Convert structs ip_map and unix_gid to use RCU protected lookups.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Instead of the reader/writer spinlock, allow cache lookups to use RCU
for looking up entries. This is more efficient since modifications can
occur while other entries are being looked up.
Note that for now, we keep the reader/writer spinlock until all users
have been converted to use RCU-safe freeing of their cache entries.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This is a trivial split into lookup and insert functions, no change in
behavior.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Avoid taking the global auth_domain_lock in most lookups of the auth domain
by adding an RCU protected lookup.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Module removal is RCU safe by design, so we really have no need to
lock the 'authtab[]' array.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Fixes gcc '-Wunused-but-set-variable' warning:
fs/nfsd/vfs.c: In function 'nfsd_create':
fs/nfsd/vfs.c:1279:16: warning:
variable 'dirp' set but not used [-Wunused-but-set-variable]
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Upon receiving a request for async copy, create a new kthread. If we
get asynchronous request, make sure to copy the needed arguments/state
from the stack before starting the copy. Then start the thread and reply
back to the client indicating copy is asynchronous.
nfsd_copy_file_range() will copy in a loop over the total number of
bytes is needed to copy. In case a failure happens in the middle, we
ignore the error and return how much we copied so far. Once done
creating a workitem for the callback workqueue and send CB_OFFLOAD with
the results.
The lifetime of the copy stateid is bound to the vfs copy. This way we
don't need to keep the nfsd_net structure for the callback. We could
keep it around longer so that an OFFLOAD_STATUS that came late would
still get results, but clients should be able to deal without that.
We handle OFFLOAD_CANCEL by sending a signal to the copy thread and
calling kthread_stop.
A client should cancel any ongoing copies before calling DESTROY_CLIENT;
if not, we return a CLIENT_BUSY error.
If the client is destroyed for some other reason (lease expiration, or
server shutdown), we must clean up any ongoing copies ourselves.
Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
[colin.king@canonical.com: fix leak in error case]
[bfields@fieldses.org: remove signalling, merge patches]
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
- Fix OMAP Device Tree compatible strings to match DT
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Merge tag 'mfd-fixes-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
Lee writes:
"MFD fixes for v4.19
- Fix Dialog DA9063 regulator constraints issue causing failure in
probe
- Fix OMAP Device Tree compatible strings to match DT"
* tag 'mfd-fixes-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd:
mfd: omap-usb-host: Fix dts probe of children
mfd: da9063: Fix DT probing with constraints
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Merge tag 'for-linus-4.19d-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Juergen writes:
"xen:
Two small fixes for xen drivers."
* tag 'for-linus-4.19d-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen: issue warning message when out of grant maptrack entries
xen/x86/vpmu: Zero struct pt_regs before calling into sample handling code
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Merge tag 'for-linus-20180922' of git://git.kernel.dk/linux-block
Jens writes:
"Just a single fix in this pull request, fixing a regression in
/proc/diskstats caused by the unification of timestamps."
* tag 'for-linus-20180922' of git://git.kernel.dk/linux-block:
block: use nanosecond resolution for iostat
Thomas writes:
"A set of fixes for x86:
- Resolve the kvmclock regression on AMD systems with memory
encryption enabled. The rework of the kvmclock memory allocation
during early boot results in encrypted storage, which is not
shareable with the hypervisor. Create a new section for this data
which is mapped unencrypted and take care that the later
allocations for shared kvmclock memory is unencrypted as well.
- Fix the build regression in the paravirt code introduced by the
recent spectre v2 updates.
- Ensure that the initial static page tables cover the fixmap space
correctly so early console always works. This worked so far by
chance, but recent modifications to the fixmap layout can -
depending on kernel configuration - move the relevant entries to a
different place which is not covered by the initial static page
tables.
- Address the regressions and issues which got introduced with the
recent extensions to the Intel Recource Director Technology code.
- Update maintainer entries to document reality"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mm: Expand static page table for fixmap space
MAINTAINERS: Add X86 MM entry
x86/intel_rdt: Add Reinette as co-maintainer for RDT
MAINTAINERS: Add Borislav to the x86 maintainers
x86/paravirt: Fix some warning messages
x86/intel_rdt: Fix incorrect loop end condition
x86/intel_rdt: Fix exclusive mode handling of MBA resource
x86/intel_rdt: Fix incorrect loop end condition
x86/intel_rdt: Do not allow pseudo-locking of MBA resource
x86/intel_rdt: Fix unchecked MSR access
x86/intel_rdt: Fix invalid mode warning when multiple resources are managed
x86/intel_rdt: Global closid helper to support future fixes
x86/intel_rdt: Fix size reporting of MBA resource
x86/intel_rdt: Fix data type in parsing callbacks
x86/kvm: Use __bss_decrypted attribute in shared variables
x86/mm: Add .bss..decrypted section to hold shared variables
Thomas writes:
"- Provide a strerror_r wrapper so lib/bpf can be built on systems
without _GNU_SOURCE
- Unbreak the man page generator when building out of tree"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf Documentation: Fix out-of-tree asciidoctor man page generation
tools lib bpf: Provide wrapper for strerror_r to build in !_GNU_SOURCE systems
Thomas writes:
"Make the EFI arm stub device tree loader default on to unbreak
existing EFI boot loaders which do not have DTB support."
* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
efi/libstub/arm: default EFI_ARMSTUB_DTB_LOADER to y
Klaus Kusche reported that the I/O busy time in /proc/diskstats was not
updating properly on 4.18. This is because we started using ktime to
track elapsed time, and we convert nanoseconds to jiffies when we update
the partition counter. However, this gets rounded down, so any I/Os that
take less than a jiffy are not accounted for. Previously in this case,
the value of jiffies would sometimes increment while we were doing I/O,
so at least some I/Os were accounted for.
Let's convert the stats to use nanoseconds internally. We still report
milliseconds as before, now more accurately than ever. The value is
still truncated to 32 bits for backwards compatibility.
Fixes: 522a777566 ("block: consolidate struct request timestamp fields")
Cc: stable@vger.kernel.org
Reported-by: Klaus Kusche <klaus.kusche@computerix.info>
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
- Two fixes for the Intel pin controllers than cause
problems on laptops.
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Merge tag 'pinctrl-v4.19-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Linus writes:
"Pin control fixes for v4.19:
- Two fixes for the Intel pin controllers than cause
problems on laptops."
* tag 'pinctrl-v4.19-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
pinctrl: intel: Do pin translation in other GPIO operations as well
pinctrl: cannonlake: Fix gpio base for GPP-E
I swear I would have sent it the same to Linus! The main cause for
this is that I was on vacation until two weeks ago and it took a while
to sort all the pending patches between 4.19 and 4.20, test them and
so on.
It's mostly small bugfixes and cleanups, mostly around x86 nested
virtualization. One important change, not related to nested
virtualization, is that the ability for the guest kernel to trap CPUID
instructions (in Linux that's the ARCH_SET_CPUID arch_prctl) is now
masked by default. This is because the feature is detected through an
MSR; a very bad idea that Intel seems to like more and more. Some
applications choke if the other fields of that MSR are not initialized
as on real hardware, hence we have to disable the whole MSR by default,
as was the case before Linux 4.12.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Paolo writes:
"It's mostly small bugfixes and cleanups, mostly around x86 nested
virtualization. One important change, not related to nested
virtualization, is that the ability for the guest kernel to trap
CPUID instructions (in Linux that's the ARCH_SET_CPUID arch_prctl) is
now masked by default. This is because the feature is detected
through an MSR; a very bad idea that Intel seems to like more and
more. Some applications choke if the other fields of that MSR are
not initialized as on real hardware, hence we have to disable the
whole MSR by default, as was the case before Linux 4.12."
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (23 commits)
KVM: nVMX: Fix bad cleanup on error of get/set nested state IOCTLs
kvm: selftests: Add platform_info_test
KVM: x86: Control guest reads of MSR_PLATFORM_INFO
KVM: x86: Turbo bits in MSR_PLATFORM_INFO
nVMX x86: Check VPID value on vmentry of L2 guests
nVMX x86: check posted-interrupt descriptor addresss on vmentry of L2
KVM: nVMX: Wake blocked vCPU in guest-mode if pending interrupt in virtual APICv
KVM: VMX: check nested state and CR4.VMXE against SMM
kvm: x86: make kvm_{load|put}_guest_fpu() static
x86/hyper-v: rename ipi_arg_{ex,non_ex} structures
KVM: VMX: use preemption timer to force immediate VMExit
KVM: VMX: modify preemption timer bit only when arming timer
KVM: VMX: immediately mark preemption timer expired only for zero value
KVM: SVM: Switch to bitmap_zalloc()
KVM/MMU: Fix comment in walk_shadow_page_lockless_end()
kvm: selftests: use -pthread instead of -lpthread
KVM: x86: don't reset root in kvm_mmu_setup()
kvm: mmu: Don't read PDPTEs when paging is not enabled
x86/kvm/lapic: always disable MMIO interface in x2APIC mode
KVM: s390: Make huge pages unavailable in ucontrol VMs
...
- A wrong UBIFS assertion in mount code
- Fix for a NULL pointer deref in mount code
- Revert of a bad fix for xattrs
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Merge tag 'upstream-4.19-rc4' of git://git.infradead.org/linux-ubifs
Richard writes:
"This pull request contains fixes for UBIFS:
- A wrong UBIFS assertion in mount code
- Fix for a NULL pointer deref in mount code
- Revert of a bad fix for xattrs"
* tag 'upstream-4.19-rc4' of git://git.infradead.org/linux-ubifs:
Revert "ubifs: xattr: Don't operate on deleted inodes"
ubifs: drop false positive assertion
ubifs: Check for name being NULL while mounting
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Merge tag 'for-linus-20180920' of git://git.kernel.dk/linux-block
Jens writes:
"Storage fixes for 4.19-rc5
- Fix for leaking kernel pointer in floppy ioctl (Andy Whitcroft)
- NVMe pull request from Christoph, and a single ANA log page fix
(Hannes)
- Regression fix for libata qd32 support, where we trigger an illegal
active command transition. This fixes a CD-ROM detection issue that
was reported, but could also trigger premature completion of the
internal tag (me)"
* tag 'for-linus-20180920' of git://git.kernel.dk/linux-block:
floppy: Do not copy a kernel pointer to user memory in FDGETPRM ioctl
libata: mask swap internal and hardware tag
nvme: count all ANA groups for ANA Log page
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Merge tag 'drm-fixes-2018-09-21' of git://anongit.freedesktop.org/drm/drm
David writes:
"drm fixes for 4.19-rc5:
- core: fix debugfs for atomic, fix the check for atomic for
non-modesetting drivers
- amdgpu: adds a new PCI id, some kfd fixes and a sdma fix
- i915: a bunch of GVT fixes.
- vc4: scaling fix
- vmwgfx: modesetting fixes and a old buffer eviction fix
- udl: framebuffer destruction fix
- sun4i: disable on R40 fix until next kernel
- pl111: NULL termination on table fix"
* tag 'drm-fixes-2018-09-21' of git://anongit.freedesktop.org/drm/drm: (21 commits)
drm/amdkfd: Fix ATS capablity was not reported correctly on some APUs
drm/amdkfd: Change the control stack MTYPE from UC to NC on GFX9
drm/amdgpu: Fix SDMA HQD destroy error on gfx_v7
drm/vmwgfx: Fix buffer object eviction
drm/vmwgfx: Don't impose STDU limits on framebuffer size
drm/vmwgfx: limit mode size for all display unit to texture_max
drm/vmwgfx: limit screen size to stdu_max during check_modeset
drm/vmwgfx: don't check for old_crtc_state enable status
drm/amdgpu: add new polaris pci id
drm: sun4i: drop second PLL from A64 HDMI PHY
drm: fix drm_drv_uses_atomic_modeset on non modesetting drivers.
drm/i915/gvt: clear ggtt entries when destroy vgpu
drm/i915/gvt: request srcu_read_lock before checking if one gfn is valid
drm/i915/gvt: Add GEN9_CLKGATE_DIS_4 to default BXT mmio handler
drm/i915/gvt: Init PHY related registers for BXT
drm/atomic: Use drm_drv_uses_atomic_modeset() for debugfs creation
drm/fb-helper: Remove set but not used variable 'connector_funcs'
drm: udl: Destroy framebuffer only if it was initialized
drm/sun4i: Remove R40 display pipeline compatibles
drm/pl111: Make sure of_device_id tables are NULL terminated
...
We met a kernel panic when enabling earlycon, which is due to the fixmap
address of earlycon is not statically setup.
Currently the static fixmap setup in head_64.S only covers 2M virtual
address space, while it actually could be in 4M space with different
kernel configurations, e.g. when VSYSCALL emulation is disabled.
So increase the static space to 4M for now by defining FIXMAP_PMD_NUM to 2,
and add a build time check to ensure that the fixmap is covered by the
initial static page tables.
Fixes: 1ad83c858c ("x86_64,vsyscall: Make vsyscall emulation configurable")
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: kernel test robot <rong.a.chen@intel.com>
Reviewed-by: Juergen Gross <jgross@suse.com> (Xen parts)
Cc: H Peter Anvin <hpa@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andy Lutomirsky <luto@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20180920025828.23699-1-feng.tang@intel.com
9092c71bb7 ("mm: use sc->priority for slab shrink targets") changed the
way that the target slab pressure is calculated and made it
priority-based:
delta = freeable >> priority;
delta *= 4;
do_div(delta, shrinker->seeks);
The problem is that on a default priority (which is 12) no pressure is
applied at all, if the number of potentially reclaimable objects is less
than 4096 (1<<12).
This causes the last objects on slab caches of no longer used cgroups to
(almost) never get reclaimed. It's obviously a waste of memory.
It can be especially painful, if these stale objects are holding a
reference to a dying cgroup. Slab LRU lists are reparented on memcg
offlining, but corresponding objects are still holding a reference to the
dying cgroup. If we don't scan these objects, the dying cgroup can't go
away. Most likely, the parent cgroup hasn't any directly charged objects,
only remaining objects from dying children cgroups. So it can easily hold
a reference to hundreds of dying cgroups.
If there are no big spikes in memory pressure, and new memory cgroups are
created and destroyed periodically, this causes the number of dying
cgroups grow steadily, causing a slow-ish and hard-to-detect memory
"leak". It's not a real leak, as the memory can be eventually reclaimed,
but it could not happen in a real life at all. I've seen hosts with a
steadily climbing number of dying cgroups, which doesn't show any signs of
a decline in months, despite the host is loaded with a production
workload.
It is an obvious waste of memory, and to prevent it, let's apply a minimal
pressure even on small shrinker lists. E.g. if there are freeable
objects, let's scan at least min(freeable, scan_batch) objects.
This fix significantly improves a chance of a dying cgroup to be
reclaimed, and together with some previous patches stops the steady growth
of the dying cgroups number on some of our hosts.
Link: http://lkml.kernel.org/r/20180905230759.12236-1-guro@fb.com
Fixes: 9092c71bb7 ("mm: use sc->priority for slab shrink targets")
Signed-off-by: Roman Gushchin <guro@fb.com>
Acked-by: Rik van Riel <riel@surriel.com>
Cc: Josef Bacik <jbacik@fb.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The 'm' kcore_list item could point to kclist_head, and it is incorrect to
look at m->addr / m->size in this case.
There is no choice but to run through the list of entries for every
address if we did not find any entry in the previous iteration
Reset 'm' to NULL in that case at Omar Sandoval's suggestion.
[akpm@linux-foundation.org: add comment]
Link: http://lkml.kernel.org/r/1536100702-28706-1-git-send-email-asmadeus@codewreck.org
Fixes: bf991c2231 ("proc/kcore: optimize multiple page reads")
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Omar Sandoval <osandov@osandov.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: James Morse <james.morse@arm.com>
Cc: Bhupesh Sharma <bhsharma@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Make the clone and fork syscalls return EAGAIN when the limit on the
number of pids /proc/sys/kernel/pid_max is exceeded.
Currently, when the pid_max limit is exceeded, the kernel will return
ENOSPC from the fork and clone syscalls. This is contrary to the
documented behaviour, which explicitly calls out the pid_max case as one
where EAGAIN should be returned. It also leads to really confusing error
messages in userspace programs which will complain about a lack of disk
space when they fail to create processes/threads for this reason.
This error is being returned because alloc_pid() uses the idr api to find
a new pid; when there are none available, idr_alloc_cyclic() returns
-ENOSPC, and this is being propagated back to userspace.
This behaviour has been broken before, and was explicitly fixed in
commit 35f71bc0a0 ("fork: report pid reservation failure properly"),
so I think -EAGAIN is definitely the right thing to return in this case.
The current behaviour change dates from commit 95846ecf9d ("pid:
replace pid bitmap implementation with IDR AIP") and was I believe
unintentional.
This patch has no impact on the case where allocating a pid fails because
the child reaper for the namespace is dead; that case will still return
-ENOMEM.
Link: http://lkml.kernel.org/r/20180903111016.46461-1-ktsanaktsidis@zendesk.com
Fixes: 95846ecf9d ("pid: replace pid bitmap implementation with IDR AIP")
Signed-off-by: KJ Tsanaktsidis <ktsanaktsidis@zendesk.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Gargi Sharma <gs051095@gmail.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Dave, Andy and Peter are de facto overseing the mm parts of X86. Add an
explicit maintainers entry.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Ingo Molnar <mingo@kernel.org>
Reinette Chatre is doing great job on enabling pseudo-locking and other
features in RDT. Add her as co-maintainer for RDT.
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Reinette Chatre <reinette.chatre@intel.com>
Cc: "H Peter Anvin" <hpa@zytor.com>
Cc: "Tony Luck" <tony.luck@intel.com>
Link: https://lkml.kernel.org/r/1537472228-221799-1-git-send-email-fenghua.yu@intel.com
This reverts commit 11a6fc3dc7.
UBIFS wants to assert that xattr operations are only issued on files
with positive link count. The said patch made this operations return
-ENOENT for unlinked files such that the asserts will no longer trigger.
This was wrong since xattr operations are perfectly fine on unlinked
files.
Instead the assertions need to be fixed/removed.
Cc: <stable@vger.kernel.org>
Fixes: 11a6fc3dc7 ("ubifs: xattr: Don't operate on deleted inodes")
Reported-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
Tested-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Richard Weinberger <richard@nod.at>
The following sequence triggers
ubifs_assert(c, c->lst.taken_empty_lebs > 0);
at the end of ubifs_remount_fs():
mount -t ubifs /dev/ubi0_0 /mnt
echo 1 > /sys/kernel/debug/ubifs/ubi0_0/ro_error
umount /mnt
mount -t ubifs -o ro /dev/ubix_y /mnt
mount -o remount,ro /mnt
The resulting
UBIFS assert failed in ubifs_remount_fs at 1878 (pid 161)
is a false positive. In the case above c->lst.taken_empty_lebs has
never been changed from its initial zero value. This will only happen
when the deferred recovery is done.
Fix this by doing the assertion only when recovery has been done
already.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
The requested device name can be NULL or an empty string.
Check for that and refuse to continue. UBIFS has to do this manually
since we cannot use mount_bdev(), which checks for this condition.
Fixes: 1e51764a3c ("UBIFS: add new flash file system")
Reported-by: syzbot+38bd0f7865e5c6379280@syzkaller.appspotmail.com
Signed-off-by: Richard Weinberger <richard@nod.at>
The handlers of IOCTLs in kvm_arch_vcpu_ioctl() are expected to set
their return value in "r" local var and break out of switch block
when they encounter some error.
This is because vcpu_load() is called before the switch block which
have a proper cleanup of vcpu_put() afterwards.
However, KVM_{GET,SET}_NESTED_STATE IOCTLs handlers just return
immediately on error without performing above mentioned cleanup.
Thus, change these handlers to behave as expected.
Fixes: 8fcc4b5923 ("kvm: nVMX: Introduce KVM_CAP_NESTED_STATE")
Reviewed-by: Mark Kanda <mark.kanda@oracle.com>
Reviewed-by: Patrick Colp <patrick.colp@oracle.com>
Signed-off-by: Liran Alon <liran.alon@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Because CRAT_CU_FLAGS_IOMMU_PRESENT was not set in some BIOS crat, we
need to workaround this.
For future compatibility, we also overwrite the bit in capability according
to the value of needs_iommu_device.
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Yong Zhao <Yong.Zhao@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
CWSR fails on Raven if the control stack is MTYPE_UC, which is used
for regular GART mappings. As a workaround we map it using MTYPE_NC.
The MEC firmware expects the control stack at one page offset from the
start of the MQD so it is part of the MQD allocation on GFXv9. AMDGPU
added a memory allocation flag just for this purpose.
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Yong Zhao <yong.zhao@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
A wrong register bit was examinated for checking SDMA status so it reports
false failures. This typo only appears on gfx_v7. gfx_v8 checks the correct
bit.
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Amber Lin <Amber.Lin@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
For some reason I thought GPIOLIB handles translation from GPIO ranges
to pinctrl pins but it turns out not to be the case. This means that
when GPIOs operations are performed for a pin controller having a custom
GPIO base such as Cannon Lake and Ice Lake incorrect pin number gets
used internally.
Fix this in the same way we did for lock/unlock IRQ operations and
translate the GPIO number to pin before using it.
Fixes: a60eac3239 ("pinctrl: intel: Allow custom GPIO base for pad groups")
Reported-by: Rajat Jain <rajatja@google.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Tested-by: Rajat Jain <rajatja@google.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The final field of a floppy_struct is the field "name", which is a pointer
to a string in kernel memory. The kernel pointer should not be copied to
user memory. The FDGETPRM ioctl copies a floppy_struct to user memory,
including this "name" field. This pointer cannot be used by the user
and it will leak a kernel address to user-space, which will reveal the
location of kernel code and data and undermine KASLR protection.
Model this code after the compat ioctl which copies the returned data
to a previously cleared temporary structure on the stack (excluding the
name pointer) and copy out to userspace from there. As we already have
an inparam union with an appropriate member and that memory is already
cleared even for read only calls make use of that as a temporary store.
Based on an initial patch by Brian Belleville.
CVE-2018-7755
Signed-off-by: Andy Whitcroft <apw@canonical.com>
Broke up long line.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
hen we're comparing the hardware completion mask passed in from the
driver with the internal tag pending mask, we need to account for the
fact that the internal tag is different from the hardware tag. If not,
then we can end up either prematurely completing the internal tag (since
it's not set in the hw mask), or simply flag an error:
ata2: illegal qc_active transition (100000000->00000001)
If the internal tag is set, then swap that with the hardware tag in this
case before comparing with what the hardware reports.
Fixes: 28361c4036 ("libata: add extra internal command")
Buglink: https://bugzilla.kernel.org/show_bug.cgi?id=201151
Cc: stable@vger.kernel.org
Reported-by: Paul Sbarra <sbarra.paul@gmail.com>
Tested-by: Paul Sbarra <sbarra.paul@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
The naked attribute is supported by at least gcc >= 4.6 (for ARM,
which is the only current user), gcc >= 8 (for x86), clang >= 3.1
and icc >= 13. See https://godbolt.org/z/350Dyc
Therefore, move it out of compiler-gcc.h so that the definition
is shared by all compilers.
This also fixes Clang support for ARM32 --- 815f0ddb34
("include/linux/compiler*.h: make compiler-*.h mutually exclusive").
Fixes: 815f0ddb34 ("include/linux/compiler*.h: make compiler-*.h mutually exclusive")
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Eli Friedman <efriedma@codeaurora.org>
Cc: Christopher Li <sparse@chrisli.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Joe Perches <joe@perches.com>
Cc: Dominique Martinet <asmadeus@codewreck.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-sparse@vger.kernel.org
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Stefan Agner <stefan@agner.ch>
Reviewed-by: Stefan Agner <stefan@agner.ch>
Reviewed-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Commit 9c695203a7 ("compiler-gcc.h: gcc-4.5 needs noclone
and noinline on __naked functions") added noinline and noclone
as a workaround for a gcc 4.5 bug, which was resolved in 4.6.0.
Since now the minimum gcc supported version is 4.6,
we can clean it up.
See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44290
and https://godbolt.org/z/h6NMIL
Fixes: 815f0ddb34 ("include/linux/compiler*.h: make compiler-*.h mutually exclusive")
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Eli Friedman <efriedma@codeaurora.org>
Cc: Christopher Li <sparse@chrisli.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Joe Perches <joe@perches.com>
Cc: Dominique Martinet <asmadeus@codewreck.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-sparse@vger.kernel.org
Tested-by: Stefan Agner <stefan@agner.ch>
Reviewed-by: Stefan Agner <stefan@agner.ch>
Reviewed-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
driver
- Make sure of_node_get/put() calls are balanced in the partition
parsing code
- Fix a race in the denali NAND controller driver
- Fix false positive WARN_ON() in the marvell NAND controller driver
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Merge tag 'mtd/fixes-for-4.19-rc5' of git://git.infradead.org/linux-mtd
Boris writes:
"- Fixes a bug in the ->read/write_reg() implementation of the m25p80
driver
- Make sure of_node_get/put() calls are balanced in the partition
parsing code
- Fix a race in the denali NAND controller driver
- Fix false positive WARN_ON() in the marvell NAND controller driver"
* tag 'mtd/fixes-for-4.19-rc5' of git://git.infradead.org/linux-mtd:
mtd: devices: m25p80: Make sure the buffer passed in op is DMA-able
mtd: partitions: fix unbalanced of_node_get/put()
mtd: rawnand: denali: fix a race condition when DMA is kicked
mtd: rawnand: marvell: prevent harmless warnings
here comes a collection of various fixes, mostly for stable-tree
or regression fixes.
Two relatively high LOCs are about the (rather simple) conversion of
uapi integer types in topology API, and a regression fix about HDMI
hotplug notification on AMD HD-audio. The rest are all small
individual fixes like ASoC Intel Skylake race condition, minor
uninitialized page leak in emu10k1 ioctl, Firewire audio error paths,
and so on.
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Merge tag 'sound-4.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Takashi writes:
"sound fixes for 4.19-rc5
here comes a collection of various fixes, mostly for stable-tree
or regression fixes.
Two relatively high LOCs are about the (rather simple) conversion of
uapi integer types in topology API, and a regression fix about HDMI
hotplug notification on AMD HD-audio. The rest are all small
individual fixes like ASoC Intel Skylake race condition, minor
uninitialized page leak in emu10k1 ioctl, Firewire audio error paths,
and so on."
* tag 'sound-4.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (33 commits)
ALSA: fireworks: fix memory leak of response buffer at error path
ALSA: oxfw: fix memory leak of discovered stream formats at error path
ALSA: oxfw: fix memory leak for model-dependent data at error path
ALSA: bebob: fix memory leak for M-Audio FW1814 and ProjectMix I/O at error path
ALSA: hda - Enable runtime PM only for discrete GPU
ALSA: oxfw: fix memory leak of private data
ALSA: firewire-tascam: fix memory leak of private data
ALSA: firewire-digi00x: fix memory leak of private data
sound: don't call skl_init_chip() to reset intel skl soc
sound: enable interrupt after dma buffer initialization
Revert "ASoC: Intel: Skylake: Acquire irq after RIRB allocation"
ALSA: emu10k1: fix possible info leak to userspace on SNDRV_EMU10K1_IOCTL_INFO
ASoC: cs4265: fix MMTLR Data switch control
ASoC: AMD: Ensure reset bit is cleared before configuring
ALSA: fireface: fix memory leak in ff400_switch_fetching_mode()
ALSA: bebob: use address returned by kmalloc() instead of kernel stack for streaming DMA mapping
ASoC: rsnd: don't fallback to PIO mode when -EPROBE_DEFER
ASoC: rsnd: adg: care clock-frequency size
ASoC: uniphier: change status to orphan
ASoC: rsnd: fixup not to call clk_get/set under non-atomic
...
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