time/namespace: Validate nanosecond field in proc_timens_set_offset()
In the Linux kernel, the following vulnerability has been resolved:
time/namespace: Validate nanosecond field in proc_timens_set_offset()
The function validates tv_sec to be within [-KTIME_SEC_MAX, KTIME_SEC_MAX]
but never validates that tv_nsec is within the valid range of
[0, NSEC_PER_SEC-1] before using it in timespec64_add().
timespec64_add() expects both timespec64 structures to have normalized
values with tv_nsec in the range [0, 999999999]. If off->val.tv_nsec
contains invalid values (negative or >= NSEC_PER_SEC), it could lead to
incorrect calculations or unexpected behavior.
Add validation to ensure tv_nsec is within the valid ra
clk: qcom: gdsc: tear down per-domain genpds in gdsc_unregister()
In the Linux kernel, the following vulnerability has been resolved:
clk: qcom: gdsc: tear down per-domain genpds in gdsc_unregister()
gdsc_unregister() removes the OF provider entry and tears down the
parent/subdomain wiring, but never calls pm_genpd_remove() on the
individual generic_pm_domain structures registered by gdsc_init():
void gdsc_unregister(struct gdsc_desc *desc)
{
struct device *dev = desc->dev;
size_t num = desc->num;
gdsc_pm_subdomain_remove(desc, num);
of_genpd_del_provider(dev->of_node);
}
That leaves dangling entries on the global gpd_list. After a provider
unbind/rebind cycle (deferred-probe replay during e
In the Linux kernel, the following vulnerability has been resolved:
bpf: Reject writes through untrusted BTF pointers
check_ptr_to_btf_access() lets program-type btf_struct_access callbacks
validate writes before the default BTF access path rejects non-read
accesses. That bypasses the read-only policy for untrusted BTF pointers
created by helpers such as bpf_rdonly_cast().
Reject non-read accesses through PTR_UNTRUSTED BTF pointers at the
common entry point, before the callback branch to handle all cases.
staging: media: ipu7: fix pm_runtime refcount leak in ipu7_resume()
In the Linux kernel, the following vulnerability has been resolved:
staging: media: ipu7: fix pm_runtime refcount leak in ipu7_resume()
ipu7_resume() calls pm_runtime_get_sync() before resuming the device.
If the runtime PM resume fails, the usage count remains incremented, but
the error path returns without dropping the reference.
Use pm_runtime_resume_and_get() instead, which balances the usage count
on failure and avoids the leak. Keep returning 0 on error, as resume
callbacks should not propagate failures to the PM core, matching the
behaviour of the ipu6 driver.
thermal/drivers/rcar: Fix error checking in probe()
In the Linux kernel, the following vulnerability has been resolved:
thermal/drivers/rcar: Fix error checking in probe()
This code accidentally calls thermal_zone_device_enable() before checking
whether thermal_zone_device_register_with_trips() failed. Move the call
until later to avoid an error pointer dereference of "priv->zone".
The driver works differently depending on if we are using OF thermal or
not. We use thermal_add_hwmon_sysfs() if we are using OF thermal and
call thermal_zone_device_enable() if not. We can share same error check
for if either of these fail.
Moving the thermal_zone_device_enable() call is a bit cleaner as wel
usb: gadget: r8a66597: avoid double free of ep0_req in probe error path
In the Linux kernel, the following vulnerability has been resolved:
usb: gadget: r8a66597: avoid double free of ep0_req in probe error path
If usb_add_gadget_udc() fails, r8a66597_probe() jumps to err_add_udc
and frees ep0_req, then falls through to clean_up2 where ep0_req is
freed again when it is non-NULL.
Remove the redundant free from err_add_udc and keep the cleanup in
clean_up2 so the request is released exactly once.
Issue found using a prototype static analysis tool
and confirmed by code review.
udf: Mark LVID buffer as uptodate before marking it dirty
In the Linux kernel, the following vulnerability has been resolved:
udf: Mark LVID buffer as uptodate before marking it dirty
When an I/O error occurs while writing the Logical Volume Integrity
Descriptor (LVID) buffer to the block device, the block layer's completion
handler (`end_buffer_write_sync()`) clears the `BH_Uptodate` flag on the
buffer. However, the buffer still contains valid LVID data in memory. If
the filesystem is subsequently remounted read-write or synced,
`udf_open_lvid()` or `udf_sync_fs()` will modify the LVID buffer and call
`mark_buffer_dirty()`. This triggers a spurious
`WARN_ON_ONCE(!buffer_uptodate(bh))` warning in
bpf: Fix vmlinux BTF prep race in bpf_get_btf_vmlinux
In the Linux kernel, the following vulnerability has been resolved:
bpf: Fix vmlinux BTF prep race in bpf_get_btf_vmlinux
bpf_get_btf_vmlinux() lazily parses the vmlinux BTF under the
bpf_verifier_lock, but publishes the result through a plain store
and re-checks it through a plain lockless load. Nothing orders
the stores initializing the struct btf inside btf_parse_vmlinux()
against the store publishing the pointer: On a weakly ordered
arch, a concurrent first-time caller taking the lockless fast
path could in principle observe the pointer before the parsed
contents are visible. The mutex_unlock() does not help such a
reader given it only
bpf: Fix use-after-free on mm_struct in bpf_find_vma()
In the Linux kernel, the following vulnerability has been resolved:
bpf: Fix use-after-free on mm_struct in bpf_find_vma()
bpf_find_vma() reads task->mm and calls mmap_read_trylock(mm) without
holding a reference on the mm. On a foreign task, a concurrent exit_mm()
can free the mm_struct between the lockless read and the trylock,
resulting in a use-after-free. mm_struct is not SLAB_TYPESAFE_BY_RCU.
For the current task, task->mm is stable. For a foreign task, pin the mm
under task->alloc_lock and release it with mmput_async(), mirroring commit
d8e27d2d22b6 ("bpf: fix mm lifecycle in open-coded task_vma iterator").
Use spin_trylock() instea
bus: mhi: ep: Fix device refcount leak in the error path of MHI device creation
In the Linux kernel, the following vulnerability has been resolved:
bus: mhi: ep: Fix device refcount leak in the error path of MHI device creation
mhi_ep_create_device() takes one device reference for the UL channel and
another for the DL channel after allocating the transfer device. These
references are normally released by mhi_ep_destroy_device() before the
device itself is removed.
If dev_set_name() or device_add() fails, the error path currently drops
only one reference. The remaining channel references keep the device
from being released and leave the channels associated with a device that
was never registered.
Route both failures t
bpf: Reject programs with inlined helpers if JIT is not available
In the Linux kernel, the following vulnerability has been resolved:
bpf: Reject programs with inlined helpers if JIT is not available
When an architecture (such as LoongArch, ARM64, and RISC-V) implements
bpf_jit_inlines_helper_call(), the verifier skips rewriting the helper
call offset (insn->imm) in bpf_do_misc_fixups(). This is because the
helper is expected to be inlined by the JIT compiler later. Therefore,
insn->imm remains as the raw helper enum ID.
However, if JIT is disabled at runtime (net.core.bpf_jit_enable=0) or
if JIT compilation fails dynamically (e.g., due to OOM), the program
falls back to the BPF interpreter.
When the in
In the Linux kernel, the following vulnerability has been resolved:
printk: Fix possible console use-after-free
When emitting a record via legacy printing, it is possible that a handover
to another legacy printing context occurs. When a context has performed a
handover, the console SRCU read lock is released and the pointer to the
console struct might now be invalid. Therefore, after calling
nbcon_legacy_emit_next_record() or console_emit_next_record(), it is
necessary to check if a handover occurred _before_ further @con usage.
Sashiko pointed out that console_flush_one_record() was not doing this.
In console_flush_one_record(), after em
ACPI: RISC-V: Check acpi_get_handle() status in riscv_acpi_add_prt_dep()
In the Linux kernel, the following vulnerability has been resolved:
ACPI: RISC-V: Check acpi_get_handle() status in riscv_acpi_add_prt_dep()
In riscv_acpi_add_prt_dep(), the acpi_get_handle() call can fail which
would leave link_handle uninitialized.
Fix it by checking the acpi_get_handle() return status and skip the entry
if it fails.
In the Linux kernel, the following vulnerability has been resolved:
ACPI: RISC-V: Fix riscv_acpi_add_prt_dep() loop handling
The loop in riscv_acpi_add_prt_dep() includes error conditions that are
handled in a dubious - if not outright wrong - way, by continuining the
loop (which skips and misses the entry pointer update to point to the next
entry).
Rewrite the loop as a for loop (that handles the continuation correctly)
and wrap the condition and update statements using helper functions to make
it cleaner.
In the Linux kernel, the following vulnerability has been resolved:
platform/x86: dell-privacy: Fix race condition
Accessing priv->features_present needs to happen with the list mutex
being held, otherwise priv can be freed at any moment.
platform/x86: dell-wmi-base: Fix resource leak on module load failure
In the Linux kernel, the following vulnerability has been resolved:
platform/x86: dell-wmi-base: Fix resource leak on module load failure
We need to properly clean up the SMBIOS request and the privacy driver
when the module load fails.
platform/x86: dell-wmi-base: Fix handling of ultra performance key
In the Linux kernel, the following vulnerability has been resolved:
platform/x86: dell-wmi-base: Fix handling of ultra performance key
The commit message of commit 5fbd827eb9c2 ("platform/x86: dell-wmi: Recognise or support new switches")
states that the ultra performance key contains additional data
after the type and code fields. The event data passed to
dell_wmi_process_key() is already parsed, so "buffer" already
starts after those two fields.
Use the correct index for accessing the first data field to avoid
a potential buffer overread.
platform/x86: lg-laptop: Fix LED resource handling
In the Linux kernel, the following vulnerability has been resolved:
platform/x86: lg-laptop: Fix LED resource handling
The event notification callback might access kbd_backlight even
when it was not successfully registered with the LED subsystem.
The same happens inside acpi_remove(), where the LED devices are
unregistered unconditionally.
Fix this by tracking the availability of the kbd_backlight LED
device and use devm_led_classdev_register() to let devres take
care of unregistering the LED devices during removal. For this
the parent device of the LED devices is changed to the native
platform device.
bpf: Drop scalar id on sign-extending narrowing stack fills
In the Linux kernel, the following vulnerability has been resolved:
bpf: Drop scalar id on sign-extending narrowing stack fills
When a spilled scalar is filled back with a sign-extending narrowing load
(BPF_MEMSX), check_stack_read_fixed_off() copies the spilled register
including its scalar id, but coerce_reg_to_size_sx() then sign-extends the
filled register's value. If the same slot is also filled with a plain
zero-extending load (BPF_MEM), both destination registers share the id yet
hold different values. A later 'if <zext-reg> == const' then refines the
sign-extended register through sync_linked_regs() to a value it does not
have at ru
remoteproc: qcom_q6v5_adsp: Fix reference leak for device node
In the Linux kernel, the following vulnerability has been resolved:
remoteproc: qcom_q6v5_adsp: Fix reference leak for device node
When calling of_parse_phandle_with_args(), the caller is responsible
to call of_node_put() to release the reference of device node.
In adsp_map_carveout, it does not release the reference.