virtualization on Intel is broken in 3.13 and fixed by this
pull request.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.22 (GNU/Linux)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=zQTn
-----END PGP SIGNATURE-----
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM fixes from Paolo Bonzini:
"Three x86 fixes and one for ARM/ARM64.
In particular, nested virtualization on Intel is broken in 3.13 and
fixed by this pull request"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
kvm, vmx: Really fix lazy FPU on nested guest
kvm: x86: fix emulator buffer overflow (CVE-2014-0049)
arm/arm64: KVM: detect CPU reset on CPU_PM_EXIT
KVM: MMU: drop read-only large sptes when creating lower level sptes
Pull powerpc fixes from Ben Herrenschmidt:
"Here are a few more powerpc fixes for 3.14.
Most of these are also CC'ed to stable and fix bugs in new
functionality introduced in the last 2 or 3 versions"
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc/powernv: Fix indirect XSCOM unmangling
powerpc/powernv: Fix opal_xscom_{read,write} prototype
powerpc/powernv: Refactor PHB diag-data dump
powerpc/powernv: Dump PHB diag-data immediately
powerpc: Increase stack redzone for 64-bit userspace to 512 bytes
powerpc/ftrace: bugfix for test_24bit_addr
powerpc/crashdump : Fix page frame number check in copy_oldmem_page
powerpc/le: Ensure that the 'stop-self' RTAS token is handled correctly
Commit fb4a96029c (arm64: kernel: fix per-cpu offset restore on
resume) uses per_cpu_offset() unconditionally during CPU wakeup,
however, this is only defined for the SMP case.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Dave P Martin <Dave.Martin@arm.com>
Page table entries on ARM64 are 64 bits, and some pte functions such as
pte_dirty return a bitwise-and of a flag with the pte value. If the
flag to be tested resides in the upper 32 bits of the pte, then we run
into the danger of the result being dropped if downcast.
For example:
gather_stats(page, md, pte_dirty(*pte), 1);
where pte_dirty(*pte) is downcast to an int.
This patch adds a double logical invert to all the pte_ accessors to
ensure predictable downcasting.
Signed-off-by: Steve Capper <steve.capper@linaro.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
We need to unmangle the full address, not just the register
number, and we also need to support the real indirect bit
being set for in-kernel uses.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: <stable@vger.kernel.org> [v3.13]
The OPAL firmware functions opal_xscom_read and opal_xscom_write
take a 64-bit argument for the XSCOM (PCB) address in order to
support the indirect mode on P8.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: <stable@vger.kernel.org> [v3.13]
As Ben suggested, the patch prints PHB diag-data with multiple
fields in one line and omits the line if the fields of that
line are all zero.
With the patch applied, the PHB3 diag-data dump looks like:
PHB3 PHB#3 Diag-data (Version: 1)
brdgCtl: 00000002
RootSts: 0000000f 00400000 b0830008 00100147 00002000
nFir: 0000000000000000 0030006e00000000 0000000000000000
PhbSts: 0000001c00000000 0000000000000000
Lem: 0000000000100000 42498e327f502eae 0000000000000000
InAErr: 8000000000000000 8000000000000000 0402030000000000 0000000000000000
PE[ 8] A/B: 8480002b00000000 8000000000000000
[ The current diag data is so big that it overflows the printk
buffer pretty quickly in cases when we get a handful of errors
at once which can happen. --BenH
]
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
CC: <stable@vger.kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
The PHB diag-data is important to help locating the root cause for
EEH errors such as frozen PE or fenced PHB. However, the EEH core
enables IO path by clearing part of HW registers before collecting
this data causing it to be corrupted.
This patch fixes this by dumping the PHB diag-data immediately when
frozen/fenced state on PE or PHB is detected for the first time in
eeh_ops::get_state() or next_error() backend.
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
CC: <stable@vger.kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
The new ELFv2 little-endian ABI increases the stack redzone -- the
area below the stack pointer that can be used for storing data --
from 288 bytes to 512 bytes. This means that we need to allow more
space on the user stack when delivering a signal to a 64-bit process.
To make the code a bit clearer, we define new USER_REDZONE_SIZE and
KERNEL_REDZONE_SIZE symbols in ptrace.h. For now, we leave the
kernel redzone size at 288 bytes, since increasing it to 512 bytes
would increase the size of interrupt stack frames correspondingly.
Gcc currently only makes use of 288 bytes of redzone even when
compiling for the new little-endian ABI, and the kernel cannot
currently be compiled with the new ABI anyway.
In the future, hopefully gcc will provide an option to control the
amount of redzone used, and then we could reduce it even more.
This also changes the code in arch_compat_alloc_user_space() to
preserve the expanded redzone. It is not clear why this function would
ever be used on a 64-bit process, though.
Signed-off-by: Paul Mackerras <paulus@samba.org>
CC: <stable@vger.kernel.org> [v3.13]
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
The branch target should be the func addr, not the addr of func_descr_t.
So using ppc_function_entry() to generate the right target addr.
Signed-off-by: Liu Ping Fan <pingfank@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
In copy_oldmem_page, the current check using max_pfn and min_low_pfn to
decide if the page is backed or not, is not valid when the memory layout is
not continuous.
This happens when running as a QEMU/KVM guest, where RTAS is mapped higher
in the memory. In that case max_pfn points to the end of RTAS, and a hole
between the end of the kdump kernel and RTAS is not backed by PTEs. As a
consequence, the kdump kernel is crashing in copy_oldmem_page when accessing
in a direct way the pages in that hole.
This fix relies on the memblock's service memblock_is_region_memory to
check if the read page is part or not of the directly accessible memory.
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Tested-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
CC: <stable@vger.kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Currently we're storing a host endian RTAS token in
rtas_stop_self_args.token. We then pass that directly to rtas. This is
fine on big endian however on little endian the token is not what we
expect.
This will typically result in hitting:
panic("Alas, I survived.\n");
To fix this we always use the stop-self token in host order and always
convert it to be32 before passing this to rtas.
Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
Cc: stable@vger.kernel.org
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Commit e504c9098e (kvm, vmx: Fix lazy FPU on nested guest, 2013-11-13)
highlighted a real problem, but the fix was subtly wrong.
nested_read_cr0 is the CR0 as read by L2, but here we want to look at
the CR0 value reflecting L1's setup. In other words, L2 might think
that TS=0 (so nested_read_cr0 has the bit clear); but if L1 is actually
running it with TS=1, we should inject the fault into L1.
The effective value of CR0 in L2 is contained in vmcs12->guest_cr0, use
it.
Fixes: e504c9098e
Reported-by: Kashyap Chamarty <kchamart@redhat.com>
Reported-by: Stefan Bader <stefan.bader@canonical.com>
Tested-by: Kashyap Chamarty <kchamart@redhat.com>
Tested-by: Anthoine Bourgeois <bourgeois@bertin.fr>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
- Add the new sched_setattr/sched_getattr syscalls to the asm-generic
syscall list, which is used by arc, arm64, c6x, hexagon, metag,
openrisc, score, tile, and unicore32.
- An IRQ affinity bug fix for metag to prevent interrupts being vectored
to offline CPUs when their affinity is changed via /proc/irq/ (thanks
tglx).
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.13 (GNU/Linux)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=fVZo
-----END PGP SIGNATURE-----
Merge tag 'metag-fixes-v3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag
Pull Metag arch and asm-generic fixes from James Hogan:
- Add the new sched_setattr/sched_getattr syscalls to the asm-generic
syscall list, which is used by arc, arm64, c6x, hexagon, metag,
openrisc, score, tile, and unicore32.
- An IRQ affinity bug fix for metag to prevent interrupts being
vectored to offline CPUs when their affinity is changed via
/proc/irq/ (thanks tglx).
* tag 'metag-fixes-v3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag:
irq-metag*: stop set_affinity vectoring to offline cpus
asm-generic: add sched_setattr/sched_getattr syscalls
Just a single trivial patch to plug a memory leak in an error path.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.22 (GNU/Linux)
iQIcBAABAgAGBQJTDgK7AAoJEN0jrNd/PrOh6c4P/iBytP1gTlfTjleUO5/2n0vt
ILn6JWPoYx9hP+Zt+rjGqezIHAc60exGyANJOf8T+/BU9moHVHK9uCEzEu0vP8SR
qQyVxhXC55xL/6aHrQWtD47q13PNG989MGC4W/jWkPHbvtxg0YzWAu/Nq12ueZA8
vmkQKLVBG1Z9YQ9u1c4H4cP5XkLCZWTZAnImpcX35Nop74bTtOg+izoWm+3Yrt+K
vHlonTE7DsYdrjDoD+c0b1FjE7F376ywJAh9zEJox0OR+wLOdKCTqA6/qSwuv8dR
l5DLUbbmeTD+gOLEjDYcAw5FDmYDC5KygM7PtS7M+wmaHISHATlTlosmbozukbu/
Xit/IeRYRF+6t1JejO2cMGGZuDJ9uT1rKVl5KqA6mVAlrsYuFK+uzCcXNv6KwNxK
VrUG76KlBmy7ALn3dCBw6+dqFwmxBRUkRjaPByF9nvCAqBNud/uWVvfDGFF+dgo4
j1SKOrRq9N89uwYQpofLsLeVCWqm8QTbUuNLkz6z23xy2hItDYupLn0DRj2ND3ud
qF3QnEGx515ZlShAgkzkGCu6kRXMuUHAIMd7juZVjp5HDJJXK23zktSxflley5yX
Za8nRtIlM716TJxXQuJIjW14BKDmdoBvy/SRuGfa+lywfrgMKwndWHIt9VD5QLYo
xF6gRl4CuZqRuxF8RRbw
=zhst
-----END PGP SIGNATURE-----
Merge tag 'pwm/for-3.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
Pull pwm fix from Thierry Reding:
"Just a single trivial patch to plug a memory leak in an error path"
* tag 'pwm/for-3.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm:
pwm: lp3943: Fix potential memory leak during request
Pull filesystem fixes from Jan Kara:
"Notification, writeback, udf, quota fixes
The notification patches are (with one exception) a fallout of my
fsnotify rework which went into -rc1 (I've extented LTP to cover these
cornercases to avoid similar breakage in future).
The UDF patch is a nasty data corruption Al has recently reported,
the revert of the writeback patch is due to possibility of violating
sync(2) guarantees, and a quota bug can lead to corruption of quota
files in ocfs2"
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
fsnotify: Allocate overflow events with proper type
fanotify: Handle overflow in case of permission events
fsnotify: Fix detection whether overflow event is queued
Revert "writeback: do not sync data dirtied after sync start"
quota: Fix race between dqput() and dquot_scan_active()
udf: Fix data corruption on file type conversion
inotify: Fix reporting of cookies for inotify events
touch freed memory.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=J2Up
-----END PGP SIGNATURE-----
Merge tag 'upstream-3.14-rc5' of git://git.infradead.org/linux-ubifs
Pull ubifs fix from Artem Bityutskiy:
"Just a single fix for the UBI module unload path which makes sure we
do not touch freed memory"
* tag 'upstream-3.14-rc5' of git://git.infradead.org/linux-ubifs:
UBI: fix some use after free bugs
The problem occurs when the guest performs a pusha with the stack
address pointing to an mmio address (or an invalid guest physical
address) to start with, but then extending into an ordinary guest
physical address. When doing repeated emulated pushes
emulator_read_write sets mmio_needed to 1 on the first one. On a
later push when the stack points to regular memory,
mmio_nr_fragments is set to 0, but mmio_is_needed is not set to 0.
As a result, KVM exits to userspace, and then returns to
complete_emulated_mmio. In complete_emulated_mmio
vcpu->mmio_cur_fragment is incremented. The termination condition of
vcpu->mmio_cur_fragment == vcpu->mmio_nr_fragments is never achieved.
The code bounces back and fourth to userspace incrementing
mmio_cur_fragment past it's buffer. If the guest does nothing else it
eventually leads to a a crash on a memcpy from invalid memory address.
However if a guest code can cause the vm to be destroyed in another
vcpu with excellent timing, then kvm_clear_async_pf_completion_queue
can be used by the guest to control the data that's pointed to by the
call to cancel_work_item, which can be used to gain execution.
Fixes: f78146b0f9
Signed-off-by: Andrew Honig <ahonig@google.com>
Cc: stable@vger.kernel.org (3.5+)
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Commit 1fcf7ce0c6 (arm: kvm: implement CPU PM notifier) added
support for CPU power-management, using a cpu_notifier to re-init
KVM on a CPU that entered CPU idle.
The code assumed that a CPU entering idle would actually be powered
off, loosing its state entierely, and would then need to be
reinitialized. It turns out that this is not always the case, and
some HW performs CPU PM without actually killing the core. In this
case, we try to reinitialize KVM while it is still live. It ends up
badly, as reported by Andre Przywara (using a Calxeda Midway):
[ 3.663897] Kernel panic - not syncing: unexpected prefetch abort in Hyp mode at: 0x685760
[ 3.663897] unexpected data abort in Hyp mode at: 0xc067d150
[ 3.663897] unexpected HVC/SVC trap in Hyp mode at: 0xc0901dd0
The trick here is to detect if we've been through a full re-init or
not by looking at HVBAR (VBAR_EL2 on arm64). This involves
implementing the backend for __hyp_get_vectors in the main KVM HYP
code (rather small), and checking the return value against the
default one when the CPU notifier is called on CPU_PM_EXIT.
Reported-by: Andre Przywara <osp@andrep.de>
Tested-by: Andre Przywara <osp@andrep.de>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Rob Herring <rob.herring@linaro.org>
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Read-only large sptes can be created due to read-only faults as
follows:
- QEMU pagetable entry that maps guest memory is read-only
due to COW.
- Guest read faults such memory, COW is not broken, because
it is a read-only fault.
- Enable dirty logging, large spte not nuked because it is read-only.
- Write-fault on such memory causes guest to loop endlessly
(which must go down to level 1 because dirty logging is enabled).
Fix by dropping large spte when necessary.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Fix a memory leak in the lp3943_pwm_request_map() error handling path.
Make sure already allocated pwm map memory is freed correctly.
Detected by Coverity: CID 1162829.
Signed-off-by: Christian Engelmayer <cengelma@gmx.at>
Acked-by: Milo Kim <milo.kim@ti.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Merge misc fixes from Andrew Morton.
* emailed patches from Andrew Morton akpm@linux-foundation.org>:
MAINTAINERS: change mailing list address for Altera UART drivers
Makefile: fix build with make 3.80 again
MAINTAINERS: update L: misuses
Makefile: fix extra parenthesis typo when CC_STACKPROTECTOR_REGULAR is enabled
ipc,mqueue: remove limits for the amount of system-wide queues
memcg: change oom_info_lock to mutex
mm, thp: fix infinite loop on memcg OOM
drivers/fmc/fmc-write-eeprom.c: fix decimal permissions
drivers/iommu/omap-iommu-debug.c: fix decimal permissions
mm, hwpoison: release page on PageHWPoison() in __do_fault()
The nios2-dev list has been moved to the RocketBoards infrastructure, so
adjust the address accordingly.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
According to Documentation/Changes, make 3.80 is still being supported
for building the kernel, hence make files must not make (unconditional)
use of features introduced only in newer versions. Commit 8779657d29
("stackprotector: Introduce CONFIG_CC_STACKPROTECTOR_STRONG") however
introduced an "else ifdef" construct which make 3.80 doesn't understand.
Also correct a warning message still referencing the old config option
name.
Apart from that I question the use of "ifdef" here (but it was used that
way already prior to said commit): ifeq (,y) would seem more to the
point.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Michal Marek <mmarek@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
L: lines are for the email addresses of traditional mailing lists.
W: lines are for URLs.
Convert two L: misuses to W: links.
Signed-off-by: Joe Perches <joe@perches.com>
Reported-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
An extra parenthesis typo introduced in 19952a9203 ("stackprotector:
Unify the HAVE_CC_STACKPROTECTOR logic between architectures") is
causing the following error when CONFIG_CC_STACKPROTECTOR_REGULAR is
enabled:
Makefile:608: Cannot use CONFIG_CC_STACKPROTECTOR: -fstack-protector not supported by compiler
Makefile:608: *** missing separator. Stop.
Signed-off-by: Fathi Boudra <fathi.boudra@linaro.org>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit 93e6f119c0 ("ipc/mqueue: cleanup definition names and
locations") added global hardcoded limits to the amount of message
queues that can be created. While these limits are per-namespace,
reality is that it ends up breaking userspace applications.
Historically users have, at least in theory, been able to create up to
INT_MAX queues, and limiting it to just 1024 is way too low and dramatic
for some workloads and use cases. For instance, Madars reports:
"This update imposes bad limits on our multi-process application. As
our app uses approaches that each process opens its own set of queues
(usually something about 3-5 queues per process). In some scenarios
we might run up to 3000 processes or more (which of-course for linux
is not a problem). Thus we might need up to 9000 queues or more. All
processes run under one user."
Other affected users can be found in launchpad bug #1155695:
https://bugs.launchpad.net/ubuntu/+source/manpages/+bug/1155695
Instead of increasing this limit, revert it entirely and fallback to the
original way of dealing queue limits -- where once a user's resource
limit is reached, and all memory is used, new queues cannot be created.
Signed-off-by: Davidlohr Bueso <davidlohr@hp.com>
Reported-by: Madars Vitolins <m@silodev.com>
Acked-by: Doug Ledford <dledford@redhat.com>
Cc: Manfred Spraul <manfred@colorfullife.com>
Cc: <stable@vger.kernel.org> [3.5+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill has reported the following:
Task in /test killed as a result of limit of /test
memory: usage 10240kB, limit 10240kB, failcnt 51
memory+swap: usage 10240kB, limit 10240kB, failcnt 0
kmem: usage 0kB, limit 18014398509481983kB, failcnt 0
Memory cgroup stats for /test:
BUG: sleeping function called from invalid context at kernel/cpu.c:68
in_atomic(): 1, irqs_disabled(): 0, pid: 66, name: memcg_test
2 locks held by memcg_test/66:
#0: (memcg_oom_lock#2){+.+...}, at: [<ffffffff81131014>] pagefault_out_of_memory+0x14/0x90
#1: (oom_info_lock){+.+...}, at: [<ffffffff81197b2a>] mem_cgroup_print_oom_info+0x2a/0x390
CPU: 2 PID: 66 Comm: memcg_test Not tainted 3.14.0-rc1-dirty #745
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS Bochs 01/01/2011
Call Trace:
__might_sleep+0x16a/0x210
get_online_cpus+0x1c/0x60
mem_cgroup_read_stat+0x27/0xb0
mem_cgroup_print_oom_info+0x260/0x390
dump_header+0x88/0x251
? trace_hardirqs_on+0xd/0x10
oom_kill_process+0x258/0x3d0
mem_cgroup_oom_synchronize+0x656/0x6c0
? mem_cgroup_charge_common+0xd0/0xd0
pagefault_out_of_memory+0x14/0x90
mm_fault_error+0x91/0x189
__do_page_fault+0x48e/0x580
do_page_fault+0xe/0x10
page_fault+0x22/0x30
which complains that mem_cgroup_read_stat cannot be called from an atomic
context but mem_cgroup_print_oom_info takes a spinlock. Change
oom_info_lock to a mutex.
This was introduced by 947b3dd1a8 ("memcg, oom: lock
mem_cgroup_print_oom_info").
Signed-off-by: Michal Hocko <mhocko@suse.cz>
Reported-by: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Masayoshi Mizuma reported a bug with the hang of an application under
the memcg limit. It happens on write-protection fault to huge zero page
If we successfully allocate a huge page to replace zero page but hit the
memcg limit we need to split the zero page with split_huge_page_pmd()
and fallback to small pages.
The other part of the problem is that VM_FAULT_OOM has special meaning
in do_huge_pmd_wp_page() context. __handle_mm_fault() expects the page
to be split if it sees VM_FAULT_OOM and it will will retry page fault
handling. This causes an infinite loop if the page was not split.
do_huge_pmd_wp_zero_page_fallback() can return VM_FAULT_OOM if it failed
to allocate one small page, so fallback to small pages will not help.
The solution for this part is to replace VM_FAULT_OOM with
VM_FAULT_FALLBACK is fallback required.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reported-by: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This 444 should have been octal.
Signed-off-by: Joe Perches <joe@perches.com>
Cc: Alessandro Rubini <rubini@gnudd.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
These should have been octal.
Signed-off-by: Joe Perches <joe@perches.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix irq_set_affinity callbacks in the Meta IRQ chip drivers to AND
cpu_online_mask into the cpumask when picking a CPU to vector the
interrupt to.
As Thomas pointed out, the /proc/irq/$N/smp_affinity interface doesn't
filter out offline CPUs, so without this patch if you offline CPU0 and
set an IRQ affinity to 0x3 it vectors the interrupt onto CPU0 even
though it is offline.
Reported-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-metag@vger.kernel.org
Cc: stable@vger.kernel.org
1. Read retry counting was off by one, so if we had a true ECC error (i.e., no
retry voltage threshold would give a clean read), we would end up returning
-EINVAL on the Nth mode instead of -EBADMSG after then (N-1)th mode
2. The OMAP NAND driver had some of its ECC layouts wrong when introduced in
3.13, causing incompatibilities between the bootloader on-flash layout and
the layout expected in Linux. The expected layouts are now documented in
the commit messages, and we plan to add this under Documentation/mtd/nand/
eventually.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.14 (GNU/Linux)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=qKhw
-----END PGP SIGNATURE-----
Merge tag 'for-linus-20140225' of git://git.infradead.org/linux-mtd
Pull MTD fixes from Brian Norris:
"Two main MTD fixes:
1. Read retry counting was off by one, so if we had a true ECC error
(i.e., no retry voltage threshold would give a clean read), we
would end up returning -EINVAL on the Nth mode instead of -EBADMSG
after then (N-1)th mode
2. The OMAP NAND driver had some of its ECC layouts wrong when
introduced in 3.13, causing incompatibilities between the
bootloader on-flash layout and the layout expected in Linux. The
expected layouts are now documented in the commit messages, and we
plan to add this under Documentation/mtd/nand/ eventually"
* tag 'for-linus-20140225' of git://git.infradead.org/linux-mtd:
mtd: nand: omap: fix ecclayout->oobfree->length
mtd: nand: omap: fix ecclayout->oobfree->offset
mtd: nand: omap: fix ecclayout to be in sync with u-boot NAND driver
mtd: nand: fix off-by-one read retry mode counting
Pull m68k update from Geert Uytterhoeven:
- More barrier.h consolidation
- Sched_[gs]etattr() syscalls
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
m68k: Wire up sched_setattr and sched_getattr
m68k: Switch to asm-generic/barrier.h
m68k: Sort arch/m68k/include/asm/Kbuild
- allow booting xtfpga on boards with new uBoot and >128MBytes memory;
- drop nonexistent GPIO32 support from fsf variant;
- don't select USE_GENERIC_SMP_HELPERS;
- enable common clock framework support, set up ethoc clock on xtfpga;
- wire up sched_setattr and sched_getattr syscalls.
- fix system call to spill the processor registers to stack.
- improve kernel macro to spill the processor registers.
- export ccount_freq symbol
- fix undefined symbol warning
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)
iQIcBAABAgAGBQJTDCFLAAoJEI9vqH3mFV2sImUP/itHWSs2w1NJdcQIkrc9y7mK
Y9Fbk/Wcb5th7TgStpVsI49pSFB3NY9AHFd6XPeCLa8/A3UrT+nPuXQt3rpjW0xL
b9vhNOaW02sb8fXeUpC6oXcgwIwdRhMm5SQXFdM8eL30m6vfXUY4gzriMDMRzG8T
WWHqpPEvsicAA7L8ilzM9AR9gnEuyREQQzRDL+KyFSCeOsNrKk2BUo2MYEkxovhJ
8UuJ6WnmnSRA6e6n9LTPEZBy0Q0EJ8shDNHHa8dZuqjbhzy8vyWlDHhNnyuAX67p
rPrBG4UZZk6aQbsj3b6CFBBiwCurH7q6IVIBdAQKDU2d6TY9HYCicH2OcWXbx6Q+
DlKg6FYo40TuAt8wleinZJLaNc1RSooENR/FQD9iQkb8tyu8jtDzXKaMk9Fy8m0e
9dW2GHMHLz+bcfO95KRSaV5qjqILFT7yGrgMvvcbRI8+ytuJbitwf4u5M06LM8JU
69FEESKYjqCqlyXiBQPtY3RNMU8NC1wezu9XE5O5VWWL1ujswoFwa8U/txoKNEXd
r4cTWt0O4LVyKzQl4TvGdZ2wD8hk7BJLSiGqXbmtnBgbE24eD8sT5RN+k2l5X3Za
yVqndvZSOKxcUVfxF6IxIk8TjvVZVbCVSOLOKwbjVItdByuSXF1XPSTQUqcp4iZN
fpOtY+TOzKxFzIndT1rD
=d3x+
-----END PGP SIGNATURE-----
Merge tag 'xtensa-next-20140224' of git://github.com/czankel/xtensa-linux
Pull tensa fixes from Chris Zankel:
"This series includes fixes for potentially serious bugs in the
routines spilling processor registers to stack, as well as other
issues and compiler errors and warnings.
- allow booting xtfpga on boards with new uBoot and >128MBytes memory
- drop nonexistent GPIO32 support from fsf variant
- don't select USE_GENERIC_SMP_HELPERS
- enable common clock framework support, set up ethoc clock on xtfpga
- wire up sched_setattr and sched_getattr syscalls.
- fix system call to spill the processor registers to stack.
- improve kernel macro to spill the processor registers
- export ccount_freq symbol
- fix undefined symbol warning"
* tag 'xtensa-next-20140224' of git://github.com/czankel/xtensa-linux:
xtensa: wire up sched_setattr and sched_getattr syscalls
xtensa: xtfpga: set ethoc clock frequency
xtensa: xtfpga: use common clock framework
xtensa: support common clock framework
xtensa: no need to select USE_GENERIC_SMP_HELPERS
xtensa: fsf: drop nonexistent GPIO32 support
xtensa: don't pass high memory to bootmem allocator
xtensa: fix fast_syscall_spill_registers
xtensa: fix fast_syscall_spill_registers
xtensa: save current register frame in fast_syscall_spill_registers_fixup
xtensa: introduce spill_registers_kernel macro
xtensa: export ccount_freq
xtensa: fix warning '"CONFIG_OF" is not defined'
Since commit 7787380336 "net_dma: mark broken" we no longer pin dma
engines active for the network-receive-offload use case. As a result
the ->free_chan_resources() that occurs after the driver self test no
longer has a NET_DMA induced ->alloc_chan_resources() to back it up. A
late firing irq can lead to ksoftirqd spinning indefinitely due to the
tasklet_disable() performed by ->free_chan_resources(). Only
->alloc_chan_resources() can clear this condition in affected kernels.
This problem has been present since commit 3e037454bc "I/OAT: Add
support for MSI and MSI-X" in 2.6.24, but is now exposed. Given the
NET_DMA use case is deprecated we can revisit moving the driver to use
threaded irqs. For now, just tear down the irq and tasklet properly by:
1/ Disable the irq from triggering the tasklet
2/ Disable the irq from re-arming
3/ Flush inflight interrupts
4/ Flush the timer
5/ Flush inflight tasklets
References:
https://lkml.org/lkml/2014/1/27/282https://lkml.org/lkml/2014/2/19/672
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: <stable@vger.kernel.org>
Reported-by: Mike Galbraith <bitbucket@online.de>
Reported-by: Stanislav Fomichev <stfomichev@yandex-team.ru>
Tested-by: Mike Galbraith <bitbucket@online.de>
Tested-by: Stanislav Fomichev <stfomichev@yandex-team.ru>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Commit 7053aee26a "fsnotify: do not share events between notification
groups" used overflow event statically allocated in a group with the
size of the generic notification event. This causes problems because
some code looks at type specific parts of event structure and gets
confused by a random data it sees there and causes crashes.
Fix the problem by allocating overflow event with type corresponding to
the group type so code cannot get confused.
Signed-off-by: Jan Kara <jack@suse.cz>
If the event queue overflows when we are handling permission event, we
will never get response from userspace. So we must avoid waiting for it.
Change fsnotify_add_notify_event() to return whether overflow has
happened so that we can detect it in fanotify_handle_event() and act
accordingly.
Signed-off-by: Jan Kara <jack@suse.cz>
Currently we didn't initialize event's list head when we removed it from
the event list. Thus a detection whether overflow event is already
queued wasn't working. Fix it by always initializing the list head when
deleting event from a list.
Signed-off-by: Jan Kara <jack@suse.cz>
pci_get_device() decrements the reference count of "from" (last
argument) so when we break off the loop successfully we have only one
device reference - and we don't know which device we have. If we want
a reference to each device, we must take them explicitly and let
the pci_get_device() walk complete to avoid duplicate references.
This is serious, as over-putting device references will cause
the device to eventually disappear. Without this fix, the kernel
crashes after a few insmod/rmmod cycles.
Tested on an Intel S7000FC4UR system with a 7300 chipset.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Link: http://lkml.kernel.org/r/20140224111656.09bbb7ed@endymion.delvare
Cc: Mauro Carvalho Chehab <m.chehab@samsung.com>
Cc: Doug Thompson <dougthompson@xmission.com>
Cc: stable@vger.kernel.org
Signed-off-by: Borislav Petkov <bp@suse.de>
The reference count changes done by pci_get_device can be a little
misleading when the usage diverges from the most common scheme. The
reference count of the device passed as the last parameter is always
decreased, even if the function returns no new device. So if we are
going to try alternative device IDs, we must manually increment the
device reference count before each retry. If we don't, we end up
decreasing the reference count, and after a few modprobe/rmmod cycles
the PCI devices will vanish.
In other words and as Alan put it: without this fix the EDAC code
corrupts the PCI device list.
This fixes kernel bug #50491:
https://bugzilla.kernel.org/show_bug.cgi?id=50491
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Link: http://lkml.kernel.org/r/20140224093927.7659dd9d@endymion.delvare
Reviewed-by: Alan Cox <alan@linux.intel.com>
Cc: Mauro Carvalho Chehab <m.chehab@samsung.com>
Cc: Doug Thompson <dougthompson@xmission.com>
Cc: stable@vger.kernel.org
Signed-off-by: Borislav Petkov <bp@suse.de>
Pull SELinux endianness fix from James Morris.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
SELinux: bigendian problems with filename trans rules
Pull s390 bug fixes from Martin Schwidefsky:
"A couple of s390 bug fixes. The PCI segment boundary issue is a nasty
one as it can lead to data corruption"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/cio: Fix missing subchannels after CHPID configure on
s390/pci/dma: use correct segment boundary size
s390/compat: fix sys_sched_getattr compat wrapper
s390/zcrypt: additional check to avoid overflow in msg-type 6 requests
- allow booting xtfpga on boards with new uBoot and >128MBytes memory;
- drop nonexistent GPIO32 support from fsf variant;
- don't select USE_GENERIC_SMP_HELPERS;
- enable common clock framework support, set up ethoc clock on xtfpga;
- wire up sched_setattr and sched_getattr syscalls.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=XS4m
-----END PGP SIGNATURE-----
Merge tag 'xtensa-for-next-20140221-1' into for_next
Xtensa fixes for 3.14:
- allow booting xtfpga on boards with new uBoot and >128MBytes memory;
- drop nonexistent GPIO32 support from fsf variant;
- don't select USE_GENERIC_SMP_HELPERS;
- enable common clock framework support, set up ethoc clock on xtfpga;
- wire up sched_setattr and sched_getattr syscalls.
Signed-off-by: Chris Zankel <chris@zankel.net>
