Add a dequeue_remote test that makes moves of tasks in the BPF
scheduler's custody to another CPU's local DSQ the common case, both via
SCX_DSQ_LOCAL_ON dispatch and via scx_bpf_dsq_move_to_local(). The BPF
scheduler tracks each task's custody state and triggers scx_bpf_error()
if a custody period doesn't end with exactly one ops.dequeue() before
the task runs, or if it ends with an SCX_DEQ_CORE_SCHED_EXEC dequeue of
a task without a core cookie.
Without the previous patch, the test fails with:
sched_ext: dequeue_remote: dequeue_remote.bpf.c:141: 15 (rcu_preempt): late ops.dequeue() with SCX_DEQ_CORE_SCHED_EXEC (enq_cpu=3 cpu=2 seq=1)
...
ops_dequeue+0x114/0x170
set_next_task_scx+0x104/0x1e0
__pick_next_task+0xc7/0x180
__schedule+0x154/0x1870
Reviewed-by: Andrea Righi <arighi@nvidia.com>
Assisted-by: Claude:claude-opus-5.5
Signed-off-by: Kuba Piecuch <jpiecuch@google.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Add a regression test for a gap-filling packet whose acknowledgment has
become old. Linux first sends data to the peer. Deliver two peer data
packets out of order: the later packet acknowledges Linux's data, while
the delayed packet still carries the earlier acknowledgment.
Require the ACK that closes the receive gap to echo the delayed packet's
timestamp, 301000. Without the fix, Linux accepts the data but still echoes
the previously saved timestamp, 1000. Also check that the application can
read all 34 bytes.
Use a large jump in peer timestamps to represent the idle interval, with
no real wait, loss or retransmission. The test directly checks the outgoing
timestamp echo. It requires packetdrill's merged TSecr verification fix
(linked below); older tools incorrectly pass on an unfixed kernel.
Use the existing packetdrill selftest runner for IPv4, IPv6 and
IPv4-mapped IPv6.
Link: 83f72d3f90
Assisted-by: LLM
Signed-off-by: Jeff Jo <jeffjo@openai.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Exercise software UDP checksums when splice() transfers multiple pipe
fragments into a corked datagram. Use separate source pipes so short writes
cannot merge, and use odd fragment lengths to expose checksum-position
errors between fragments.
Cover IPv4, IPv6 and IPv4-mapped destinations, connected and unconnected
sockets, resident prefixes, even and odd fragment lengths, and a fragment
starting near a page boundary. Ordinary sends provide a control. Check the
complete payload and reject extra datagrams after a successful send.
Keep receive waits bounded and skip unavailable address families or pipe
capacities. The test uses only loopback sockets with ephemeral ports and
has no dependency on the application that exposed the regression.
Signed-off-by: Alireza Asgari <alireza@asgari.net>
Link: https://patch.msgid.link/20260924-fix-udp-splice-checksum-v1-2-fe61d65447a8@asgari.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Userspace can hide a feature from a guest by clearing its field in a
writable ID register, and KVM then makes the feature's instructions
UNDEFINED in the guest by trapping or disabling them. No selftest checks
that.
Add a test that runs the instruction of each of TLBI OS, MOPS, TCR2_EL1
and FPMR once with its field as advertised and once with it cleared, and
expects an UNDEF only when cleared. A feature the vCPU doesn't advertise
is skipped, as is hidden TLBI OS on a CPU with neither FGT nor
FEAT_EVT2, where KVM can't trap it.
Signed-off-by: Fuad Tabba <fuad.tabba@linux.dev>
Link: https://patch.msgid.link/20260929090031.3829185-5-fuad.tabba@linux.dev
Signed-off-by: Oliver Upton <oupton@kernel.org>
Add a test for the use-after-free fixed by the previous commit. A
sleepable prog on bpf_fentry_test1() blocks a task on a userfaultfd
page, like bpf_mod_race does, while the two progs that run after it in
the same trampoline are detached and freed one after the other, which
the test knows from their .bss maps going away. After the first detach
the task is in an image that isn't the trampoline's current one
anymore. The task is then released and must not call into the freed
progs. This is done with fentry progs, with fexit progs, where the task
is already past the original function, and with a task sleeping in a
fentry prog while fexit progs are detached, where the original function
must still be called. bpf_mod_race's userfaultfd helper moves to
testing_helpers.c so that both tests can use it.
Without the fix, on a kernel with KASAN:
BUG: KASAN: vmalloc-out-of-bounds in __bpf_prog_enter_recur+0xed/0x1e0
Read of size 8 at addr ffa0000000144040 by task test_progs/171
CPU: 6 UID: 0 PID: 171 Comm: test_progs Tainted: G OE 7.2.0+ #1 PREEMPT(full)
Call Trace:
<TASK>
__bpf_prog_enter_recur+0xed/0x1e0
bpf_trampoline_6442545468+0x72/0xe3
bpf_fentry_test1+0x9/0x20
bpf_prog_test_run_tracing+0x183/0x3e0
__sys_bpf+0xd3f/0x38f0
...
Signed-off-by: Florent Revest (Anthropic) <florent.revest@linux.dev>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://patch.msgid.link/20260926135605.1217928-4-florent.revest@linux.dev
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-ID: <20260813223610.2043560-7-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-ID: <20260813223610.2043560-6-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
- A cpuset partition could claim CPUs an ancestor partition already held
exclusively. Restore the rejection an earlier change had turned into a
warning.
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Merge tag 'cgroup-for-7.3-rc4-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup fix from Tejun Heo:
- A cpuset partition could claim CPUs an ancestor partition already
held exclusively. Restore the rejection an earlier change had turned
into a warning.
* tag 'cgroup-for-7.3-rc4-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
cgroup/cpuset: Return PERR_NOCPUS in remote_partition_enable() on subpartitions_cpus conflict
- The CPU topology helper for BPF schedulers took no buffer size, so its
structure couldn't grow without breaking schedulers built against the
older layout. Add a size argument.
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Merge tag 'sched_ext-for-7.3-rc4-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext
Pull sched_ext fix from Tejun Heo:
- The CPU topology helper for BPF schedulers took no buffer size, so
its structure couldn't grow without breaking schedulers built against
the older layout. Add a size argument.
* tag 'sched_ext-for-7.3-rc4-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext:
sched_ext: Add a size argument to scx_bpf_cid_topo() so struct scx_cid_topo can grow
scx_bpf_cid_topo() copies struct scx_cid_topo into a buffer the BPF program
sized from its own vmlinux.h while the verifier sizes the write from the
running kernel's BTF. The struct may grow and each growth then breaks every
scheduler built against the older layout, rejected at load or written past
its buffer. This is the usual hole for a struct handed to BPF, closed
elsewhere with a size argument, and it was missed here.
Take the buffer size, copy the smaller of it and the kernel's struct and set
the rest to -1. Accesses to the copy are CO-RE relocated, so the struct can
grow by appending fields, which its comment now states. The kfunc changes in
place: the cid interface is still being finalized and no released scheduler
uses the current form.
Fixes: e9b55af47e ("sched_ext: Add topological CPU IDs (cids)")
Cc: stable@vger.kernel.org # v7.2+
Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Andrea Righi <arighi@nvidia.com>
When a remote partition is created underneath an existing local partition
via a non-partition (PRS_MEMBER) intermediate cgroup, update_prstate() sees
parent->partition_root_state == PRS_MEMBER and calls
remote_partition_enable().
Commit 86888c7bd1 ("cgroup/cpuset: Add warnings to catch inconsistency
in exclusive CPUs") replaced the cpumask_intersects(tmp->new_cpus,
subpartitions_cpus) error check in remote_partition_enable() with
WARN_ON_ONCE(). As a result, remote_partition_enable() emits a warning
and proceeds to enable the remote partition on CPUs that are already
owned by the ancestor local partition in subpartitions_cpus.
This can be reproduced on Linux 7.3.0-rc3 with:
mkdir -p /tmp/cg1
mount -t cgroup2 none /tmp/cg1
echo "+cpuset" > /tmp/cg1/cgroup.subtree_control
mkdir /tmp/cg1/A
echo 1 > /tmp/cg1/A/cpuset.cpus
echo 1 > /tmp/cg1/A/cpuset.cpus.exclusive
echo root > /tmp/cg1/A/cpuset.cpus.partition
echo "+cpuset" > /tmp/cg1/A/cgroup.subtree_control
mkdir /tmp/cg1/A/B
echo 1 > /tmp/cg1/A/B/cpuset.cpus
echo 1 > /tmp/cg1/A/B/cpuset.cpus.exclusive
echo "+cpuset" > /tmp/cg1/A/B/cgroup.subtree_control
mkdir /tmp/cg1/A/B/D
echo 1 > /tmp/cg1/A/B/D/cpuset.cpus
echo 1 > /tmp/cg1/A/B/D/cpuset.cpus.exclusive
echo root > /tmp/cg1/A/B/D/cpuset.cpus.partition
which triggers:
WARNING: kernel/cgroup/cpuset.c:1594 at remote_partition_enable+0x1c1/0x300
and leaves both /tmp/cg1/A and /tmp/cg1/A/B/D as active root partitions
claiming exclusive CPU 1.
Fix this by returning PERR_NOCPUS when tmp->new_cpus intersects
subpartitions_cpus in remote_partition_enable(), matching the error code
used by remote_cpus_update() for the same subpartitions_cpus conflict, and
add a regression test case to
tools/testing/selftests/cgroup/test_cpuset_prs.sh.
Tested in QEMU on Linux 7.3.0-rc3 using the reproducer above and
tools/testing/selftests/cgroup/test_cpuset_prs.sh.
Fixes: 86888c7bd1 ("cgroup/cpuset: Add warnings to catch inconsistency in exclusive CPUs")
Suggested-by: Guopeng Zhang <guopeng.zhang@linux.dev>
Cc: stable@vger.kernel.org
Assisted-by: LLM
Signed-off-by: Hui Peng <benquike@gmail.com>
Reviewed-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
- kprobes: Fix permanent hang when flushing the kprobe optimizer
Fix a deadlock when disabling kprobe optimization via sysctl or debugfs
where flushers hung waiting for optimizer_completion. Replaced the
completion with an optimizer_passes counter and wait_var_event_mutex()
under kprobe_mutex so concurrent flushers can wait and wake up safely.
- fprobe: Terminate the fgraph_data list when the reservation is not filled
Fix an issue where unused shadow stack data left uninitialized by
fprobe_fgraph_entry() was misparsed as stale fprobe headers on return.
Explicitly write a zero word to terminate the list and update
read_fprobe_header() to handle the zeroed slot properly.
- ftracetest: Fix unique symbol check in kprobe_non_uniq_symbol.tc
Fix false test failures in kprobe_non_uniq_symbol.tc on architectures
like s390 where a symbol exists once in core kernel but also in modules.
Anchor the /proc/kallsyms search regex to the end of the line so that
module symbols are not incorrectly counted.
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Merge tag 'probes-fixes-v7.3-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull probe fixes from Masami Hiramatsu:
- kprobes: Fix permanent hang when flushing the kprobe optimizer
Fix a deadlock when disabling kprobe optimization via sysctl or
debugfs where flushers hung waiting for optimizer_completion.
Replaced the completion with an optimizer_passes counter and
wait_var_event_mutex() under kprobe_mutex so concurrent flushers can
wait and wake up safely.
- fprobe: Terminate the fgraph_data list when the reservation is not
filled
Fix an issue where unused shadow stack data left uninitialized by
fprobe_fgraph_entry() was misparsed as stale fprobe headers on
return. Explicitly write a zero word to terminate the list and update
read_fprobe_header() to handle the zeroed slot properly.
- ftracetest: Fix unique symbol check in kprobe_non_uniq_symbol.tc
Fix false test failures in kprobe_non_uniq_symbol.tc on architectures
like s390 where a symbol exists once in core kernel but also in
modules. Anchor the /proc/kallsyms search regex to the end of the
line so that module symbols are not incorrectly counted.
* tag 'probes-fixes-v7.3-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
kprobes: Fix permanent hang when flushing the kprobe optimizer
fprobe: Terminate the fgraph_data list when the reservation is not filled
selftests/ftrace: Fix unique symbol check in kprobe_non_uniq_symbol.tc
- Invalidate the ITS translation cache when the guest changes the
base address of the ITS tables (Fuad Tabba)
- Skip saving ITS devices with device IDs that are out-of-bounds
rather than failing the entire ITS save ioctl (Fuad Tabba)
- Close race between VM teardown and invalidations of nested MMUs
when handling MMU operations that are allowed to block
(Lorenzo Stoakes)
- Various fixes for the handling of the host's untrusted SVE
configuration in pKVM (Fuad Tabba)
- Make sure that empty SMCCC ranges based at 0 are rejected by the
kvm_smccc_set_filter() (Karl Mehltretter)
- Revoke the host mapping for pKVM's private stack pages, along
with a new sanity check that all mappings in the hyp's private
VA range have been correctly marked as hyp-owned (Fuad Tabba)
- Lifetime fixes for the array of shadow stage-2 MMUs, ensuring that
concurrent vCPU initialization cannot relocate in-use MMUs. Defer
the freeing of shadow stage-2 MMUs to the point that no other users
(e.g. MMU notifier) could reference them (Marc Zyngier)
- Drop useless WARN when rejecting an unsupported ioctl for pKVM
(Fuad Tabba)
- Fix the steal_time selftest to install correctly-sized mappings for
non-4K hosts (Sebastian Ott)
- Correct mapping of fine-grained trap for GCSPOPX instruction
(Mark Brown)
- Fix KVM_BUG_ON() due to missing handling of DBGBXVR<n> from 32-bit
guests (Karl Mehltretter)
RISC-V:
- Synchronize hrtimer during VCPU teardown.
- Fix the conversion between vsip and hvip values.
- Serialize IMSIC attributes with vCPU migration.
- Release unused page after MMU invalidation.
- Propagate interrupted G-stage faults to KVM user-space as EINTR.
- Fix nested acceleration hfence entry update order.
- Fix sdata leak and stale snapshot_addr in snapshot_set_shmem.
- Preserve firmware counter value across PMU counter stop/start.
- Report PMU snapshot write failure to the guest.
- Fix perf-backed counter accounting across PMU stop and read.
- Correctly propagate error of a hart status SBI call.
s390:
- Ensure that accesses through kvm_arch_set_irq_inatomic mark as dirty
the pages that contain indicator and summary bits.
- Fix compile warning for kvm_s390_update_cmma_dirty().
- Fix incorrect propagation of ENOENT from _gaccess_shadow_fault() to
userspace.
- Move s390_kvm_mmu_commit_memory_region() into
s390_kvm_mmu_prepare_memory_region() so that it can fail instead of WARN.
- Add missing srcu in kvm_s390_set_irq_state().
- Fix potential races in storage functions.
- Fix race in _destroy_pages_crste().
- Fix issues in the handling of KVM interrupt and page resources, when a
queue that is assigned to a mediated device (mdev) is removed from the
host's AP configuration.
- Fix loop condition in uv_find_secrets.
- Prevent potential out-of-bounds read.
x86:
- Fix a brown paper bag bug where KVM would incorrectly treat Intel PMU MSRs
as valid on AMD.
- Fix a regression in the hardware disable selftest where it checked the wrong
macro when detecting glibc support (breaks at least musl).
- Never clear KVM_REQ_VM_DEAD so that dead VMs stay dead, which is especially
important for KVM_BUG_ON() flows, which often guard more dangerous bugs.
- Re-pend GET_NESTED_STATE_PAGES if getting the pages fails, to fix a bug
where KVM would let userspace run a broken setup with stale vmcs12 pages.
- Fix a class of bugs where KVM would fail to fill kvm_run exit fields if
getting nested pages failed.
- Treat reserved entries in the memory attributes xarray as "no attributes",
to fix false positives when checking for mixed attributes.
- Fix memcg accounting for the memory attributes xarray (the xarray library
subtly requires the xarray to be configured for accounting upfront; the gfp
flags taken at runtime are used only rarely).
- Don't pre-reserve xarray entries when storing empty attributes, as storing
NULL must not require memory allocation (KVM and other subsystems heavily
rely on this behavior).
- Fix a memory leak and a cache maintenance issue related to doing intra-host
migration on an SEV guest.
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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:
- Invalidate the ITS translation cache when the guest changes the
base address of the ITS tables (Fuad Tabba)
- Skip saving ITS devices with device IDs that are out-of-bounds
rather than failing the entire ITS save ioctl (Fuad Tabba)
- Close race between VM teardown and invalidations of nested MMUs
when handling MMU operations that are allowed to block (Lorenzo
Stoakes)
- Various fixes for the handling of the host's untrusted SVE
configuration in pKVM (Fuad Tabba)
- Make sure that empty SMCCC ranges based at 0 are rejected by the
kvm_smccc_set_filter() (Karl Mehltretter)
- Revoke the host mapping for pKVM's private stack pages, along with
a new sanity check that all mappings in the hyp's private VA range
have been correctly marked as hyp-owned (Fuad Tabba)
- Lifetime fixes for the array of shadow stage-2 MMUs, ensuring that
concurrent vCPU initialization cannot relocate in-use MMUs. Defer
the freeing of shadow stage-2 MMUs to the point that no other users
(e.g. MMU notifier) could reference them (Marc Zyngier)
- Drop useless WARN when rejecting an unsupported ioctl for pKVM
(Fuad Tabba)
- Fix the steal_time selftest to install correctly-sized mappings for
non-4K hosts (Sebastian Ott)
- Correct mapping of fine-grained trap for GCSPOPX instruction (Mark
Brown)
- Fix KVM_BUG_ON() due to missing handling of DBGBXVR<n> from 32-bit
guests (Karl Mehltretter)
RISC-V:
- Synchronize hrtimer during VCPU teardown
- Fix the conversion between vsip and hvip values
- Serialize IMSIC attributes with vCPU migration
- Release unused page after MMU invalidation
- Propagate interrupted G-stage faults to KVM user-space as EINTR
- Fix nested acceleration hfence entry update order
- Fix sdata leak and stale snapshot_addr in snapshot_set_shmem
- Preserve firmware counter value across PMU counter stop/start
- Report PMU snapshot write failure to the guest
- Fix perf-backed counter accounting across PMU stop and read
- Correctly propagate error of a hart status SBI call
s390:
- Ensure that accesses through kvm_arch_set_irq_inatomic mark as
dirty the pages that contain indicator and summary bits
- Fix compile warning for kvm_s390_update_cmma_dirty()
- Fix incorrect propagation of ENOENT from _gaccess_shadow_fault() to
userspace
- Move s390_kvm_mmu_commit_memory_region() into
s390_kvm_mmu_prepare_memory_region() so that it can fail instead of
WARN
- Add missing srcu in kvm_s390_set_irq_state()
- Fix potential races in storage functions
- Fix race in _destroy_pages_crste()
- Fix issues in the handling of KVM interrupt and page resources,
when a queue that is assigned to a mediated device (mdev) is
removed from the host's AP configuration
- Fix loop condition in uv_find_secrets
- Prevent potential out-of-bounds read
x86:
- Fix a brown paper bag bug where KVM would incorrectly treat Intel
PMU MSRs as valid on AMD
- Fix a regression in the hardware disable selftest where it checked
the wrong macro when detecting glibc support (breaks at least musl)
- Never clear KVM_REQ_VM_DEAD so that dead VMs stay dead, which is
especially important for KVM_BUG_ON() flows, which often guard more
dangerous bugs
- Re-pend GET_NESTED_STATE_PAGES if getting the pages fails, to fix a
bug where KVM would let userspace run a broken setup with stale
vmcs12 pages
- Fix a class of bugs where KVM would fail to fill kvm_run exit
fields if getting nested pages failed
- Treat reserved entries in the memory attributes xarray as "no
attributes", to fix false positives when checking for mixed
attributes
- Fix memcg accounting for the memory attributes xarray (the xarray
library subtly requires the xarray to be configured for accounting
upfront; the gfp flags taken at runtime are used only rarely)
- Don't pre-reserve xarray entries when storing empty attributes, as
storing NULL must not require memory allocation (KVM and other
subsystems heavily rely on this behavior)
- Fix a memory leak and a cache maintenance issue related to doing
intra-host migration on an SEV guest"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (54 commits)
KVM: SEV: Do cache maintenance on the source VM during intra-host migration
KVM: SEV: Free have_run_cpus during VM destruction even if VM is no longer SEV
KVM: Don't pre-reserve xarray entries when storing empty/NULL attributes
KVM: Ensure memory attributes xarray nodes are accounted to the caller's memcg
KVM: Don't treat reserved xarray entries as having memory attributes
KVM: x86: Fill kvm_run exit fields in common get_nested_state_pages() error paths
KVM: x86: Re-pend GET_NESTED_STATE_PAGES if getting said pages fails
KVM: arm64: Fix AArch32 DBGBXVR<n> handling
KVM: arm64: Fix FGT mapping for HFGITR_EL2.nGCSEPP
KVM: selftests: fix steal_time for arm64 with host page size > 4K
KVM: arm64: Don't WARN on an unknown VM ioctl in protected mode
KVM: arm64: nv: Delay freeing of shadow S2 structures until VM destruction
KVM: arm64: nv: Fix life cycle of the nested_mmus array
KVM: arm64: Check every private mapping is hyp-owned at pKVM init
KVM: arm64: Move the private VA allocation cursor to __io_map_next
KVM: arm64: Match hyp text by physical address in fix_host_ownership()
KVM: arm64: Transfer the hyp stack pages out of the host stage-2
KVM: arm64: selftests: Test empty SMCCC filter range at base 0
KVM: arm64: Return -EINVAL for an empty SMCCC filter range at base 0
KVM: arm64: Derive GUEST_HAS_SVE from the SVE feature bit at EL2
...
Add overmount_reparent_test:
- a mount that a file descriptor keeps alive after propagate_umount()
reparented its overmount and unmounted it must not be walked into the
freed overmount by move_mount(MOVE_MOUNT_BENEATH)
Link: https://patch.msgid.link/20260926-work-mount-fixes-2-v1-10-f357abf3d17b@kernel.org
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
Add unmounted_tree_test:
- a detached nsfs or pidfs bind mount that a file descriptor keeps
alive can't be copied recursively, a copy of the mount itself and
a copy of a mounted one still work
- a detached tree with a child that was vacated behind it can't be
copied recursively either
- a copy of a detached bind mount is an ordinary mount: unlinking its
mountpoint from another mount namespace unmounts it
- mount_setattr() refuses to change the propagation of a detached
tree and still allows it for the root of an anonymous mount
namespace
Every case runs in a user and mount namespace of its own.
Link: https://patch.msgid.link/20260926-work-mount-fixes-2-v1-9-f357abf3d17b@kernel.org
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-ID: <20260813223610.2043560-5-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-ID: <20260813223610.2043560-4-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Add a selftest to verify that KVM intercepts x2APIC MSR accesses for L1
after APICv is inhibited while L2 is active. This is a regression test for
an AVIC bug where KVM would skip updating x2APIC MSR intercepts while L2
is active, thus giving L1 access to a wide swath of L0's x2APIC surface.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-ID: <20260710162052.2188574-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
- Fix a brown paper bag bug where KVM would incorrectly treat Intel PMU MSRs
as valid on AMD.
- Fix a regression in the hardware disable selftest where it checked the wrong
macro when detecting glibc support (breaks at least musl).
- Never clear KVM_REQ_VM_DEAD so that dead VMs stay dead, which is especially
important for KVM_BUG_ON() flows, which often guard more dangerous bugs.
- Re-pend GET_NESTED_STATE_PAGES if getting the pages fails, to fix a bug
where KVM would let userspace run a broken setup with stale vmcs12 pages.
- Fix a class of bugs where KVM would fail to fill kvm_run exit fields if
getting nested pages failed.
- Treat reserved entries in the memory attributes xarray as "no attributes",
to fix false positives when checking for mixed attributes.
- Fix memcg accounting for the memory attributes xarray (the xarray library
subtly requires the xarray to be configured for accounting upfront; the gfp
flags taken at runtime are used only rarely).
- Don't pre-reserve xarray entries when storing empty attributes, as storing
NULL must not require memory allocation (KVM and other subsystems heavily
rely on this behavior).
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Merge tag 'kvm-x86-fixes-7.3-rc5' of https://github.com/kvm-x86/linux into HEAD
KVM fixes for 7.3-rcN
- Fix a brown paper bag bug where KVM would incorrectly treat Intel PMU MSRs
as valid on AMD.
- Fix a regression in the hardware disable selftest where it checked the wrong
macro when detecting glibc support (breaks at least musl).
- Never clear KVM_REQ_VM_DEAD so that dead VMs stay dead, which is especially
important for KVM_BUG_ON() flows, which often guard more dangerous bugs.
- Re-pend GET_NESTED_STATE_PAGES if getting the pages fails, to fix a bug
where KVM would let userspace run a broken setup with stale vmcs12 pages.
- Fix a class of bugs where KVM would fail to fill kvm_run exit fields if
getting nested pages failed.
- Treat reserved entries in the memory attributes xarray as "no attributes",
to fix false positives when checking for mixed attributes.
- Fix memcg accounting for the memory attributes xarray (the xarray library
subtly requires the xarray to be configured for accounting upfront; the gfp
flags taken at runtime are used only rarely).
- Don't pre-reserve xarray entries when storing empty attributes, as storing
NULL must not require memory allocation (KVM and other subsystems heavily
rely on this behavior).
Please consider pulling these changes from the signed vfs-7.3-rc5.fixes tag.
Thanks!
Christian
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Merge tag 'vfs-7.3-rc5.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull vfs fixes from Christian Brauner:
- Revert "put_mnt_ns(): leave mounts connected". This allows the
creation of reference count cycles in a very trivial way. We can't
bring this in until we have fixed the underlying cause
- vfs: Don't create the private nullfs instance for kthreads under
namespace_sem to avoid false lockdeps complaints
- binfmt_misc:
- Copy the name into a stack buffer and look up the copy in
bpf_binprm_select_interp()
- bpf_binprm_set_interp() and bpf_binprm_set_interp_arg(): Check
the private copy instead so the string that gets staged is the
kstring that was checked
- netfs:
- Make netfs_read_gaps() use separate sink folios rather than one
reused sink folio to discard unwanted data so that cifs checksum
checking sees all the data that was fetched
- Trim reads down to i_size so afs symlinks read correctly from the
cache
- Wrap the direct mempool ->alloc() calls the GFP_KERNEL paths make
in alloc_hooks() via a new mempool_alloc_noreserve() helper
- iov_iter: Use iov_iter_alignment() for the start and length check
added to iov_iter_extract_bvecs() this cycle. It used iter_iov_addr()
and iter_iov_len() which are only valid for ITER_UBUF and ITER_IOVEC
iterators
- super: Make iterate_supers_type() deletion-safe
- inode: Stop evict_inodes() from rescanning the same inodes
- writeback: Bound the cleanup_offline_cgwb() rescans
- ntfs3: Use d_instantiate_new() in ntfs_create_inode()
- ovl: Fix a use-after-free in the ovl_do_mkdir() debug print
- dcache: Unpoison the inline name buffer in __d_alloc() for KMSAN
- autofs: Fix a pipe file reference leak in autofs_kill_sb()
- bpf: Drop the path_unlink and path_rmdir hooks from the list of hooks
for which the verifier rewrites bpf_{set,remove}_dentry_xattr() to
the _locked variants
- squashfs: Range check the xz dictionary size before shifting by it
- selftests: Add the missing eventfd, open_tree_ns, openat2 and xattr
filesystems selftests to TARGETS and drop the stale openat2 entry
left behind when those tests moved
* tag 'vfs-7.3-rc5.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
netfs: Fix missing alloc tagging of direct mempool allocations
bpf: fs/xattr: don't assume the inode is locked in path_unlink/path_rmdir
autofs: fix sbi->pipe file reference leak in autofs_kill_sb()
dcache: unpoison the inline name buffer in __d_alloc()
ovl: fix UAF in ovl_do_mkdir() debug print
super: make iterate_supers_type() deletion-safe
Revert "put_mnt_ns(): leave mounts connected"
Revert "selftests/filesystems: add mntns cleanup test"
binfmt_misc: fix racy checks in bpf set_interp kfuncs
binfmt_misc: fix OOB read in bpf_binprm_select_interp()
fs: don't create the private nullfs mount under namespace_sem
writeback: bound cleanup_offline_cgwb() rescans by rotating scanned inodes
fs: avoid repeated scans in evict_inodes()
netfs, afs: Fix symlink reading
netfs: Fix netfs_read_gaps() to use separate sink folios
squashfs: Add dictionary size range check to prevent shift-out-of-bounds
fs/ntfs3: use d_instantiate_new() in ntfs_create_inode() and murder syzbot's "WARNING in do_new_mount" saga
selftests/filesystems: fix missing and stale TARGETS entries
block: Fix start and length check added to iov_iter_extract_bvecs()
A slave namespace moves an open_tree() copy of the shared tree beneath
the propagated copy of the victim and keeps the descriptor. Check that:
- umount(2) of the victim fails with EBUSY while the descriptor is open
- the moved tree is still attached in the slave namespace afterwards
- the umount succeeds once the descriptor is closed
The test needs CAP_SYS_ADMIN and skips otherwise.
Link: https://patch.msgid.link/20260923-work-mount-fixes-v1-6-f424cf8d3242@kernel.org
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
MOVE_MOUNT_SET_GROUP must not accept an unbindable mount as the target.
Cover both sources:
- a slave, which used to leave the target unbindable and a slave at once
- a shared mount, which used to silently drop the unbindable flag
Check that the target is untouched after the refused call.
Link: https://patch.msgid.link/20260923-work-mount-fixes-v1-4-f424cf8d3242@kernel.org
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
Make a tmpfs unbindable, copy the mount namespace and check from the
copy that:
- a bind of the mount fails with EINVAL
- a recursive bind fails as well
- open_tree(OPEN_TREE_CLONE) of it fails
- mountinfo still shows it as unbindable
- a copy of the copy refuses the bind too
The first case runs in the original namespace so the fixture stays
honest about what it set up.
Link: https://patch.msgid.link/20260923-work-mount-fixes-v1-2-f424cf8d3242@kernel.org
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
If the transport driver returns an error, we should ensure we actually
get the error, not a success value.
Acked-by: Jiri Kosina <jkosina@suse.com>
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
- A task reenqueued while its dispatch was still completing had its queued
state clobbered by the dispatcher, dropping every later dispatch of the
task. Wait for the in-flight dispatch to settle first.
- A wakeup activation on another CPU marked the destination runqueue as
mid-wakeup, stranding a pending local reenqueue. If the scheduler was
unloaded first, the stale request pointed into freed memory that the next
scheduler dereferenced.
- ops.dequeue() ran with the source dispatch queue's lock held, so a
scheduler iterating that queue from the callback deadlocked the CPU.
- Schedulers with their own CPU ID mapping had no way to learn a task's
initial CPU mask and rebuilt it themselves, which went wrong across
sub-scheduler enable and re-home. Pass it to ops.enable().
- A bypass dispatch event counter missed the dispatches made by the
end-of-dispatch fallback and under-reported.
- Selftests for the dequeue locking and initial mask changes.
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Merge tag 'sched_ext-for-7.3-rc4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext
Pull sched_ext fixes from Tejun Heo:
- A task reenqueued while its dispatch was still completing had its
queued state clobbered by the dispatcher, dropping every later
dispatch of the task. Wait for the in-flight dispatch to settle
first
- A wakeup activation on another CPU marked the destination runqueue as
mid-wakeup, stranding a pending local reenqueue. If the scheduler was
unloaded first, the stale request pointed into freed memory that the
next scheduler dereferenced
- ops.dequeue() ran with the source dispatch queue's lock held, so a
scheduler iterating that queue from the callback deadlocked the CPU
- Schedulers with their own CPU ID mapping had no way to learn a task's
initial CPU mask and rebuilt it themselves, which went wrong across
sub-scheduler enable and re-home. Pass it to ops.enable()
- A bypass dispatch event counter missed the dispatches made by the
end-of-dispatch fallback and under-reported
- Selftests for the dequeue locking and initial mask changes
* tag 'sched_ext-for-7.3-rc4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext:
sched_ext: Count SCX_EV_SUB_BYPASS_DISPATCH in the dispatch fallback
selftests/sched_ext: Check the cmask cid-form ops.enable() receives
sched_ext: Pass the initial cmask to cid-form ops.enable()
selftests/sched_ext: Test that ops.dequeue() can iterate the consumed DSQ
sched_ext: Don't run ops.dequeue() with a DSQ lock held
sched_ext: Derive SCX_RQ_IN_WAKEUP from the core enqueue flags
sched_ext: Wait for SCX_OPSS_DISPATCHING before reenqueueing a task
- With local event accounting, a fork rejected by the pids controller
updated pids.events without notifying its pollers.
- A cgroup selftest failed to compile with fortification enabled because
an O_TMPFILE open lacked its mode argument.
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Merge tag 'cgroup-for-7.3-rc4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup fixes from Tejun Heo:
- With local event accounting, a fork rejected by the pids controller
updated pids.events without notifying its pollers
- A cgroup selftest failed to compile with fortification enabled
because an O_TMPFILE open lacked its mode argument
* tag 'cgroup-for-7.3-rc4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
cgroup/pids: Restore pids.events notifications in local mode
selftests: cgroup: give the O_TMPFILE open in get_temp_fd() a mode
Every week in this release is record-setting for number of posted
patches. It doesn't seem like we're creating any regressions with
all these fixes, 3 Fixes tags here point to 7.2 commits but none
are true regression fixes. We're trying to keep the count down,
nonetheless.
Previous releases - regressions:
- net: don't require the hwtstamp NDOs when a PHY provides timestamping
- ipv6: fix dst leak for uncached routes
- vrf: stop corrupting skb->csum when capturing CHECKSUM_COMPLETE
packets
Previous releases - always broken:
- packet: use ubuf_info completion for TX_RING packets
- arp: terminate device name before lookup
- ipv6: do not let ipv6_find_hdr() return an offset past the packet end
- udp: remove a disconnected socket from the 4-tuple hash table
- sctp: discard the rest of the packet on a stale-cookie error
- eth: mlx5: Bridge, fix remaining switchdev ownership gaps on merged
eswitch
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'net-7.3-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"Including fixes from Bluetooth, NFC and Netfilter.
Every week in this release is record-setting for number of posted
patches. It doesn't seem like we're creating any regressions with all
these fixes, three 'Fixes' tags here point to 7.2 commits but none are
true regression fixes. We're trying to keep the count down,
nonetheless.
Previous releases - regressions:
- net: don't require the hwtstamp NDOs when a PHY provides
timestamping
- ipv6: fix dst leak for uncached routes
- vrf: stop corrupting skb->csum when capturing CHECKSUM_COMPLETE
packets
Previous releases - always broken:
- packet: use ubuf_info completion for TX_RING packets
- arp: terminate device name before lookup
- ipv6: do not let ipv6_find_hdr() return an offset past the packet
end
- udp: remove a disconnected socket from the 4-tuple hash table
- sctp: discard the rest of the packet on a stale-cookie error
- eth: mlx5: Bridge, fix remaining switchdev ownership gaps on merged
eswitch"
[ And lots of other random network driver fixes ]
* tag 'net-7.3-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (189 commits)
tcp: prevent collapsing skbs across boundary in rtx queue
vlan: ensure sufficient headroom in vlan_dev_hard_header()
net/sched: sch_teql: fix shadowed err in __teql_resolve()
bridge: check llc_mac_hdr_init() return value in br_send_bpdu()
llc: fix skb UAF and leaks on llc_mac_hdr_init() failure
llc: reserve device headroom for allocated frames
gve: DQO: reject TSO packets with an out of range MSS
gve: fix TX drop when GSO MSS is too small for hw
gve: DQO: fix header length used by gve_can_send_tso() for UDP GSO
net: flush skb_defer_nodes in dev_cpu_dead()
net: ethernet: stmmac: dwmac-rk: fix bulk clock leak when the PHY clock fails
af_packet: fix integer overflow in prb_calc_retire_blk_tmo()
tipc: Fix a data race on mon->peer_cnt in mon_timeout()
net: phy: intel-xway: workaround 100BASE-TX Link-Up issue
net/smc: fix UAF on lgr list traversal in smcr_port_err()
net/rds: size a connection's path set by the transport it ends up with
nfp: hold IPsec RX state under the XArray lock
net: ena: fix MMIO read buffer leak on probe failure
net: ena: fix PHC cleanup on probe failure
net/sched: act_ct: fix helper UAF due to extensions realloc
...
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Merge tag 'landlock-7.3-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux
Pull Landlock fixes from Mickaël Salaün:
"This mainly fixes the Landlock tracepoint support merged this cycle so
that denial and rule events report the intended policy context,
whether through tracefs or BTF-visible callbacks.
The size of this all is mainly from propagating the corrected contract
through event definitions and producers, adding new tests for the
reported context, and updating the documentation.
Also improve annotation and fix a GCC 16 build warning"
* tag 'landlock-7.3-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux:
landlock: Widen ruleset versions to 64 bits
landlock: Add counted_by in landlock_domain
landlock: Fix tracepoint contract documentation
selftests/landlock: Test network denial context
selftests/landlock: Test filesystem denial blockers
landlock: Report the effective signal number
landlock: Report the actual ptrace tracer
landlock: Fix network denial trace context
landlock: Fix rule tracepoint context
landlock: Fix filesystem denial blocker reporting
landlock: Fix tracepoint fixed-width type names
landlock: Work around gcc-16 -Wuninitialized warning
* add selftest coverage for peer VPN address validation
* reject multicast, broadcast and loopback peer VPN addresses, which
can never identify a peer
* reject MP peers left with no usable VPN address, as they can never
be selected for TX
* reject duplicate peer VPN addresses, which made peer lookup return
an arbitrary peer
* fix stale entry left in the VPN address hashtable when an address
is cleared
* fix torn IPv6 address read on lockless TX when the unusable local
source is cleared in place
* fix torn IPv6 address read on lockless TX when a new local endpoint
is learned in place
* fix dst cache being populated with a route resolved from an already
replaced bind
* fix stale route being reused after the socket mark or UDP source
port changed
* fix bogus validation of an unspecified local source address, which
must instead be left to route source autoselection
* fix IPv6 link-local peer endpoints losing their scope id when
configured via netlink, breaking route lookup
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Merge tag 'ovpn-net-20260921' of https://github.com/OpenVPN/ovpn-net-next
Antonio Quartulli says:
====================
Included fixes:
* add selftest coverage for peer VPN address validation
* reject multicast, broadcast and loopback peer VPN addresses, which
can never identify a peer
* reject MP peers left with no usable VPN address, as they can never
be selected for TX
* reject duplicate peer VPN addresses, which made peer lookup return
an arbitrary peer
* fix stale entry left in the VPN address hashtable when an address
is cleared
* fix torn IPv6 address read on lockless TX when the unusable local
source is cleared in place
* fix torn IPv6 address read on lockless TX when a new local endpoint
is learned in place
* fix dst cache being populated with a route resolved from an already
replaced bind
* fix stale route being reused after the socket mark or UDP source
port changed
* fix bogus validation of an unspecified local source address, which
must instead be left to route source autoselection
* fix IPv6 link-local peer endpoints losing their scope id when
configured via netlink, breaking route lookup
* tag 'ovpn-net-20260921' of https://github.com/OpenVPN/ovpn-net-next:
selftests: ovpn: validate peer VPN addresses
ovpn: reject invalid peer VPN addresses
ovpn: reject multipeer peers without VPN addresses
ovpn: reject duplicate peer VPN addresses
ovpn: always unhash old VPN addresses before rehashing
ovpn: replace bind when clearing stale local source
ovpn: replace bind when learning local endpoint
ovpn: validate peer state before caching UDP dst
ovpn: track UDP socket route key for peer dst cache
ovpn: skip UDP source validation for unspecified addresses
ovpn: preserve IPv6 scope id for netlink peer endpoints
====================
Link: https://patch.msgid.link/20260921102215.3599702-1-antonio@openvpn.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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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:
- Fix bpf_skb_change_tail() to drop the checksum offload instead of
rejecting the trim of CHECKSUM_PARTIAL skbs (Daniel Borkmann)
- Add KF_PERFMON kfunc flag and require CAP_PERFMON for kfuncs that
read arbitrary memory and for untrusted read-only memory reads
(Daniel Borkmann)
- Clear scalar delta on narrowing stack spill (Daniel Borkmann)
- Set up the frame pointer for the exception callback in arm64 JIT, and
zero-fill other CPUs when BPF_F_CPU update creates a per-cpu hash
element (Donggeun Yoo)
- Various fixes (Emil Tsalapatis):
- Fix bounds check underflow for skb-backed dynptrs
- Fix rx_queue_mapping context access code generation in bpf_sock
- Reject packet pointer arguments to subprogs that may mutate the
packet
- Reject ALU instructions that see arena and non-arena operands on
different code paths
- Fix copied_seq double-counting on sockmap self-redirect
(Geliang Tang)
- Fix divide-by-zero in btf_struct_walk() on a flexible array of
zero-sized elements, fix out-of-bounds read of rtt_min in sock_ops
(Jiayuan Chen)
- Fix bpf_sock_destroy() out-of-bounds read of sk_protocol on TIME_WAIT
and request socks, and sleeping under RCU when destroying a listener
with pending children (Jiayuan Chen)
- Fix JEQ/JNE with immediate operand in MIPS32 JIT and missing zero
extension of BSWAP 16/32 in MIPS64 JIT (Johan Almbladh)
- Avoid soft lockup in htab lookup[_and_delete] batch operations on
large maps (Jose Fernandez)
- Various fixes (Kumar Kartikeya Dwivedi):
- Verify global subprogs in each sleepability context they are
called from
- Make post-verification instruction rewrites killable
- Preserve packet pointer displacement in regsafe()
- Apply CO-RE relocations before subprogram validation, restrict
CO-RE poisoning to relocatable instructions, and reject truncated
ldimm64 CO-RE relocations in libbpf
- Assign lock identity to callback map values
- Compare stack frames in regs_exact()
- Bound ownership depth through local kptrs and graph roots
- Fix u32 overflow in map batch operations when the map size exceeds
4GB (Masoud Aghasi)
- Fix UAF in bpf memalloc due to concurrent consumption of ttrace lists
in alloc_bulk() (Pu Lehui)
- Allow gotox as the terminal instruction of a program or a subprogram
(Siddharth Chintamaneni)
- Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL, skip unsettled links
in link iterator, and reject dev-bound-only programs on other devices
(Weiming Shi)
- Reject non-negative stack offsets in stack_slot_obj_get_spi()
(Xu Yunxiang)
- Check params size before reading reserved fields in
bpf_crypto_ctx_create() (Yuqi Xu)
- Reject max_entries > INT_MAX in sock_map_alloc() (Zhao Gongyi)
- Use a 32-bit compare in xsk_map_gen_lookup() (Zhiling Zou)
- Use kvfree() in xdp_test_run_teardown() (Zhixing Chen)
* tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf: (58 commits)
selftests/bpf: Test per-cpu initialization of a BPF_F_CPU created element
bpf: Zero-fill other CPUs when BPF_F_CPU creates a per-cpu hash element
bpf: Fix BSWAP 32 and 16 on MIPS64
bpf: Fix immediate JMP JEQ/JNE on MIPS32
bpf: Reject dev-bound-only programs on other devices
bpf, sockmap: Reject max_entries > INT_MAX in sock_map_alloc
selftests/bpf: Test for mixed arena/nonarena code paths
bpf: Prevent variable arena/non-arena register contents
selftests/bpf: Test rejection of pkt args to mutating subprogs
bpf: Reject pkt arguments in mutating subprogs
selftests/bpf: Add selftests for rx_queue_mapping context access
bpf: Fix bpf_sock context code generation
selftests/bpf: Test dynptr slices past end of skb
bpf: Fix bounds check for skb-backed dynptrs
selftests/bpf: Reject iterator destruction through fp+0
bpf: Reject non-negative offsets in stack_slot_obj_get_spi()
bpf: Check params size before reading reserved fields
selftests/bpf: Check local object ownership depth
bpf: Bound ownership depth through local kptrs and graph roots
selftests/bpf: Cover frame changes in bounded loops
...
The existing cpu_flag subtests always prime a key with BPF_F_ALL_CPUS
before any BPF_F_CPU write, so the create path is never covered.
Add a subtest that creates the element with BPF_F_CPU on a map with
max_entries 1, so the key can only reuse the element the previous key
released, and check that the CPUs the update did not name read back
zero. Run it for PERCPU_HASH preallocated and BPF_F_NO_PREALLOC,
whose per-cpu areas come from different allocators, and for
LRU_PERCPU_HASH.
Under BPF_F_NO_PREALLOC the reuse is only guaranteed on the cpu that
ran the delete, so pin the thread across the pair, and name a cpu other
than that one in map_flags.
Signed-off-by: Donggeun Yoo <donggeunyoo.kernel@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://patch.msgid.link/20260924102321.2120434-3-donggeunyoo.kernel@gmail.com
Mostly security fixes.
fix use-after-free in nfc_get_local_general_bytes
llcp: Fix list corruption / refcount desync in nfc_llcp_recv_dm()
llcp: Fix race condition in accept_queue lifecycle
llcp: drop truncated I/RR/RNR PDUs in nfc_llcp_recv_hdlc()
llcp: fix -ENOMEM on connect with zero-length service name
llcp: fix WKS SAP hijacking via prefix match in nfc_llcp_wks_sap()
llcp: fix sdreq TLV list leak on parse/alloc/send failure
llcp: fix slab-out-of-bounds reads when logging service names
selftests/nci: Fix out-of-bounds store on thread join
selftests: nci: Correct pthread_create return value check
selftests: nci: Fix uninitialized family ID on missing attribute
virtual_ncidev: Add missing ioctl compat handler
nfcmrvl: validate helper command length before pull
pn533: fix OOB read in pn533_acr122_is_rx_frame_valid()
port100: reject frames whose declared length exceeds the received data
st21nfca: validate ISO15693 inventory length
st21nfca: validate received frame size
trf7970a: power down on startup RX gain failure
Signed-off-by: David Heidelberg <david@ixit.cz>
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Merge tag 'nfc-7.3-rc5' of https://codeberg.org/linux-nfc/linux
David Heidelberg says:
====================
NFC fixes for net 7.3-rc5
* tag 'nfc-7.3-rc5' of https://codeberg.org/linux-nfc/linux:
nfc: pn533: fix OOB read in pn533_acr122_is_rx_frame_valid()
nfc: llcp: fix slab-out-of-bounds reads when logging service names
nfc: llcp: fix WKS SAP hijacking via prefix match in nfc_llcp_wks_sap()
nfc: llcp: fix -ENOMEM on connect with zero-length service name
nfc: st21nfca: validate ISO15693 inventory length
nfc: fix use-after-free in nfc_get_local_general_bytes
nfc: trf7970a: power down on startup RX gain failure
nfc: llcp: fix sdreq TLV list leak on parse/alloc/send failure
nfc: llcp: drop truncated I/RR/RNR PDUs in nfc_llcp_recv_hdlc()
nfc: virtual_ncidev: Add missing ioctl compat handler
selftests/nci: Fix out-of-bounds store on thread join
selftests: nci: Fix uninitialized family ID on missing attribute
nfc: llcp: Fix race condition in accept_queue lifecycle
selftests: nci: Correct pthread_create return value check
nfc: port100: reject frames whose declared length exceeds the received data
nfc: llcp: Fix list corruption / refcount desync in nfc_llcp_recv_dm()
nfc: st21nfca: validate received frame size
nfc: nfcmrvl: validate helper command length before pull
====================
Link: https://patch.msgid.link/adeaccc1-cc04-4bb9-a28a-61a61d75ba14@ixit.cz
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The NCI test collects the exit status of its helper threads by passing
the address of an int to pthread_join():
int status;
...
pthread_join(thread_t, (void **) &status);
pthread_join() stores a void pointer to the memory location. On 64-bit
systems, a void pointer is wider than an int, so the store overruns the
4 bytes of space allocated on the stack for the integer and corrupts the
adjacent stack. On our CHERI system, this caused a fault due to a
capability bounds violation.
Fix this by introducing a helper that joins a thread through a void
pointer and converts the result back to an integer, which is what the
helper threads return.
While here, also fix the logic in disconnect_tag() if the helper thread
creation failed. Previously, it would have joined a thread that was
never created when pthread_create() failed.
Fixes: f595cf1242 ("selftests: Add nci suite")
Signed-off-by: Chris Gellermann <christian.gellermann@codasip.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260904095915.3372241-1-christian.gellermann@codasip.com
Signed-off-by: David Heidelberg <david@ixit.cz>
get_family_id() walks the generic netlink CTRL_CMD_GETFAMILY reply
looking for the CTRL_ATTR_FAMILY_ID attribute and returns the parsed
value in the local variable "id". If the reply does not carry that
attribute, the parsing loop never assigns "id" and the function returns
an indeterminate stack value, which the caller stores in self->fid and
uses for subsequent netlink requests.
Initialize "id" to 0 so a missing attribute yields a deterministic
(invalid) family ID instead of a garbage value.
Fixes: f595cf1242 ("selftests: Add nci suite")
Signed-off-by: Chaithanya Lagisetty <nagachaithanya9911@gmail.com>
Reviewed-by: Hangbin Liu <liuhangbin@kylinos.cn>
Link: https://patch.msgid.link/20260901070618.3299012-1-nagachaithanya9911@gmail.com
Signed-off-by: David Heidelberg <david@ixit.cz>
The pthread_create() functions returns 0 on success and a positive value on
failure. Modify the return value check to correctly detect failure cases.
Fixes: 72696bd8a0 ("selftests: nci: Extract the start/stop discovery function")
Signed-off-by: Lei Zhu <zhulei@kylinos.cn>
Link: https://patch.msgid.link/20260729072426.303484-1-zhulei_szu@163.com
Signed-off-by: David Heidelberg <david@ixit.cz>
This reverts commit 3452eecbcc.
The test checks that the mounts of a destroyed mount namespace stay
connected. The commit that made them stay connected is reverted next
because it leaks superblocks and loop devices, so drop the test with it.
Link: https://patch.msgid.link/20260917-work-put_mnt_ns-revert-v1-1-34d9b8679e68@kernel.org
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
Add a selftest to confirm the verifier rejects ALU operations
that return arena or non-arena results depending on code path.
Signed-off-by: Emil Tsalapatis <emil@etsalapatis.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://patch.msgid.link/20260922172028.6269-9-emil@etsalapatis.com
Add a selftests that ensures that PTR_TO_PACKET arguments can
only be passed to subprogs that will never adjust the underlying
packet memory, and are rejected otherwise.
Signed-off-by: Emil Tsalapatis <emil@etsalapatis.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://patch.msgid.link/20260922172028.6269-7-emil@etsalapatis.com
Add tests to ensure the verifier properly tracks the 0 bit state
and width of the rx_queue_mapping field read from struct sock.
Signed-off-by: Emil Tsalapatis <emil@etsalapatis.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://patch.msgid.link/20260922172028.6269-5-emil@etsalapatis.com
Add a selftest to ensure dynptr slices cannot include
past the end of the linear area of an skb.
Signed-off-by: Emil Tsalapatis <emil@etsalapatis.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://patch.msgid.link/20260922172028.6269-3-emil@etsalapatis.com
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Merge tag 'hid-for-linus-2026092202' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid
Pull HID fixes from Jiri Kosina:
- new device IDs/quirks (Logitech G502X, Elecom M-XT4DRBK, Steelseries
Arctis 7, Asus Rog Z13 Folio, Lenovo Yoga Slim Gen 11)
- fixes for various code issues found by LLMs
* tag 'hid-for-linus-2026092202' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid:
selftests/hid: add unnumbered variant to the hid_bpf tests
HID: bpf: fix __hid_bpf_hw_check_params report length
selftests/hid: add define for commonly used buf size
HID: amd_sfh: Validate PCI BAR size before mapping
HID: elecom: fix bus type for M-XGL20DLBK
HID: elecom: Add support for ELECOM M-XT4DRBK (018E)
HID: corsair-void: Fix firmware event packet description
HID: i2c-hid: Add i2c-hid-quirk-bad-input-size quirk for 0911:5288 device
HID: hid-oxp: use cancel_delayed_work_sync() in remove
HID: i2c-hid: add reset quirk for Lenovo Yoga Slim 7x Gen 11 keyboard
HID: roccat: fix locking in roccat_connect() and roccat_disconnect()
HID: steelseries: Add support for Arctis 7 (2018)
HID: logitech-hidpp: Add support for G502 X Lightspeed USB mouse
HID: fix semantic patch and improve its performance
HID: alps: fix use-after-free on input2 registration failure
HID: alps: unregister DualPoint Stick input device on remove
HID: winwing: fix use-after-free in force feedback teardown
HID: multitouch: Add report ID mismatch quirk for ASUS ROG Z13 Folio
HID: wacom: fix OOB read in wacom_wac_pen_serial_enforce()
HID: quirks: add ALWAYS_POLL quirk for SDINNOVATION gaming keyboard
Five are DAMON fixes. One fixes an arm64 contpte bug where DAMON can
write past the end of a page-table page, resulting in memory corruption
and possible crashes.
Two are hugetlb fixes. One fixes an mremap() address calculation bug
which can panic x86-64.
There's also a missing anon_vma publication barrier which can result in
hung tasks, and a writeback fix to keep long cgroup writeback drains from
delaying Tasks-RCU grace periods.
The remainder are smaller fixes and maintenance changes.
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Merge tag 'mm-hotfixes-stable-2026-09-21-17-08' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM fixes from Andrew Morton:
"14 hotfixes. 10 are cc:stable. 11 are for MM.
Five DAMON fixes: one fixes an arm64 contpte bug where DAMON can write
past the end of a page-table page, resulting in memory corruption and
possible crashes.
Two hugetlb fixes: one fixes an mremap() address calculation bug which
can panic x86-64.
There's also a missing anon_vma publication barrier which can result
in hung tasks, and a writeback fix to keep long cgroup writeback
drains from delaying Tasks-RCU grace periods.
The remainder are smaller fixes and maintenance changes"
* tag 'mm-hotfixes-stable-2026-09-21-17-08' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
MAINTAINERS: update Xu Xin's email
writeback: report a Tasks-RCU quiescent state per cgwb drain pass
mm/damon/core: reset invalid quota->charge_target_from
MAINTAINERS: add Baoquan and Baolin as MGLRU reviewers
mm/rmap: fix missing barrier between anon_vma init and vma->anon_vma publish
mm/hugetlb: preserve mremap address delta when skipping page tables
mm/damon/core: fix unconditionally skip last region
mm/damon/vaddr: avoid hw-driven pte updates during damon_hugetlb_mkold()
mm/damon/core: allow esz to be set to zero
mm/damon/ops-common: use a page-aligned address in damon_ptep_mkold()
ocfs2: make ocfs2_calc_xattr_init() return void
mailmap: update Haowen Bai's email address
selftests/cgroup: account for zswap shrinker writeback
mm/hugetlb: do not dissolve gigantic pages without runtime support
Commit 8d75c338f0 ("sysctl: remove CONFIG_PROC_SYSCTL, it just mirrors
CONFIG_SYSCTL") renamed CONFIG_PROC_SYSCTL to CONFIG_SYSCTL in place,
which left the entry out of alphabetical order in the net and
packetdrill configs. The netdev CI check for sorted selftest configs
now fails for every patch that touches either file.
Fixes: 8d75c338f0 ("sysctl: remove CONFIG_PROC_SYSCTL, it just mirrors CONFIG_SYSCTL")
Signed-off-by: Yuya Kusakabe <yuya.kusakabe@gmail.com>
Reviewed-by: Joel Granados <joel.granados@kernel.org>
Link: https://patch.msgid.link/20260918-selftests-net-config-sort-v1-1-968ea6e8c1b7@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Add a verifier regression test that initializes a numeric iterator at fp-8
and attempts to destroy it through fp+0. The verifier must reject the
non-negative offset instead of treating it as the initialized stack slot.
Check the offset diagnostic to ensure rejection happens at the stack
object address check. The numeric iterator destroy operation is a no-op;
this test checks verifier rejection and does not run the program.
Signed-off-by: Xu Yunxiang <xyx2021@mail.ustc.edu.cn>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Sun Jian <sun.jian.kdev@gmail.com>
Link: https://lore.kernel.org/bpf/20260920210423.345636-3-xyx2021@mail.ustc.edu.cn
- Synchronize hrtimer during VCPU teardown
- Fix the conversion between vsip and hvip values
- Serialize IMSIC attributes with vCPU migration
- Release unused page after MMU invalidation
- Propagate interrupted G-stage faults to KVM user-space
- Fix NACL hfence entry update order
- Fix sdata leak and stale snapshot_addr in snapshot_set_shmem
- Preserve firmware counter value across PMU counter stop/start
- Report PMU snapshot write failure to the guest
- Fix perf-backed counter accounting across PMU stop and read
- Fix HSM hart status error propagation
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Merge tag 'kvm-riscv-fixes-7.3-1' of https://github.com/kvm-riscv/linux into HEAD
KVM/riscv fixes for 7.3, take #1
- Synchronize hrtimer during VCPU teardown
- Fix the conversion between vsip and hvip values
- Serialize IMSIC attributes with vCPU migration
- Release unused page after MMU invalidation
- Propagate interrupted G-stage faults to KVM user-space
- Fix NACL hfence entry update order
- Fix sdata leak and stale snapshot_addr in snapshot_set_shmem
- Preserve firmware counter value across PMU counter stop/start
- Report PMU snapshot write failure to the guest
- Fix perf-backed counter accounting across PMU stop and read
- Fix HSM hart status error propagation
Commit 166b476b8d (selftests/ublk: add shared memory zero-copy
support in kublk, 2026-03-31) introduced a write(2), ignoring its
return value and thus causing an error, when building.
Fix this by using the common workaround "(void)!" to trick the
compiler the result is being used.
Signed-off-by: Dirk Gouders <dirk@gouders.net>
Reviewed-by: Ming Lei <tom.leiming@gmail.com>
Link: https://patch.msgid.link/20260914110145.41627-2-dirk@gouders.net
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Exercise peer VPN address validation through both peer creation and
update. Check missing, unspecified, duplicate, multicast, broadcast,
loopback, IPv4-compatible and IPv4-mapped addresses.
Temporarily configure a peer with both address families to verify that
either family can be cleared while the other remains configured, then
restore the original addresses before running the existing traffic
tests.
Extend ovpn-cli peer updates with an optional VPN address and preserve
peer creation errors so the negative tests can observe rejected netlink
requests.
Signed-off-by: Ralf Lici <ralf@mandelbit.com>
Signed-off-by: Antonio Quartulli <antonio@openvpn.net>
- Reject the loading of a potentially problematic microcode version
on Intel Granite Rapids systems (Chang S. Bae)
- On FRED, reconstruct the proper #GP context for rejected INT
instructions, to fix a signal ABI regression (Matthew Schwartz)
- Add a test for this signal ABI regression the x86
self-test suite (Matthew Schwartz)
- Don't emit the new and not yet properly supported EGPR instructions
(%r16-%r31) on CONFIG_X86_NATIVE_CPU=y builds (Chang S. Bae)
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'x86-urgent-2026-09-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
- Reject the loading of a potentially problematic microcode version
on Intel Granite Rapids systems (Chang S. Bae)
- On FRED, reconstruct the proper #GP context for rejected INT
instructions, to fix a signal ABI regression (Matthew Schwartz)
- Add a test for this signal ABI regression the x86
self-test suite (Matthew Schwartz)
- Don't emit the new and not yet properly supported EGPR instructions
(%r16-%r31) on CONFIG_X86_NATIVE_CPU=y builds (Chang S. Bae)
* tag 'x86-urgent-2026-09-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/build/64: Prevent native builds from generating EGPR use
selftests/x86: Check signal state for rejected software interrupts
x86/fred: Reconstruct the #GP context for rejected INT instructions
x86/microcode/intel: Reject problematic loading on Granite Rapids systems
present, but development headers (binutils-dev) are not
(Ulises Mendez Martinez)
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'objtool-urgent-2026-09-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull objtool fix from Ingo Molnar:
- Fix objtool build error on systems where libopcodes is
present, but development headers (binutils-dev) are not
(Ulises Mendez Martinez)
* tag 'objtool-urgent-2026-09-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
objtool: Validate disassembler headers in libopcodes probe
