A couple of small fixes for the the mt6358 driver, fixing error
reporting and a bootstrapping issue.
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Merge tag 'regulator-fix-v6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator
Pull regulator fixes from Mark Brown:
"A couple of small fixes for the the mt6358 driver, fixing error
reporting and a bootstrapping issue"
* tag 'regulator-fix-v6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
regulator: mt6358: Fix incorrect VCN33 sync error message
regulator: mt6358: Sync VCN33_* enable status after checking ID
Here are a set of USB driver fixes for 6.5-rc4. Include in here are:
- new USB serial device ids
- dwc3 driver fixes for reported issues
- typec driver fixes for reported problems
- gadget driver fixes
- reverts of some problematic USB changes that went into -rc1
All of these have been in linux-next with no reported problems.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-6.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are a set of USB driver fixes for 6.5-rc4. Include in here are:
- new USB serial device ids
- dwc3 driver fixes for reported issues
- typec driver fixes for reported problems
- gadget driver fixes
- reverts of some problematic USB changes that went into -rc1
All of these have been in linux-next with no reported problems"
* tag 'usb-6.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (24 commits)
usb: misc: ehset: fix wrong if condition
usb: dwc3: pci: skip BYT GPIO lookup table for hardwired phy
usb: cdns3: fix incorrect calculation of ep_buf_size when more than one config
usb: gadget: call usb_gadget_check_config() to verify UDC capability
usb: typec: Use sysfs_emit_at when concatenating the string
usb: typec: Iterate pds array when showing the pd list
usb: typec: Set port->pd before adding device for typec_port
usb: typec: qcom: fix return value check in qcom_pmic_typec_probe()
Revert "usb: gadget: tegra-xudc: Fix error check in tegra_xudc_powerdomain_init()"
Revert "usb: xhci: tegra: Fix error check"
USB: gadget: Fix the memory leak in raw_gadget driver
usb: gadget: core: remove unbalanced mutex_unlock in usb_gadget_activate
Revert "usb: dwc3: core: Enable AutoRetry feature in the controller"
Revert "xhci: add quirk for host controllers that don't update endpoint DCS"
USB: quirks: add quirk for Focusrite Scarlett
usb: xhci-mtk: set the dma max_seg_size
MAINTAINERS: drop invalid usb/cdns3 Reviewer e-mail
usb: dwc3: don't reset device side if dwc3 was configured as host-only
usb: typec: ucsi: move typec_set_mode(TYPEC_STATE_SAFE) to ucsi_unregister_partner()
usb: ohci-at91: Fix the unhandle interrupt when resume
...
Here are some small TTY and serial driver fixes for 6.5-rc4 for some
reported problems. Included in here is:
- TIOCSTI fix for braille readers
- documentation fix for minor numbers
- MAINTAINERS update for new serial files in -rc1
- minor serial driver fixes for reported problems
All of these have been in linux-next with no reported problems.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-6.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial fixes from Greg KH:
"Here are some small TTY and serial driver fixes for 6.5-rc4 for some
reported problems. Included in here is:
- TIOCSTI fix for braille readers
- documentation fix for minor numbers
- MAINTAINERS update for new serial files in -rc1
- minor serial driver fixes for reported problems
All of these have been in linux-next with no reported problems"
* tag 'tty-6.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
serial: 8250_dw: Preserve original value of DLF register
tty: serial: sh-sci: Fix sleeping in atomic context
serial: sifive: Fix sifive_serial_console_setup() section
Documentation: devices.txt: reconcile serial/ucc_uart minor numers
MAINTAINERS: Update TTY layer for lists and recently added files
tty: n_gsm: fix UAF in gsm_cleanup_mux
TIOCSTI: always enable for CAP_SYS_ADMIN
Here are 3 small staging driver fixes for 6.5-rc4 that resolve some
reported problems. These fixes are:
- fix for an old bug in the r8712 driver
- fbtft driver fix for a spi device
- potential overflow fix in the ks7010 driver
All of these have been in linux-next with no reported problems.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-6.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging driver fixes from Greg KH:
"Here are three small staging driver fixes for 6.5-rc4 that resolve
some reported problems. These fixes are:
- fix for an old bug in the r8712 driver
- fbtft driver fix for a spi device
- potential overflow fix in the ks7010 driver
All of these have been in linux-next with no reported problems"
* tag 'staging-6.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
staging: ks7010: potential buffer overflow in ks_wlan_set_encode_ext()
staging: fbtft: ili9341: use macro FBTFT_REGISTER_SPI_DRIVER
staging: r8712: Fix memory leak in _r8712_init_xmit_priv()
Here is a char driver fix and some documentation updates for 6.5-rc4
that contain the following changes:
- sram/genalloc bugfix for reported problem
- security-bugs.rst update based on recent discussions
- embargoed-hardware-issues minor cleanups and then partial revert for
the project/company lists
All of these have been in linux-next for a while with no reported
problems, and the documentation updates have all been reviewed by the
relevant developers.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-6.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char driver and Documentation fixes from Greg KH:
"Here is a char driver fix and some documentation updates for 6.5-rc4
that contain the following changes:
- sram/genalloc bugfix for reported problem
- security-bugs.rst update based on recent discussions
- embargoed-hardware-issues minor cleanups and then partial revert
for the project/company lists
All of these have been in linux-next for a while with no reported
problems, and the documentation updates have all been reviewed by the
relevant developers"
* tag 'char-misc-6.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
misc/genalloc: Name subpools by of_node_full_name()
Documentation: embargoed-hardware-issues.rst: add AMD to the list
Documentation: embargoed-hardware-issues.rst: clean out empty and unused entries
Documentation: security-bugs.rst: clarify CVE handling
Documentation: security-bugs.rst: update preferences when dealing with the linux-distros group
- probe-events: Fix to add NULL check for some BTF API calls which can
return error code and NULL.
- ftrace selftests: Fix to check fprobe and kprobe event correctly. This
fixes a miss condition of the test command.
- kprobes: Prohibit probing on the function which starts from "__cfi_"
and "__pfx_" since those are auto generated for kernel CFI and not
executed.
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Merge tag 'probes-fixes-v6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull probe fixes from Masami Hiramatsu:
- probe-events: add NULL check for some BTF API calls which can return
error code and NULL.
- ftrace selftests: check fprobe and kprobe event correctly. This fixes
a miss condition of the test command.
- kprobes: do not allow probing functions that start with "__cfi_" or
"__pfx_" since those are auto generated for kernel CFI and not
executed.
* tag 'probes-fixes-v6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
kprobes: Prohibit probing on CFI preamble symbol
selftests/ftrace: Fix to check fprobe event eneblement
tracing/probes: Fix to add NULL check for BTF APIs
* Do not register IRQ bypass consumer if posted interrupts not supported
* Fix missed device interrupt due to non-atomic update of IRR
* Use GFP_KERNEL_ACCOUNT for pid_table in ipiv
* Make VMREAD error path play nice with noinstr
* x86: Acquire SRCU read lock when handling fastpath MSR writes
* Support linking rseq tests statically against glibc 2.35+
* Fix reference count for stats file descriptors
* Detect userspace setting invalid CR0
Non-KVM:
* Remove coccinelle script that has caused multiple confusion
("debugfs, coccinelle: check for obsolete DEFINE_SIMPLE_ATTRIBUTE() usage",
acked by Greg)
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm fixes from Paolo Bonzini:
"x86:
- Do not register IRQ bypass consumer if posted interrupts not
supported
- Fix missed device interrupt due to non-atomic update of IRR
- Use GFP_KERNEL_ACCOUNT for pid_table in ipiv
- Make VMREAD error path play nice with noinstr
- x86: Acquire SRCU read lock when handling fastpath MSR writes
- Support linking rseq tests statically against glibc 2.35+
- Fix reference count for stats file descriptors
- Detect userspace setting invalid CR0
Non-KVM:
- Remove coccinelle script that has caused multiple confusion
("debugfs, coccinelle: check for obsolete DEFINE_SIMPLE_ATTRIBUTE()
usage", acked by Greg)"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (21 commits)
KVM: selftests: Expand x86's sregs test to cover illegal CR0 values
KVM: VMX: Don't fudge CR0 and CR4 for restricted L2 guest
KVM: x86: Disallow KVM_SET_SREGS{2} if incoming CR0 is invalid
Revert "debugfs, coccinelle: check for obsolete DEFINE_SIMPLE_ATTRIBUTE() usage"
KVM: selftests: Verify stats fd is usable after VM fd has been closed
KVM: selftests: Verify stats fd can be dup()'d and read
KVM: selftests: Verify userspace can create "redundant" binary stats files
KVM: selftests: Explicitly free vcpus array in binary stats test
KVM: selftests: Clean up stats fd in common stats_test() helper
KVM: selftests: Use pread() to read binary stats header
KVM: Grab a reference to KVM for VM and vCPU stats file descriptors
selftests/rseq: Play nice with binaries statically linked against glibc 2.35+
Revert "KVM: SVM: Skip WRMSR fastpath on VM-Exit if next RIP isn't valid"
KVM: x86: Acquire SRCU read lock when handling fastpath MSR writes
KVM: VMX: Use vmread_error() to report VM-Fail in "goto" path
KVM: VMX: Make VMREAD error path play nice with noinstr
KVM: x86/irq: Conditionally register IRQ bypass consumer again
KVM: X86: Use GFP_KERNEL_ACCOUNT for pid_table in ipiv
KVM: x86: check the kvm_cpu_get_interrupt result before using it
KVM: x86: VMX: set irr_pending in kvm_apic_update_irr
...
between the lock waiters and the PI chain tree (->pi_waiters) of
a task by giving each tree their own sort key
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Merge tag 'locking_urgent_for_v6.5_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking fix from Borislav Petkov:
- Fix a rtmutex race condition resulting from sharing of the sort key
between the lock waiters and the PI chain tree (->pi_waiters) of a
task by giving each tree their own sort key
* tag 'locking_urgent_for_v6.5_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
locking/rtmutex: Fix task->pi_waiters integrity
injection protection (STIBP) for user processes. Enable STIBP on such
systems.
- Do not delete (but put the ref instead) of AMD MCE error thresholding
sysfs kobjects when destroying them in order not to delete the kernfs
pointer prematurely
- Restore annotation in ret_from_fork_asm() in order to fix kthread
stack unwinding from being marked as unreliable and thus breaking
livepatching
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Merge tag 'x86_urgent_for_v6.5_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Borislav Petkov:
- AMD's automatic IBRS doesn't enable cross-thread branch target
injection protection (STIBP) for user processes. Enable STIBP on such
systems.
- Do not delete (but put the ref instead) of AMD MCE error thresholding
sysfs kobjects when destroying them in order not to delete the kernfs
pointer prematurely
- Restore annotation in ret_from_fork_asm() in order to fix kthread
stack unwinding from being marked as unreliable and thus breaking
livepatching
* tag 'x86_urgent_for_v6.5_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/cpu: Enable STIBP on AMD if Automatic IBRS is enabled
x86/MCE/AMD: Decrement threshold_bank refcount when removing threshold blocks
x86: Fix kthread unwind
handling a wake-up interrupt, a change of affinity, and another
CPU going to sleep can result in a lack of wake-up event on the
next interrupt.
- Fix the locking required on a VPE for GICv4
- Enable Rockchip 3588001 erratum workaround for RK3588S
- Fix the irq-bcm6345-l1 assumtions of the boot CPU always be
the first CPU in the system
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Merge tag 'irq_urgent_for_v6.5_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fixes from Borislav Petkov:
- Work around an erratum on GIC700, where a race between a CPU handling
a wake-up interrupt, a change of affinity, and another CPU going to
sleep can result in a lack of wake-up event on the next interrupt
- Fix the locking required on a VPE for GICv4
- Enable Rockchip 3588001 erratum workaround for RK3588S
- Fix the irq-bcm6345-l1 assumtions of the boot CPU always be the first
CPU in the system
* tag 'irq_urgent_for_v6.5_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/gic-v3: Workaround for GIC-700 erratum 2941627
irqchip/gic-v3: Enable Rockchip 3588001 erratum workaround for RK3588S
irqchip/gic-v4.1: Properly lock VPEs when doing a directLPI invalidation
irq-bcm6345-l1: Do not assume a fixed block to cpu mapping
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Merge tag '6.5-rc3-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6
Pull smb client fixes from Steve French:
"Four small SMB3 client fixes:
- two reconnect fixes (to address the case where non-default
iocharset gets incorrectly overridden at reconnect with the
default charset)
- fix for NTLMSSP_AUTH request setting a flag incorrectly)
- Add missing check for invalid tlink (tree connection) in ioctl"
* tag '6.5-rc3-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
cifs: add missing return value check for cifs_sb_tlink
smb3: do not set NTLMSSP_VERSION flag for negotiate not auth request
cifs: fix charset issue in reconnection
fs/nls: make load_nls() take a const parameter
- Fix to /sys/kernel/tracing/per_cpu/cpu*/stats read and entries.
If a resize shrinks the buffer it clears the read count to notify
readers that they need to reset. But the read count is also used for
accounting and this causes the numbers to be off. Instead, create a
separate variable to use to notify readers to reset.
- Fix the ref counts of the "soft disable" mode. The wrong value was
used for testing if soft disable mode should be enabled or disable,
but instead, just change the logic to do the enable and disable
in place when the SOFT_MODE is set or cleared.
- Several kernel-doc fixes
- Removal of unused external declarations
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Merge tag 'trace-v6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull tracing fixes from Steven Rostedt:
- Fix to /sys/kernel/tracing/per_cpu/cpu*/stats read and entries.
If a resize shrinks the buffer it clears the read count to notify
readers that they need to reset. But the read count is also used for
accounting and this causes the numbers to be off. Instead, create a
separate variable to use to notify readers to reset.
- Fix the ref counts of the "soft disable" mode. The wrong value was
used for testing if soft disable mode should be enabled or disable,
but instead, just change the logic to do the enable and disable in
place when the SOFT_MODE is set or cleared.
- Several kernel-doc fixes
- Removal of unused external declarations
* tag 'trace-v6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
tracing: Fix warning in trace_buffered_event_disable()
ftrace: Remove unused extern declarations
tracing: Fix kernel-doc warnings in trace_seq.c
tracing: Fix kernel-doc warnings in trace_events_trigger.c
tracing/synthetic: Fix kernel-doc warnings in trace_events_synth.c
ring-buffer: Fix kernel-doc warnings in ring_buffer.c
ring-buffer: Fix wrong stat of cpu_buffer->read
Commit a2225d931f ("autofs: remove left-over autofs4 stubs")
promised the removal of the fs/autofs/Kconfig fragment for AUTOFS4_FS
within a couple of releases, but five years later this still has not
happened yet, and AUTOFS4_FS is still enabled in 63 defconfigs.
Get rid of it mechanically:
git grep -l CONFIG_AUTOFS4_FS -- '*defconfig' |
xargs sed -i 's/AUTOFS4_FS/AUTOFS_FS/'
Also just remove the AUTOFS4_FS config option stub. Anybody who hasn't
regenerated their config file in the last five years will need to just
get the new name right when they do.
Signed-off-by: Sven Joachim <svenjoac@gmx.de>
Acked-by: Ian Kent <raven@themaw.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Add coverage to x86's set_sregs_test to verify KVM rejects vendor-agnostic
illegal CR0 values, i.e. CR0 values whose legality doesn't depend on the
current VMX mode. KVM historically has neglected to reject bad CR0s from
userspace, i.e. would happily accept a completely bogus CR0 via
KVM_SET_SREGS{2}.
Punt VMX specific subtests to future work, as they would require quite a
bit more effort, and KVM gets coverage for CR0 checks in general through
other means, e.g. KVM-Unit-Tests.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20230613203037.1968489-4-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Stuff CR0 and/or CR4 to be compliant with a restricted guest if and only
if KVM itself is not configured to utilize unrestricted guests, i.e. don't
stuff CR0/CR4 for a restricted L2 that is running as the guest of an
unrestricted L1. Any attempt to VM-Enter a restricted guest with invalid
CR0/CR4 values should fail, i.e. in a nested scenario, KVM (as L0) should
never observe a restricted L2 with incompatible CR0/CR4, since nested
VM-Enter from L1 should have failed.
And if KVM does observe an active, restricted L2 with incompatible state,
e.g. due to a KVM bug, fudging CR0/CR4 instead of letting VM-Enter fail
does more harm than good, as KVM will often neglect to undo the side
effects, e.g. won't clear rmode.vm86_active on nested VM-Exit, and thus
the damage can easily spill over to L1. On the other hand, letting
VM-Enter fail due to bad guest state is more likely to contain the damage
to L2 as KVM relies on hardware to perform most guest state consistency
checks, i.e. KVM needs to be able to reflect a failed nested VM-Enter into
L1 irrespective of (un)restricted guest behavior.
Cc: Jim Mattson <jmattson@google.com>
Cc: stable@vger.kernel.org
Fixes: bddd82d19e ("KVM: nVMX: KVM needs to unset "unrestricted guest" VM-execution control in vmcs02 if vmcs12 doesn't set it")
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20230613203037.1968489-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reject KVM_SET_SREGS{2} with -EINVAL if the incoming CR0 is invalid,
e.g. due to setting bits 63:32, illegal combinations, or to a value that
isn't allowed in VMX (non-)root mode. The VMX checks in particular are
"fun" as failure to disallow Real Mode for an L2 that is configured with
unrestricted guest disabled, when KVM itself has unrestricted guest
enabled, will result in KVM forcing VM86 mode to virtual Real Mode for
L2, but then fail to unwind the related metadata when synthesizing a
nested VM-Exit back to L1 (which has unrestricted guest enabled).
Opportunistically fix a benign typo in the prototype for is_valid_cr4().
Cc: stable@vger.kernel.org
Reported-by: syzbot+5feef0b9ee9c8e9e5689@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/all/000000000000f316b705fdf6e2b4@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20230613203037.1968489-2-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Verify that VM and vCPU binary stats files are usable even after userspace
has put its last direct reference to the VM. This is a regression test
for a UAF bug where KVM didn't gift the stats files a reference to the VM.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20230711230131.648752-8-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Expand the binary stats test to verify that a stats fd can be dup()'d
and read, to (very) roughly simulate userspace passing around the file.
Adding the dup() test is primarily an intermediate step towards verifying
that userspace can read VM/vCPU stats before _and_ after userspace closes
its copy of the VM fd; the dup() test itself is only mildly interesting.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20230711230131.648752-7-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Verify that KVM doesn't artificially limit KVM_GET_STATS_FD to a single
file per VM/vCPU. There's no known use case for getting multiple stats
fds, but it should work, and more importantly creating multiple files will
make it easier to test that KVM correct manages VM refcounts for stats
files.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20230711230131.648752-6-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Explicitly free the all-encompassing vcpus array in the binary stats test
so that the test is consistent with respect to freeing all dynamically
allocated resources (versus letting them be freed on exit).
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20230711230131.648752-5-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Move the stats fd cleanup code into stats_test() and drop the
superfluous vm_stats_test() and vcpu_stats_test() helpers in order to
decouple creation of the stats file from consuming/testing the file
(deduping code is a bonus). This will make it easier to test various
edge cases related to stats, e.g. that userspace can dup() a stats fd,
that userspace can have multiple stats files for a singleVM/vCPU, etc.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20230711230131.648752-4-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Use pread() with an explicit offset when reading the header and the header
name for a binary stats fd so that the common helper and the binary stats
test don't subtly rely on the file effectively being untouched, e.g. to
allow multiple reads of the header, name, etc.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20230711230131.648752-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Grab a reference to KVM prior to installing VM and vCPU stats file
descriptors to ensure the underlying VM and vCPU objects are not freed
until the last reference to any and all stats fds are dropped.
Note, the stats paths manually invoke fd_install() and so don't need to
grab a reference before creating the file.
Fixes: ce55c04945 ("KVM: stats: Support binary stats retrieval for a VCPU")
Fixes: fcfe1baedd ("KVM: stats: Support binary stats retrieval for a VM")
Reported-by: Zheng Zhang <zheng.zhang@email.ucr.edu>
Closes: https://lore.kernel.org/all/CAC_GQSr3xzZaeZt85k_RCBd5kfiOve8qXo7a81Cq53LuVQ5r=Q@mail.gmail.com
Cc: stable@vger.kernel.org
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Message-Id: <20230711230131.648752-2-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
To allow running rseq and KVM's rseq selftests as statically linked
binaries, initialize the various "trampoline" pointers to point directly
at the expect glibc symbols, and skip the dlysm() lookups if the rseq
size is non-zero, i.e. the binary is statically linked *and* the libc
registered its own rseq.
Define weak versions of the symbols so as not to break linking against
libc versions that don't support rseq in any capacity.
The KVM selftests in particular are often statically linked so that they
can be run on targets with very limited runtime environments, i.e. test
machines.
Fixes: 233e667e1a ("selftests/rseq: Uplift rseq selftests for compatibility with glibc-2.35")
Cc: Aaron Lewis <aaronlewis@google.com>
Cc: kvm@vger.kernel.org
Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20230721223352.2333911-1-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Now that handle_fastpath_set_msr_irqoff() acquires kvm->srcu, i.e. allows
dereferencing memslots during WRMSR emulation, drop the requirement that
"next RIP" is valid. In hindsight, acquiring kvm->srcu would have been a
better fix than avoiding the pastpath, but at the time it was thought that
accessing SRCU-protected data in the fastpath was a one-off edge case.
This reverts commit 5c30e8101e.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20230721224337.2335137-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Temporarily acquire kvm->srcu for read when potentially emulating WRMSR in
the VM-Exit fastpath handler, as several of the common helpers used during
emulation expect the caller to provide SRCU protection. E.g. if the guest
is counting instructions retired, KVM will query the PMU event filter when
stepping over the WRMSR.
dump_stack+0x85/0xdf
lockdep_rcu_suspicious+0x109/0x120
pmc_event_is_allowed+0x165/0x170
kvm_pmu_trigger_event+0xa5/0x190
handle_fastpath_set_msr_irqoff+0xca/0x1e0
svm_vcpu_run+0x5c3/0x7b0 [kvm_amd]
vcpu_enter_guest+0x2108/0x2580
Alternatively, check_pmu_event_filter() could acquire kvm->srcu, but this
isn't the first bug of this nature, e.g. see commit 5c30e8101e ("KVM:
SVM: Skip WRMSR fastpath on VM-Exit if next RIP isn't valid"). Providing
protection for the entirety of WRMSR emulation will allow reverting the
aforementioned commit, and will avoid having to play whack-a-mole when new
uses of SRCU-protected structures are inevitably added in common emulation
helpers.
Fixes: dfdeda67ea ("KVM: x86/pmu: Prevent the PMU from counting disallowed events")
Reported-by: Greg Thelen <gthelen@google.com>
Reported-by: Aaron Lewis <aaronlewis@google.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20230721224337.2335137-2-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Use vmread_error() to report VM-Fail on VMREAD for the "asm goto" case,
now that trampoline case has yet another wrapper around vmread_error() to
play nice with instrumentation.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20230721235637.2345403-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Mark vmread_error_trampoline() as noinstr, and add a second trampoline
for the CONFIG_CC_HAS_ASM_GOTO_OUTPUT=n case to enable instrumentation
when handling VM-Fail on VMREAD. VMREAD is used in various noinstr
flows, e.g. immediately after VM-Exit, and objtool rightly complains that
the call to the error trampoline leaves a no-instrumentation section
without annotating that it's safe to do so.
vmlinux.o: warning: objtool: vmx_vcpu_enter_exit+0xc9:
call to vmread_error_trampoline() leaves .noinstr.text section
Note, strictly speaking, enabling instrumentation in the VM-Fail path
isn't exactly safe, but if VMREAD fails the kernel/system is likely hosed
anyways, and logging that there is a fatal error is more important than
*maybe* encountering slightly unsafe instrumentation.
Reported-by: Su Hui <suhui@nfschina.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20230721235637.2345403-2-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
As was attempted commit 14717e2031 ("kvm: Conditionally register IRQ
bypass consumer"): "if we don't support a mechanism for bypassing IRQs,
don't register as a consumer. Initially this applied to AMD processors,
but when AVIC support was implemented for assigned devices,
kvm_arch_has_irq_bypass() was always returning true.
We can still skip registering the consumer where enable_apicv
or posted-interrupts capability is unsupported or globally disabled.
This eliminates meaningless dev_info()s when the connect fails
between producer and consumer", such as on Linux hosts where enable_apicv
or posted-interrupts capability is unsupported or globally disabled.
Cc: Alex Williamson <alex.williamson@redhat.com>
Reported-by: Yong He <alexyonghe@tencent.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=217379
Signed-off-by: Like Xu <likexu@tencent.com>
Message-Id: <20230724111236.76570-1-likexu@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The pid_table of ipiv is the persistent memory allocated by
per-vcpu, which should be counted into the memory cgroup.
Signed-off-by: Peng Hao <flyingpeng@tencent.com>
Message-Id: <CAPm50aLxCQ3TQP2Lhc0PX3y00iTRg+mniLBqNDOC=t9CLxMwwA@mail.gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The code was blindly assuming that kvm_cpu_get_interrupt never returns -1
when there is a pending interrupt.
While this should be true, a bug in KVM can still cause this.
If -1 is returned, the code before this patch was converting it to 0xFF,
and 0xFF interrupt was injected to the guest, which results in an issue
which was hard to debug.
Add WARN_ON_ONCE to catch this case and skip the injection
if this happens again.
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20230726135945.260841-4-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
When the APICv is inhibited, the irr_pending optimization is used.
Therefore, when kvm_apic_update_irr sets bits in the IRR,
it must set irr_pending to true as well.
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20230726135945.260841-3-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
If APICv is inhibited, then IPIs from peer vCPUs are done by
atomically setting bits in IRR.
This means, that when __kvm_apic_update_irr copies PIR to IRR,
it has to modify IRR atomically as well.
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20230726135945.260841-2-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Do not allow to probe on "__cfi_" or "__pfx_" started symbol, because those
are used for CFI and not executed. Probing it will break the CFI.
Link: https://lore.kernel.org/all/168904024679.116016.18089228029322008512.stgit@devnote2/
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
- Fix error message output in the pata_arasan_cf driver (Minjie).
- Fix invalid error return in the pata_octeon_cf driver initialization
(Yingliang).
- Fix a compilation warning due to a missing static function
declaration in the pata_ns87415 driver (Arnd).
- Fix the condition evaluating when to fetch sense data for successful
completions, which should be done only when command duration limits
are being used (Niklas).
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Merge tag 'ata-6.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata
Pull ata fixes from Damien Le Moal:
- Fix error message output in the pata_arasan_cf driver (Minjie)
- Fix invalid error return in the pata_octeon_cf driver initialization
(Yingliang)
- Fix a compilation warning due to a missing static function
declaration in the pata_ns87415 driver (Arnd)
- Fix the condition evaluating when to fetch sense data for successful
completions, which should be done only when command duration limits
are being used (Niklas)
* tag 'ata-6.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata:
ata: libata-core: fix when to fetch sense data for successful commands
ata: pata_ns87415: mark ns87560_tf_read static
ata: pata_octeon_cf: fix error return code in octeon_cf_probe()
ata: pata_arasan_cf: Use dev_err_probe() instead dev_err() in data_xfer()
Warning happened in trace_buffered_event_disable() at
WARN_ON_ONCE(!trace_buffered_event_ref)
Call Trace:
? __warn+0xa5/0x1b0
? trace_buffered_event_disable+0x189/0x1b0
__ftrace_event_enable_disable+0x19e/0x3e0
free_probe_data+0x3b/0xa0
unregister_ftrace_function_probe_func+0x6b8/0x800
event_enable_func+0x2f0/0x3d0
ftrace_process_regex.isra.0+0x12d/0x1b0
ftrace_filter_write+0xe6/0x140
vfs_write+0x1c9/0x6f0
[...]
The cause of the warning is in __ftrace_event_enable_disable(),
trace_buffered_event_enable() was called once while
trace_buffered_event_disable() was called twice.
Reproduction script show as below, for analysis, see the comments:
```
#!/bin/bash
cd /sys/kernel/tracing/
# 1. Register a 'disable_event' command, then:
# 1) SOFT_DISABLED_BIT was set;
# 2) trace_buffered_event_enable() was called first time;
echo 'cmdline_proc_show:disable_event:initcall:initcall_finish' > \
set_ftrace_filter
# 2. Enable the event registered, then:
# 1) SOFT_DISABLED_BIT was cleared;
# 2) trace_buffered_event_disable() was called first time;
echo 1 > events/initcall/initcall_finish/enable
# 3. Try to call into cmdline_proc_show(), then SOFT_DISABLED_BIT was
# set again!!!
cat /proc/cmdline
# 4. Unregister the 'disable_event' command, then:
# 1) SOFT_DISABLED_BIT was cleared again;
# 2) trace_buffered_event_disable() was called second time!!!
echo '!cmdline_proc_show:disable_event:initcall:initcall_finish' > \
set_ftrace_filter
```
To fix it, IIUC, we can change to call trace_buffered_event_enable() at
fist time soft-mode enabled, and call trace_buffered_event_disable() at
last time soft-mode disabled.
Link: https://lore.kernel.org/linux-trace-kernel/20230726095804.920457-1-zhengyejian1@huawei.com
Cc: <mhiramat@kernel.org>
Fixes: 0fc1b09ff1 ("tracing: Use temp buffer when filtering events")
Signed-off-by: Zheng Yejian <zhengyejian1@huawei.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
or aren't considered serious enough to justify backporting.
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Merge tag 'mm-hotfixes-stable-2023-07-28-15-52' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull hotfixes from Andrew Morton:
"11 hotfixes. Five are cc:stable and the remainder address post-6.4
issues or aren't considered serious enough to justify backporting"
* tag 'mm-hotfixes-stable-2023-07-28-15-52' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
mm/memory-failure: fix hardware poison check in unpoison_memory()
proc/vmcore: fix signedness bug in read_from_oldmem()
mailmap: update remaining active codeaurora.org email addresses
mm: lock VMA in dup_anon_vma() before setting ->anon_vma
mm: fix memory ordering for mm_lock_seq and vm_lock_seq
scripts/spelling.txt: remove 'thead' as a typo
mm/pagewalk: fix EFI_PGT_DUMP of espfix area
shmem: minor fixes to splice-read implementation
tmpfs: fix Documentation of noswap and huge mount options
Revert "um: Use swap() to make code cleaner"
mm/damon/core-test: initialise context before test in damon_test_set_attrs()
Constify thermal_zone_device_register() parameters, which was omitted
by mistake, and fix a double free on thermal zone unregistration in
the generic DT thermal driver (Ahmad Fatoum).
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Merge tag 'thermal-6.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull thermal control fixes from Rafael Wysocki:
"Constify thermal_zone_device_register() parameters, which was omitted
by mistake, and fix a double free on thermal zone unregistration in
the generic DT thermal driver (Ahmad Fatoum)"
* tag 'thermal-6.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
thermal: of: fix double-free on unregistration
thermal: core: constify params in thermal_zone_device_register
Fix the arming of wakeup IRQs in the generic wakeup IRQ code (wakeirq),
drop unused functions from it and fix up a driver using it and trying to
work around the IRQ arming issue in a questionable way (Johan Hovold).
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Merge tag 'pm-6.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"Fix the arming of wakeup IRQs in the generic wakeup IRQ code
(wakeirq), drop unused functions from it and fix up a driver using it
and trying to work around the IRQ arming issue in a questionable way
(Johan Hovold)"
* tag 'pm-6.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
serial: qcom-geni: drop bogus runtime pm state update
PM: sleep: wakeirq: drop unused enable helpers
PM: sleep: wakeirq: fix wake irq arming
Fix kernel-doc warning:
kernel/trace/trace_seq.c:142: warning: Function parameter or member
'args' not described in 'trace_seq_vprintf'
Link: https://lkml.kernel.org/r/20230724140827.1023266-5-cuigaosheng1@huawei.com
Cc: <mhiramat@kernel.org>
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Fix kernel-doc warnings:
kernel/trace/trace_events_trigger.c:59: warning: Function parameter
or member 'buffer' not described in 'event_triggers_call'
kernel/trace/trace_events_trigger.c:59: warning: Function parameter
or member 'event' not described in 'event_triggers_call'
Link: https://lkml.kernel.org/r/20230724140827.1023266-4-cuigaosheng1@huawei.com
Cc: <mhiramat@kernel.org>
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Fix kernel-doc warning:
kernel/trace/trace_events_synth.c:1257: warning: Function parameter
or member 'mod' not described in 'synth_event_gen_cmd_array_start'
Link: https://lkml.kernel.org/r/20230724140827.1023266-3-cuigaosheng1@huawei.com
Cc: <mhiramat@kernel.org>
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Fix kernel-doc warnings:
kernel/trace/ring_buffer.c:954: warning: Function parameter or
member 'cpu' not described in 'ring_buffer_wake_waiters'
kernel/trace/ring_buffer.c:3383: warning: Excess function parameter
'event' description in 'ring_buffer_unlock_commit'
kernel/trace/ring_buffer.c:5359: warning: Excess function parameter
'cpu' description in 'ring_buffer_reset_online_cpus'
Link: https://lkml.kernel.org/r/20230724140827.1023266-2-cuigaosheng1@huawei.com
Cc: <mhiramat@kernel.org>
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Several smaller driver fixes and a core RDMA CM regression fix:
- Fix improperly accepting flags from userspace in mlx4
- Add missing DMA barriers for irdma
- Fix two kcsan warnings in irdma
- Report the correct CQ op code to userspace in irdma
- Report the correct MW bind error code for irdma
- Load the destination address in RDMA CM to resolve a recent regression
- Fix a QP regression in mthca
- Remove a race processing completions in bnxt_re resulting in a crash
- Fix driver unloading races with interrupts and tasklets in bnxt_re
- Fix missing error unwind in rxe
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
Pull rdma fixes from Jason Gunthorpe:
"Several smaller driver fixes and a core RDMA CM regression fix:
- Fix improperly accepting flags from userspace in mlx4
- Add missing DMA barriers for irdma
- Fix two kcsan warnings in irdma
- Report the correct CQ op code to userspace in irdma
- Report the correct MW bind error code for irdma
- Load the destination address in RDMA CM to resolve a recent
regression
- Fix a QP regression in mthca
- Remove a race processing completions in bnxt_re resulting in a
crash
- Fix driver unloading races with interrupts and tasklets in bnxt_re
- Fix missing error unwind in rxe"
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
RDMA/irdma: Report correct WC error
RDMA/irdma: Fix op_type reporting in CQEs
RDMA/rxe: Fix an error handling path in rxe_bind_mw()
RDMA/bnxt_re: Fix hang during driver unload
RDMA/bnxt_re: Prevent handling any completions after qp destroy
RDMA/mthca: Fix crash when polling CQ for shared QPs
RDMA/core: Update CMA destination address on rdma_resolve_addr
RDMA/irdma: Fix data race on CQP request done
RDMA/irdma: Fix data race on CQP completion stats
RDMA/irdma: Add missing read barriers
RDMA/mlx4: Make check for invalid flags stricter
I picked three small scale updates from my 'master' branch, which I think
would improve the quality of the release.
BR, Jarkko
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Merge tag 'tpmdd-v6.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd
Pull tpm fixes from Jarkko Sakkinen:
"I picked up three small scale updates that I think would improve the
quality of the release"
* tag 'tpmdd-v6.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd:
tpm_tis: Explicitly check for error code
tpm: Switch i2c drivers back to use .probe()
security: keys: perform capable check only on privileged operations
When pages are removed in rb_remove_pages(), 'cpu_buffer->read' is set
to 0 in order to make sure any read iterators reset themselves. However,
this will mess 'entries' stating, see following steps:
# cd /sys/kernel/tracing/
# 1. Enlarge ring buffer prepare for later reducing:
# echo 20 > per_cpu/cpu0/buffer_size_kb
# 2. Write a log into ring buffer of cpu0:
# taskset -c 0 echo "hello1" > trace_marker
# 3. Read the log:
# cat per_cpu/cpu0/trace_pipe
<...>-332 [000] ..... 62.406844: tracing_mark_write: hello1
# 4. Stop reading and see the stats, now 0 entries, and 1 event readed:
# cat per_cpu/cpu0/stats
entries: 0
[...]
read events: 1
# 5. Reduce the ring buffer
# echo 7 > per_cpu/cpu0/buffer_size_kb
# 6. Now entries became unexpected 1 because actually no entries!!!
# cat per_cpu/cpu0/stats
entries: 1
[...]
read events: 0
To fix it, introduce 'page_removed' field to count total removed pages
since last reset, then use it to let read iterators reset themselves
instead of changing the 'read' pointer.
Link: https://lore.kernel.org/linux-trace-kernel/20230724054040.3489499-1-zhengyejian1@huawei.com
Cc: <mhiramat@kernel.org>
Cc: <vnagarnaik@google.com>
Fixes: 83f40318da ("ring-buffer: Make removal of ring buffer pages atomic")
Signed-off-by: Zheng Yejian <zhengyejian1@huawei.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
