In `UVERBS_METHOD_CQ_CREATE`, umem should be released if anything goes
wrong. Currently, if `create_cq_umem` fails, umem would not be
released or referenced, causing a possible leak.
In this patch, we release umem at `UVERBS_METHOD_CQ_CREATE`, the driver
should not release umem if it returns an error code.
Fixes: 1a40c362ae ("RDMA/uverbs: Add a common way to create CQ with umem")
Signed-off-by: Shuhao Fu <sfual@cse.ust.hk>
Link: https://patch.msgid.link/aOh1le4YqtYwj-hH@osx.local
Signed-off-by: Leon Romanovsky <leon@kernel.org>
The driver maintains a CQ table that is used to ensure that a CQ is
still valid when processing CQ related AEs. When a CQ is destroyed,
the table entry is cleared, using irdma_cq.cq_num as the index. This
field was never being set, so it was just always clearing out entry
0.
Additionally, the cq_num field size was increased to accommodate HW
supporting more than 64K CQs.
Fixes: b48c24c2d7 ("RDMA/irdma: Implement device supported verb APIs")
Signed-off-by: Jacob Moroni <jmoroni@google.com>
Link: https://patch.msgid.link/20250923142439.943930-1-jmoroni@google.com
Acked-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
In some cases, it is possible for pble_rsrc->next_fpm_addr to be
larger than u32, so remove the u32 cast to avoid unintentional
truncation.
This fixes the following error that can be observed when registering
massive memory regions:
[ 447.227494] (NULL ib_device): cqp opcode = 0x1f maj_err_code = 0xffff min_err_code = 0x800c
[ 447.227505] (NULL ib_device): [Update PE SDs Cmd Error][op_code=21] status=-5 waiting=1 completion_err=1 maj=0xffff min=0x800c
Fixes: e8c4dbc2fc ("RDMA/irdma: Add PBLE resource manager")
Signed-off-by: Jacob Moroni <jmoroni@google.com>
Link: https://patch.msgid.link/20250923190850.1022773-1-jmoroni@google.com
Acked-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
The current error handling path in bnxt_re_destroy_gsi_sqp() could lead
to a resource leak. When bnxt_qplib_destroy_qp() fails, the function
jumps to the 'fail' label and returns immediately, skipping the call
to bnxt_qplib_free_qp_res().
Continue the resource teardown even if bnxt_qplib_destroy_qp() fails,
which aligns with the driver's general error handling strategy and
prevents the potential leak.
Fixes: 8dae419f9e ("RDMA/bnxt_re: Refactor queue pair creation code")
Signed-off-by: YanLong Dai <daiyanlong@kylinos.cn>
Link: https://patch.msgid.link/20250924061444.11288-1-daiyanlong@kylinos.cn
Signed-off-by: Leon Romanovsky <leon@kernel.org>
According to the ABI the units after application of scale and offset are
milli degree celsius for temperature thresholds and milli percent for
relative humidity thresholds. Currently the resulting units are degree
celsius for temperature thresholds and hysteresis and percent for relative
humidity thresholds and hysteresis. Change scale factor to fix this issue.
Fixes: 3ad0e7e5f0 ("iio: humidity: hdc3020: add threshold events support")
Reported-by: Chris Lesiak <chris.lesiak@licorbio.com>
Reviewed-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Signed-off-by: Dimitri Fedrau <dimitri.fedrau@liebherr.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
According to the ABI the units after application of scale and offset are
milli degrees for temperature measurements and milli percent for relative
humidity measurements. Currently the resulting units are degree celsius for
temperature measurements and percent for relative humidity measurements.
Change scale factor to fix this issue.
Fixes: c9180b8e39 ("iio: humidity: Add driver for ti HDC302x humidity sensors")
Reported-by: Chris Lesiak <chris.lesiak@licorbio.com>
Suggested-by: Chris Lesiak <chris.lesiak@licorbio.com>
Reviewed-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Signed-off-by: Dimitri Fedrau <dimitri.fedrau@liebherr.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
The `decimator` and `batch` fields of struct st_lsm6dsx_settings
are arrays indexed by sensor type, not by sensor hardware
identifier; moreover, the `batch` field is only used for the
accelerometer and gyroscope.
Change the array size for `decimator` from ST_LSM6DSX_MAX_ID to
ST_LSM6DSX_ID_MAX, and change the array size for `batch` from
ST_LSM6DSX_MAX_ID to 2; move the enum st_lsm6dsx_sensor_id
definition so that the ST_LSM6DSX_ID_MAX value is usable within
the struct st_lsm6dsx_settings definition.
Fixes: 801a6e0af0 ("iio: imu: st_lsm6dsx: add support to LSM6DSO")
Signed-off-by: Francesco Lavra <flavra@baylibre.com>
Acked-by: Lorenzo Bianconi <lorenzo@kernel.org>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
'rustfmt', by default, formats imports in a way that is prone to
conflicts while merging and rebasing, since in some cases it condenses
several items into the same line.
Document in our guidelines that we will handle this for the moment with
the trailing empty comment workaround and make the tree 'rustfmt'-clean
again.
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Merge tag 'rust-rustfmt' of git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux
Pull rustfmt fixes from Miguel Ojeda:
"Rust 'rustfmt' cleanup
'rustfmt', by default, formats imports in a way that is prone to
conflicts while merging and rebasing, since in some cases it condenses
several items into the same line.
Document in our guidelines that we will handle this for the moment
with the trailing empty comment workaround and make the tree
'rustfmt'-clean again"
* tag 'rust-rustfmt' of git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux:
rust: bitmap: fix formatting
rust: cpufreq: fix formatting
rust: alloc: employ a trailing comment to keep vertical layout
docs: rust: add section on imports formatting
If possible, could you still pick this change for v6.18 [1]? The change in
question corrects the state transitions for ARM FF-A to match the spec and
how tpm_crb behaves on other platforms.
[1] https://lore.kernel.org/linux-integrity/aPN59bwcUrieMACf@kernel.org/
BR, Jarkko
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Merge tag 'tpmdd-next-v6.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd
Pull tpm fix from Jarkko Sakkinen:
"Correct the state transitions for ARM FF-A to match the spec and how
tpm_crb behaves on other platforms"
* tag 'tpmdd-next-v6.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd:
tpm_crb: Add idle support for the Arm FF-A start method
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Merge tag 'pci-v6.18-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci
Pull pci fixes from Bjorn Helgaas:
- Search for MSI Capability with correct ID to fix an MSI regression on
platforms with Cadence IP (Hans Zhang)
- Revert early bridge resource set up to fix resource assignment
failures that broke at least alpha boot and Snapdragon ath12k WiFi
(Ilpo Järvinen)
- Implement VMD .irq_startup()/.irq_shutdown() to fix IRQ issues that
caused boot crashes and broken devices below VMD (Inochi Amaoto)
- Select CONFIG_SCREEN_INFO on X86 to fix black screen on boot when
SCREEN_INFO not selected (Mario Limonciello)
* tag 'pci-v6.18-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci:
PCI/VGA: Select SCREEN_INFO on X86
PCI: vmd: Override irq_startup()/irq_shutdown() in vmd_init_dev_msi_info()
PCI: Revert early bridge resource set up
PCI: cadence: Search for MSI Capability with correct ID
- Avoid missing port component registers setup due to dport enumeration
failure
- Add check for no entries in cxl_feature_info to address accessing
invalid pointer.
- Use %pa printk format to emit resource_size_t in
validate_region_offset()
CXL extended linear cache support fixes:
- Fix setup of memory resource in cxl_acpi_set_cache_size()
- Set range param for region_res_match_cxl_range() as const.
(Addresses a compile warning for match_region_by_range() fix)
- Fix match_region_by_range() to use region_res_match_cxl_range()
- Subtract to find an hpa_alias0 in cxl_poison events to correct
the alias math calculation.
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Merge tag 'cxl-fixes-6.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl
Pull Compute Express Link fixes from Dave Jiang:
"A small collection of CXL fixes. In addition to some misc fixes for
the CXL subsystem, a number of fixes for CXL extended linear cache
support are included to make it functional again.
- Avoid missing port component registers setup due to dport
enumeration failure
- Add check for no entries in cxl_feature_info to address accessing
invalid pointer.
- Use %pa printk format to emit resource_size_t in
validate_region_offset()
CXL extended linear cache support fixes:
- Fix setup of memory resource in cxl_acpi_set_cache_size()
- Set range param for region_res_match_cxl_range() as const
(addresses a compile warning for match_region_by_range() fix)
- Fix match_region_by_range() to use region_res_match_cxl_range()
- Subtract to find an hpa_alias0 in cxl_poison events to correct the
alias math calculation"
* tag 'cxl-fixes-6.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl:
cxl/trace: Subtract to find an hpa_alias0 in cxl_poison events
cxl/region: Use %pa printk format to emit resource_size_t
cxl: Fix match_region_by_range() to use region_res_match_cxl_range()
cxl: Set range param for region_res_match_cxl_range() as const
cxl/acpi: Fix setup of memory resource in cxl_acpi_set_cache_size()
cxl/features: Add check for no entries in cxl_feature_info
cxl/port: Avoid missing port component registers setup
Since the requesttype has USB_DIR_OUT the pipe should be
constructed with usb_sndctrlpipe().
Fixes: 8dc5efe3d1 ("ALSA: usb-audio: Add support for Presonus Studio 1810c")
Signed-off-by: Roy Vegard Ovesen <roy.vegard.ovesen@gmail.com>
Link: https://patch.msgid.link/aPPL3tBFE_oU-JHv@ark
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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Merge tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
Pull bpf fixes from Alexei Starovoitov:
- Replace bpf_map_kmalloc_node() with kmalloc_nolock() to fix kmemleak
imbalance in tracking of bpf_async_cb structures (Alexei Starovoitov)
- Make selftests/bpf arg_parsing.c more robust to errors (Andrii
Nakryiko)
- Fix redefinition of 'off' as different kind of symbol when I40E
driver is builtin (Brahmajit Das)
- Do not disable preemption in bpf_test_run (Sahil Chandna)
- Fix memory leak in __lookup_instance error path (Shardul Bankar)
- Ensure test data is flushed to disk before reading it (Xing Guo)
* tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf:
selftests/bpf: Fix redefinition of 'off' as different kind of symbol
bpf: Do not disable preemption in bpf_test_run().
bpf: Fix memory leak in __lookup_instance error path
selftests: arg_parsing: Ensure data is flushed to disk before reading.
bpf: Replace bpf_map_kmalloc_node() with kmalloc_nolock() to allocate bpf_async_cb structures.
selftests/bpf: make arg_parsing.c more robust to crashes
bpf: test_run: Fix ctx leak in bpf_prog_test_run_xdp error path
Bugfixes:
* Fix for FlexFiles mirror->dss allocation
* Apply delay_retrans to async operations
* Check if suid/sgid is cleared after a write when needed
* Fix setting the state renewal timer for early mounts after a reboot
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Merge tag 'nfs-for-6.18-2' of git://git.linux-nfs.org/projects/anna/linux-nfs
Pull NFS client fixes from Anna Schumaker:
- Fix for FlexFiles mirror->dss allocation
- Apply delay_retrans to async operations
- Check if suid/sgid is cleared after a write when needed
- Fix setting the state renewal timer for early mounts after a reboot
* tag 'nfs-for-6.18-2' of git://git.linux-nfs.org/projects/anna/linux-nfs:
NFS4: Fix state renewals missing after boot
NFS: check if suid/sgid was cleared after a write as needed
NFS4: Apply delay_retrans to async operations
NFSv4/flexfiles: fix to allocate mirror->dss before use
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Merge tag '6.18-rc1-smb-client-fixes' of git://git.samba.org/sfrench/cifs-2.6
Pull smb client fixes from Steve French:
"smb client fixes, security and smbdirect improvements, and some minor cleanup:
- Important OOB DFS fix
- Fix various potential tcon refcount leaks
- smbdirect (RDMA) fixes (following up from test event a few weeks
ago):
- Fixes to improve and simplify handling of memory lifetime of
smbdirect_mr_io structures, when a connection gets disconnected
- Make sure we really wait to reach SMBDIRECT_SOCKET_DISCONNECTED
before destroying resources
- Make sure the send/recv submission/completion queues are large
enough to avoid ib_post_send() from failing under pressure
- convert cifs.ko to use the recommended crypto libraries (instead of
crypto_shash), this also can improve performance
- Three small cleanup patches"
* tag '6.18-rc1-smb-client-fixes' of git://git.samba.org/sfrench/cifs-2.6: (24 commits)
smb: client: Consolidate cmac(aes) shash allocation
smb: client: Remove obsolete crypto_shash allocations
smb: client: Use HMAC-MD5 library for NTLMv2
smb: client: Use MD5 library for SMB1 signature calculation
smb: client: Use MD5 library for M-F symlink hashing
smb: client: Use HMAC-SHA256 library for SMB2 signature calculation
smb: client: Use HMAC-SHA256 library for key generation
smb: client: Use SHA-512 library for SMB3.1.1 preauth hash
cifs: parse_dfs_referrals: prevent oob on malformed input
smb: client: Fix refcount leak for cifs_sb_tlink
smb: client: let smbd_destroy() wait for SMBDIRECT_SOCKET_DISCONNECTED
smb: move some duplicate definitions to common/cifsglob.h
smb: client: let destroy_mr_list() keep smbdirect_mr_io memory if registered
smb: client: let destroy_mr_list() call ib_dereg_mr() before ib_dma_unmap_sg()
smb: client: call ib_dma_unmap_sg if mr->sgt.nents is not 0
smb: client: improve logic in smbd_deregister_mr()
smb: client: improve logic in smbd_register_mr()
smb: client: improve logic in allocate_mr_list()
smb: client: let destroy_mr_list() remove locked from the list
smb: client: let destroy_mr_list() call list_del(&mr->list)
...
- Fix the handling of ZCR_EL2 in NV VMs
- Pick the correct translation regime when doing a PTW on
the back of a SEA
- Prevent userspace from injecting an event into a vcpu that isn't
initialised yet
- Move timer save/restore to the sysreg handling code, fixing EL2 timer
access in the process
- Add FGT-based trapping of MDSCR_EL1 to reduce the overhead of debug
- Fix trapping configuration when the host isn't GICv3
- Improve the detection of HCR_EL2.E2H being RES1
- Drop a spurious 'break' statement in the S1 PTW
- Don't try to access SPE when owned by EL3
Documentation updates:
- Document the failure modes of event injection
- Document that a GICv3 guest can be created on a GICv5 host
with FEAT_GCIE_LEGACY
Selftest improvements:
- Add a selftest for the effective value of HCR_EL2.AMO
- Address build warning in the timer selftest when building with clang
- Teach irqfd selftests about non-x86 architectures
- Add missing sysregs to the set_id_regs selftest
- Fix vcpu allocation in the vgic_lpi_stress selftest
- Correctly enable interrupts in the vgic_lpi_stress selftest
x86:
- Expand the KVM_PRE_FAULT_MEMORY selftest to add a regression test for the
bug fixed by commit 3ccbf6f470 ("KVM: x86/mmu: Return -EAGAIN if userspace
deletes/moves memslot during prefault")
- Don't try to get PMU capabilities from perf when running a CPU with hybrid
CPUs/PMUs, as perf will rightly WARN.
guest_memfd:
- Rework KVM_CAP_GUEST_MEMFD_MMAP (newly introduced in 6.18) into a more
generic KVM_CAP_GUEST_MEMFD_FLAGS
- Add a guest_memfd INIT_SHARED flag and require userspace to explicitly set
said flag to initialize memory as SHARED, irrespective of MMAP. The
behavior merged in 6.18 is that enabling mmap() implicitly initializes
memory as SHARED, which would result in an ABI collision for x86 CoCo VMs
as their memory is currently always initialized PRIVATE.
- Allow mmap() on guest_memfd for x86 CoCo VMs, i.e. on VMs with private
memory, to enable testing such setups, i.e. to hopefully flush out any
other lurking ABI issues before 6.18 is officially released.
- Add testcases to the guest_memfd selftest to cover guest_memfd without MMAP,
and host userspace accesses to mmap()'d private memory.
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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:
- Fix the handling of ZCR_EL2 in NV VMs
- Pick the correct translation regime when doing a PTW on the back of
a SEA
- Prevent userspace from injecting an event into a vcpu that isn't
initialised yet
- Move timer save/restore to the sysreg handling code, fixing EL2
timer access in the process
- Add FGT-based trapping of MDSCR_EL1 to reduce the overhead of debug
- Fix trapping configuration when the host isn't GICv3
- Improve the detection of HCR_EL2.E2H being RES1
- Drop a spurious 'break' statement in the S1 PTW
- Don't try to access SPE when owned by EL3
Documentation updates:
- Document the failure modes of event injection
- Document that a GICv3 guest can be created on a GICv5 host with
FEAT_GCIE_LEGACY
Selftest improvements:
- Add a selftest for the effective value of HCR_EL2.AMO
- Address build warning in the timer selftest when building with
clang
- Teach irqfd selftests about non-x86 architectures
- Add missing sysregs to the set_id_regs selftest
- Fix vcpu allocation in the vgic_lpi_stress selftest
- Correctly enable interrupts in the vgic_lpi_stress selftest
x86:
- Expand the KVM_PRE_FAULT_MEMORY selftest to add a regression test
for the bug fixed by commit 3ccbf6f470 ("KVM: x86/mmu: Return
-EAGAIN if userspace deletes/moves memslot during prefault")
- Don't try to get PMU capabilities from perf when running a CPU with
hybrid CPUs/PMUs, as perf will rightly WARN.
guest_memfd:
- Rework KVM_CAP_GUEST_MEMFD_MMAP (newly introduced in 6.18) into a
more generic KVM_CAP_GUEST_MEMFD_FLAGS
- Add a guest_memfd INIT_SHARED flag and require userspace to
explicitly set said flag to initialize memory as SHARED,
irrespective of MMAP.
The behavior merged in 6.18 is that enabling mmap() implicitly
initializes memory as SHARED, which would result in an ABI
collision for x86 CoCo VMs as their memory is currently always
initialized PRIVATE.
- Allow mmap() on guest_memfd for x86 CoCo VMs, i.e. on VMs with
private memory, to enable testing such setups, i.e. to hopefully
flush out any other lurking ABI issues before 6.18 is officially
released.
- Add testcases to the guest_memfd selftest to cover guest_memfd
without MMAP, and host userspace accesses to mmap()'d private
memory"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (46 commits)
arm64: Revamp HCR_EL2.E2H RES1 detection
KVM: arm64: nv: Use FGT write trap of MDSCR_EL1 when available
KVM: arm64: Compute per-vCPU FGTs at vcpu_load()
KVM: arm64: selftests: Fix misleading comment about virtual timer encoding
KVM: arm64: selftests: Add an E2H=0-specific configuration to get_reg_list
KVM: arm64: selftests: Make dependencies on VHE-specific registers explicit
KVM: arm64: Kill leftovers of ad-hoc timer userspace access
KVM: arm64: Fix WFxT handling of nested virt
KVM: arm64: Move CNT*CT_EL0 userspace accessors to generic infrastructure
KVM: arm64: Move CNT*_CVAL_EL0 userspace accessors to generic infrastructure
KVM: arm64: Move CNT*_CTL_EL0 userspace accessors to generic infrastructure
KVM: arm64: Add timer UAPI workaround to sysreg infrastructure
KVM: arm64: Make timer_set_offset() generally accessible
KVM: arm64: Replace timer context vcpu pointer with timer_id
KVM: arm64: Introduce timer_context_to_vcpu() helper
KVM: arm64: Hide CNTHV_*_EL2 from userspace for nVHE guests
Documentation: KVM: Update GICv3 docs for GICv5 hosts
KVM: arm64: gic-v3: Only set ICH_HCR traps for v2-on-v3 or v3 guests
KVM: arm64: selftests: Actually enable IRQs in vgic_lpi_stress
KVM: arm64: selftests: Allocate vcpus with correct size
...
- Fix to handle NULL pointer dereference at irq domain teardown
- Fix for handling extraction of struct xive_irq_data
- Fix to skip parameter area allocation when fadump disabled
Thanks to: Ganesh Goudar, Hari Bathini, Nam Cao, Ritesh Harjani (IBM) Sourabh Jain, Venkat Rao Bagalkote,
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Merge tag 'powerpc-6.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Madhavan Srinivasan:
- Fix to handle NULL pointer dereference at irq domain teardown
- Fix for handling extraction of struct xive_irq_data
- Fix to skip parameter area allocation when fadump disabled
Thanks to Ganesh Goudar, Hari Bathini, Nam Cao, Ritesh Harjani (IBM),
Sourabh Jain, and Venkat Rao Bagalkote,
* tag 'powerpc-6.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/fadump: skip parameter area allocation when fadump is disabled
powerpc, ocxl: Fix extraction of struct xive_irq_data
powerpc/pseries/msi: Fix NULL pointer dereference at irq domain teardown
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Merge tag 'slab-for-6.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab
Pull slab fixes from Vlastimil Babka:
- Fixes for two bugs that can be triggered when debugging options are
enabled (Hao Ge, Vlastimil Babka)
* tag 'slab-for-6.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab:
slab: reset slab->obj_ext when freeing and it is OBJEXTS_ALLOC_FAIL
slab: fix clearing freelist in free_deferred_objects()
This laptop requires the same quirk as Lenovo Yoga9 14IAP7 for
fixing the bass speaker problems.
Use HDA_CODEC_QUIRK to match on the codec SSID to avoid conflict with
the Lenovo Legion Slim 7 16IRH8, which has the same PCI SSID.
Signed-off-by: J-Donald Tournier <jdtournier@gmail.com>
Link: https://patch.msgid.link/20251018145322.39119-1-jdournier@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Resolve this smatch warning:
arch/riscv/kernel/sys_hwprobe.c:50 hwprobe_arch_id() error: uninitialized symbol 'cpu_id'.
This could happen if hwprobe_arch_id() was called with a key ID of
something other than MVENDORID, MIMPID, and MARCHID. This does not
happen in the current codebase. The only caller of hwprobe_arch_id()
is a function that only passes one of those three key IDs.
For the sake of reducing static analyzer warning noise, and in the
unlikely event that hwprobe_arch_id() is someday called with some
other key ID, validate hwprobe_arch_id()'s input to ensure that
'cpu_id' is always initialized before use.
Fixes: ea3de9ce8a ("RISC-V: Add a syscall for HW probing")
Cc: Evan Green <evan@rivosinc.com>
Signed-off-by: Paul Walmsley <pjw@kernel.org>
Link: https://lore.kernel.org/r/cf5a13ec-19d0-9862-059b-943f36107bf3@kernel.org
In has_thead_homogeneous_vlenb(), smatch detected that the vlenb variable
could be used while uninitialized. It appears that this could happen if
no CPUs described in DT have the "thead,vlenb" property.
Fix by initializing vlenb to 0, which will keep thead_vlenb_of set to 0
(as it was statically initialized). This in turn will cause
riscv_v_setup_vsize() to fall back to CSR probing - the desired result if
thead,vlenb isn't provided in the DT data.
While here, fix a nearby comment typo.
Cc: stable@vger.kernel.org
Cc: Charlie Jenkins <charlie@rivosinc.com>
Fixes: 377be47f90 ("riscv: vector: Use vlenb from DT for thead")
Signed-off-by: Paul Walmsley <pjw@kernel.org>
Link: https://lore.kernel.org/r/22674afb-2fe8-2a83-1818-4c37bd554579@kernel.org
There is an race-condition where device is not full working after SW reset.
Therefore it's necessary to wait some time after reset and verify shadow
registers values by reading and comparing the values before/after reset.
This mechanism is described in datasheet at least from revision D.
Fixes: 12ed27863e ("iio: accel: Add driver support for ADXL355")
Signed-off-by: Valek Andrej <andrej.v@skyrain.eu>
Signed-off-by: Kessler Markus <markus.kessler@hilti.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Fix for EPP value in wrong state after S4
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Merge tag 'amd-pstate-v6.18-2025-10-15' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/superm1/linux
Pull amd-pstate 6.18 content (10/15/25) from Mario Limonciello:
"Fix for EPP value in wrong state after S4"
* tag 'amd-pstate-v6.18-2025-10-15' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/superm1/linux:
cpufreq/amd-pstate: Fix a regression leading to EPP 0 after hibernate
According to the CRB over FF-A specification [1], a TPM that implements
the ABI must comply with the TCG PTP specification. This requires support
for the Idle and Ready states.
This patch implements CRB control area requests for goIdle and
cmdReady on FF-A based TPMs.
The FF-A message used to notify the TPM of CRB updates includes a
locality parameter, which provides a hint to the TPM about which
locality modified the CRB. This patch adds a locality parameter
to __crb_go_idle() and __crb_cmd_ready() to support this.
[1] https://developer.arm.com/documentation/den0138/latest/
Signed-off-by: Stuart Yoder <stuart.yoder@arm.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
- Expand the KVM_PRE_FAULT_MEMORY selftest to add a regression test for the
bug fixed by commit 3ccbf6f470 ("KVM: x86/mmu: Return -EAGAIN if userspace
deletes/moves memslot during prefault")
- Don't try to get PMU capabbilities from perf when running a CPU with hybrid
CPUs/PMUs, as perf will rightly WARN.
- Rework KVM_CAP_GUEST_MEMFD_MMAP (newly introduced in 6.18) into a more
generic KVM_CAP_GUEST_MEMFD_FLAGS
- Add a guest_memfd INIT_SHARED flag and require userspace to explicitly set
said flag to initialize memory as SHARED, irrespective of MMAP. The
behavior merged in 6.18 is that enabling mmap() implicitly initializes
memory as SHARED, which would result in an ABI collision for x86 CoCo VMs
as their memory is currently always initialized PRIVATE.
- Allow mmap() on guest_memfd for x86 CoCo VMs, i.e. on VMs with private
memory, to enable testing such setups, i.e. to hopefully flush out any
other lurking ABI issues before 6.18 is officially released.
- Add testcases to the guest_memfd selftest to cover guest_memfd without MMAP,
and host userspace accesses to mmap()'d private memory.
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Merge tag 'kvm-x86-fixes-6.18-rc2' of https://github.com/kvm-x86/linux into HEAD
KVM x86 fixes for 6.18:
- Expand the KVM_PRE_FAULT_MEMORY selftest to add a regression test for the
bug fixed by commit 3ccbf6f470 ("KVM: x86/mmu: Return -EAGAIN if userspace
deletes/moves memslot during prefault")
- Don't try to get PMU capabbilities from perf when running a CPU with hybrid
CPUs/PMUs, as perf will rightly WARN.
- Rework KVM_CAP_GUEST_MEMFD_MMAP (newly introduced in 6.18) into a more
generic KVM_CAP_GUEST_MEMFD_FLAGS
- Add a guest_memfd INIT_SHARED flag and require userspace to explicitly set
said flag to initialize memory as SHARED, irrespective of MMAP. The
behavior merged in 6.18 is that enabling mmap() implicitly initializes
memory as SHARED, which would result in an ABI collision for x86 CoCo VMs
as their memory is currently always initialized PRIVATE.
- Allow mmap() on guest_memfd for x86 CoCo VMs, i.e. on VMs with private
memory, to enable testing such setups, i.e. to hopefully flush out any
other lurking ABI issues before 6.18 is officially released.
- Add testcases to the guest_memfd selftest to cover guest_memfd without MMAP,
and host userspace accesses to mmap()'d private memory.
The hwprobe vDSO data for some keys, like MISALIGNED_VECTOR_PERF,
is determined by an asynchronous kthread. This can create a race
condition where the kthread finishes after the vDSO data has
already been populated, causing userspace to read stale values.
To fix this race, a new 'ready' flag is added to the vDSO data,
initialized to 'false' during arch_initcall_sync. This flag is
checked by both the vDSO's user-space code and the riscv_hwprobe
syscall. The syscall serves as a one-time gate, using a completion
to wait for any pending probes before populating the data and
setting the flag to 'true', thus ensuring userspace reads fresh
values on its first request.
Reported-by: Tsukasa OI <research_trasio@irq.a4lg.com>
Closes: https://lore.kernel.org/linux-riscv/760d637b-b13b-4518-b6bf-883d55d44e7f@irq.a4lg.com/
Fixes: e7c9d66e31 ("RISC-V: Report vector unaligned access speed hwprobe")
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Alexandre Ghiti <alexghiti@rivosinc.com>
Cc: Olof Johansson <olof@lixom.net>
Cc: stable@vger.kernel.org
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Co-developed-by: Palmer Dabbelt <palmer@dabbelt.com>
Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
Signed-off-by: Jingwei Wang <wangjingwei@iscas.ac.cn>
Link: https://lore.kernel.org/r/20250811142035.105820-1-wangjingwei@iscas.ac.cn
[pjw@kernel.org: fix checkpatch issues]
Signed-off-by: Paul Walmsley <pjw@kernel.org>
Early boot stages may disable CPU DT nodes for unavailable
CPUs based on SKU, pinstraps, eFuse, etc. Currently, the
riscv_early_of_processor_hartid() prints details of a CPU
if it is disabled in DT which has no value and gives a
false impression to the users that there some issue with
the CPU.
Fixes: e3d794d555 ("riscv: treat cpu devicetree nodes without status as enabled")
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20251014163009.182381-1-apatel@ventanamicro.com
Signed-off-by: Paul Walmsley <pjw@kernel.org>
This definition is used by zsmalloc to optimize memory allocation. On
riscv64, it is the same as MAX_PHYSMEM_BITS from asm/sparsemem.h, but
that definition depends on CONFIG_SPARSEMEM. The correct definition is
already provided for riscv32.
Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Link: https://lore.kernel.org/r/20251015233327.3885003-1-samuel.holland@sifive.com
Signed-off-by: Paul Walmsley <pjw@kernel.org>
The pgprot_dmacoherent() is used when allocating memory for
non-coherent devices and by default pgprot_dmacoherent() is
same as pgprot_noncached() unless architecture overrides it.
Currently, there is no pgprot_dmacoherent() definition for
RISC-V hence non-coherent device memory is being mapped as
IO thereby making CPU access to such memory slow.
Define pgprot_dmacoherent() to be same as pgprot_writecombine()
for RISC-V so that CPU access non-coherent device memory as
NOCACHE which is better than accessing it as IO.
Fixes: ff689fd21c ("riscv: add RISC-V Svpbmt extension support")
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Tested-by: Han Gao <rabenda.cn@gmail.com>
Tested-by: Guo Ren (Alibaba DAMO Academy) <guoren@kernel.org>
Link: https://lore.kernel.org/r/20250820152316.1012757-1-apatel@ventanamicro.com
Signed-off-by: Paul Walmsley <pjw@kernel.org>
In the pegasus_notetaker driver, the pegasus_probe() function allocates
the URB transfer buffer using the wMaxPacketSize value from
the endpoint descriptor. An attacker can use a malicious USB descriptor
to force the allocation of a very small buffer.
Subsequently, if the device sends an interrupt packet with a specific
pattern (e.g., where the first byte is 0x80 or 0x42),
the pegasus_parse_packet() function parses the packet without checking
the allocated buffer size. This leads to an out-of-bounds memory access.
Fixes: 1afca2b66a ("Input: add Pegasus Notetaker tablet driver")
Signed-off-by: Seungjin Bae <eeodqql09@gmail.com>
Link: https://lore.kernel.org/r/20251007214131.3737115-2-eeodqql09@gmail.com
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
When splitting the RTL8221B-VM-CG into C22 and C45 variants, the name was
accidentally changed to RTL8221B-VN-CG. This patch brings back the previous
part number.
Fixes: ad5ce743a6 ("net: phy: realtek: Add driver instances for rtl8221b via Clause 45")
Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20251016192325.2306757-1-olek2@wp.pl
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The blamed commit increased the needed headroom to account for
alignment. This means that the size required to always align a Tx buffer
was added inside the dpaa2_eth_needed_headroom() function. By doing
that, a manual adjustment of the pointer passed to PTR_ALIGN() was no
longer correct since the 'buffer_start' variable was already pointing
to the start of the skb's memory.
The behavior of the dpaa2-eth driver without this patch was to drop
frames on Tx even when the headroom was matching the 128 bytes
necessary. Fix this by removing the manual adjust of 'buffer_start' from
the PTR_MODE call.
Closes: https://lore.kernel.org/netdev/70f0dcd9-1906-4d13-82df-7bbbbe7194c6@app.fastmail.com/T/#u
Fixes: f422abe3f2 ("dpaa2-eth: increase the needed headroom to account for alignment")
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Tested-by: Mathew McBride <matt@traverse.com.au>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20251016135807.360978-1-ioana.ciornei@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This patch fixes ce7a381697 ("net: bonding: add broadcast_neighbor option for 802.3ad").
Before this commit, on the broadcast mode, all devices were traversed using the
bond_for_each_slave_rcu. This patch supports traversing devices by using all_slaves.
Therefore, we need to update the slave array when enslave or release slave.
Fixes: ce7a381697 ("net: bonding: add broadcast_neighbor option for 802.3ad")
Cc: Simon Horman <horms@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Andrew Lunn <andrew+netdev@lunn.ch>
Cc: <stable@vger.kernel.org>
Reported-by: Jiri Slaby <jirislaby@kernel.org>
Tested-by: Jiri Slaby <jirislaby@kernel.org>
Link: https://lore.kernel.org/all/a97e6e1e-81bc-4a79-8352-9e4794b0d2ca@kernel.org/
Signed-off-by: Tonghao Zhang <tonghao@bamaicloud.com>
Reviewed-by: Hangbin Liu <liuhangbin@gmail.com>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Acked-by: Jay Vosburgh <jv@jvosburgh.net>
Link: https://patch.msgid.link/20251016125136.16568-1-tonghao@bamaicloud.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
cloud-ifupdown-helper patch and reattach-vf.sh script are rendered in
htmldocs output as normal paragraphs instead of literal code blocks
due to missing separator from respective code block marker. Add it.
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20251016093936.29442-2-bagasdotme@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The ENETC RX ring uses the page halves flipping mechanism, each page is
split into two halves for the RX ring to use. And ENETC_RXB_TRUESIZE is
defined to 2048 to indicate the size of half a page. However, the page
size is configurable, for ARM64 platform, PAGE_SIZE is default to 4K,
but it could be configured to 16K or 64K.
When PAGE_SIZE is set to 16K or 64K, ENETC_RXB_TRUESIZE is not correct,
and the RX ring will always use the first half of the page. This is not
consistent with the description in the relevant kernel doc and commit
messages.
This issue is invisible in most cases, but if users want to increase
PAGE_SIZE to receive a Jumbo frame with a single buffer for some use
cases, it will not work as expected, because the buffer size of each
RX BD is fixed to 2048 bytes.
Based on the above two points, we expect to correct ENETC_RXB_TRUESIZE
to (PAGE_SIZE >> 1), as described in the comment.
Fixes: d4fd0404c1 ("enetc: Introduce basic PF and VF ENETC ethernet drivers")
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Reviewed-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Link: https://patch.msgid.link/20251016080131.3127122-1-wei.fang@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
After applying the workaround for err050089, the LS1028A platform
experiences RCU stalls on RT kernel. This issue is caused by the
recursive acquisition of the read lock enetc_mdio_lock. Here list some
of the call stacks identified under the enetc_poll path that may lead to
a deadlock:
enetc_poll
-> enetc_lock_mdio
-> enetc_clean_rx_ring OR napi_complete_done
-> napi_gro_receive
-> enetc_start_xmit
-> enetc_lock_mdio
-> enetc_map_tx_buffs
-> enetc_unlock_mdio
-> enetc_unlock_mdio
After enetc_poll acquires the read lock, a higher-priority writer attempts
to acquire the lock, causing preemption. The writer detects that a
read lock is already held and is scheduled out. However, readers under
enetc_poll cannot acquire the read lock again because a writer is already
waiting, leading to a thread hang.
Currently, the deadlock is avoided by adjusting enetc_lock_mdio to prevent
recursive lock acquisition.
Fixes: 6d36ecdbc4 ("net: enetc: take the MDIO lock only once per NAPI poll cycle")
Signed-off-by: Jianpeng Chang <jianpeng.chang.cn@windriver.com>
Acked-by: Wei Fang <wei.fang@nxp.com>
Link: https://patch.msgid.link/20251015021427.180757-1-jianpeng.chang.cn@windriver.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
- Explicitly encode the XZR register if the value passed to
write_sysreg_s() is 0. The GIC CDEOI instruction is encoded as a
system register write with XZR as the source register. However, clang
does not honour the "Z" register constraint, leading to incorrect
code generation
- Ensure the interrupts (DAIF.IF) are unmasked when completing
single-step of a suspended breakpoint before calling
exit_to_user_mode(). With pseudo-NMIs, interrupts are (additionally)
masked at the PMR_EL1 register, handled by local_irq_*()
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Catalin Marinas:
- Explicitly encode the XZR register if the value passed to
write_sysreg_s() is 0.
The GIC CDEOI instruction is encoded as a system register write with
XZR as the source register. However, clang does not honour the "Z"
register constraint, leading to incorrect code generation
- Ensure the interrupts (DAIF.IF) are unmasked when completing
single-step of a suspended breakpoint before calling
exit_to_user_mode().
With pseudo-NMIs, interrupts are (additionally) masked at the PMR_EL1
register, handled by local_irq_*()
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: debug: always unmask interrupts in el0_softstp()
arm64/sysreg: Fix GIC CDEOI instruction encoding
Some RISC-V fixes for v6.18-rc2, including changes to:
- Disable CFI with Rust for any platform other than x86 and ARM64
- Keep task mm_cpumasks up-to-date to avoid triggering M-mode firmware
warnings if the kernel tries to send an IPI to an offline CPU
- Improve kprobe address validation performance and avoid desyncs
(following x86)
- Avoid duplicate device probes by avoiding DT hardware probing when
ACPI is enabled in early boot
- Use the correct set of dependencies for CONFIG_ARCH_HAS_ELF_CORE_EFLAGS,
avoiding an allnoconfig warning
- Fix a few other minor issues
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Merge tag 'riscv-for-linux-6.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fixes from Paul Walmsley:
- Disable CFI with Rust for any platform other than x86 and ARM64
- Keep task mm_cpumasks up-to-date to avoid triggering M-mode firmware
warnings if the kernel tries to send an IPI to an offline CPU
- Improve kprobe address validation performance and avoid desyncs
(following x86)
- Avoid duplicate device probes by avoiding DT hardware probing when
ACPI is enabled in early boot
- Use the correct set of dependencies for
CONFIG_ARCH_HAS_ELF_CORE_EFLAGS, avoiding an allnoconfig warning
- Fix a few other minor issues
* tag 'riscv-for-linux-6.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
riscv: kprobes: convert one final __ASSEMBLY__ to __ASSEMBLER__
riscv: Respect dependencies of ARCH_HAS_ELF_CORE_EFLAGS
riscv: acpi: avoid errors caused by probing DT devices when ACPI is used
riscv: kprobes: Fix probe address validation
riscv: entry: fix typo in comment 'instruciton' -> 'instruction'
RISC-V: clear hot-unplugged cores from all task mm_cpumasks to avoid rfence errors
riscv: kgdb: Ensure that BUFMAX > NUMREGBYTES
rust: cfi: only 64-bit arm and x86 support CFI_CLANG
Regardless of the DeviceContext of a device, we can't give any
guarantees about the DeviceContext of its parent device.
This is very subtle, since it's only caused by a simple typo, i.e.
Self::from_raw(parent)
which preserves the DeviceContext in this case, vs.
Device::from_raw(parent)
which discards the DeviceContext.
(I should have noticed it doing the correct thing in auxiliary::Device
subsequently, but somehow missed it.)
Hence, fix both Device::parent() and auxiliary::Device::parent().
Cc: stable@vger.kernel.org
Fixes: a4c9f71e34 ("rust: device: implement Device::parent()")
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
This fixes the following build error
CLNG-BPF [test_progs] verifier_global_ptr_args.bpf.o
progs/verifier_global_ptr_args.c:228:5: error: redefinition of 'off' as
different kind of symbol
228 | u32 off;
| ^
The symbol 'off' was previously defined in
tools/testing/selftests/bpf/tools/include/vmlinux.h, which includes an
enum i40e_ptp_gpio_pin_state from
drivers/net/ethernet/intel/i40e/i40e_ptp.c:
enum i40e_ptp_gpio_pin_state {
end = -2,
invalid = -1,
off = 0,
in_A = 1,
in_B = 2,
out_A = 3,
out_B = 4,
};
This enum is included when CONFIG_I40E is enabled. As of commit
032676ff82 ("LoongArch: Update Loongson-3 default config file"),
CONFIG_I40E is set in the defconfig, which leads to the conflict.
Renaming the local variable avoids the redefinition and allows the
build to succeed.
Suggested-by: Yonghong Song <yonghong.song@linux.dev>
Signed-off-by: Brahmajit Das <listout@listout.xyz>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20251017171551.53142-1-listout@listout.xyz
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
The timer mode is initialized to NO_PREEMPT mode by default,
this disables preemption and force execution in atomic context
causing issue on PREEMPT_RT configurations when invoking
spin_lock_bh(), leading to the following warning:
BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 6107, name: syz.0.17
preempt_count: 1, expected: 0
RCU nest depth: 1, expected: 1
Preemption disabled at:
[<ffffffff891fce58>] bpf_test_timer_enter+0xf8/0x140 net/bpf/test_run.c:42
Fix this, by removing NO_PREEMPT/NO_MIGRATE mode check.
Also, the test timer context no longer needs explicit calls to
migrate_disable()/migrate_enable() with rcu_read_lock()/rcu_read_unlock().
Use helpers rcu_read_lock_dont_migrate() and rcu_read_unlock_migrate()
instead.
Reported-by: syzbot+1f1fbecb9413cdbfbef8@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=1f1fbecb9413cdbfbef8
Suggested-by: Yonghong Song <yonghong.song@linux.dev>
Suggested-by: Menglong Dong <menglong.dong@linux.dev>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
Tested-by: syzbot+1f1fbecb9413cdbfbef8@syzkaller.appspotmail.com
Co-developed-by: Brahmajit Das <listout@listout.xyz>
Signed-off-by: Brahmajit Das <listout@listout.xyz>
Signed-off-by: Sahil Chandna <chandna.sahil@gmail.com>
Link: https://lore.kernel.org/r/20251014185635.10300-1-chandna.sahil@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
We intend that EL0 exception handlers unmask all DAIF exceptions
before calling exit_to_user_mode().
When completing single-step of a suspended breakpoint, we do not call
local_daif_restore(DAIF_PROCCTX) before calling exit_to_user_mode(),
leaving all DAIF exceptions masked.
When pseudo-NMIs are not in use this is benign.
When pseudo-NMIs are in use, this is unsound. At this point interrupts
are masked by both DAIF.IF and PMR_EL1, and subsequent irq flag
manipulation may not work correctly. For example, a subsequent
local_irq_enable() within exit_to_user_mode_loop() will only unmask
interrupts via PMR_EL1 (leaving those masked via DAIF.IF), and
anything depending on interrupts being unmasked (e.g. delivery of
signals) will not work correctly.
This was detected by CONFIG_ARM64_DEBUG_PRIORITY_MASKING.
Move the call to `try_step_suspended_breakpoints()` outside of the check
so that interrupts can be unmasked even if we don't call the step handler.
Fixes: 0ac7584c08 ("arm64: debug: split single stepping exception entry")
Cc: <stable@vger.kernel.org> # 6.17
Signed-off-by: Ada Couprie Diaz <ada.coupriediaz@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
[catalin.marinas@arm.com: added Mark's rewritten commit log and some whitespace]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
The GIC CDEOI system instruction requires the Rt field to be set to 0b11111
otherwise the instruction behaviour becomes CONSTRAINED UNPREDICTABLE.
Currenly, its usage is encoded as a system register write, with a constant
0 value:
write_sysreg_s(0, GICV5_OP_GIC_CDEOI)
While compiling with GCC, the 0 constant value, through these asm
constraints and modifiers ('x' modifier and 'Z' constraint combo):
asm volatile(__msr_s(r, "%x0") : : "rZ" (__val));
forces the compiler to issue the XZR register for the MSR operation (ie
that corresponds to Rt == 0b11111) issuing the right instruction encoding.
Unfortunately LLVM does not yet understand that modifier/constraint
combo so it ends up issuing a different register from XZR for the MSR
source, which in turns means that it encodes the GIC CDEOI instruction
wrongly and the instruction behaviour becomes CONSTRAINED UNPREDICTABLE
that we must prevent.
Add a conditional to write_sysreg_s() macro that detects whether it
is passed a constant 0 value and issues an MSR write with XZR as source
register - explicitly doing what the asm modifier/constraint is meant to
achieve through constraints/modifiers, fixing the LLVM compilation issue.
Fixes: 7ec80fb3f0 ("irqchip/gic-v5: Add GICv5 PPI support")
Suggested-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Acked-by: Marc Zyngier <maz@kernel.org>
Cc: stable@vger.kernel.org
Cc: Sascha Bischoff <sascha.bischoff@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Marc Zyngier <maz@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
