used for the reference counter decremented on release of
batadv_tt_local_entry.
Fixes: 35df3b298fc8 ("batman-adv: fix TT VLAN inconsistency on VLAN re-add") Signed-off-by: Sven Eckelmann <sven@narfation.org> Acked-by: Antonio Quartulli <a@unstable.cc> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Antonio Quartulli <a@unstable.cc>
batman-adv: B.A.T.M.A.N V - make sure iface is reactivated upon NETDEV_UP event
At the moment there is no explicit reactivation of an hard-interface
upon NETDEV_UP event. In case of B.A.T.M.A.N. IV the interface is
reactivated as soon as the next OGM is scheduled for sending, but this
mechanism does not work with B.A.T.M.A.N. V. The latter does not rely
on the same scheduling mechanism as its predecessor and for this reason
the hard-interface remains deactivated forever after being brought down
once.
This patch fixes the reactivation mechanism by adding a new routing API
which explicitly allows each algorithm to perform any needed operation
upon interface re-activation.
Such API is optional and is implemented by B.A.T.M.A.N. V only and it
just takes care of setting the iface status to ACTIVE
Signed-off-by: Antonio Quartulli <a@unstable.cc> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
batman-adv: fix DAT candidate selection (must use vid)
Now that DAT is VLAN aware, it must use the VID when
computing the DHT address of the candidate nodes where
an entry is going to be stored/retrieved.
Fixes: be1db4f6615b ("batman-adv: make the Distributed ARP Table vlan aware") Signed-off-by: Antonio Quartulli <a@unstable.cc>
[sven@narfation.org: fix conflicts with current version] Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Dave Airlie [Fri, 29 Apr 2016 04:31:44 +0000 (14:31 +1000)]
Merge branch 'drm-fixes-4.6' of git://people.freedesktop.org/~agd5f/linux into drm-fixes
A few fixes for 4.6.
- revert amdgpu PX commit that was previously reverted on the radeon side
- cleaned up version of the NI+ MC update display fix for radeon
- TTM kref fix
* 'drm-fixes-4.6' of git://people.freedesktop.org/~agd5f/linux:
drm/amdgpu: disable vm interrupts with vm_fault_stop=2
drm/amdgpu: print a message if ATPX dGPU power control is missing
Revert "drm/amdgpu: disable runtime pm on PX laptops without dGPU power control"
drm/radeon: fix vertical bars appear on monitor (v2)
drm/ttm: fix kref count mess in ttm_bo_move_to_lru_tail
Dave Airlie [Fri, 29 Apr 2016 04:27:50 +0000 (14:27 +1000)]
Merge branch 'drm-vmwgfx-fixes' of git://people.freedesktop.org/~syeh/repos_linux into drm-fixes
three misc vmwgfx fixes
* 'drm-vmwgfx-fixes' of git://people.freedesktop.org/~syeh/repos_linux:
drm/vmwgfx: Fix order of operation
drm/vmwgfx: use vmw_cmd_dx_cid_check for query commands.
drm/vmwgfx: Enable SVGA_3D_CMD_DX_SET_PREDICATION
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
"Two boot crash fixes and an IRQ handling crash fix"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/apic: Handle zero vector gracefully in clear_vector_irq()
Revert "x86/mm/32: Set NX in __supported_pte_mask before enabling paging"
xen/qspinlock: Don't kick CPU if IRQ is not initialized
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
"x86 PMU driver fixes plus a core code race fix"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/intel: Fix incorrect lbr_sel_mask value
perf/x86/intel/pt: Don't die on VMXON
perf/core: Fix perf_event_open() vs. execve() race
perf/x86/amd: Set the size of event map array to PERF_COUNT_HW_MAX
perf/core: Make sysctl_perf_cpu_time_max_percent conform to documentation
perf/x86/intel/rapl: Add missing Haswell model
perf/x86/intel: Add model number for Skylake Server to perf
Merge tag 'sound-4.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"Usually we get a big collection of fixes for ASoC once during rc. And
this is it.
At this time, most of fixes are about Intel Skylake ASoC driver, which
is a new and still on-going development. Along with it, a slight
large LOC is seen in legacy HD-audio driver, but it's merely a code
move to the upper layer.
Other than that, the rest are small or trivial fixes to various
drivers, in addition to an ASoC dapm debugfs code fix"
* tag 'sound-4.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (24 commits)
ALSA: hda - Update BCLK also at hotplug for i915 HSW/BDW
ALSA: hda - Add dock support for ThinkPad X260
ASoC: wm5102: Free compressed IRQ in CODEC remove
ASoC: arizona: Free speaker thermal IRQs in CODEC remove
ASoC: Intel: Skylake: Fix ibs/obs calc for non-integral sampling rates
ASoC: Intel: sst: fix a loop timeout in sst_hsw_stream_reset()
ASoC: Intel: Skylake: Fix to turn OFF codec power when entering S3
ASoC: hdac_hdmi: Fix codec power state in S3 during playback
ASoC: hdac_hdmi: Fix to use dev_pm ops instead soc pm
ASoC: wm8962: Correct typo when setting DSPCLK rate
ASoC: nau8825: Fix jack detection across suspend
ASoC: Intel: Skylake: Fix DSP resource de-allocation
ASoC: Intel: Skylake: Fix for unloading module only when it is loaded
ASoC: Intel: Skylake: Fix kbuild dependency
ASoC: dapm: Make sure we have a card when displaying component widgets
ASoC: rt5640: Correct the digital interface data select
ASoC: Intel: Skylake: remove call to pci_dev_put
ASoC: Intel: Skylake: Call i915 exit last
ASoC: Intel: Skylake: Unmap the address last
ASoC: Intel: Skylake: Freeup properly on skl_dsp_free
...
Commit 3193913ce62c ("mm: page_alloc: default node-ordering on 64-bit
NUMA, zone-ordering on 32-bit") changes the default value of
numa_zonelist_order. Update the document.
Signed-off-by: Xishi Qiu <qiuxishi@huawei.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Rik van Riel <riel@redhat.com> Cc: David Rientjes <rientjes@google.com> Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
lib/stackdepot.c: allow the stack trace hash to be zero
Do not bail out from depot_save_stack() if the stack trace has zero hash.
Initially depot_save_stack() silently dropped stack traces with zero
hashes, however there's actually no point in reserving this zero value.
Reported-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Alexander Potapenko <glider@google.com> Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The change fixes improper check for a returned error value by
class_create() function, which on error returns ERR_PTR() value, thus the
original check always results in a dead code on error path.
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com> Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
James Morse [Thu, 28 Apr 2016 23:18:52 +0000 (16:18 -0700)]
kcov: don't trace the code coverage code
Kcov causes the compiler to add a call to __sanitizer_cov_trace_pc() in
every basic block. Ftrace patches in a call to _mcount() to each
function it has annotated.
Letting these mechanisms annotate each other is a bad thing. Break the
loop by adding 'notrace' to __sanitizer_cov_trace_pc() so that ftrace
won't try to patch this code.
This patch lets arm64 with KCOV and STACK_TRACER boot.
Signed-off-by: James Morse <james.morse@arm.com> Acked-by: Dmitry Vyukov <dvyukov@google.com> Cc: Alexander Potapenko <glider@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
When kswapd goes to sleep it checks if the node is balanced and at first
it sleeps only for HZ/10 time, then rechecks if the node is still
balanced and nobody has woken it during the initial sleep. Only then it
goes fully sleep until an allocation slowpath wakes it up again.
For higher-order allocations, waking up kcompactd is done only before
the full sleep. This turns out to be an issue in case another
high-order allocation fails during the initial sleep. It will wake
kswapd up, however kswapd considers the zone balanced from the order-0
perspective, and will just quickly try to sleep again. So if there's a
longer stream of high-order allocations hitting the slowpath and waking
up kswapd, it might never actually wake up kcompactd, which may be
considered a regression from kswapd-based compaction. In the worst
case, it might be that a single allocation that cannot direct
reclaim/compact itself is waking kswapd in the retry loop and preventing
kcompactd from being woken up and unblocking it.
This patch makes sure kcompactd is woken up in such situations by simply
moving the wakeup before the short initial sleep. More efficient
solution would be to wake kcompactd immediately instead of kswapd if the
node is already order-0 balanced, but in that case we should also move
reset_isolation_suitable() call to kcompactd so it's not adding to the
allocator's latency. Since it's late in the 4.6 cycle, let's go with
the simpler change for now.
Fixes: accf62422b3a ("mm, kswapd: replace kswapd compaction with waking up kcompactd") Signed-off-by: Vlastimil Babka <vbabka@suse.cz> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Rik van Riel <riel@redhat.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: David Rientjes <rientjes@google.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Currently, migration code increses num_poisoned_pages on *failed*
migration page as well as successfully migrated one at the trial of
memory-failure. It will make the stat wrong. As well, it marks the
page as PG_HWPoison even if the migration trial failed. It would mean
we cannot recover the corrupted page using memory-failure facility.
Minchan Kim [Thu, 28 Apr 2016 23:18:41 +0000 (16:18 -0700)]
mm: call swap_slot_free_notify() with page lock held
Kyeongdon reported below error which is BUG_ON(!PageSwapCache(page)) in
page_swap_info. The reason is that page_endio in rw_page unlocks the
page if read I/O is completed so we need to hold a PG_lock again to
check PageSwapCache. Otherwise, the page can be removed from swapcache.
Kernel BUG at c00f9040 [verbose debug info unavailable]
Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 4 PID: 13446 Comm: RenderThread Tainted: G W 3.10.84-g9f14aec-dirty #73
task: c3b73200 ti: dd192000 task.ti: dd192000
PC is at page_swap_info+0x10/0x2c
LR is at swap_slot_free_notify+0x18/0x6c
pc : [<c00f9040>] lr : [<c00f5560>] psr: 400f0113
sp : dd193d78 ip : c2deb1e4 fp : da015180
r10: 00000000 r9 : 000200da r8 : c120fe08
r7 : 00000000 r6 : 00000000 r5 : c249a6c0 r4 : = c249a6c0
r3 : 00000000 r2 : 40080009 r1 : 200f0113 r0 : = c249a6c0
..<snip> ..
Call Trace:
page_swap_info+0x10/0x2c
swap_slot_free_notify+0x18/0x6c
swap_readpage+0x90/0x11c
read_swap_cache_async+0x134/0x1ac
swapin_readahead+0x70/0xb0
handle_pte_fault+0x320/0x6fc
handle_mm_fault+0xc0/0xf0
do_page_fault+0x11c/0x36c
do_DataAbort+0x34/0x118
Fixes: 3f2b1a04f44933f2 ("zram: revive swap_slot_free_notify") Signed-off-by: Minchan Kim <minchan@kernel.org> Tested-by: Kyeongdon Kim <kyeongdon.kim@lge.com> Cc: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Minchan Kim [Thu, 28 Apr 2016 23:18:38 +0000 (16:18 -0700)]
mm: vmscan: reclaim highmem zone if buffer_heads is over limit
We have been reclaimed highmem zone if buffer_heads is over limit but
commit 6b4f7799c6a5 ("mm: vmscan: invoke slab shrinkers from
shrink_zone()") changed the behavior so it doesn't reclaim highmem zone
although buffer_heads is over the limit. This patch restores the logic.
Fixes: 6b4f7799c6a5 ("mm: vmscan: invoke slab shrinkers from shrink_zone()") Signed-off-by: Minchan Kim <minchan@kernel.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
In gather_pte_stats() a THP pmd is cast into a pte, which is wrong
because the layouts may differ depending on the architecture. On s390
this will lead to inaccurate numa_maps accounting in /proc because of
misguided pte_present() and pte_dirty() checks on the fake pte.
On other architectures pte_present() and pte_dirty() may work by chance,
but there may be an issue with direct-access (dax) mappings w/o
underlying struct pages when HAVE_PTE_SPECIAL is set and THP is
available. In vm_normal_page() the fake pte will be checked with
pte_special() and because there is no "special" bit in a pmd, this will
always return false and the VM_PFNMAP | VM_MIXEDMAP checking will be
skipped. On dax mappings w/o struct pages, an invalid struct page
pointer would then be returned that can crash the kernel.
This patch fixes the numa_maps THP handling by introducing new "_pmd"
variants of the can_gather_numa_stats() and vm_normal_page() functions.
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com> Cc: Konstantin Khlebnikov <koct9i@gmail.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Jerome Marchand <jmarchan@redhat.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Michael Holzheu <holzheu@linux.vnet.ibm.com> Cc: <stable@vger.kernel.org> [4.3+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/huge_memory: replace VM_NO_THP VM_BUG_ON with actual VMA check
Khugepaged detects own VMAs by checking vm_file and vm_ops but this way
it cannot distinguish private /dev/zero mappings from other special
mappings like /dev/hpet which has no vm_ops and popultes PTEs in mmap.
This fixes false-positive VM_BUG_ON and prevents installing THP where
they are not expected.
Link: http://lkml.kernel.org/r/CACT4Y+ZmuZMV5CjSFOeXviwQdABAgT7T+StKfTqan9YDtgEi5g@mail.gmail.com Fixes: 78f11a255749 ("mm: thp: fix /dev/zero MAP_PRIVATE and vm_flags cleanups") Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com> Reported-by: Dmitry Vyukov <dvyukov@google.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mailmap: fix Krzysztof Kozlowski's misspelled name
Patchwork introduced a garbled Polish character in commit 1e3012d0fdc5
("crypto: s5p-sss - Use memcpy_toio for iomem annotated memory") so fix
the mail mapping. Additionally prefer to use kernel.org account for
personal work, instead of my gmail address.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Cc: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Andrea has found[1] a race condition on MMU-gather based TLB flush vs
split_huge_page() or shrinker which frees huge zero under us (patch 1/2
and 2/2 respectively).
With new THP refcounting, we don't need patch 1/2: mmu_gather keeps the
page pinned until flush is complete and the pin prevents the page from
being split under us.
We still need patch 2/2. This is simplified version of Andrea's patch.
We don't need fancy encoding.
Steve Capper [Thu, 28 Apr 2016 23:18:24 +0000 (16:18 -0700)]
mm: exclude HugeTLB pages from THP page_mapped() logic
HugeTLB pages cannot be split, so we use the compound_mapcount to track
rmaps.
Currently page_mapped() will check the compound_mapcount, but will also
go through the constituent pages of a THP compound page and query the
individual _mapcount's too.
Unfortunately, page_mapped() does not distinguish between HugeTLB and
THP compound pages and assumes that a compound page always needs to have
HPAGE_PMD_NR pages querying.
For most cases when dealing with HugeTLB this is just inefficient, but
for scenarios where the HugeTLB page size is less than the pmd block
size (e.g. when using contiguous bit on ARM) this can lead to crashes.
This patch adjusts the page_mapped function such that we skip the
unnecessary THP reference checks for HugeTLB pages.
Fixes: e1534ae95004 ("mm: differentiate page_mapped() from page_mapcount() for compound pages") Signed-off-by: Steve Capper <steve.capper@arm.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Ingo Molnar <mingo@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
kexec: export OFFSET(page.compound_head) to find out compound tail page
PageAnon() always look at head page to check PAGE_MAPPING_ANON and tail
page's page->mapping has just a poisoned data since commit 1c290f642101
("mm: sanitize page->mapping for tail pages").
If makedumpfile checks page->mapping of a compound tail page to
distinguish anonymous page as usual, it must fail in newer kernel. So
it's necessary to export OFFSET(page.compound_head) to avoid checking
compound tail pages.
The problem is that unnecessary hugepages won't be removed from a dump
file in kernels 4.5.x and later. This means that extra disk space would
be consumed. It's a problem, but not critical.
Signed-off-by: Atsushi Kumagai <ats-kumagai@wm.jp.nec.com> Acked-by: Dave Young <dyoung@redhat.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
makedumpfile refers page.lru.next to get the order of compound pages for
page filtering.
However, now the order is stored in page.compound_order, hence
VMCOREINFO should be updated to export the offset of
page.compound_order.
The fact is, page.compound_order was introduced already in kernel 4.0,
but the offset of it was the same as page.lru.next until kernel 4.3, so
this was not actual problem.
The above can be said also for page.lru.prev and page.compound_dtor,
it's necessary to detect hugetlbfs pages. Further, the content was
changed from direct address to the ID which means dtor.
The problem is that unnecessary hugepages won't be removed from a dump
file in kernels 4.4.x and later. This means that extra disk space would
be consumed. It's a problem, but not critical.
Signed-off-by: Atsushi Kumagai <ats-kumagai@wm.jp.nec.com> Acked-by: Dave Young <dyoung@redhat.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
Pull Ceph fixes from Sage Weil:
"There is a lifecycle fix in the auth code, a fix for a narrow race
condition on map, and a helpful message in the log when there is a
feature mismatch (which happens frequently now that the default
server-side options have changed)"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
rbd: report unsupported features to syslog
rbd: fix rbd map vs notify races
libceph: make authorizer destruction independent of ceph_auth_client
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 fixes from Martin Schwidefsky:
"Three more bug fixes for 4.6
- Due to a race in the dynamic page table code a multi-threaded
program can cause a translation specification exception. With
panic_on_oops a user space program can crash the system.
- An information leak with the /dev/sclp device.
- A use after free in the s390 PCI code"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/sclp_ctl: fix potential information leak with /dev/sclp
s390/mm: fix asce_bits handling with dynamic pagetable levels
s390/pci: fix use after free in dma_init
projects / karo-tx-linux.git / log