Now that file contexts have been moved into file, and task context
fns() and data have been split from the context, only the cred context
remains in context.h so rename to cred.h to better reflect what it
deals with.
Signed-off-by: John Johansen <john.johansen@canonical.com>
now that cred_ctx has been removed we can rename task_ctxs from tctx
without causing confusion.
Signed-off-by: John Johansen <john.johansen@canonical.com>
With the task domain change information now stored in the task->security
context, the cred->security context only stores the label. We can get
rid of the cred_ctx and directly reference the label, removing a layer
of indirection, and unneeded extra allocations.
Signed-off-by: John Johansen <john.johansen@canonical.com>
The task domain change info is task specific and its and abuse of
the cred to store the information in there. Now that a task->security
field exists store it in the proper place.
Signed-off-by: John Johansen <john.johansen@canonical.com>
Allow apparmor to audit the number of a signal that it does not
provide a mapping for and is currently being reported only as
unknown.
Signed-off-by: John Johansen <john.johansen@canonical.com>
Given a label with a profile stack of
A//&B or A//&C ...
A ptrace rule should be able to specify a generic trace pattern with
a rule like
signal send A//&**,
however this is failing because while the correct label match routine
is called, it is being done post label decomposition so it is always
being done against a profile instead of the stacked label.
To fix this refactor the cross check to pass the full peer label in to
the label_match.
Signed-off-by: John Johansen <john.johansen@canonical.com>
These duplicate includes have been found with scripts/checkincludes.pl but
they have been removed manually to avoid removing false positives.
Signed-off-by: Pravin Shedge <pravin.shedge4linux@gmail.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
The root view of the label parse should not be exposed to user
control.
Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
nulldfa.in makes for a very long unwrapped line, which certain tools
do not like. So add line breaks.
Signed-off-by: John Johansen <john.johansen@canonical.com>
some label/context sources might not be guaranteed to be null terminiated
provide a size bounded version of label parse to deal with these.
Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
The current split scheme is actually wrong in that it splits
///&
where that is invalid and should fail. Use the dfa to do a proper
bounded split without having to worry about getting the string
processing right in code.
Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
Splitting the management struct from the actual data blob will allow
us in the future to do some sharing and other data reduction
techniques like replacing the the raw data with compressed data.
Prepare for this by separating the management struct from the data
blob.
Signed-off-by: John Johansen <john.johansen@canonical.com>
The existence test is not being properly logged as the signal mapping
maps it to the last entry in the named signal table. This is done
to help catch bugs by making the 0 mapped signal value invalid so
that we can catch the signal value not being filled in.
When fixing the off-by-one comparision logic the reporting of the
existence test was broken, because the logic behind the mapped named
table was hidden. Fix this by adding a define for the name lookup
and using it.
Cc: Stable <stable@vger.kernel.org>
Fixes: f7dc4c9a85 ("apparmor: fix off-by-one comparison on MAXMAPPED_SIG")
Signed-off-by: John Johansen <john.johansen@canonical.com>
Resource auditing is using the peer field which is not available
when the rlim data struct is used, because it is a different element
of the same union. Accessing peer during resource auditing could
cause garbage log entries or even oops the kernel.
Move the rlim data block into the same struct as the peer field
so they can be used together.
CC: <stable@vger.kernel.org>
Fixes: 86b92cb782 ("apparmor: move resource checks to using labels")
Signed-off-by: John Johansen <john.johansen@canonical.com>
The .ns_name should not be virtualized by the current ns view. It
needs to report the ns base name as that is being used during startup
as part of determining apparmor policy namespace support.
BugLink: http://bugs.launchpad.net/bugs/1746463
Fixes: d9f02d9c23 ("apparmor: fix display of ns name")
Cc: Stable <stable@vger.kernel.org>
Reported-by: Serge Hallyn <serge@hallyn.com>
Tested-by: Serge Hallyn <serge@hallyn.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Pull x86 retpoline fixlet from Thomas Gleixner:
"Remove the ESP/RSP thunks for retpoline as they cannot ever work.
Get rid of them before they show up in a release"
* 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/retpoline: Remove the esp/rsp thunk
Pull x86 fixes from Thomas Gleixner:
"A set of small fixes for 4.15:
- Fix vmapped stack synchronization on systems with 4-level paging
and a large amount of memory caused by a missing 5-level folding
which made the pgd synchronization logic to fail and causing double
faults.
- Add a missing sanity check in the vmalloc_fault() logic on 5-level
paging systems.
- Bring back protection against accessing a freed initrd in the
microcode loader which was lost by a wrong merge conflict
resolution.
- Extend the Broadwell micro code loading sanity check.
- Add a missing ENDPROC annotation in ftrace assembly code which
makes ORC unhappy.
- Prevent loading the AMD power module on !AMD platforms. The load
itself is uncritical, but an unload attempt results in a kernel
crash.
- Update Peter Anvins role in the MAINTAINERS file"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/ftrace: Add one more ENDPROC annotation
x86: Mark hpa as a "Designated Reviewer" for the time being
x86/mm/64: Tighten up vmalloc_fault() sanity checks on 5-level kernels
x86/mm/64: Fix vmapped stack syncing on very-large-memory 4-level systems
x86/microcode: Fix again accessing initrd after having been freed
x86/microcode/intel: Extend BDW late-loading further with LLC size check
perf/x86/amd/power: Do not load AMD power module on !AMD platforms
Pull timer fix from Thomas Gleixner:
"A single fix for a ~10 years old problem which causes high resolution
timers to stop after a CPU unplug/plug cycle due to a stale flag in
the per CPU hrtimer base struct.
Paul McKenney was hunting this for about a year, but the heisenbug
nature made it resistant against debug attempts for quite some time"
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
hrtimer: Reset hrtimer cpu base proper on CPU hotplug
Pull scheduler fix from Thomas Gleixner:
"A single bug fix to prevent a subtle deadlock in the scheduler core
code vs cpu hotplug"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/core: Fix cpu.max vs. cpuhotplug deadlock
Pull perf fixes from Thomas Gleixner:
"Four patches which all address lock inversions and deadlocks in the
perf core code and the Intel debug store"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86: Fix perf,x86,cpuhp deadlock
perf/core: Fix ctx::mutex deadlock
perf/core: Fix another perf,trace,cpuhp lock inversion
perf/core: Fix lock inversion between perf,trace,cpuhp
Pull locking fixes from Thomas Gleixner:
"Two final locking fixes for 4.15:
- Repair the OWNER_DIED logic in the futex code which got wreckaged
with the recent fix for a subtle race condition.
- Prevent the hard lockup detector from triggering when dumping all
held locks in the system"
* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
locking/lockdep: Avoid triggering hardlockup from debug_show_all_locks()
futex: Fix OWNER_DEAD fixup
When ORC support was added for the ftrace_64.S code, an ENDPROC
for function_hook() was missed. This results in the following warning:
arch/x86/kernel/ftrace_64.o: warning: objtool: .entry.text+0x0: unreachable instruction
Fixes: e2ac83d74a ("x86/ftrace: Fix ORC unwinding from ftrace handlers")
Reported-by: Steven Rostedt <rostedt@goodmis.org>
Reported-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lkml.kernel.org/r/20180128022150.dqierscqmt3uwwsr@treble
The hrtimer interrupt code contains a hang detection and mitigation
mechanism, which prevents that a long delayed hrtimer interrupt causes a
continous retriggering of interrupts which prevent the system from making
progress. If a hang is detected then the timer hardware is programmed with
a certain delay into the future and a flag is set in the hrtimer cpu base
which prevents newly enqueued timers from reprogramming the timer hardware
prior to the chosen delay. The subsequent hrtimer interrupt after the delay
clears the flag and resumes normal operation.
If such a hang happens in the last hrtimer interrupt before a CPU is
unplugged then the hang_detected flag is set and stays that way when the
CPU is plugged in again. At that point the timer hardware is not armed and
it cannot be armed because the hang_detected flag is still active, so
nothing clears that flag. As a consequence the CPU does not receive hrtimer
interrupts and no timers expire on that CPU which results in RCU stalls and
other malfunctions.
Clear the flag along with some other less critical members of the hrtimer
cpu base to ensure starting from a clean state when a CPU is plugged in.
Thanks to Paul, Sebastian and Anna-Maria for their help to get down to the
root cause of that hard to reproduce heisenbug. Once understood it's
trivial and certainly justifies a brown paperbag.
Fixes: 41d2e49493 ("hrtimer: Tune hrtimer_interrupt hang logic")
Reported-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Sewior <bigeasy@linutronix.de>
Cc: Anna-Maria Gleixner <anna-maria@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/alpine.DEB.2.20.1801261447590.2067@nanos
Due to some unfortunate events, I have not been directly involved in
the x86 kernel patch flow for a while now. I have also not been able
to ramp back up by now like I had hoped to, and after reviewing what I
will need to work on both internally at Intel and elsewhere in the near
term, it is clear that I am not going to be able to ramp back up until
late 2018 at the very earliest.
It is not acceptable to not recognize that this load is currently
taken by Ingo and Thomas without my direct participation, so I mark
myself as R: (designated reviewer) rather than M: (maintainer) until
further notice. This is in fact recognizing the de facto situation
for the past few years.
I have obviously no intention of going away, and I will do everything
within my power to improve Linux on x86 and x86 for Linux. This,
however, puts credit where it is due and reflects a change of focus.
This patch also removes stale entries for portions of the x86
architecture which have not been maintained separately from arch/x86
for a long time. If there is a reason to re-introduce them then that
can happen later.
Signed-off-by: H. Peter Anvin <h.peter.anvin@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Bruce Schlobohm <bruce.schlobohm@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180125195934.5253-1-hpa@zytor.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Sorry to send something essentially as late as possible (Friday after an
rc9), but we managed to get a mailing list for the RISC-V Linux port.
We've been using patches@groups.riscv.org for a while, but that list has
some problems (it's Google Groups and it's shared over all RISC-V
software projects). The new infaread.org list is much better. We just
got it on Wednesday but I used it a bit on Thursday to shake out all the
configuration problems and it appears to be in working order.
When I updated the mailing list I noticed that the MAINTAINERS file was
pointing to our github repo, but now that we have a kernel.org repo I'd
like to point to that instead so I changed that as well. We'll be
centralizing all RISC-V Linux related development here as that seems to
be the saner way to go about it.
I can understand if it's too late to get this into 4.15, but given that
it's not a code change I was hoping it'd still be OK. It would be nice
to have the new mailing list and git repo in the release tarballs so
when people start to find bugs they'll get to the right place.
-----BEGIN PGP SIGNATURE-----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=zdWp
-----END PGP SIGNATURE-----
Merge tag 'riscv-for-linus-4.15-maintainers' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux
Pull RISC-V update from Palmer Dabbelt:
"RISC-V: We have a new mailing list and git repo!
Sorry to send something essentially as late as possible (Friday after
an rc9), but we managed to get a mailing list for the RISC-V Linux
port. We've been using patches@groups.riscv.org for a while, but that
list has some problems (it's Google Groups and it's shared over all
RISC-V software projects). The new infaread.org list is much better.
We just got it on Wednesday but I used it a bit on Thursday to shake
out all the configuration problems and it appears to be in working
order.
When I updated the mailing list I noticed that the MAINTAINERS file
was pointing to our github repo, but now that we have a kernel.org
repo I'd like to point to that instead so I changed that as well.
We'll be centralizing all RISC-V Linux related development here as
that seems to be the saner way to go about it.
I can understand if it's too late to get this into 4.15, but given
that it's not a code change I was hoping it'd still be OK. It would be
nice to have the new mailing list and git repo in the release tarballs
so when people start to find bugs they'll get to the right place"
* tag 'riscv-for-linus-4.15-maintainers' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux:
Update the RISC-V MAINTAINERS file
Pull networking fixes from David Miller:
1) The per-network-namespace loopback device, and thus its namespace,
can have its teardown deferred for a long time if a kernel created
TCP socket closes and the namespace is exiting meanwhile. The kernel
keeps trying to finish the close sequence until it times out (which
takes quite some time).
Fix this by forcing the socket closed in this situation, from Dan
Streetman.
2) Fix regression where we're trying to invoke the update_pmtu method
on route types (in this case metadata tunnel routes) that don't
implement the dst_ops method. Fix from Nicolas Dichtel.
3) Fix long standing memory corruption issues in r8169 driver by
performing the chip statistics DMA programming more correctly. From
Francois Romieu.
4) Handle local broadcast sends over VRF routes properly, from David
Ahern.
5) Don't refire the DCCP CCID2 timer endlessly, otherwise the socket
can never be released. From Alexey Kodanev.
6) Set poll flags properly in VSOCK protocol layer, from Stefan
Hajnoczi.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
VSOCK: set POLLOUT | POLLWRNORM for TCP_CLOSING
dccp: don't restart ccid2_hc_tx_rto_expire() if sk in closed state
net: vrf: Add support for sends to local broadcast address
r8169: fix memory corruption on retrieval of hardware statistics.
net: don't call update_pmtu unconditionally
net: tcp: close sock if net namespace is exiting
-----BEGIN PGP SIGNATURE-----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=r4NK
-----END PGP SIGNATURE-----
Merge tag 'drm-fixes-for-v4.15-rc10-2' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
"A fairly urgent nouveau regression fix for broken irqs across
suspend/resume came in. This was broken before but a patch in 4.15 has
made it much more obviously broken and now s/r fails a lot more often.
The fix removes freeing the irq across s/r which never should have
been done anyways.
Also two vc4 fixes for a NULL deference and some misrendering /
flickering on screen"
* tag 'drm-fixes-for-v4.15-rc10-2' of git://people.freedesktop.org/~airlied/linux:
drm/nouveau: Move irq setup/teardown to pci ctor/dtor
drm/vc4: Fix NULL pointer dereference in vc4_save_hang_state()
drm/vc4: Flush the caches before the bin jobs, as well.
select(2) with wfds but no rfds must return when the socket is shut down
by the peer. This way userspace notices socket activity and gets -EPIPE
from the next write(2).
Currently select(2) does not return for virtio-vsock when a SEND+RCV
shutdown packet is received. This is because vsock_poll() only sets
POLLOUT | POLLWRNORM for TCP_CLOSE, not the TCP_CLOSING state that the
socket is in when the shutdown is received.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
ccid2_hc_tx_rto_expire() timer callback always restarts the timer
again and can run indefinitely (unless it is stopped outside), and after
commit 120e9dabaf ("dccp: defer ccid_hc_tx_delete() at dismantle time"),
which moved ccid_hc_tx_delete() (also includes sk_stop_timer()) from
dccp_destroy_sock() to sk_destruct(), this started to happen quite often.
The timer prevents releasing the socket, as a result, sk_destruct() won't
be called.
Found with LTP/dccp_ipsec tests running on the bonding device,
which later couldn't be unloaded after the tests were completed:
unregister_netdevice: waiting for bond0 to become free. Usage count = 148
Fixes: 2a91aa3967 ("[DCCP] CCID2: Initial CCID2 (TCP-Like) implementation")
Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Now that we're upstream in Linux we've been able to make some
infrastructure changes so our port works a bit more like other ports.
Specifically:
* We now have a mailing list specific to the RISC-V Linux port, hosted
at lists.infreadead.org.
* We now have a kernel.org git tree where work on our port is
coordinated.
This patch changes the RISC-V maintainers entry to reflect these new
bits of infrastructure.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
On a 5-level kernel, if a non-init mm has a top-level entry, it needs to
match init_mm's, but the vmalloc_fault() code skipped over the BUG_ON()
that would have checked it.
While we're at it, get rid of the rather confusing 4-level folded "pgd"
logic.
Cleans-up: b50858ce3e ("x86/mm/vmalloc: Add 5-level paging support")
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Neil Berrington <neil.berrington@datacore.com>
Link: https://lkml.kernel.org/r/2ae598f8c279b0a29baf75df207e6f2fdddc0a1b.1516914529.git.luto@kernel.org
Neil Berrington reported a double-fault on a VM with 768GB of RAM that uses
large amounts of vmalloc space with PTI enabled.
The cause is that load_new_mm_cr3() was never fixed to take the 5-level pgd
folding code into account, so, on a 4-level kernel, the pgd synchronization
logic compiles away to exactly nothing.
Interestingly, the problem doesn't trigger with nopti. I assume this is
because the kernel is mapped with global pages if we boot with nopti. The
sequence of operations when we create a new task is that we first load its
mm while still running on the old stack (which crashes if the old stack is
unmapped in the new mm unless the TLB saves us), then we call
prepare_switch_to(), and then we switch to the new stack.
prepare_switch_to() pokes the new stack directly, which will populate the
mapping through vmalloc_fault(). I assume that we're getting lucky on
non-PTI systems -- the old stack's TLB entry stays alive long enough to
make it all the way through prepare_switch_to() and switch_to() so that we
make it to a valid stack.
Fixes: b50858ce3e ("x86/mm/vmalloc: Add 5-level paging support")
Reported-and-tested-by: Neil Berrington <neil.berrington@datacore.com>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Cc: stable@vger.kernel.org
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Link: https://lkml.kernel.org/r/346541c56caed61abbe693d7d2742b4a380c5001.1516914529.git.luto@kernel.org
Sukumar reported that sends to the local broadcast address
(255.255.255.255) are broken. Check for the address in vrf driver
and do not redirect to the VRF device - similar to multicast
packets.
With this change sockets can use SO_BINDTODEVICE to specify an
egress interface and receive responses. Note: the egress interface
can not be a VRF device but needs to be the enslaved device.
https://bugzilla.kernel.org/show_bug.cgi?id=198521
Reported-by: Sukumar Gopalakrishnan <sukumarg1973@gmail.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Hardware statistics retrieval hurts in tight invocation loops.
Avoid extraneous write and enforce strict ordering of writes targeted to
the tally counters dump area address registers.
Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Tested-by: Oliver Freyermuth <o.freyermuth@googlemail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pull input fixes from Dmitry Torokhov:
"The main item is that we try to better handle the newer trackpoints on
Lenovo devices that are now being produced by Elan/ALPS/NXP and only
implement a small subset of the original IBM trackpoint controls"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Revert "Input: synaptics_rmi4 - use devm_device_add_group() for attributes in F01"
Input: trackpoint - only expose supported controls for Elan, ALPS and NXP
Input: trackpoint - force 3 buttons if 0 button is reported
Input: xpad - add support for PDP Xbox One controllers
Input: stmfts,s6sy671 - add SPDX identifier
After do_readv_writev, the inode cache is invalidated anyway, so i_size
will never be read. It will be fetched from the server which will also
know about updates from other machines.
Fixes deadlock on 32-bit SMP.
See https://marc.info/?l=linux-fsdevel&m=151268557427760&w=2
Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Mike Marshall <hubcap@omnibond.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
For a while we've been having issues with seemingly random interrupts
coming from nvidia cards when resuming them. Originally the fix for this
was thought to be just re-arming the MSI interrupt registers right after
re-allocating our IRQs, however it seems a lot of what we do is both
wrong and not even nessecary.
This was made apparent by what appeared to be a regression in the
mainline kernel that started introducing suspend/resume issues for
nouveau:
a0c9259dc4 (irq/matrix: Spread interrupts on allocation)
After this commit was introduced, we started getting interrupts from the
GPU before we actually re-allocated our own IRQ (see references below)
and assigned the IRQ handler. Investigating this turned out that the
problem was not with the commit, but the fact that nouveau even
free/allocates it's irqs before and after suspend/resume.
For starters: drivers in the linux kernel haven't had to handle
freeing/re-allocating their IRQs during suspend/resume cycles for quite
a while now. Nouveau seems to be one of the few drivers left that still
does this, despite the fact there's no reason we actually need to since
disabling interrupts from the device side should be enough, as the
kernel is already smart enough to know to disable host-side interrupts
for us before going into suspend. Since we were tearing down our IRQs by
hand however, that means there was a short period during resume where
interrupts could be received before we re-allocated our IRQ which would
lead to us getting an unhandled IRQ. Since we never handle said IRQ and
re-arm the interrupt registers, this would cause us to miss all of the
interrupts from the GPU and cause our init process to start timing out
on anything requiring interrupts.
So, since this whole setup/teardown every suspend/resume cycle is
useless anyway, move irq setup/teardown into the pci subdev's ctor/dtor
functions instead so they're only called at driver load and driver
unload. This should fix most of the issues with pending interrupts on
resume, along with getting suspend/resume for nouveau to work again.
As well, this probably means we can also just remove the msi rearm call
inside nvkm_pci_init(). But since our main focus here is to fix
suspend/resume before 4.15, we'll save that for a later patch.
Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: Karol Herbst <kherbst@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Mike Galbraith <efault@gmx.de>
Cc: stable@vger.kernel.org
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Some dst_ops (e.g. md_dst_ops)) doesn't set this handler. It may result to:
"BUG: unable to handle kernel NULL pointer dereference at (null)"
Let's add a helper to check if update_pmtu is available before calling it.
Fixes: 52a589d51f ("geneve: update skb dst pmtu on tx path")
Fixes: a93bf0ff44 ("vxlan: update skb dst pmtu on tx path")
CC: Roman Kapl <code@rkapl.cz>
CC: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fix races and potential use after free in the s390 cmma migration code.
-----BEGIN PGP SIGNATURE-----
iQEcBAABCAAGBQJaaghHAAoJEED/6hsPKofoJksIAJbpIR/Z6n1ycryT6G2iKmda
QT8hYLanuOHNyEinu1AoikqP2bQRzqwuYzfzkECyaliJXKpmki86f8p+HOsNH1Ye
db9vokkvWfyJBZ10d2JOLbGVDxQXX94bMgtO3aF6RcneYgalABOwQU4ltY5gnXXI
5E8xU9d7ya1ivv5ADvPW8tv6GU9YMb5VB1EzM2owjQP3ks0/6p3jXT8XJJGhfufO
6r6Y/E4HnxRKWXTDNoLU6b3sdpCDmMMBRO55AYE2eF/RA84glv9U+xnxs0fXJA8M
OOWrtB4nxxcrCbSve38aONN5E5lSzjWl6/3t2ajbDeIV8r9Fh8Vh7MpeSY6oyZs=
=i5NW
-----END PGP SIGNATURE-----
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM fixes from Radim Krčmář:
"Fix races and a potential use after free in the s390 cmma migration
code"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: s390: add proper locking for CMMA migration bitmap
-----BEGIN PGP SIGNATURE-----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=EOAu
-----END PGP SIGNATURE-----
Merge tag 'for-4.15-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fix from David Sterba:
"It's been reported recently that readdir can list stale entries under
some conditions. Fix it."
* tag 'for-4.15-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
Btrfs: fix stale entries in readdir
When a tcp socket is closed, if it detects that its net namespace is
exiting, close immediately and do not wait for FIN sequence.
For normal sockets, a reference is taken to their net namespace, so it will
never exit while the socket is open. However, kernel sockets do not take a
reference to their net namespace, so it may begin exiting while the kernel
socket is still open. In this case if the kernel socket is a tcp socket,
it will stay open trying to complete its close sequence. The sock's dst(s)
hold a reference to their interface, which are all transferred to the
namespace's loopback interface when the real interfaces are taken down.
When the namespace tries to take down its loopback interface, it hangs
waiting for all references to the loopback interface to release, which
results in messages like:
unregister_netdevice: waiting for lo to become free. Usage count = 1
These messages continue until the socket finally times out and closes.
Since the net namespace cleanup holds the net_mutex while calling its
registered pernet callbacks, any new net namespace initialization is
blocked until the current net namespace finishes exiting.
After this change, the tcp socket notices the exiting net namespace, and
closes immediately, releasing its dst(s) and their reference to the
loopback interface, which lets the net namespace continue exiting.
Link: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1711407
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=97811
Signed-off-by: Dan Streetman <ddstreet@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Lockdep noticed the following 3-way lockup scenario:
sys_perf_event_open()
perf_event_alloc()
perf_try_init_event()
#0 ctx = perf_event_ctx_lock_nested(1)
perf_swevent_init()
swevent_hlist_get()
#1 mutex_lock(&pmus_lock)
perf_event_init_cpu()
#1 mutex_lock(&pmus_lock)
#2 mutex_lock(&ctx->mutex)
sys_perf_event_open()
mutex_lock_double()
#2 mutex_lock()
#0 mutex_lock_nested()
And while we need that perf_event_ctx_lock_nested() for HW PMUs such
that they can iterate the sibling list, trying to match it to the
available counters, the software PMUs need do no such thing. Exclude
them.
In particular the swevent triggers the above invertion, while the
tpevent PMU triggers a more elaborate one through their event_mutex.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
