wrongly
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Merge tag 'irq_urgent_for_v6.4_rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fix from Borislav Petkov:
- Fix open firmware quirks validation so that they don't get applied
wrongly
* tag 'irq_urgent_for_v6.4_rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/gic: Correctly validate OF quirk descriptors
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Merge tag 'media/v6.4-4' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media fixes from Mauro Carvalho Chehab:
"Some driver fixes:
- a regression fix for the verisilicon driver
- uvcvideo: don't expose unsupported video formats to userspace
- camss-video: don't zero subdev format after init
- mediatek: some fixes for 4K decoder formats
- fix a Sphinx build warning (missing doc for client_caps)
- some fixes for imx and atomisp staging drivers
And two CEC core fixes:
- don't set last_initiator if TX in progress
- disable adapter in cec_devnode_unregister"
* tag 'media/v6.4-4' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
media: uvcvideo: Don't expose unsupported formats to userspace
media: v4l2-subdev: Fix missing kerneldoc for client_caps
media: staging: media: imx: initialize hs_settle to avoid warning
media: v4l2-mc: Drop subdev check in v4l2_create_fwnode_links_to_pad()
media: staging: media: atomisp: init high & low vars
media: cec: core: don't set last_initiator if tx in progress
media: cec: core: disable adapter in cec_devnode_unregister
media: mediatek: vcodec: Only apply 4K frame sizes on decoder formats
media: camss: camss-video: Don't zero subdev format again after initialization
media: verisilicon: Additional fix for the crash when opening the driver
Here are a bunch of tiny char/misc/other driver fixes for 6.4-rc5 that
resolve a number of reported issues. Included in here are:
- iio driver fixes
- fpga driver fixes
- test_firmware bugfixes
- fastrpc driver tiny bugfixes
- MAINTAINERS file updates for some subsystems
All of these have been in linux-next this past week with no reported
issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-6.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver fixes from Greg KH:
"Here are a bunch of tiny char/misc/other driver fixes for 6.4-rc5 that
resolve a number of reported issues. Included in here are:
- iio driver fixes
- fpga driver fixes
- test_firmware bugfixes
- fastrpc driver tiny bugfixes
- MAINTAINERS file updates for some subsystems
All of these have been in linux-next this past week with no reported
issues"
* tag 'char-misc-6.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (34 commits)
test_firmware: fix the memory leak of the allocated firmware buffer
test_firmware: fix a memory leak with reqs buffer
test_firmware: prevent race conditions by a correct implementation of locking
firmware_loader: Fix a NULL vs IS_ERR() check
MAINTAINERS: Vaibhav Gupta is the new ipack maintainer
dt-bindings: fpga: replace Ivan Bornyakov maintainership
MAINTAINERS: update Microchip MPF FPGA reviewers
misc: fastrpc: reject new invocations during device removal
misc: fastrpc: return -EPIPE to invocations on device removal
misc: fastrpc: Reassign memory ownership only for remote heap
misc: fastrpc: Pass proper scm arguments for secure map request
iio: imu: inv_icm42600: fix timestamp reset
iio: adc: ad_sigma_delta: Fix IRQ issue by setting IRQ_DISABLE_UNLAZY flag
dt-bindings: iio: adc: renesas,rcar-gyroadc: Fix adi,ad7476 compatible value
iio: dac: mcp4725: Fix i2c_master_send() return value handling
iio: accel: kx022a fix irq getting
iio: bu27034: Ensure reset is written
iio: dac: build ad5758 driver when AD5758 is selected
iio: addac: ad74413: fix resistance input processing
iio: light: vcnl4035: fixed chip ID check
...
Here are 2 small driver core cacheinfo fixes for 6.4-rc5 that resolve a
number of reported issues with that file. These changes have been in
linux-next this past week with no reported problems.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-6.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core fixes from Greg KH:
"Here are two small driver core cacheinfo fixes for 6.4-rc5 that
resolve a number of reported issues with that file. These changes have
been in linux-next this past week with no reported problems"
* tag 'driver-core-6.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
drivers: base: cacheinfo: Update cpu_map_populated during CPU Hotplug
drivers: base: cacheinfo: Fix shared_cpu_map changes in event of CPU hotplug
Here are some small tty/serial driver fixes for 6.4-rc5 that have all
been in linux-next this past week with no reported problems. Included
in here are:
- 8250_tegra driver bugfix
- fsl uart driver bugfixes
- Kconfig fix for dependancy issue
- dt-bindings fix for the 8250_omap driver
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-6.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial driver fixes from Greg KH:
"Here are some small tty/serial driver fixes for 6.4-rc5 that have all
been in linux-next this past week with no reported problems. Included
in here are:
- 8250_tegra driver bugfix
- fsl uart driver bugfixes
- Kconfig fix for dependancy issue
- dt-bindings fix for the 8250_omap driver"
* tag 'tty-6.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
dt-bindings: serial: 8250_omap: add rs485-rts-active-high
serial: cpm_uart: Fix a COMPILE_TEST dependency
soc: fsl: cpm1: Fix TSA and QMC dependencies in case of COMPILE_TEST
tty: serial: fsl_lpuart: use UARTCTRL_TXINV to send break instead of UARTCTRL_SBK
serial: 8250_tegra: Fix an error handling path in tegra_uart_probe()
Here are some USB driver and core fixes for 6.4-rc5. Most of these are
tiny driver fixes, including:
- udc driver bugfix
- f_fs gadget driver bugfix
- cdns3 driver bugfix
- typec bugfixes
But the "big" thing in here is a fix yet-again for how the USB buffers
are handled from userspace when dealing with DMA issues. The changes
were discussed a lot, and tested a lot, on the list, and acked by the
relevant mm maintainers and have been in linux-next all this past week
with no reported problems.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-6.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are some USB driver and core fixes for 6.4-rc5. Most of these are
tiny driver fixes, including:
- udc driver bugfix
- f_fs gadget driver bugfix
- cdns3 driver bugfix
- typec bugfixes
But the "big" thing in here is a fix yet-again for how the USB buffers
are handled from userspace when dealing with DMA issues. The changes
were discussed a lot, and tested a lot, on the list, and acked by the
relevant mm maintainers and have been in linux-next all this past week
with no reported problems"
* tag 'usb-6.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
usb: typec: tps6598x: Fix broken polling mode after system suspend/resume
mm: page_table_check: Ensure user pages are not slab pages
mm: page_table_check: Make it dependent on EXCLUSIVE_SYSTEM_RAM
usb: usbfs: Use consistent mmap functions
usb: usbfs: Enforce page requirements for mmap
dt-bindings: usb: snps,dwc3: Fix "snps,hsphy_interface" type
usb: gadget: udc: fix NULL dereference in remove()
usb: gadget: f_fs: Add unbind event before functionfs_unbind
usb: cdns3: fix NCM gadget RX speed 20x slow than expection at iMX8QM
* Address some fallout of the locking rework, this time affecting
the way the vgic is configured
* Fix an issue where the page table walker frees a subtree and
then proceeds with walking what it has just freed...
* Check that a given PA donated to the guest is actually memory
(only affecting pKVM)
* Correctly handle MTE CMOs by Set/Way
* Fix the reported address of a watchpoint forwarded to userspace
* Fix the freeing of the root of stage-2 page tables
* Stop creating spurious PMU events to perform detection of the
default PMU and use the existing PMU list instead.
x86:
* Fix a memslot lookup bug in the NX recovery thread that could
theoretically let userspace bypass the NX hugepage mitigation
* Fix a s/BLOCKING/PENDING bug in SVM's vNMI support
* Account exit stats for fastpath VM-Exits that never leave the super
tight run-loop
* Fix an out-of-bounds bug in the optimized APIC map code, and add a
regression test for the race.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm fixes from Paolo Bonzini:
"ARM:
- Address some fallout of the locking rework, this time affecting the
way the vgic is configured
- Fix an issue where the page table walker frees a subtree and then
proceeds with walking what it has just freed...
- Check that a given PA donated to the guest is actually memory (only
affecting pKVM)
- Correctly handle MTE CMOs by Set/Way
- Fix the reported address of a watchpoint forwarded to userspace
- Fix the freeing of the root of stage-2 page tables
- Stop creating spurious PMU events to perform detection of the
default PMU and use the existing PMU list instead
x86:
- Fix a memslot lookup bug in the NX recovery thread that could
theoretically let userspace bypass the NX hugepage mitigation
- Fix a s/BLOCKING/PENDING bug in SVM's vNMI support
- Account exit stats for fastpath VM-Exits that never leave the super
tight run-loop
- Fix an out-of-bounds bug in the optimized APIC map code, and add a
regression test for the race"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: selftests: Add test for race in kvm_recalculate_apic_map()
KVM: x86: Bail from kvm_recalculate_phys_map() if x2APIC ID is out-of-bounds
KVM: x86: Account fastpath-only VM-Exits in vCPU stats
KVM: SVM: vNMI pending bit is V_NMI_PENDING_MASK not V_NMI_BLOCKING_MASK
KVM: x86/mmu: Grab memslot for correct address space in NX recovery worker
KVM: arm64: Document default vPMU behavior on heterogeneous systems
KVM: arm64: Iterate arm_pmus list to probe for default PMU
KVM: arm64: Drop last page ref in kvm_pgtable_stage2_free_removed()
KVM: arm64: Populate fault info for watchpoint
KVM: arm64: Reload PTE after invoking walker callback on preorder traversal
KVM: arm64: Handle trap of tagged Set/Way CMOs
arm64: Add missing Set/Way CMO encodings
KVM: arm64: Prevent unconditional donation of unmapped regions from the host
KVM: arm64: vgic: Fix a comment
KVM: arm64: vgic: Fix locking comment
KVM: arm64: vgic: Wrap vgic_its_create() with config_lock
KVM: arm64: vgic: Fix a circular locking issue
- Fix link errors in new aes-gcm-p10 code when built-in with other drivers.
- Limit number of TCEs passed to H_STUFF_TCE hcall as per spec.
- Use KSYM_NAME_LEN in xmon array size to avoid possible OOB write.
Thanks to: Gaurav Batra, Maninder Singh Vishal Chourasia.
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Merge tag 'powerpc-6.4-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
- Fix link errors in new aes-gcm-p10 code when built-in with other
drivers
- Limit number of TCEs passed to H_STUFF_TCE hcall as per spec
- Use KSYM_NAME_LEN in xmon array size to avoid possible OOB write
Thanks to Gaurav Batra and Maninder Singh Vishal Chourasia.
* tag 'powerpc-6.4-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/xmon: Use KSYM_NAME_LEN in array size
powerpc/iommu: Limit number of TCEs to 512 for H_STUFF_TCE hcall
powerpc/crypto: Fix aes-gcm-p10 link errors
- Fix a memslot lookup bug in the NX recovery thread that could
theoretically let userspace bypass the NX hugepage mitigation
- Fix a s/BLOCKING/PENDING bug in SVM's vNMI support
- Account exit stats for fastpath VM-Exits that never leave the super
tight run-loop
- Fix an out-of-bounds bug in the optimized APIC map code, and add a
regression test for the race.
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Merge tag 'kvm-x86-fixes-6.4' of https://github.com/kvm-x86/linux into HEAD
KVM x86 fixes for 6.4
- Fix a memslot lookup bug in the NX recovery thread that could
theoretically let userspace bypass the NX hugepage mitigation
- Fix a s/BLOCKING/PENDING bug in SVM's vNMI support
- Account exit stats for fastpath VM-Exits that never leave the super
tight run-loop
- Fix an out-of-bounds bug in the optimized APIC map code, and add a
regression test for the race.
- Fix the reported address of a watchpoint forwarded to userspace
- Fix the freeing of the root of stage-2 page tables
- Stop creating spurious PMU events to perform detection of the
default PMU and use the existing PMU list instead.
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Merge tag 'kvmarm-fixes-6.4-3' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/arm64 fixes for 6.4, take #3
- Fix the reported address of a watchpoint forwarded to userspace
- Fix the freeing of the root of stage-2 page tables
- Stop creating spurious PMU events to perform detection of the
default PMU and use the existing PMU list instead.
- Address some fallout of the locking rework, this time affecting
the way the vgic is configured
- Fix an issue where the page table walker frees a subtree and
then proceeds with walking what it has just freed...
- Check that a given PA donated to the gues is actually memory
(only affecting pKVM)
- Correctly handle MTE CMOs by Set/Way
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Merge tag 'kvmarm-fixes-6.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/arm64 fixes for 6.4, take #2
- Address some fallout of the locking rework, this time affecting
the way the vgic is configured
- Fix an issue where the page table walker frees a subtree and
then proceeds with walking what it has just freed...
- Check that a given PA donated to the gues is actually memory
(only affecting pKVM)
- Correctly handle MTE CMOs by Set/Way
Five fixes, all in drivers. The most extensive is the target change to
fix the hang in the login code, which involves changing timers from
per login to per connection.
Signed-off-by: James E.J. Bottomley <jejb@linux.ibm.com>
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"Five fixes, all in drivers.
The most extensive is the target change to fix the hang in the login
code, which involves changing timers from per login to per connection"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: stex: Fix gcc 13 warnings
scsi: qla2xxx: Fix NULL pointer dereference in target mode
scsi: target: iscsi: Prevent login threads from racing between each other
scsi: target: iscsi: Remove unused transport_timer
scsi: target: iscsi: Fix hang in the iSCSI login code
Here's a fix for a regression in 6.4-rc1 which broke the backlight on
machines such as the Lenovo ThinkPad X13s.
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Merge tag 'leds-6.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/johan/linux
Pull LED fix from Johan Hovold:
"Here's a fix for a regression in 6.4-rc1 which broke the backlight on
machines such as the Lenovo ThinkPad X13s"
Acked-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/lkml/20230602091928.GR449117@google.com/
* tag 'leds-6.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/johan/linux:
leds: qcom-lpg: Fix PWM period limits
The introduction of high resolution PWM support changed the order of the
operations in the calculation of min and max period. The result in both
divisions is in most cases a truncation to 0, which limits the period to
the range of [0, 0].
Both numerators (and denominators) are within 64 bits, so the whole
expression can be put directly into the div64_u64, instead of doing it
partially.
Fixes: b00d2ed376 ("leds: rgb: leds-qcom-lpg: Add support for high resolution PWM")
Reviewed-by: Caleb Connolly <caleb.connolly@linaro.org>
Tested-by: Steev Klimaszewski <steev@kali.org>
Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Acked-by: Lee Jones <lee@kernel.org>
Tested-by: Johan Hovold <johan+linaro@kernel.org>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-QRD
Link: https://lore.kernel.org/r/20230515162604.649203-1-quic_bjorande@quicinc.com
Signed-off-by: Johan Hovold <johan@kernel.org>
- Return NULL if the trace_probe list on trace_probe_event is empty.
- selftests/ftrace: Choose testing symbol name for filtering feature
from sample data instead of fixed symbol.
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Merge tag 'probes-fixes-6.4-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull probes fixes from Masami Hiramatsu:
- Return NULL if the trace_probe list on trace_probe_event is empty
- selftests/ftrace: Choose testing symbol name for filtering feature
from sample data instead of fixed symbol
* tag 'probes-fixes-6.4-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
selftests/ftrace: Choose target function for filter test from samples
tracing/probe: trace_probe_primary_from_call(): checked list_first_entry
Keep switching between LAPIC_MODE_X2APIC and LAPIC_MODE_DISABLED during
APIC map construction to hunt for TOCTOU bugs in KVM. KVM's optimized map
recalc makes multiple passes over the list of vCPUs, and the calculations
ignore vCPU's whose APIC is hardware-disabled, i.e. there's a window where
toggling LAPIC_MODE_DISABLED is quite interesting.
Signed-off-by: Michal Luczaj <mhal@rbox.co>
Co-developed-by: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/20230602233250.1014316-4-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Bail from kvm_recalculate_phys_map() and disable the optimized map if the
target vCPU's x2APIC ID is out-of-bounds, i.e. if the vCPU was added
and/or enabled its local APIC after the map was allocated. This fixes an
out-of-bounds access bug in the !x2apic_format path where KVM would write
beyond the end of phys_map.
Check the x2APIC ID regardless of whether or not x2APIC is enabled,
as KVM's hardcodes x2APIC ID to be the vCPU ID, i.e. it can't change, and
the map allocation in kvm_recalculate_apic_map() doesn't check for x2APIC
being enabled, i.e. the check won't get false postivies.
Note, this also affects the x2apic_format path, which previously just
ignored the "x2apic_id > new->max_apic_id" case. That too is arguably a
bug fix, as ignoring the vCPU meant that KVM would not send interrupts to
the vCPU until the next map recalculation. In practice, that "bug" is
likely benign as a newly present vCPU/APIC would immediately trigger a
recalc. But, there's no functional downside to disabling the map, and
a future patch will gracefully handle the -E2BIG case by retrying instead
of simply disabling the optimized map.
Opportunistically add a sanity check on the xAPIC ID size, along with a
comment explaining why the xAPIC ID is guaranteed to be "good".
Reported-by: Michal Luczaj <mhal@rbox.co>
Fixes: 5b84b02917 ("KVM: x86: Honor architectural behavior for aliased 8-bit APIC IDs")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20230602233250.1014316-2-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Increment vcpu->stat.exits when handling a fastpath VM-Exit without
going through any part of the "slow" path. Not bumping the exits stat
can result in wildly misleading exit counts, e.g. if the primary reason
the guest is exiting is to program the TSC deadline timer.
Fixes: 404d5d7bff ("KVM: X86: Introduce more exit_fastpath_completion enum values")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20230602011920.787844-2-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
While testing Hyper-V enabled Windows Server 2019 guests on Zen4 hardware
I noticed that with vCPU count large enough (> 16) they sometimes froze at
boot.
With vCPU count of 64 they never booted successfully - suggesting some kind
of a race condition.
Since adding "vnmi=0" module parameter made these guests boot successfully
it was clear that the problem is most likely (v)NMI-related.
Running kvm-unit-tests quickly showed failing NMI-related tests cases, like
"multiple nmi" and "pending nmi" from apic-split, x2apic and xapic tests
and the NMI parts of eventinj test.
The issue was that once one NMI was being serviced no other NMI was allowed
to be set pending (NMI limit = 0), which was traced to
svm_is_vnmi_pending() wrongly testing for the "NMI blocked" flag rather
than for the "NMI pending" flag.
Fix this by testing for the right flag in svm_is_vnmi_pending().
Once this is done, the NMI-related kvm-unit-tests pass successfully and
the Windows guest no longer freezes at boot.
Fixes: fa4c027a79 ("KVM: x86: Add support for SVM's Virtual NMI")
Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/be4ca192eb0c1e69a210db3009ca984e6a54ae69.1684495380.git.maciej.szmigiero@oracle.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Factor in the address space (non-SMM vs. SMM) of the target shadow page
when recovering potential NX huge pages, otherwise KVM will retrieve the
wrong memslot when zapping shadow pages that were created for SMM. The
bug most visibly manifests as a WARN on the memslot being non-NULL, but
the worst case scenario is that KVM could unaccount the shadow page
without ensuring KVM won't install a huge page, i.e. if the non-SMM slot
is being dirty logged, but the SMM slot is not.
------------[ cut here ]------------
WARNING: CPU: 1 PID: 3911 at arch/x86/kvm/mmu/mmu.c:7015
kvm_nx_huge_page_recovery_worker+0x38c/0x3d0 [kvm]
CPU: 1 PID: 3911 Comm: kvm-nx-lpage-re
RIP: 0010:kvm_nx_huge_page_recovery_worker+0x38c/0x3d0 [kvm]
RSP: 0018:ffff99b284f0be68 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff99b284edd000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff9271397024e0 R08: 0000000000000000 R09: ffff927139702450
R10: 0000000000000000 R11: 0000000000000001 R12: ffff99b284f0be98
R13: 0000000000000000 R14: ffff9270991fcd80 R15: 0000000000000003
FS: 0000000000000000(0000) GS:ffff927f9f640000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0aacad3ae0 CR3: 000000088fc2c005 CR4: 00000000003726e0
Call Trace:
<TASK>
__pfx_kvm_nx_huge_page_recovery_worker+0x10/0x10 [kvm]
kvm_vm_worker_thread+0x106/0x1c0 [kvm]
kthread+0xd9/0x100
ret_from_fork+0x2c/0x50
</TASK>
---[ end trace 0000000000000000 ]---
This bug was exposed by commit edbdb43fc9 ("KVM: x86: Preserve TDP MMU
roots until they are explicitly invalidated"), which allowed KVM to retain
SMM TDP MMU roots effectively indefinitely. Before commit edbdb43fc9,
KVM would zap all SMM TDP MMU roots and thus all SMM TDP MMU shadow pages
once all vCPUs exited SMM, which made the window where this bug (recovering
an SMM NX huge page) could be encountered quite tiny. To hit the bug, the
NX recovery thread would have to run while at least one vCPU was in SMM.
Most VMs typically only use SMM during boot, and so the problematic shadow
pages were gone by the time the NX recovery thread ran.
Now that KVM preserves TDP MMU roots until they are explicitly invalidated
(e.g. by a memslot deletion), the window to trigger the bug is effectively
never closed because most VMMs don't delete memslots after boot (except
for a handful of special scenarios).
Fixes: eb29860570 ("KVM: x86/mmu: Do not recover dirty-tracked NX Huge Pages")
Reported-by: Fabio Coatti <fabio.coatti@gmail.com>
Closes: https://lore.kernel.org/all/CADpTngX9LESCdHVu_2mQkNGena_Ng2CphWNwsRGSMxzDsTjU2A@mail.gmail.com
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20230602010137.784664-1-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
With commit 858e8b792d ("tpm, tpm_tis: Avoid cache incoherency in test
for interrupts") bit accessor functions are used to access flags in
tpm_tis_data->flags.
However these functions expect bit numbers, while the flags are defined
as bit masks in enum tpm_tis_flag.
Fix this inconsistency by using numbers instead of masks also for the
flags in the enum.
Reported-by: Pavel Machek <pavel@denx.de>
Fixes: 858e8b792d ("tpm, tpm_tis: Avoid cache incoherency in test for interrupts")
Signed-off-by: Lino Sanfilippo <l.sanfilippo@kunbus.com>
Cc: stable@vger.kernel.org
Reviewed-by: Pavel Machek <pavel@denx.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 fix from Ted Ts'o:
"Fix an ext4 regression which landed during the 6.4 merge window"
* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
Revert "ext4: remove ac->ac_found > sbi->s_mb_min_to_scan dead check in ext4_mb_check_limits"
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Merge tag 'for-6.4-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fix from David Sterba:
"One regression fix.
The rewrite of scrub code in 6.4 broke device replace in zoned mode,
some of the writes could happen out of order so this had to be
adjusted for all cases"
* tag 'for-6.4-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: zoned: fix dev-replace after the scrub rework
This reverts commit 32c0869370.
The reverted commit was intended to remove a dead check however it was observed
that this check was actually being used to exit early instead of looping
sbi->s_mb_max_to_scan times when we are able to find a free extent bigger than
the goal extent. Due to this, a my performance tests (fsmark, parallel file
writes in a highly fragmented FS) were seeing a 2x-3x regression.
Example, the default value of the following variables is:
sbi->s_mb_max_to_scan = 200
sbi->s_mb_min_to_scan = 10
In ext4_mb_check_limits() if we find an extent smaller than goal, then we return
early and try again. This loop will go on until we have processed
sbi->s_mb_max_to_scan(=200) number of free extents at which point we exit and
just use whatever we have even if it is smaller than goal extent.
Now, the regression comes when we find an extent bigger than goal. Earlier, in
this case we would loop only sbi->s_mb_min_to_scan(=10) times and then just use
the bigger extent. However with commit 32c08693 that check was removed and hence
we would loop sbi->s_mb_max_to_scan(=200) times even though we have a big enough
free extent to satisfy the request. The only time we would exit early would be
when the free extent is *exactly* the size of our goal, which is pretty uncommon
occurrence and so we would almost always end up looping 200 times.
Hence, revert the commit by adding the check back to fix the regression. Also
add a comment to outline this policy.
Fixes: 32c0869370 ("ext4: remove ac->ac_found > sbi->s_mb_min_to_scan dead check in ext4_mb_check_limits")
Signed-off-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Reviewed-by: Kemeng Shi <shikemeng@huaweicloud.com>
Link: https://lore.kernel.org/r/ddcae9658e46880dfec2fb0aa61d01fb3353d202.1685449706.git.ojaswin@linux.ibm.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
When the uvcvideo driver encounters a format descriptor with an unknown
format GUID, it creates a corresponding struct uvc_format instance with
the fcc field set to 0. Since commit 50459f103e ("media: uvcvideo:
Remove format descriptions"), the driver relies on the V4L2 core to
provide the format description string, which the V4L2 core can't do
without a valid 4CC. This triggers a WARN_ON.
As a format with a zero 4CC can't be selected, it is unusable for
applications. Ignore the format completely without creating a uvc_format
instance, which fixes the warning.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=217252
Link: https://bugzilla.redhat.com/show_bug.cgi?id=2180107
Fixes: 50459f103e ("media: uvcvideo: Remove format descriptions")
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
* A build warning fix for BUILTIN_DTB=y.
* Hibernation support is hidden behind NONPORTABLE, as it depends on
some undocumented early boot behavior and breaks on most platforms.
* A fix for relocatable kernels on systems with early boot errata.
* A fix to properly handle perf callchains for kernel tracepoints.
* A pair of fixes for NAPOT to avoid inconsistencies between PTEs and
handle hardware that sets arbitrary A/D bits.
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Merge tag 'riscv-for-linus-6.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fixes from Palmer Dabbelt:
- A build warning fix for BUILTIN_DTB=y
- Hibernation support is hidden behind NONPORTABLE, as it depends on
some undocumented early boot behavior and breaks on most platforms
- A fix for relocatable kernels on systems with early boot errata
- A fix to properly handle perf callchains for kernel tracepoints
- A pair of fixes for NAPOT to avoid inconsistencies between PTEs and
handle hardware that sets arbitrary A/D bits
* tag 'riscv-for-linus-6.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
riscv: Implement missing huge_ptep_get
riscv: Fix huge_ptep_set_wrprotect when PTE is a NAPOT
riscv: perf: Fix callchain parse error with kernel tracepoint events
riscv: Fix relocatable kernels with early alternatives using -fno-pie
RISC-V: mark hibernation as nonportable
riscv: Fix unused variable warning when BUILTIN_DTB is set
Add missing kernel doc for the new 'client_caps' field in struct
v4l2_subdev_fh.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Fixes: f57fa29592 ("media: v4l2-subdev: Add new ioctl for client capabilities")
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Initialize hs_settle to 0 to avoid this compiler warning:
imx8mq-mipi-csi2.c: In function 'imx8mq_mipi_csi_start_stream.part.0':
imx8mq-mipi-csi2.c:91:55: warning: 'hs_settle' may be used uninitialized [-Wmaybe-uninitialized]
91 | #define GPR_CSI2_1_S_PRG_RXHS_SETTLE(x) (((x) & 0x3f) << 2)
| ^~
imx8mq-mipi-csi2.c:357:13: note: 'hs_settle' was declared here
357 | u32 hs_settle;
| ^~~~~~~~~
It's a false positive, but it is too complicated for the compiler to detect that.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Martin Kepplinger <martink@posteo.de>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
While updating v4l2_create_fwnode_links_to_pad() to accept non-subdev
sinks, the check is_media_entity_v4l2_subdev() was not removed which
prevented the function from being used with non-subdev sinks, Drop the
unnecessary check.
Fixes: bd5a03bc5b ("media: Accept non-subdev sinks in v4l2_create_fwnode_links_to_pad()")
Signed-off-by: Vaishnav Achath <vaishnav.a@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
- Two minor bug fixes
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Merge tag 'nfsd-6.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux
Pull nfsd fixes from Chuck Lever:
- Two minor bug fixes
* tag 'nfsd-6.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
nfsd: fix double fget() bug in __write_ports_addfd()
nfsd: make a copy of struct iattr before calling notify_change
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Merge tag 'block-6.4-2023-06-02' of git://git.kernel.dk/linux
Pull block fixes from Jens Axboe:
"Just an NVMe pull request with (mostly) KATO fixes, a regression fix
for zoned device revalidation, and a fix for an md raid5 regression"
* tag 'block-6.4-2023-06-02' of git://git.kernel.dk/linux:
nvme: fix the name of Zone Append for verbose logging
nvme: improve handling of long keep alives
nvme: check IO start time when deciding to defer KA
nvme: double KA polling frequency to avoid KATO with TBKAS on
nvme: fix miss command type check
block: fix revalidate performance regression
md/raid5: fix miscalculation of 'end_sector' in raid5_read_one_chunk()
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Merge tag 'io_uring-6.4-2023-06-02' of git://git.kernel.dk/linux
Pull io_uring fix from Jens Axboe:
"Just a single revert in here, removing the warning on the epoll ctl
opcode.
We originally deprecated this a few releases ago, but I've since had
two people report that it's being used. Which isn't the biggest deal,
obviously this is why we out in the deprecation notice in the first
place, but it also means that we should just kill this warning again
and abandon the deprecation plans.
Since it's only a few handfuls of code to support epoll ctl, not worth
going any further with this imho"
* tag 'io_uring-6.4-2023-06-02' of git://git.kernel.dk/linux:
io_uring: undeprecate epoll_ctl support
amdgpu:
- Fix mclk and fclk output ordering on some APUs
- Fix display regression with 5K VRR
- VCN, JPEG spurious interrupt warning fixes
- Fix SI DPM on some ARM64 platforms
- Fix missing TMZ enablement on GC 11.0.1
i915:
- Fix for OA reporting to allow detecting non-power-of-two reports
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Merge tag 'drm-fixes-2023-06-02' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Dave Airlie:
"Quiet enough week, though the misc fixes tree didn't get to me when I
was sending this, so maybe it'll be a bit bigger next week, just one
i915 fix and some scattered amdgpu fixes:
amdgpu:
- Fix mclk and fclk output ordering on some APUs
- Fix display regression with 5K VRR
- VCN, JPEG spurious interrupt warning fixes
- Fix SI DPM on some ARM64 platforms
- Fix missing TMZ enablement on GC 11.0.1
i915:
- Fix for OA reporting to allow detecting non-power-of-two reports"
* tag 'drm-fixes-2023-06-02' of git://anongit.freedesktop.org/drm/drm:
drm/i915/perf: Clear out entire reports after reading if not power of 2 size
drm/amdgpu: enable tmz by default for GC 11.0.1
drm/amd/pm: resolve reboot exception for si oland
drm/amdgpu: add RAS POISON interrupt funcs for jpeg_v4_0
drm/amdgpu: add RAS POISON interrupt funcs for jpeg_v2_6
drm/amdgpu: separate ras irq from jpeg instance irq for UVD_POISON
drm/amdgpu: add RAS POISON interrupt funcs for vcn_v4_0
drm/amdgpu: add RAS POISON interrupt funcs for vcn_v2_6
drm/amdgpu: separate ras irq from vcn instance irq for UVD_POISON
Revert "drm/amd/display: Do not set drr on pipe commit"
Revert "drm/amd/display: Block optimize on consecutive FAMS enables"
drm/amd/pm: reverse mclk and fclk clocks levels for renoir
drm/amd/pm: reverse mclk and fclk clocks levels for vangogh
drm/amd/pm: reverse mclk and fclk clocks levels for yellow carp
drm/amd/pm: reverse mclk clocks levels for SMU v13.0.5
drm/amd/pm: reverse mclk and fclk clocks levels for SMU v13.0.4
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Merge tag 'selinux-pr-20230601' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux
Pull selinux fix from Paul Moore:
"A small SELinux Makefile fix to resolve a problem seen when building
the kernel with older versions of make.
The fix is pretty trivial and effectively reverts a patch that was
merged during the last merge window"
* tag 'selinux-pr-20230601' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
selinux: don't use make's grouped targets feature yet
huge_ptep_get must be reimplemented in order to go through all the PTEs
of a NAPOT region: this is needed because the HW can update the A/D bits
of any of the PTE that constitutes the NAPOT region.
Fixes: 82a1a1f3bf ("riscv: mm: support Svnapot in hugetlb page")
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Link: https://lore.kernel.org/r/20230428120120.21620-2-alexghiti@rivosinc.com
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
We need to avoid inconsistencies across the PTEs that form a NAPOT
region, so when we write protect such a region, we should clear and flush
all the PTEs to make sure that any of those PTEs is not cached which would
result in such inconsistencies (arm64 does the same).
Fixes: 82a1a1f3bf ("riscv: mm: support Svnapot in hugetlb page")
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Link: https://lore.kernel.org/r/20230428120120.21620-1-alexghiti@rivosinc.com
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
A zstd fix by lucas as he tested zstd decompression support
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Merge tag 'modules-6.4-rc5-second-pull' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux
Pull modules fix from Luis Chamberlain:
"A zstd fix by lucas as he tested zstd decompression support"
* tag 'modules-6.4-rc5-second-pull' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux:
module/decompress: Fix error checking on zstd decompression
- fix harmless warning in zboot code on 'make clean'
- add some missing prototypes
- fix boot regressions triggered by PE/COFF header image minor version
bump
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Merge tag 'efi-fixes-for-v6.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi
Pull EFI fixes from Ard Biesheuvel:
"A few minor fixes for EFI, one of which fixes the reported boot
regression when booting x86 kernels using the BIOS based loader built
into the hypervisor framework on macOS.
- fix harmless warning in zboot code on 'make clean'
- add some missing prototypes
- fix boot regressions triggered by PE/COFF header image minor
version bump"
* tag 'efi-fixes-for-v6.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi:
efi: Bump stub image version for macOS HVF compatibility
efi: fix missing prototype warnings
efi/libstub: zboot: Avoid eager evaluation of objcopy flags
- Fix null-ptr-deref in soft_cursor
- various remove callback conversions
- error path fixes in imsttfb
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Merge tag 'fbdev-for-6.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev
Pull fbdev fixes from Helge Deller:
"Most notable is a fix for a null-ptr-deref in fbcon's soft_cursor
function which was found by syzbot.
- Fix null-ptr-deref in soft_cursor
- various remove callback conversions
- error path fixes in imsttfb"
* tag 'fbdev-for-6.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev:
fbdev: bw2: Convert to platform remove callback returning void
fbdev: broadsheetfb: Convert to platform remove callback returning void
fbdev: au1200fb: Convert to platform remove callback returning void
fbdev: au1100fb: Convert to platform remove callback returning void
fbdev: arcfb: Convert to platform remove callback returning void
fbdev: au1100fb: Drop if with an always false condition
fbcon: Fix null-ptr-deref in soft_cursor
fbdev: imsttfb: Fix error path of imsttfb_probe()
fbdev: imsttfb: Release framebuffer and dealloc cmap on error path
fbdev: matroxfb ssd1307fb: Switch i2c drivers back to use .probe()
While implementing support for in-kernel decompression in kmod,
finit_module() was returning a very suspicious value:
finit_module(3, "", MODULE_INIT_COMPRESSED_FILE) = 18446744072717407296
It turns out the check for module_get_next_page() failing is wrong,
and hence the decompression was not really taking place. Invert
the condition to fix it.
Fixes: 169a58ad82 ("module/decompress: Support zstd in-kernel decompression")
Cc: stable@kernel.org
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
* MAINTAINERS: Add Michal as reviewer instead of Naga
* mtdchar: Mark bits of ioctl handler noinline
NAND controller drivers:
* marvell:
- Don't set the NAND frequency select
- Ensure timing values are written
* ingenic: Fix empty stub helper definitions
SPI-NOR core:
* Fix divide by zero for spi-nor-generic flashes
SPI-NOR manufacturer driver:
* spansion: make sure local struct does not contain garbage
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Merge tag 'mtd/fixes-for-6.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux
Pull mtd fixes from Miquel Raynal:
"MTD core:
- MAINTAINERS: Add Michal as reviewer instead of Naga
- mtdchar: Mark bits of ioctl handler noinline
NAND controller drivers:
- marvell:
- Don't set the NAND frequency select
- Ensure timing values are written
- ingenic: Fix empty stub helper definitions
SPI-NOR core:
- Fix divide by zero for spi-nor-generic flashes
SPI-NOR manufacturer driver:
- spansion: make sure local struct does not contain garbage"
* tag 'mtd/fixes-for-6.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux:
mtd: rawnand: marvell: don't set the NAND frequency select
mtd: rawnand: marvell: ensure timing values are written
mtdchar: mark bits of ioctl handler noinline
MAINTAINERS: Add myself as reviewer instead of Naga
mtd: spi-nor: Fix divide by zero for spi-nor-generic flashes
mtd: rawnand: ingenic: fix empty stub helper definitions
mtd: spi-nor: spansion: make sure local struct does not contain garbage
sub-tree submissions this week. The mlx5 IRQ fixes are notable,
people were complaining about that. No fires burning.
Current release - regressions:
- eth: mlx5e:
- multiple fixes for dynamic IRQ allocation
- prevent encap offload when neigh update is running
- eth: mana: fix perf regression: remove rx_cqes, tx_cqes counters
Current release - new code bugs:
- eth: mlx5e: DR, add missing mutex init/destroy in pattern manager
Previous releases - always broken:
- tcp: deny tcp_disconnect() when threads are waiting
- sched: prevent ingress Qdiscs from getting installed in random
locations in the hierarchy and moving around
- sched: flower: fix possible OOB write in fl_set_geneve_opt()
- netlink: fix NETLINK_LIST_MEMBERSHIPS length report
- udp6: fix race condition in udp6_sendmsg & connect
- tcp: fix mishandling when the sack compression is deferred
- rtnetlink: validate link attributes set at creation time
- mptcp: fix connect timeout handling
- eth: stmmac: fix call trace when stmmac_xdp_xmit() is invoked
- eth: amd-xgbe: fix the false linkup in xgbe_phy_status
- eth: mlx5e:
- fix corner cases in internal buffer configuration
- drain health before unregistering devlink
- usb: qmi_wwan: set DTR quirk for BroadMobi BM818
Misc:
- tcp: return user_mss for TCP_MAXSEG in CLOSE/LISTEN state if user_mss set
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'net-6.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"Happy Wear a Dress Day.
Fairly standard-sized batch of fixes, accounting for the lack of
sub-tree submissions this week. The mlx5 IRQ fixes are notable, people
were complaining about that. No fires burning.
Current release - regressions:
- eth: mlx5e:
- multiple fixes for dynamic IRQ allocation
- prevent encap offload when neigh update is running
- eth: mana: fix perf regression: remove rx_cqes, tx_cqes counters
Current release - new code bugs:
- eth: mlx5e: DR, add missing mutex init/destroy in pattern manager
Previous releases - always broken:
- tcp: deny tcp_disconnect() when threads are waiting
- sched: prevent ingress Qdiscs from getting installed in random
locations in the hierarchy and moving around
- sched: flower: fix possible OOB write in fl_set_geneve_opt()
- netlink: fix NETLINK_LIST_MEMBERSHIPS length report
- udp6: fix race condition in udp6_sendmsg & connect
- tcp: fix mishandling when the sack compression is deferred
- rtnetlink: validate link attributes set at creation time
- mptcp: fix connect timeout handling
- eth: stmmac: fix call trace when stmmac_xdp_xmit() is invoked
- eth: amd-xgbe: fix the false linkup in xgbe_phy_status
- eth: mlx5e:
- fix corner cases in internal buffer configuration
- drain health before unregistering devlink
- usb: qmi_wwan: set DTR quirk for BroadMobi BM818
Misc:
- tcp: return user_mss for TCP_MAXSEG in CLOSE/LISTEN state if
user_mss set"
* tag 'net-6.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (71 commits)
mptcp: fix active subflow finalization
mptcp: add annotations around sk->sk_shutdown accesses
mptcp: fix data race around msk->first access
mptcp: consolidate passive msk socket initialization
mptcp: add annotations around msk->subflow accesses
mptcp: fix connect timeout handling
rtnetlink: add the missing IFLA_GRO_ tb check in validate_linkmsg
rtnetlink: move IFLA_GSO_ tb check to validate_linkmsg
rtnetlink: call validate_linkmsg in rtnl_create_link
ice: recycle/free all of the fragments from multi-buffer frame
net: phy: mxl-gpy: extend interrupt fix to all impacted variants
net: renesas: rswitch: Fix return value in error path of xmit
net: dsa: mv88e6xxx: Increase wait after reset deactivation
net: ipa: Use correct value for IPA_STATUS_SIZE
tcp: fix mishandling when the sack compression is deferred.
net/sched: flower: fix possible OOB write in fl_set_geneve_opt()
sfc: fix error unwinds in TC offload
net/mlx5: Read embedded cpu after init bit cleared
net/mlx5e: Fix error handling in mlx5e_refresh_tirs
net/mlx5: Ensure af_desc.mask is properly initialized
...
When switching from kthreads to vhost_tasks two bugs were added:
1. The vhost worker tasks's now show up as processes so scripts doing
ps or ps a would not incorrectly detect the vhost task as another
process. 2. kthreads disabled freeze by setting PF_NOFREEZE, but
vhost tasks's didn't disable or add support for them.
To fix both bugs, this switches the vhost task to be thread in the
process that does the VHOST_SET_OWNER ioctl, and has vhost_worker call
get_signal to support SIGKILL/SIGSTOP and freeze signals. Note that
SIGKILL/STOP support is required because CLONE_THREAD requires
CLONE_SIGHAND which requires those 2 signals to be supported.
This is a modified version of the patch written by Mike Christie
<michael.christie@oracle.com> which was a modified version of patch
originally written by Linus.
Much of what depended upon PF_IO_WORKER now depends on PF_USER_WORKER.
Including ignoring signals, setting up the register state, and having
get_signal return instead of calling do_group_exit.
Tidied up the vhost_task abstraction so that the definition of
vhost_task only needs to be visible inside of vhost_task.c. Making
it easier to review the code and tell what needs to be done where.
As part of this the main loop has been moved from vhost_worker into
vhost_task_fn. vhost_worker now returns true if work was done.
The main loop has been updated to call get_signal which handles
SIGSTOP, freezing, and collects the message that tells the thread to
exit as part of process exit. This collection clears
__fatal_signal_pending. This collection is not guaranteed to
clear signal_pending() so clear that explicitly so the schedule()
sleeps.
For now the vhost thread continues to exist and run work until the
last file descriptor is closed and the release function is called as
part of freeing struct file. To avoid hangs in the coredump
rendezvous and when killing threads in a multi-threaded exec. The
coredump code and de_thread have been modified to ignore vhost threads.
Remvoing the special case for exec appears to require teaching
vhost_dev_flush how to directly complete transactions in case
the vhost thread is no longer running.
Removing the special case for coredump rendezvous requires either the
above fix needed for exec or moving the coredump rendezvous into
get_signal.
Fixes: 6e890c5d50 ("vhost: use vhost_tasks for worker threads")
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Co-developed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Mike Christie <michael.christie@oracle.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Masami Hiramatsu (Google)