Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

generic_file_direct_write() already does that.  Broken by
"ocfs2: do not fallback to buffer I/O write if appending"

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

If we fail past the aio_setup_ring(), we need to destroy the
mapping.  We don't need to care about anybody having found ctx,
or added requests to it, since the last failure exit is exactly
the failure to make ctx visible to lookups.

Reproducer (based on one by Joe Mario <jmario@redhat.com>):

void count(char *p)
{
	char s[80];
	printf("%s: ", p);
	fflush(stdout);
	sprintf(s, "/bin/cat /proc/%d/maps|/bin/fgrep -c '/[aio] (deleted)'", getpid());
	system(s);
}

int main()
{
	io_context_t *ctx;
	int created, limit, i, destroyed;
	FILE *f;

	count("before");
	if ((f = fopen("/proc/sys/fs/aio-max-nr", "r")) == NULL)
		perror("opening aio-max-nr");
	else if (fscanf(f, "%d", &limit) != 1)
		fprintf(stderr, "can't parse aio-max-nr\n");
	else if ((ctx = calloc(limit, sizeof(io_context_t))) == NULL)
		perror("allocating aio_context_t array");
	else {
		for (i = 0, created = 0; i < limit; i++) {
			if (io_setup(1000, ctx + created) == 0)
				created++;
		}
		for (i = 0, destroyed = 0; i < created; i++)
			if (io_destroy(ctx[i]) == 0)
				destroyed++;
		printf("created %d, failed %d, destroyed %d\n",
			created, limit - created, destroyed);
		count("after");
	}
}

Found-by: Joe Mario <jmario@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

teach ->mremap() method to return an error and have it fail for
aio mappings in process of being killed

Note that in case of ->mremap() failure we need to undo move_page_tables()
we'd already done; we could call ->mremap() first, but then the failure of
move_page_tables() would require undoing whatever _successful_ ->mremap()
has done, which would be a lot more headache in general.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

Pull drm fixes from Dave Airlie:
 "One drm core fix, one exynos regression fix, two sets of radeon fixes
  (Alex was a bit behind last week), and two i915 fixes.

  Nothing too serious we seem to have calmed down i915 since last week"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/radeon: fix wait in radeon_mn_invalidate_range_start
  drm/radeon: add extra check in radeon_ttm_tt_unpin_userptr
  drm: Exynos: Respect framebuffer pitch for FIMD/Mixer
  drm/i915: Reject the colorkey ioctls for primary and cursor planes
  drm/i915: Skip allocating shadow batch for 0-length batches
  drm/radeon: programm the VCE fw BAR as well
  drm/radeon: always dump the ring content if it's available
  radeon: Do not directly dereference pointers to BIOS area.
  drm/radeon/dpm: fix 120hz handling harder
  drm/edid: set ELD for firmware and debugfs override EDIDs

Pull irqchip fixes from Jason Cooper:
 "This is the second round of fixes for irqchip.  It contains some fixes
  found while the arm64 guys were writing the kvm gicv3 its emulation.

  GICv3 ITS:
    - Small batch of fixes discovered while writing the kvm ITS emulation"

* tag 'irqchip-fixes-4.0-2' of git://git.infradead.org/users/jcooper/linux:
  irqchip: gicv3-its: Use non-cacheable accesses when no shareability
  irqchip: gicv3-its: Fix PROP/PEND and BASE/CBASE confusion
  irqchip: gicv3-its: Fix device ID encoding
  irqchip: gicv3-its: Fix encoding of collection's target redistributor

Just two small fixes for radeon, both destined for stable.

* 'drm-fixes-4.0' of git://people.freedesktop.org/~agd5f/linux:
  drm/radeon: fix wait in radeon_mn_invalidate_range_start
  drm/radeon: add extra check in radeon_ttm_tt_unpin_userptr

Merge branch 'exynos-drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos into drm-fixes

Fix display on issue to Exynos5250 based Snow(1366x768) board.

* 'exynos-drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos:
  drm: Exynos: Respect framebuffer pitch for FIMD/Mixer

one oops fixes and a 0-length allocation fix from next backported.

* tag 'drm-intel-fixes-2015-04-02' of git://anongit.freedesktop.org/drm-intel:
  drm/i915: Reject the colorkey ioctls for primary and cursor planes
  drm/i915: Skip allocating shadow batch for 0-length batches

Here's a single drm core fix, cc: stable, that affects i915
users.

* tag 'topic/drm-fixes-2015-04-02' of git://anongit.freedesktop.org/drm-intel:
  drm/edid: set ELD for firmware and debugfs override EDIDs

Pull xen regression fixes from David Vrabel:
 "Fix two regressions in the balloon driver's use of memory hotplug when
  used in a PV guest"

* tag 'stable/for-linus-4.0-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/balloon: before adding hotplugged memory, set frames to invalid
  x86/xen: prepare p2m list for memory hotplug

Pull powerpc fix from Michael Ellerman:
 "Fix memory corruption by pnv_alloc_idle_core_states"

* tag 'powerpc-4.0-4' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux:
  powerpc: fix memory corruption by pnv_alloc_idle_core_states

Pull infiniband/rdma fix from Roland Dreier:
 "Fix for exploitable integer overflow in uverbs interface"

* tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
  IB/uverbs: Prevent integer overflow in ib_umem_get address arithmetic

Pull dmaengine fixes from Vinod Koul:
 "This time we have addition of caps for jz4740 which fixes intentional
  warning at boot.  Then we have memory leak issues in drivers using
  virt-dma by Peter on few drive"

* 'fixes' of git://git.infradead.org/users/vkoul/slave-dma:
  dmaengine: moxart-dma: Fix memory leak when stopping a running transfer
  dmaengine: bcm2835-dma: Fix memory leak when stopping a running transfer
  dmaengine: omap-dma: Fix memory leak when terminating running transfer
  dmaengine: edma: fix memory leak when terminating running transfers
  dmaengine: jz4740: Define capabilities

Pull networking fixes from David Miller:

 1) Fix use-after-free with mac80211 RX A-MPDU reorder timer, from
    Johannes Berg.

 2) iwlwifi leaks memory every module load/unload cycles, fix from Larry
    Finger.

 3) Need to use for_each_netdev_safe() in rtnl_group_changelink()
    otherwise we can crash, from WANG Cong.

 4) mlx4 driver does register_netdev() too early in the probe sequence,
    from Ido Shamay.

 5) Don't allow router discovery hop limit to decrease the interface's
    hop limit, from D.S. Ljungmark.

 6) tx_packets and tx_bytes improperly accounted for certain classes of
    USB network devices, fix from Ben Hutchings.

 7) ip{6}mr_rules_init() mistakenly use plain kfree to release the ipmr
    tables in the error path, they must instead use ip{6}mr_free_table().
    Fix from WANG Cong.

 8) cxgb4 doesn't properly quiesce all RX activity before unregistering
    the netdevice.  Fix from Hariprasad Shenai.

 9) Fix hash corruptions in ipvlan driver, from Jiri Benc.

10) nla_memcpy(), like a real memcpy, should fully initialize the
    destination buffer, even if the source attribute is smaller.  Fix
    from Jiri Benc.

11) Fix wrong error code returned from iucv_sock_sendmsg().  We should
    use whatever sock_alloc_send_skb() put into 'err'.  From Eugene
    Crosser.

12) Fix slab object leak on module unload in TIPC, from Ying Xue.

13) Need a READ_ONCE() when reading the cached RX socket route in
    tcp_v{4,6}_early_demux().  From Michal Kubecek.

14) Still too many problems with TPC support in the ath9k driver, so
    disable it for now.  From Felix Fietkau.

15) When in AP mode the rtlwifi driver can leak DMA mappings, fix from
    Larry Finger.

16) Missing kzalloc() failure check in gs_usb CAN driver, from Colin Ian
    King.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (52 commits)
  cxgb4: Fix to dump devlog, even if FW is crashed
  cxgb4: Firmware macro changes for fw verison 1.13.32.0
  bnx2x: Fix kdump when iommu=on
  bnx2x: Fix kdump on 4-port device
  mac80211: fix RX A-MPDU session reorder timer deletion
  MAINTAINERS: Update Intel Wired Ethernet Driver info
  tipc: fix a slab object leak
  net/usb/r8152: add device id for Lenovo TP USB 3.0 Ethernet
  af_iucv: fix AF_IUCV sendmsg() errno
  openvswitch: Return vport module ref before destruction
  netlink: pad nla_memcpy dest buffer with zeroes
  bonding: Bonding Overriding Configuration logic restored.
  ipvlan: fix check for IP addresses in control path
  ipvlan: do not use rcu operations for address list
  ipvlan: protect against concurrent link removal
  ipvlan: fix addr hash list corruption
  net: fec: setup right value for mdio hold time
  net: tcp6: fix double call of tcp_v6_fill_cb()
  cxgb4vf: Fix sparse warnings
  netns: don't clear nsid too early on removal
  ...

Properly verify that the resulting page aligned end address is larger
than both the start address and the length of the memory area requested.

Both the start and length arguments for ib_umem_get are controlled by
the user. A misbehaving user can provide values which will cause an
integer overflow when calculating the page aligned end address.

This overflow can cause also miscalculation of the number of pages
mapped, and additional logic issues.

Addresses: CVE-2014-8159
Cc: <stable@vger.kernel.org>
Signed-off-by: Shachar Raindel <raindel@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

We need to wait for all fences, not just the exclusive one.

Signed-off-by: Christian König <christian.koenig@amd.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

We somehow try to free the SG table twice.

Bugs: https://bugs.freedesktop.org/show_bug.cgi?id=89734

Signed-off-by: Christian König <christian.koenig@amd.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

When performing a modeset, use the framebuffer pitch value to set FIMD
IMG_SIZE and Mixer SPAN registers. These are both defined as pitch - the
distance between contiguous lines (bytes for FIMD, pixels for mixer).

Fixes display on Snow (1366x768).

Signed-off-by: Daniel Stone <daniels@collabora.com>
Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

The legcy colorkey ioctls are only implemented for sprite planes, so
reject the ioctl for primary/cursor planes. If we want to support
colorkeying with these planes (assuming we have hw support of course)
we should just move ahead with the colorkey property conversion.

Testcase: kms_legacy_colorkey
Cc: Tommi Rantala <tt.rantala@gmail.com>
Cc: stable@vger.kernel.org
Reference: http://mid.gmane.org/CA+ydwtr+bCo7LJ44JFmUkVRx144UDFgOS+aJTfK6KHtvBDVuAw@mail.gmail.com
Reported-and-tested-by: Tommi Rantala <tt.rantala@gmail.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

Merge tag 'wireless-drivers-for-davem-2015-04-01' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers

Kalle Valo says:

====================
iwlwifi:

* fix a memory leak, we leaked memory each time the module
  was loaded.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

Hariprasad Shenai says:

====================
cxgb4 FW macro changes for new FW

Fix to dump device log even in the case of firmware crash. Also
incorporates changes for new FW.

This patch series has been created against net tree and includes patches on
cxgb4 driver.

We have included all the maintainers of respective drivers. Kindly review the
change and let us know in case of any review comments.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

Add new Common Code routines to retrieve Firmware Device Log
parameters from PCIE_FW_PF[7]. The firmware initializes its Device Log very
early on and stores the parameters for its location/size in that register.
Using the parameters from the register allows us to access the Firmware
Device Log even when the firmware crashes very early on or we're not
attached to the firmware

Based on original work by Casey Leedom <leedom@chelsio.com>

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Adds new macro and few macro changes for fw version 1.13.32.0 also
changes version string in driver to match 1.13.32.0

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge tag 'mac80211-for-davem-2015-04-01' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211

Johannes Berg says:

====================
This contains just a single fix for a crash I happened to randomly
run into today during testing. It's clearly been around for a while,
but is pretty hard to trigger, even when I tried explicitly (and
modified the code to make it more likely) it rarely did.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

Pull IOMMU fixes from Joerg Roedel:
 "This contains fixes for:

   - a VT-d issue where hardware domain-ids might be freed while still
     in use.

   - an ipmmu-vmsa issue where where the device-table was not zero
     terminated

   - unchecked register access issue in the arm-smmu driver"

* tag 'iommu-fixes-v4.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/vt-d: Remove unused variable
  iommu: ipmmu-vmsa: Add terminating entry for ipmmu_of_ids
  iommu/vt-d: Detach domain *only* from attached iommus
  iommu/arm-smmu: fix ARM_SMMU_FEAT_TRANS_OPS condition

Since commit 8e709469

 ("lguest: add a dummy PCI host bridge.")
lguest uses PCI, but it needs you to frob the ports directly.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull lazytime fixes from Ted Ts'o:
 "This fixes a problem in the lazy time patches, which can cause
  frequently updated inods to never have their timestamps updated.

  These changes guarantee that no timestamp on disk will be stale by
  more than 24 hours"

* tag 'lazytime_fix' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  fs: add dirtytime_expire_seconds sysctl
  fs: make sure the timestamps for lazytime inodes eventually get written

Pull nfsd fixes from Bruce Fields:
 "Two main issues:

   - We found that turning on pNFS by default (when it's configured at
     build time) was too aggressive, so we want to switch the default
     before the 4.0 release.

   - Recent client changes to increase open parallelism uncovered a
     serious bug lurking in the server's open code.

  Also fix a krb5/selinux regression.

  The rest is mainly smaller pNFS fixes"

* 'for-4.0' of git://linux-nfs.org/~bfields/linux:
  sunrpc: make debugfs file creation failure non-fatal
  nfsd: require an explicit option to enable pNFS
  NFSD: Fix bad update of layout in nfsd4_return_file_layout
  NFSD: Take care the return value from nfsd4_encode_stateid
  NFSD: Printk blocklayout length and offset as format 0x%llx
  nfsd: return correct lockowner when there is a race on hash insert
  nfsd: return correct openowner when there is a race to put one in the hash
  NFSD: Put exports after nfsd4_layout_verify fail
  NFSD: Error out when register_shrinker() fail
  NFSD: Take care the return value from nfsd4_decode_stateid
  NFSD: Check layout type when returning client layouts
  NFSD: restore trace event lost in mismerge

Yuval Mintz says:

====================
bnx2x: kdump related fixes

This patch series aims to fix bnx2x driver issues when loading in kdump kernel.
Both issues fixed here would be fatal to the device, requiring full reset of
the system in order to recover, preventing the device from serving its purpose
in the kdump environment.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

When IOMM-vtd is active, once main kernel crashes unfinished DMAE transactions
will be blocked, putting the HW in an error state which will cause further
transactions to timeout.

Current employed logic uses wrong macros, causing the first function to be the
only function that cleanups that error state during its probe/load.

This patch allows all the functions to successfully re-load in kdump kernel.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: Ariel Elior <Ariel.Elior@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

When running in a kdump kernel, it's very likely that due to sync. loss with
management firmware the first PCI function to probe and reach the previous
unload flow would decide it can reset the chip and continue onward. While doing
so, it will only close its own Rx port.

On a 4-port device where 2nd port on engine is a 1g-port, the 2nd port would
allow ingress traffic after the chip is reset [assuming it was active on the
first kernel]. This would later cause a HW attention.

This changes driver flow to close both ports' 1g capabilities during the
previous driver unload flow prior to the chip reset.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: Ariel Elior <Ariel.Elior@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

There's an issue with the way the RX A-MPDU reorder timer is
deleted that can cause a kernel crash like this:

 * tid_rx is removed - call_rcu(ieee80211_free_tid_rx)
 * station is destroyed
 * reorder timer fires before ieee80211_free_tid_rx() runs,
   accessing the station, thus potentially crashing due to
   the use-after-free

The station deletion is protected by synchronize_net(), but
that isn't enough -- ieee80211_free_tid_rx() need not have
run when that returns (it deletes the timer.) We could use
rcu_barrier() instead of synchronize_net(), but that's much
more expensive.

Instead, to fix this, add a field tracking that the session
is being deleted. In this case, the only re-arming of the
timer happens with the reorder spinlock held, so make that
code not rearm it if the session is being deleted and also
delete the timer after setting that field. This ensures the
timer cannot fire after ___ieee80211_stop_rx_ba_session()
returns, which fixes the problem.

Cc: stable@vger.kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Update the git tree info with a recent change in tree names.  Also
add our new mailing list created solely for Linux kernel patches
and kernel development, as well as the new patchwork project for
tracking patches.  Lastly update the list of "reviewers" since a
couple of developers have moved on to different projects.

Made an update to the section header so that it is more manageable
going forward as we add new drivers.

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

When remove TIPC module, there is a warning to remind us that a slab
object is leaked like:

root@localhost:~# rmmod tipc
[   19.056226] =============================================================================
[   19.057549] BUG TIPC (Not tainted): Objects remaining in TIPC on kmem_cache_close()
[   19.058736] -----------------------------------------------------------------------------
[   19.058736]
[   19.060287] INFO: Slab 0xffffea0000519a00 objects=23 used=1 fp=0xffff880014668b00 flags=0x100000000004080
[   19.061915] INFO: Object 0xffff880014668000 @offset=0
[   19.062717] kmem_cache_destroy TIPC: Slab cache still has objects

This is because the listening socket of TIPC topology server is not
closed before TIPC proto handler is unregistered with proto_unregister().
However, as the socket is closed in tipc_exit_net() which is called by
unregister_pernet_subsys() during unregistering TIPC namespace operation,
the warning can be eliminated if calling unregister_pernet_subsys() is
moved before calling proto_unregister().

Fixes: e05b31f4

 ("tipc: make tipc socket support net namespace")
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Signed-off-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Space allocated for paca is based off nr_cpu_ids,
but pnv_alloc_idle_core_states() iterates paca with
cpu_nr_cores()*threads_per_core, which is using NR_CPUS.

This causes pnv_alloc_idle_core_states() to write over memory,
which is outside of paca array and may later lead to various panics.

Fixes: 7cba160a

 (powernv/cpuidle: Redesign idle states management)
Signed-off-by: Jan Stancek <jstancek@redhat.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

This device is sold as 'Lenovo Tinkpad USB 3.0 Ethernet 4X90E51405'.
Chipset is RTL8153 and works with r8152.

Signed-off-by: Christian Hesse <mail@eworm.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

When sending over AF_IUCV socket, errno was incorrectly set to
ENOMEM even when other values where appropriate, notably EAGAIN.
With this patch, error indicator returned by sock_alloc_send_skb()
is passed to the caller, rather than being overwritten with ENOMEM.

Signed-off-by: Eugene Crosser <Eugene.Crosser@ru.ibm.com>
Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Return module reference before invoking the respective vport
->destroy() function. This is needed as ovs_vport_del() is not
invoked inside an RCU read side critical section so the kfree
can occur immediately before returning to ovs_vport_del().

Returning the module reference before ->destroy() is safe because
the module unregistration is blocked on ovs_lock which we hold
while destroying the datapath.

Fixes: 62b9c8d0

 ("ovs: Turn vports with dependencies into separate modules")
Reported-by: Pravin Shelar <pshelar@nicira.com>
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

We currently have a problem that SELinux policy is being enforced when
creating debugfs files. If a debugfs file is created as a side effect of
doing some syscall, then that creation can fail if the SELinux policy
for that process prevents it.

This seems wrong. We don't do that for files under /proc, for instance,
so Bruce has proposed a patch to fix that.

While discussing that patch however, Greg K.H. stated:

    "No kernel code should care / fail if a debugfs function fails, so
     please fix up the sunrpc code first."

This patch converts all of the sunrpc debugfs setup code to be void
return functins, and the callers to not look for errors from those
functions.

This should allow rpc_clnt and rpc_xprt creation to work, even if the
kernel fails to create debugfs files for some reason.

Symptoms were failing krb5 mounts on systems using gss-proxy and
selinux.

Fixes: 388f0c77

 "sunrpc: add a debugfs rpc_xprt directory..."
Cc: stable@vger.kernel.org
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>