Inject a #GP on MOV CR4 if CR4.LA57 is toggled in 64-bit mode, which is
illegal per Intel's SDM:
CR4.LA57
57-bit linear addresses (bit 12 of CR4) ... blah blah blah ...
This bit cannot be modified in IA-32e mode.
Note, the pseudocode for MOV CR doesn't call out the fault condition,
which is likely why the check was missed during initial development.
This is arguably an SDM bug and will hopefully be fixed in future
release of the SDM.
Fixes: fd8cb43373 ("KVM: MMU: Expose the LA57 feature to VM.")
Cc: stable@vger.kernel.org
Reported-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200703021714.5549-1-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Sparse complains on a call to get_compat_sigset, fix it. The "if"
right above explains that sigmask_arg->sigset is basically a
compat_sigset_t.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
- Make sure a vcpu becoming non-resident doesn't race against the doorbell delivery
- Only advertise pvtime if accounting is enabled
- Return the correct error code if reset fails with SVE
- Make sure that pseudo-NMI functions are annotated as __always_inline
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Merge tag 'kvmarm-fixes-5.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into kvm-master
KVM/arm fixes for 5.8, take #2
- Make sure a vcpu becoming non-resident doesn't race against the doorbell delivery
- Only advertise pvtime if accounting is enabled
- Return the correct error code if reset fails with SVE
- Make sure that pseudo-NMI functions are annotated as __always_inline
Bit 8 would be the "global" bit, which does not quite make sense for non-leaf
page table entries. Intel ignores it; AMD ignores it in PDEs and PDPEs, but
reserves it in PML4Es.
Probably, earlier versions of the AMD manual documented it as reserved in PDPEs
as well, and that behavior made it into KVM as well as kvm-unit-tests; fix it.
Cc: stable@vger.kernel.org
Reported-by: Nadav Amit <namit@vmware.com>
Fixes: a0c0feb579 ("KVM: x86: reserve bit 8 of non-leaf PDPEs and PML4Es in 64-bit mode on AMD", 2014-09-03)
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Syzbot reported that:
CPU: 1 PID: 6780 Comm: syz-executor153 Not tainted 5.7.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__apic_accept_irq+0x46/0xb80
Call Trace:
kvm_arch_async_page_present+0x7de/0x9e0
kvm_check_async_pf_completion+0x18d/0x400
kvm_arch_vcpu_ioctl_run+0x18bf/0x69f0
kvm_vcpu_ioctl+0x46a/0xe20
ksys_ioctl+0x11a/0x180
__x64_sys_ioctl+0x6f/0xb0
do_syscall_64+0xf6/0x7d0
entry_SYSCALL_64_after_hwframe+0x49/0xb3
The testcase enables APF mechanism in MSR_KVM_ASYNC_PF_EN with ASYNC_PF_INT
enabled w/o setting MSR_KVM_ASYNC_PF_INT before, what's worse, interrupt
based APF 'page ready' event delivery depends on in kernel lapic, however,
we didn't bail out when lapic is not in kernel during guest setting
MSR_KVM_ASYNC_PF_EN which causes the null-ptr-deref in host later.
This patch fixes it.
Reported-by: syzbot+1bf777dfdde86d64b89b@syzkaller.appspotmail.com
Fixes: 2635b5c4a0 (KVM: x86: interrupt based APF 'page ready' event delivery)
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Message-Id: <1593426391-8231-1-git-send-email-wanpengli@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
allocation (32kb) for each guest start/restart which can result in OOM
killer activity when kernel memory is fragmented enough.
This fix reduces the number of iopins as s390 doesn't use them, hence
reducing the memory footprint.
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Merge tag 'kvm-s390-master-5.8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into kvm-master
The current number of KVM_IRQCHIP_NUM_PINS results in an order 3
allocation (32kb) for each guest start/restart which can result in OOM
killer activity when kernel memory is fragmented enough.
This fix reduces the number of iopins as s390 doesn't use them, hence
reducing the memory footprint.
When making a vPE non-resident because it has hit a blocking WFI,
the doorbell can fire at any time after the write to the RD.
Crucially, it can fire right between the write to GICR_VPENDBASER
and the write to the pending_last field in the its_vpe structure.
This means that we would overwrite pending_last with stale data,
and potentially not wakeup until some unrelated event (such as
a timer interrupt) puts the vPE back on the CPU.
GICv4 isn't affected by this as we actively mask the doorbell on
entering the guest, while GICv4.1 automatically manages doorbell
delivery without any hypervisor-driven masking.
Use the vpe_lock to synchronize such update, which solves the
problem altogether.
Fixes: ae699ad348 ("irqchip/gic-v4.1: Move doorbell management to the GICv4 abstraction layer")
Reported-by: Zenghui Yu <yuzenghui@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Remove vcpu_vmx.host_pkru, which got left behind when PKRU support was
moved to common x86 code.
No functional change intended.
Fixes: 37486135d3 ("KVM: x86: Fix pkru save/restore when guest CR4.PKE=0, move it to x86.c")
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200617034123.25647-1-sean.j.christopherson@intel.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The Linux TSC calibration procedure is subject to small variations
(its common to see +-1 kHz difference between reboots on a given CPU, for example).
So migrating a guest between two hosts with identical processor can fail, in case
of a small variation in calibrated TSC between them.
Without TSC scaling, the current kernel interface will either return an error
(if user_tsc_khz <= tsc_khz) or enable TSC catchup mode.
This change enables the following TSC tolerance check to
accept KVM_SET_TSC_KHZ within tsc_tolerance_ppm (which is 250ppm by default).
/*
* Compute the variation in TSC rate which is acceptable
* within the range of tolerance and decide if the
* rate being applied is within that bounds of the hardware
* rate. If so, no scaling or compensation need be done.
*/
thresh_lo = adjust_tsc_khz(tsc_khz, -tsc_tolerance_ppm);
thresh_hi = adjust_tsc_khz(tsc_khz, tsc_tolerance_ppm);
if (user_tsc_khz < thresh_lo || user_tsc_khz > thresh_hi) {
pr_debug("kvm: requested TSC rate %u falls outside tolerance [%u,%u]\n", user_tsc_khz, thresh_lo, thresh_hi);
use_scaling = 1;
}
NTP daemon in the guest can correct this difference (NTP can correct upto 500ppm).
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Message-Id: <20200616114741.GA298183@fuller.cnet>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Only MSR address range 0x800 through 0x8ff is architecturally reserved
and dedicated for accessing APIC registers in x2APIC mode.
Fixes: 0105d1a526 ("KVM: x2apic interface to lapic")
Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
Message-Id: <20200616073307.16440-1-xiaoyao.li@intel.com>
Cc: stable@vger.kernel.org
Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Remove support for context switching between the guest's and host's
desired UMWAIT_CONTROL. Propagating the guest's value to hardware isn't
required for correct functionality, e.g. KVM intercepts reads and writes
to the MSR, and the latency effects of the settings controlled by the
MSR are not architecturally visible.
As a general rule, KVM should not allow the guest to control power
management settings unless explicitly enabled by userspace, e.g. see
KVM_CAP_X86_DISABLE_EXITS. E.g. Intel's SDM explicitly states that C0.2
can improve the performance of SMT siblings. A devious guest could
disable C0.2 so as to improve the performance of their workloads at the
detriment to workloads running in the host or on other VMs.
Wholesale removal of UMWAIT_CONTROL context switching also fixes a race
condition where updates from the host may cause KVM to enter the guest
with the incorrect value. Because updates are are propagated to all
CPUs via IPI (SMP function callback), the value in hardware may be
stale with respect to the cached value and KVM could enter the guest
with the wrong value in hardware. As above, the guest can't observe the
bad value, but it's a weird and confusing wart in the implementation.
Removal also fixes the unnecessary usage of VMX's atomic load/store MSR
lists. Using the lists is only necessary for MSRs that are required for
correct functionality immediately upon VM-Enter/VM-Exit, e.g. EFER on
old hardware, or for MSRs that need to-the-uop precision, e.g. perf
related MSRs. For UMWAIT_CONTROL, the effects are only visible in the
kernel via TPAUSE/delay(), and KVM doesn't do any form of delay in
vcpu_vmx_run(). Using the atomic lists is undesirable as they are more
expensive than direct RDMSR/WRMSR.
Furthermore, even if giving the guest control of the MSR is legitimate,
e.g. in pass-through scenarios, it's not clear that the benefits would
outweigh the overhead. E.g. saving and restoring an MSR across a VMX
roundtrip costs ~250 cycles, and if the guest diverged from the host
that cost would be paid on every run of the guest. In other words, if
there is a legitimate use case then it should be enabled by a new
per-VM capability.
Note, KVM still needs to emulate MSR_IA32_UMWAIT_CONTROL so that it can
correctly expose other WAITPKG features to the guest, e.g. TPAUSE,
UMWAIT and UMONITOR.
Fixes: 6e3ba4abce ("KVM: vmx: Emulate MSR IA32_UMWAIT_CONTROL")
Cc: stable@vger.kernel.org
Cc: Jingqi Liu <jingqi.liu@intel.com>
Cc: Tao Xu <tao3.xu@intel.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200623005135.10414-1-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Explicitly pass the L2 GPA to kvm_arch_write_log_dirty(), which for all
intents and purposes is vmx_write_pml_buffer(), instead of having the
latter pull the GPA from vmcs.GUEST_PHYSICAL_ADDRESS. If the dirty bit
update is the result of KVM emulation (rare for L2), then the GPA in the
VMCS may be stale and/or hold a completely unrelated GPA.
Fixes: c5f983f6e8 ("nVMX: Implement emulated Page Modification Logging")
Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200622215832.22090-2-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
translate_gpa() returns a GPA, assigning it to 'real_gfn' seems obviously
wrong. There is no real issue because both 'gpa_t' and 'gfn_t' are u64 and
we don't use the value in 'real_gfn' as a GFN, we do
real_gfn = gpa_to_gfn(real_gfn);
instead. 'If you see a "buffalo" sign on an elephant's cage, do not trust
your eyes', but let's fix it for good.
No functional change intended.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20200622151435.752560-1-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The following race can cause lost map update events:
cpu1 cpu2
apic_map_dirty = true
------------------------------------------------------------
kvm_recalculate_apic_map:
pass check
mutex_lock(&kvm->arch.apic_map_lock);
if (!kvm->arch.apic_map_dirty)
and in process of updating map
-------------------------------------------------------------
other calls to
apic_map_dirty = true might be too late for affected cpu
-------------------------------------------------------------
apic_map_dirty = false
-------------------------------------------------------------
kvm_recalculate_apic_map:
bail out on
if (!kvm->arch.apic_map_dirty)
To fix it, record the beginning of an update of the APIC map in
apic_map_dirty. If another APIC map change switches apic_map_dirty
back to DIRTY during the update, kvm_recalculate_apic_map should not
make it CLEAN, and the other caller will go through the slow path.
Reported-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Guest fails to online hotplugged CPU with error
smpboot: do_boot_cpu failed(-1) to wakeup CPU#4
It's caused by the fact that kvm_apic_set_state(), which used to call
recalculate_apic_map() unconditionally and pulled hotplugged CPU into
apic map, is updating map conditionally on state changes. In this case
the APIC map is not considered dirty and the is not updated.
Fix the issue by forcing unconditional update from kvm_apic_set_state(),
like it used to be.
Fixes: 4abaffce4d ("KVM: LAPIC: Recalculate apic map in batch")
Cc: stable@vger.kernel.org
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20200622160830.426022-1-imammedo@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Ensure we're actually accounting run_delay before we claim that we'll
expose it to the guest. If we're not, then we just pretend like steal
time isn't supported in order to avoid any confusion.
Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200622142710.18677-1-drjones@redhat.com
If SVE is enabled then 'ret' can be assigned the return value of
kvm_vcpu_enable_sve() which may be 0 causing future "goto out" sites to
erroneously return 0 on failure rather than -EINVAL as expected.
Remove the initialisation of 'ret' and make setting the return value
explicit to avoid this situation in the future.
Fixes: 9a3cdf26e3 ("KVM: arm64/sve: Allow userspace to enable SVE for vcpus")
Cc: stable@vger.kernel.org
Reported-by: James Morse <james.morse@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200617105456.28245-1-steven.price@arm.com
The "inline" keyword is a hint for the compiler to inline a function. The
functions system_uses_irq_prio_masking() and gic_write_pmr() are used by
the code running at EL2 on a non-VHE system, so mark them as
__always_inline to make sure they'll always be part of the .hyp.text
section.
This fixes the following splat when trying to run a VM:
[ 47.625273] Kernel panic - not syncing: HYP panic:
[ 47.625273] PS:a00003c9 PC:0000ca0b42049fc4 ESR:86000006
[ 47.625273] FAR:0000ca0b42049fc4 HPFAR:0000000010001000 PAR:0000000000000000
[ 47.625273] VCPU:0000000000000000
[ 47.647261] CPU: 1 PID: 217 Comm: kvm-vcpu-0 Not tainted 5.8.0-rc1-ARCH+ #61
[ 47.654508] Hardware name: Globalscale Marvell ESPRESSOBin Board (DT)
[ 47.661139] Call trace:
[ 47.663659] dump_backtrace+0x0/0x1cc
[ 47.667413] show_stack+0x18/0x24
[ 47.670822] dump_stack+0xb8/0x108
[ 47.674312] panic+0x124/0x2f4
[ 47.677446] panic+0x0/0x2f4
[ 47.680407] SMP: stopping secondary CPUs
[ 47.684439] Kernel Offset: disabled
[ 47.688018] CPU features: 0x240402,20002008
[ 47.692318] Memory Limit: none
[ 47.695465] ---[ end Kernel panic - not syncing: HYP panic:
[ 47.695465] PS:a00003c9 PC:0000ca0b42049fc4 ESR:86000006
[ 47.695465] FAR:0000ca0b42049fc4 HPFAR:0000000010001000 PAR:0000000000000000
[ 47.695465] VCPU:0000000000000000 ]---
The instruction abort was caused by the code running at EL2 trying to fetch
an instruction which wasn't mapped in the EL2 translation tables. Using
objdump showed the two functions as separate symbols in the .text section.
Fixes: 85738e05dc ("arm64: kvm: Unmask PMR before entering guest")
Cc: stable@vger.kernel.org
Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: James Morse <james.morse@arm.com>
Link: https://lore.kernel.org/r/20200618171254.1596055-1-alexandru.elisei@arm.com
Guest crashes are observed on a Cascade Lake system when 'perf top' is
launched on the host, e.g.
BUG: unable to handle kernel paging request at fffffe0000073038
PGD 7ffa7067 P4D 7ffa7067 PUD 7ffa6067 PMD 7ffa5067 PTE ffffffffff120
Oops: 0000 [#1] SMP PTI
CPU: 1 PID: 1 Comm: systemd Not tainted 4.18.0+ #380
...
Call Trace:
serial8250_console_write+0xfe/0x1f0
call_console_drivers.constprop.0+0x9d/0x120
console_unlock+0x1ea/0x460
Call traces are different but the crash is imminent. The problem was
blindly bisected to the commit 041bc42ce2 ("KVM: VMX: Micro-optimize
vmexit time when not exposing PMU"). It was also confirmed that the
issue goes away if PMU is exposed to the guest.
With some instrumentation of the guest we can see what is being switched
(when we do atomic_switch_perf_msrs()):
vmx_vcpu_run: switching 2 msrs
vmx_vcpu_run: switching MSR38f guest: 70000000d host: 70000000f
vmx_vcpu_run: switching MSR3f1 guest: 0 host: 2
The current guess is that PEBS (MSR_IA32_PEBS_ENABLE, 0x3f1) is to blame.
Regardless of whether PMU is exposed to the guest or not, PEBS needs to
be disabled upon switch.
This reverts commit 041bc42ce2.
Reported-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20200619094046.654019-1-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The current number of KVM_IRQCHIP_NUM_PINS results in an order 3
allocation (32kb) for each guest start/restart. This can result in OOM
killer activity even with free swap when the memory is fragmented
enough:
kernel: qemu-system-s39 invoked oom-killer: gfp_mask=0x440dc0(GFP_KERNEL_ACCOUNT|__GFP_COMP|__GFP_ZERO), order=3, oom_score_adj=0
kernel: CPU: 1 PID: 357274 Comm: qemu-system-s39 Kdump: loaded Not tainted 5.4.0-29-generic #33-Ubuntu
kernel: Hardware name: IBM 8562 T02 Z06 (LPAR)
kernel: Call Trace:
kernel: ([<00000001f848fe2a>] show_stack+0x7a/0xc0)
kernel: [<00000001f8d3437a>] dump_stack+0x8a/0xc0
kernel: [<00000001f8687032>] dump_header+0x62/0x258
kernel: [<00000001f8686122>] oom_kill_process+0x172/0x180
kernel: [<00000001f8686abe>] out_of_memory+0xee/0x580
kernel: [<00000001f86e66b8>] __alloc_pages_slowpath+0xd18/0xe90
kernel: [<00000001f86e6ad4>] __alloc_pages_nodemask+0x2a4/0x320
kernel: [<00000001f86b1ab4>] kmalloc_order+0x34/0xb0
kernel: [<00000001f86b1b62>] kmalloc_order_trace+0x32/0xe0
kernel: [<00000001f84bb806>] kvm_set_irq_routing+0xa6/0x2e0
kernel: [<00000001f84c99a4>] kvm_arch_vm_ioctl+0x544/0x9e0
kernel: [<00000001f84b8936>] kvm_vm_ioctl+0x396/0x760
kernel: [<00000001f875df66>] do_vfs_ioctl+0x376/0x690
kernel: [<00000001f875e304>] ksys_ioctl+0x84/0xb0
kernel: [<00000001f875e39a>] __s390x_sys_ioctl+0x2a/0x40
kernel: [<00000001f8d55424>] system_call+0xd8/0x2c8
As far as I can tell s390x does not use the iopins as we bail our for
anything other than KVM_IRQ_ROUTING_S390_ADAPTER and the chip/pin is
only used for KVM_IRQ_ROUTING_IRQCHIP. So let us use a small number to
reduce the memory footprint.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Link: https://lore.kernel.org/r/20200617083620.5409-1-borntraeger@de.ibm.com
Add is_intr_type() and is_intr_type_n() to consolidate the boilerplate
code for querying a specific type of interrupt given an encoded value
from VMCS.VM_{ENTER,EXIT}_INTR_INFO, with and without an associated
vector respectively.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200609014518.26756-1-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
For some reasons, running a simple qemu-kvm command with KCSAN will
reset AMD hosts. It turns out svm_vcpu_run() could not be instrumented.
Disable it for now.
# /usr/libexec/qemu-kvm -name ubuntu-18.04-server-cloudimg -cpu host
-smp 2 -m 2G -hda ubuntu-18.04-server-cloudimg.qcow2
=== console output ===
Kernel 5.6.0-next-20200408+ on an x86_64
hp-dl385g10-05 login:
<...host reset...>
HPE ProLiant System BIOS A40 v1.20 (03/09/2018)
(C) Copyright 1982-2018 Hewlett Packard Enterprise Development LP
Early system initialization, please wait...
Signed-off-by: Qian Cai <cai@lca.pw>
Message-Id: <20200415153709.1559-1-cai@lca.pw>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
During the KVM merging progress, a CONFIG_CPU_LOONGSON64 guard in commit
7f2a83f1c2 ("KVM: MIPS: Add CPUCFG emulation for Loongson-3")
is missing by accident. So add it to avoid building error.
Fixes: 7f2a83f1c2 ("KVM: MIPS: Add CPUCFG emulation for Loongson-3")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Message-Id: <1592204215-28704-1-git-send-email-chenhc@lemote.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
SafeSetID is capable of making allow/deny decisions for set*uid calls
on a system, and we want to add similar functionality for set*gid
calls. The work to do that is not yet complete, so probably won't make
it in for v5.8, but we are looking to get this simple patch in for
v5.8 since we have it ready. We are planning on the rest of the work
for extending the SafeSetID LSM being merged during the v5.9 merge
window.
This patch was sent to the security mailing list and there were no objections.
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Merge tag 'LSM-add-setgid-hook-5.8-author-fix' of git://github.com/micah-morton/linux
Pull SafeSetID update from Micah Morton:
"Add additional LSM hooks for SafeSetID
SafeSetID is capable of making allow/deny decisions for set*uid calls
on a system, and we want to add similar functionality for set*gid
calls.
The work to do that is not yet complete, so probably won't make it in
for v5.8, but we are looking to get this simple patch in for v5.8
since we have it ready.
We are planning on the rest of the work for extending the SafeSetID
LSM being merged during the v5.9 merge window"
* tag 'LSM-add-setgid-hook-5.8-author-fix' of git://github.com/micah-morton/linux:
security: Add LSM hooks to set*gid syscalls
The SafeSetID LSM uses the security_task_fix_setuid hook to filter
set*uid() syscalls according to its configured security policy. In
preparation for adding analagous support in the LSM for set*gid()
syscalls, we add the requisite hook here. Tested by putting print
statements in the security_task_fix_setgid hook and seeing them get hit
during kernel boot.
Signed-off-by: Thomas Cedeno <thomascedeno@google.com>
Signed-off-by: Micah Morton <mortonm@chromium.org>
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Merge tag 'for-5.8-part2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs updates from David Sterba:
"This reverts the direct io port to iomap infrastructure of btrfs
merged in the first pull request. We found problems in invalidate page
that don't seem to be fixable as regressions or without changing iomap
code that would not affect other filesystems.
There are four reverts in total, but three of them are followup
cleanups needed to revert a43a67a2d7 cleanly. The result is the
buffer head based implementation of direct io.
Reverts are not great, but under current circumstances I don't see
better options"
* tag 'for-5.8-part2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
Revert "btrfs: switch to iomap_dio_rw() for dio"
Revert "fs: remove dio_end_io()"
Revert "btrfs: remove BTRFS_INODE_READDIO_NEED_LOCK"
Revert "btrfs: split btrfs_direct_IO to read and write part"
Pull networking fixes from David Miller:
1) Fix cfg80211 deadlock, from Johannes Berg.
2) RXRPC fails to send norigications, from David Howells.
3) MPTCP RM_ADDR parsing has an off by one pointer error, fix from
Geliang Tang.
4) Fix crash when using MSG_PEEK with sockmap, from Anny Hu.
5) The ucc_geth driver needs __netdev_watchdog_up exported, from
Valentin Longchamp.
6) Fix hashtable memory leak in dccp, from Wang Hai.
7) Fix how nexthops are marked as FDB nexthops, from David Ahern.
8) Fix mptcp races between shutdown and recvmsg, from Paolo Abeni.
9) Fix crashes in tipc_disc_rcv(), from Tuong Lien.
10) Fix link speed reporting in iavf driver, from Brett Creeley.
11) When a channel is used for XSK and then reused again later for XSK,
we forget to clear out the relevant data structures in mlx5 which
causes all kinds of problems. Fix from Maxim Mikityanskiy.
12) Fix memory leak in genetlink, from Cong Wang.
13) Disallow sockmap attachments to UDP sockets, it simply won't work.
From Lorenz Bauer.
* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (83 commits)
net: ethernet: ti: ale: fix allmulti for nu type ale
net: ethernet: ti: am65-cpsw-nuss: fix ale parameters init
net: atm: Remove the error message according to the atomic context
bpf: Undo internal BPF_PROBE_MEM in BPF insns dump
libbpf: Support pre-initializing .bss global variables
tools/bpftool: Fix skeleton codegen
bpf: Fix memlock accounting for sock_hash
bpf: sockmap: Don't attach programs to UDP sockets
bpf: tcp: Recv() should return 0 when the peer socket is closed
ibmvnic: Flush existing work items before device removal
genetlink: clean up family attributes allocations
net: ipa: header pad field only valid for AP->modem endpoint
net: ipa: program upper nibbles of sequencer type
net: ipa: fix modem LAN RX endpoint id
net: ipa: program metadata mask differently
ionic: add pcie_print_link_status
rxrpc: Fix race between incoming ACK parser and retransmitter
net/mlx5: E-Switch, Fix some error pointer dereferences
net/mlx5: Don't fail driver on failure to create debugfs
net/mlx5e: CT: Fix ipv6 nat header rewrite actions
...
This reverts commit a43a67a2d7.
This patch reverts the main part of switching direct io implementation
to iomap infrastructure. There's a problem in invalidate page that
couldn't be solved as regression in this development cycle.
The problem occurs when buffered and direct io are mixed, and the ranges
overlap. Although this is not recommended, filesystems implement
measures or fallbacks to make it somehow work. In this case, fallback to
buffered IO would be an option for btrfs (this already happens when
direct io is done on compressed data), but the change would be needed in
the iomap code, bringing new semantics to other filesystems.
Another problem arises when again the buffered and direct ios are mixed,
invalidation fails, then -EIO is set on the mapping and fsync will fail,
though there's no real error.
There have been discussions how to fix that, but revert seems to be the
least intrusive option.
Link: https://lore.kernel.org/linux-btrfs/20200528192103.xm45qoxqmkw7i5yl@fiona/
Signed-off-by: David Sterba <dsterba@suse.com>
On AM65xx MCU CPSW2G NUSS and 66AK2E/L NUSS allmulti setting does not allow
unregistered mcast packets to pass.
This happens, because ALE VLAN entries on these SoCs do not contain port
masks for reg/unreg mcast packets, but instead store indexes of
ALE_VLAN_MASK_MUXx_REG registers which intended for store port masks for
reg/unreg mcast packets.
This path was missed by commit 9d1f644727 ("net: ethernet: ti: ale: fix
seeing unreg mcast packets with promisc and allmulti disabled").
Hence, fix it by taking into account ALE type in cpsw_ale_set_allmulti().
Fixes: 9d1f644727 ("net: ethernet: ti: ale: fix seeing unreg mcast packets with promisc and allmulti disabled")
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The ALE parameters structure is created on stack, so it has to be reset
before passing to cpsw_ale_create() to avoid garbage values.
Fixes: 93a7653031 ("net: ethernet: ti: introduce am65x/j721e gigabit eth subsystem driver")
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Alexei Starovoitov says:
====================
pull-request: bpf 2020-06-12
The following pull-request contains BPF updates for your *net* tree.
We've added 26 non-merge commits during the last 10 day(s) which contain
a total of 27 files changed, 348 insertions(+), 93 deletions(-).
The main changes are:
1) sock_hash accounting fix, from Andrey.
2) libbpf fix and probe_mem sanitizing, from Andrii.
3) sock_hash fixes, from Jakub.
4) devmap_val fix, from Jesper.
5) load_bytes_relative fix, from YiFei.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Looking into the context (atomic!) and the error message should be dropped.
Signed-off-by: Liao Pingfang <liao.pingfang@zte.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Merge tag '5.8-rc-smb3-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6
Pull more cifs updates from Steve French:
"12 cifs/smb3 fixes, 2 for stable.
- add support for idsfromsid on create and chgrp/chown allowing
ability to save owner information more naturally for some workloads
- improve query info (getattr) when SMB3.1.1 posix extensions are
negotiated by using new query info level"
* tag '5.8-rc-smb3-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6:
smb3: Add debug message for new file creation with idsfromsid mount option
cifs: fix chown and chgrp when idsfromsid mount option enabled
smb3: allow uid and gid owners to be set on create with idsfromsid mount option
smb311: Add tracepoints for new compound posix query info
smb311: add support for using info level for posix extensions query
smb311: Add support for lookup with posix extensions query info
smb311: Add support for SMB311 query info (non-compounded)
SMB311: Add support for query info using posix extensions (level 100)
smb3: add indatalen that can be a non-zero value to calculation of credit charge in smb2 ioctl
smb3: fix typo in mount options displayed in /proc/mounts
cifs: Add get_security_type_str function to return sec type.
smb3: extend fscache mount volume coherency check
I'm not convinced the script makes useful automaed help lines anyway,
but since we're trying to deprecate the use of "---help---" in Kconfig
files, let's fix the doc example code too.
See commit a7f7f6248d ("treewide: replace '---help---' in Kconfig
files with 'help'")
Cc: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
- fix build rules in binderfs sample
- fix build errors when Kbuild recurses to the top Makefile
- covert '---help---' in Kconfig to 'help'
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Merge tag 'kbuild-v5.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull more Kbuild updates from Masahiro Yamada:
- fix build rules in binderfs sample
- fix build errors when Kbuild recurses to the top Makefile
- covert '---help---' in Kconfig to 'help'
* tag 'kbuild-v5.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
treewide: replace '---help---' in Kconfig files with 'help'
kbuild: fix broken builds because of GZIP,BZIP2,LZOP variables
samples: binderfs: really compile this sample and fix build issues
This is the set of changes collected since just before the merge
window opened. It's mostly minor fixes in drivers. The one
non-driver set is the three optical disk (sr) changes where two are
error path fixes and one is a helper conversion. The big driver
change is the hpsa compat_alloc_userspace rework by Al so he can kill
the remaining user. This has been tested and acked by the maintainer.
Signed-off-by: James E.J. Bottomley <jejb@linux.ibm.com>
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Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull more SCSI updates from James Bottomley:
"This is the set of changes collected since just before the merge
window opened. It's mostly minor fixes in drivers.
The one non-driver set is the three optical disk (sr) changes where
two are error path fixes and one is a helper conversion.
The big driver change is the hpsa compat_alloc_userspace rework by Al
so he can kill the remaining user. This has been tested and acked by
the maintainer"
* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (21 commits)
scsi: acornscsi: Fix an error handling path in acornscsi_probe()
scsi: storvsc: Remove memset before memory freeing in storvsc_suspend()
scsi: cxlflash: Remove an unnecessary NULL check
scsi: ibmvscsi: Don't send host info in adapter info MAD after LPM
scsi: sr: Fix sr_probe() missing deallocate of device minor
scsi: sr: Fix sr_probe() missing mutex_destroy
scsi: st: Convert convert get_user_pages() --> pin_user_pages()
scsi: target: Rename target_setup_cmd_from_cdb() to target_cmd_parse_cdb()
scsi: target: Fix NULL pointer dereference
scsi: target: Initialize LUN in transport_init_se_cmd()
scsi: target: Factor out a new helper, target_cmd_init_cdb()
scsi: hpsa: hpsa_ioctl(): Tidy up a bit
scsi: hpsa: Get rid of compat_alloc_user_space()
scsi: hpsa: Don't bother with vmalloc for BIG_IOCTL_Command_struct
scsi: hpsa: Lift {BIG_,}IOCTL_Command_struct copy{in,out} into hpsa_ioctl()
scsi: ufs: Remove redundant urgent_bkop_lvl initialization
scsi: ufs: Don't update urgent bkops level when toggling auto bkops
scsi: qedf: Remove redundant initialization of variable rc
scsi: mpt3sas: Fix memset() in non-RDPQ mode
scsi: iscsi: Fix reference count leak in iscsi_boot_create_kobj
...
Pull i2c updates from Wolfram Sang:
"I2C has quite some patches for you this time. I hope it is the move to
per-driver-maintainers which is now showing results. We will see.
The big news is two new drivers (Nuvoton NPCM and Qualcomm CCI),
larger refactoring of the Designware, Tegra, and PXA drivers, the
Cadence driver supports being a slave now, and there is support to
instanciate SPD eeproms for well-known cases (which will be
user-visible because the i801 driver supports it), and some
devm_platform_ioremap_resource() conversions which blow up the
diffstat.
Note that I applied the Nuvoton driver quite late, so some minor fixup
patches arrived during the merge window. I chose to apply them right
away because they were trivial"
* 'i2c/for-5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (109 commits)
i2c: Drop stray comma in MODULE_AUTHOR statements
i2c: npcm7xx: npcm_i2caddr[] can be static
MAINTAINERS: npcm7xx: Add maintainer for Nuvoton NPCM BMC
i2c: npcm7xx: Fix a couple of error codes in probe
i2c: icy: Fix build with CONFIG_AMIGA_PCMCIA=n
i2c: npcm7xx: Remove unnecessary parentheses
i2c: npcm7xx: Add support for slave mode for Nuvoton
i2c: npcm7xx: Add Nuvoton NPCM I2C controller driver
dt-bindings: i2c: npcm7xx: add NPCM I2C controller
i2c: pxa: don't error out if there's no pinctrl
i2c: add 'single-master' property to generic bindings
i2c: designware: Add Baikal-T1 System I2C support
i2c: designware: Move reg-space remapping into a dedicated function
i2c: designware: Retrieve quirk flags as early as possible
i2c: designware: Convert driver to using regmap API
i2c: designware: Discard Cherry Trail model flag
i2c: designware: Add Baytrail sem config DW I2C platform dependency
i2c: designware: slave: Set DW I2C core module dependency
i2c: designware: Use `-y` to build multi-object modules
dt-bindings: i2c: dw: Add Baikal-T1 SoC I2C controller
...
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Merge tag 'media/v5.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull more media updates from Mauro Carvalho Chehab:
- a set of atomisp patches. They remove several abstraction layers, and
fixes clang and gcc warnings (that were hidden via some macros that
were disabling 4 or 5 types of warnings there). There are also some
important fixes and sensor auto-detection on newer BIOSes via ACPI
_DCM tables.
- some fixes
* tag 'media/v5.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (95 commits)
media: rkvdec: Fix H264 scaling list order
media: v4l2-ctrls: Unset correct HEVC loop filter flag
media: videobuf2-dma-contig: fix bad kfree in vb2_dma_contig_clear_max_seg_size
media: v4l2-subdev.rst: correct information about v4l2 events
media: s5p-mfc: Properly handle dma_parms for the allocated devices
media: medium: cec: Make MEDIA_CEC_SUPPORT default to n if !MEDIA_SUPPORT
media: cedrus: Implement runtime PM
media: cedrus: Program output format during each run
media: atomisp: improve ACPI/DMI detection logs
media: Revert "media: atomisp: add Asus Transform T101HA ACPI vars"
media: Revert "media: atomisp: Add some ACPI detection info"
media: atomisp: improve sensor detection code to use _DSM table
media: atomisp: get rid of an iomem abstraction layer
media: atomisp: get rid of a string_support.h abstraction layer
media: atomisp: use strscpy() instead of less secure variants
media: atomisp: set DFS to MAX if sensor doesn't report fps
media: atomisp: use different dfs failed messages
media: atomisp: change the detection of ISP2401 at runtime
media: atomisp: use macros from intel-family.h
media: atomisp: don't set hpll_freq twice with different values
...
- Small collection of cleanups to rework usage of ->queuedata and the
GUID api.
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Merge tag 'libnvdimm-for-5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm updates from Dan Williams:
"Small collection of cleanups to rework usage of ->queuedata and the
GUID api"
* tag 'libnvdimm-for-5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
nvdimm/pmem: stop using ->queuedata
nvdimm/btt: stop using ->queuedata
nvdimm/blk: stop using ->queuedata
libnvdimm: Replace guid_copy() with import_guid() where it makes sense
- Fix an integer overflow problem in the unshare actor.
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Merge tag 'iomap-5.8-merge-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull iomap fix from Darrick Wong:
"A single iomap bug fix for a variable type mistake on 32-bit
architectures, fixing an integer overflow problem in the unshare
actor"
* tag 'iomap-5.8-merge-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
iomap: Fix unsharing of an extent >2GB on a 32-bit machine
- Fix a resource leak on an error bailout.
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Merge tag 'xfs-5.8-merge-9' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull xfs fix from Darrick Wong:
"We've settled down into the bugfix phase; this one fixes a resource
leak on an error bailout path"
* tag 'xfs-5.8-merge-9' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: Add the missed xfs_perag_put() for xfs_ifree_cluster()
Only one commit - increase the size of the ring used for xen transport.
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Merge tag '9p-for-5.8' of git://github.com/martinetd/linux
Pull 9p update from Dominique Martinet:
"Another very quiet cycle... Only one commit: increase the size of the
ring used for xen transport"
* tag '9p-for-5.8' of git://github.com/martinetd/linux:
9p/xen: increase XEN_9PFS_RING_ORDER
One fix for a recent change which broke nested KVM guests on Power9.
Thanks to:
Alexey Kardashevskiy.
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Merge tag 'powerpc-5.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fix from Michael Ellerman:
"One fix for a recent change which broke nested KVM guests on Power9.
Thanks to Alexey Kardashevskiy"
* tag 'powerpc-5.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
KVM: PPC: Fix nested guest RC bits update
- fix for "hex" Kconfig default to use 0x0 rather than 0 to allow
these to be removed from defconfigs
- fix from Ard Biesheuvel for EFI HYP mode booting
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Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
Pull ARM fixes from Russell King:
- fix for "hex" Kconfig default to use 0x0 rather than 0 to allow these
to be removed from defconfigs
- fix from Ard Biesheuvel for EFI HYP mode booting
* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
ARM: 8985/1: efi/decompressor: deal with HYP mode boot gracefully
ARM: 8984/1: Kconfig: set default ZBOOT_ROM_TEXT/BSS value to 0x0
One patch found wile I was getting the glibc port ready:
- Fix issue with clone TLS arg getting overwritten
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Merge tag 'for-linus' of git://github.com/openrisc/linux
Pull OpenRISC update from Stafford Horne:
"One patch found wile I was getting the glibc port ready: fix issue
with clone TLS arg getting overwritten"
* tag 'for-linus' of git://github.com/openrisc/linux:
openrisc: Fix issue with argument clobbering for clone/fork
Pull alpha updates from Matt Turner:
"A few changes for alpha. They're mostly small janitorial fixes but
there's also a build fix and most notably a patch from Mikulas that
fixes a hang on boot on the Avanti platform, which required quite a
bit of work and review"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alpha:
alpha: Fix build around srm_sysrq_reboot_op
alpha: c_next should increase position index
alpha: Replace sg++ with sg = sg_next(sg)
alpha: fix memory barriers so that they conform to the specification
alpha: remove unneeded semicolon in sys_eiger.c
alpha: remove unneeded semicolon in osf_sys.c
alpha: Replace strncmp with str_has_prefix
alpha: fix rtc port ranges
alpha: Kconfig: pedantic formatting
* Unmap a whole guest page if an MCE is encountered in it to avoid
follow-on MCEs leading to the guest crashing, by Tony Luck.
This change collided with the entry changes and the merge resolution
would have been rather unpleasant. To avoid that the entry branch was
merged in before applying this. The resulting code did not change
over the rebase.
* AMD MCE error thresholding machinery cleanup and hotplug sanitization, by
Thomas Gleixner.
* Change the MCE notifiers to denote whether they have handled the error
and not break the chain early by returning NOTIFY_STOP, thus giving the
opportunity for the later handlers in the chain to see it. By Tony Luck.
* Add AMD family 0x17, models 0x60-6f support, by Alexander Monakov.
* Last but not least, the usual round of fixes and improvements.
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Merge tag 'ras-core-2020-06-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 RAS updates from Thomas Gleixner:
"RAS updates from Borislav Petkov:
- Unmap a whole guest page if an MCE is encountered in it to avoid
follow-on MCEs leading to the guest crashing, by Tony Luck.
This change collided with the entry changes and the merge
resolution would have been rather unpleasant. To avoid that the
entry branch was merged in before applying this. The resulting code
did not change over the rebase.
- AMD MCE error thresholding machinery cleanup and hotplug
sanitization, by Thomas Gleixner.
- Change the MCE notifiers to denote whether they have handled the
error and not break the chain early by returning NOTIFY_STOP, thus
giving the opportunity for the later handlers in the chain to see
it. By Tony Luck.
- Add AMD family 0x17, models 0x60-6f support, by Alexander Monakov.
- Last but not least, the usual round of fixes and improvements"
* tag 'ras-core-2020-06-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
x86/mce/dev-mcelog: Fix -Wstringop-truncation warning about strncpy()
x86/{mce,mm}: Unmap the entire page if the whole page is affected and poisoned
EDAC/amd64: Add AMD family 17h model 60h PCI IDs
hwmon: (k10temp) Add AMD family 17h model 60h PCI match
x86/amd_nb: Add AMD family 17h model 60h PCI IDs
x86/mcelog: Add compat_ioctl for 32-bit mcelog support
x86/mce: Drop bogus comment about mce.kflags
x86/mce: Fixup exception only for the correct MCEs
EDAC: Drop the EDAC report status checks
x86/mce: Add mce=print_all option
x86/mce: Change default MCE logger to check mce->kflags
x86/mce: Fix all mce notifiers to update the mce->kflags bitmask
x86/mce: Add a struct mce.kflags field
x86/mce: Convert the CEC to use the MCE notifier
x86/mce: Rename "first" function as "early"
x86/mce/amd, edac: Remove report_gart_errors
x86/mce/amd: Make threshold bank setting hotplug robust
x86/mce/amd: Cleanup threshold device remove path
x86/mce/amd: Straighten CPU hotplug path
x86/mce/amd: Sanitize thresholding device creation hotplug path
...
