| CVE |
Vendors |
Products |
Updated |
CVSS v3.1 |
| In the Linux kernel, the following vulnerability has been resolved:
net: usb: lan78xx: Fix lost EEPROM read timeout error(-ETIMEDOUT) in lan78xx_read_raw_eeprom
Syzbot reported read of uninitialized variable BUG with following call stack.
lan78xx 8-1:1.0 (unnamed net_device) (uninitialized): EEPROM read operation timeout
=====================================================
BUG: KMSAN: uninit-value in lan78xx_read_eeprom drivers/net/usb/lan78xx.c:1095 [inline]
BUG: KMSAN: uninit-value in lan78xx_init_mac_address drivers/net/usb/lan78xx.c:1937 [inline]
BUG: KMSAN: uninit-value in lan78xx_reset+0x999/0x2cd0 drivers/net/usb/lan78xx.c:3241
lan78xx_read_eeprom drivers/net/usb/lan78xx.c:1095 [inline]
lan78xx_init_mac_address drivers/net/usb/lan78xx.c:1937 [inline]
lan78xx_reset+0x999/0x2cd0 drivers/net/usb/lan78xx.c:3241
lan78xx_bind+0x711/0x1690 drivers/net/usb/lan78xx.c:3766
lan78xx_probe+0x225c/0x3310 drivers/net/usb/lan78xx.c:4707
Local variable sig.i.i created at:
lan78xx_read_eeprom drivers/net/usb/lan78xx.c:1092 [inline]
lan78xx_init_mac_address drivers/net/usb/lan78xx.c:1937 [inline]
lan78xx_reset+0x77e/0x2cd0 drivers/net/usb/lan78xx.c:3241
lan78xx_bind+0x711/0x1690 drivers/net/usb/lan78xx.c:3766
The function lan78xx_read_raw_eeprom failed to properly propagate EEPROM
read timeout errors (-ETIMEDOUT). In the fallthrough path, it first
attempted to restore the pin configuration for LED outputs and then
returned only the status of that restore operation, discarding the
original timeout error.
As a result, callers could mistakenly treat the data buffer as valid
even though the EEPROM read had actually timed out with no data or partial
data.
To fix this, handle errors in restoring the LED pin configuration separately.
If the restore succeeds, return any prior EEPROM timeout error correctly
to the caller. |
| In the Linux kernel, the following vulnerability has been resolved:
ice: ice_adapter: release xa entry on adapter allocation failure
When ice_adapter_new() fails, the reserved XArray entry created by
xa_insert() is not released. This causes subsequent insertions at
the same index to return -EBUSY, potentially leading to
NULL pointer dereferences.
Reorder the operations as suggested by Przemek Kitszel:
1. Check if adapter already exists (xa_load)
2. Reserve the XArray slot (xa_reserve)
3. Allocate the adapter (ice_adapter_new)
4. Store the adapter (xa_store) |
| In the Linux kernel, the following vulnerability has been resolved:
KVM: arm64: Fix debug checking for np-guests using huge mappings
When running with transparent huge pages and CONFIG_NVHE_EL2_DEBUG then
the debug checking in assert_host_shared_guest() fails on the launch of an
np-guest. This WARN_ON() causes a panic and generates the stack below.
In __pkvm_host_relax_perms_guest() the debug checking assumes the mapping
is a single page but it may be a block map. Update the checking so that
the size is not checked and just assumes the correct size.
While we're here make the same fix in __pkvm_host_mkyoung_guest().
Info: # lkvm run -k /share/arch/arm64/boot/Image -m 704 -c 8 --name guest-128
Info: Removed ghost socket file "/.lkvm//guest-128.sock".
[ 1406.521757] kvm [141]: nVHE hyp BUG at: arch/arm64/kvm/hyp/nvhe/mem_protect.c:1088!
[ 1406.521804] kvm [141]: nVHE call trace:
[ 1406.521828] kvm [141]: [<ffff8000811676b4>] __kvm_nvhe_hyp_panic+0xb4/0xe8
[ 1406.521946] kvm [141]: [<ffff80008116d12c>] __kvm_nvhe_assert_host_shared_guest+0xb0/0x10c
[ 1406.522049] kvm [141]: [<ffff80008116f068>] __kvm_nvhe___pkvm_host_relax_perms_guest+0x48/0x104
[ 1406.522157] kvm [141]: [<ffff800081169df8>] __kvm_nvhe_handle___pkvm_host_relax_perms_guest+0x64/0x7c
[ 1406.522250] kvm [141]: [<ffff800081169f0c>] __kvm_nvhe_handle_trap+0x8c/0x1a8
[ 1406.522333] kvm [141]: [<ffff8000811680fc>] __kvm_nvhe___skip_pauth_save+0x4/0x4
[ 1406.522454] kvm [141]: ---[ end nVHE call trace ]---
[ 1406.522477] kvm [141]: Hyp Offset: 0xfffece8013600000
[ 1406.522554] Kernel panic - not syncing: HYP panic:
[ 1406.522554] PS:834003c9 PC:0000b1806db6d170 ESR:00000000f2000800
[ 1406.522554] FAR:ffff8000804be420 HPFAR:0000000000804be0 PAR:0000000000000000
[ 1406.522554] VCPU:0000000000000000
[ 1406.523337] CPU: 3 UID: 0 PID: 141 Comm: kvm-vcpu-0 Not tainted 6.16.0-rc7 #97 PREEMPT
[ 1406.523485] Hardware name: FVP Base RevC (DT)
[ 1406.523566] Call trace:
[ 1406.523629] show_stack+0x18/0x24 (C)
[ 1406.523753] dump_stack_lvl+0xd4/0x108
[ 1406.523899] dump_stack+0x18/0x24
[ 1406.524040] panic+0x3d8/0x448
[ 1406.524184] nvhe_hyp_panic_handler+0x10c/0x23c
[ 1406.524325] kvm_handle_guest_abort+0x68c/0x109c
[ 1406.524500] handle_exit+0x60/0x17c
[ 1406.524630] kvm_arch_vcpu_ioctl_run+0x2e0/0x8c0
[ 1406.524794] kvm_vcpu_ioctl+0x1a8/0x9cc
[ 1406.524919] __arm64_sys_ioctl+0xac/0x104
[ 1406.525067] invoke_syscall+0x48/0x10c
[ 1406.525189] el0_svc_common.constprop.0+0x40/0xe0
[ 1406.525322] do_el0_svc+0x1c/0x28
[ 1406.525441] el0_svc+0x38/0x120
[ 1406.525588] el0t_64_sync_handler+0x10c/0x138
[ 1406.525750] el0t_64_sync+0x1ac/0x1b0
[ 1406.525876] SMP: stopping secondary CPUs
[ 1406.525965] Kernel Offset: disabled
[ 1406.526032] CPU features: 0x0000,00000080,8e134ca1,9446773f
[ 1406.526130] Memory Limit: none
[ 1406.959099] ---[ end Kernel panic - not syncing: HYP panic:
[ 1406.959099] PS:834003c9 PC:0000b1806db6d170 ESR:00000000f2000800
[ 1406.959099] FAR:ffff8000804be420 HPFAR:0000000000804be0 PAR:0000000000000000
[ 1406.959099] VCPU:0000000000000000 ] |
| In the Linux kernel, the following vulnerability has been resolved:
drm/msm: Fix pgtable prealloc error path
The following splat was reported:
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010
Mem abort info:
ESR = 0x0000000096000004
EC = 0x25: DABT (current EL), IL = 32 bits
SET = 0, FnV = 0
EA = 0, S1PTW = 0
FSC = 0x04: level 0 translation fault
Data abort info:
ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
CM = 0, WnR = 0, TnD = 0, TagAccess = 0
GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
user pgtable: 4k pages, 48-bit VAs, pgdp=00000008d0fd8000
[0000000000000010] pgd=0000000000000000, p4d=0000000000000000
Internal error: Oops: 0000000096000004 [#1] SMP
CPU: 5 UID: 1000 PID: 149076 Comm: Xwayland Tainted: G S 6.16.0-rc2-00809-g0b6974bb4134-dirty #367 PREEMPT
Tainted: [S]=CPU_OUT_OF_SPEC
Hardware name: Qualcomm Technologies, Inc. SM8650 HDK (DT)
pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : build_detached_freelist+0x28/0x224
lr : kmem_cache_free_bulk.part.0+0x38/0x244
sp : ffff000a508c7a20
x29: ffff000a508c7a20 x28: ffff000a508c7d50 x27: ffffc4e49d16f350
x26: 0000000000000058 x25: 00000000fffffffc x24: 0000000000000000
x23: ffff00098c4e1450 x22: 00000000fffffffc x21: 0000000000000000
x20: ffff000a508c7af8 x19: 0000000000000002 x18: 00000000000003e8
x17: ffff000809523850 x16: ffff000809523820 x15: 0000000000401640
x14: ffff000809371140 x13: 0000000000000130 x12: ffff0008b5711e30
x11: 00000000001058fa x10: 0000000000000a80 x9 : ffff000a508c7940
x8 : ffff000809371ba0 x7 : 781fffe033087fff x6 : 0000000000000000
x5 : ffff0008003cd000 x4 : 781fffe033083fff x3 : ffff000a508c7af8
x2 : fffffdffc0000000 x1 : 0001000000000000 x0 : ffff0008001a6a00
Call trace:
build_detached_freelist+0x28/0x224 (P)
kmem_cache_free_bulk.part.0+0x38/0x244
kmem_cache_free_bulk+0x10/0x1c
msm_iommu_pagetable_prealloc_cleanup+0x3c/0xd0
msm_vma_job_free+0x30/0x240
msm_ioctl_vm_bind+0x1d0/0x9a0
drm_ioctl_kernel+0x84/0x104
drm_ioctl+0x358/0x4d4
__arm64_sys_ioctl+0x8c/0xe0
invoke_syscall+0x44/0x100
el0_svc_common.constprop.0+0x3c/0xe0
do_el0_svc+0x18/0x20
el0_svc+0x30/0x100
el0t_64_sync_handler+0x104/0x130
el0t_64_sync+0x170/0x174
Code: aa0203f5 b26287e2 f2dfbfe2 aa0303f4 (f8737ab6)
---[ end trace 0000000000000000 ]---
Since msm_vma_job_free() is called directly from the ioctl, this looks
like an error path cleanup issue. Which I think results from
prealloc_cleanup() called without a preceding successful
prealloc_allocate() call. So handle that case better.
Patchwork: https://patchwork.freedesktop.org/patch/678677/ |
| In the Linux kernel, the following vulnerability has been resolved:
ALSA: pcm: Disable bottom softirqs as part of spin_lock_irq() on PREEMPT_RT
snd_pcm_group_lock_irq() acquires a spinlock_t and disables interrupts
via spin_lock_irq(). This also implicitly disables the handling of
softirqs such as TIMER_SOFTIRQ.
On PREEMPT_RT softirqs are preemptible and spin_lock_irq() does not
disable them. That means a timer can be invoked during spin_lock_irq()
on the same CPU. Due to synchronisations reasons local_bh_disable() has
a per-CPU lock named softirq_ctrl.lock which synchronizes individual
softirq against each other.
syz-bot managed to trigger a lockdep report where softirq_ctrl.lock is
acquired in hrtimer_cancel() in addition to hrtimer_run_softirq(). This
is a possible deadlock.
The softirq_ctrl.lock can not be made part of spin_lock_irq() as this
would lead to too much synchronisation against individual threads on the
system. To avoid the possible deadlock, softirqs must be manually
disabled before the lock is acquired.
Disable softirqs before the lock is acquired on PREEMPT_RT. |
| In the Linux kernel, the following vulnerability has been resolved:
bpf: dont report verifier bug for missing bpf_scc_visit on speculative path
Syzbot generated a program that triggers a verifier_bug() call in
maybe_exit_scc(). maybe_exit_scc() assumes that, when called for a
state with insn_idx in some SCC, there should be an instance of struct
bpf_scc_visit allocated for that SCC. Turns out the assumption does
not hold for speculative execution paths. See example in the next
patch.
maybe_scc_exit() is called from update_branch_counts() for states that
reach branch count of zero, meaning that path exploration for a
particular path is finished. Path exploration can finish in one of
three ways:
a. Verification error is found. In this case, update_branch_counts()
is called only for non-speculative paths.
b. Top level BPF_EXIT is reached. Such instructions are never a part of
an SCC, so compute_scc_callchain() in maybe_scc_exit() will return
false, and maybe_scc_exit() will return early.
c. A checkpoint is reached and matched. Checkpoints are created by
is_state_visited(), which calls maybe_enter_scc(), which allocates
bpf_scc_visit instances for checkpoints within SCCs.
Hence, for non-speculative symbolic execution paths, the assumption
still holds: if maybe_scc_exit() is called for a state within an SCC,
bpf_scc_visit instance must exist.
This patch removes the verifier_bug() call for speculative paths. |
| In the Linux kernel, the following vulnerability has been resolved:
blk-mq: fix potential deadlock while nr_requests grown
Allocate and free sched_tags while queue is freezed can deadlock[1],
this is a long term problem, hence allocate memory before freezing
queue and free memory after queue is unfreezed.
[1] https://lore.kernel.org/all/0659ea8d-a463-47c8-9180-43c719e106eb@linux.ibm.com/ |
| In the Linux kernel, the following vulnerability has been resolved:
blk-throttle: fix access race during throttle policy activation
On repeated cold boots we occasionally hit a NULL pointer crash in
blk_should_throtl() when throttling is consulted before the throttle
policy is fully enabled for the queue. Checking only q->td != NULL is
insufficient during early initialization, so blkg_to_pd() for the
throttle policy can still return NULL and blkg_to_tg() becomes NULL,
which later gets dereferenced.
Unable to handle kernel NULL pointer dereference
at virtual address 0000000000000156
...
pc : submit_bio_noacct+0x14c/0x4c8
lr : submit_bio_noacct+0x48/0x4c8
sp : ffff800087f0b690
x29: ffff800087f0b690 x28: 0000000000005f90 x27: ffff00068af393c0
x26: 0000000000080000 x25: 000000000002fbc0 x24: ffff000684ddcc70
x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000
x20: 0000000000080000 x19: ffff000684ddcd08 x18: ffffffffffffffff
x17: 0000000000000000 x16: ffff80008132a550 x15: 0000ffff98020fff
x14: 0000000000000000 x13: 1fffe000d11d7021 x12: ffff000688eb810c
x11: ffff00077ec4bb80 x10: ffff000688dcb720 x9 : ffff80008068ef60
x8 : 00000a6fb8a86e85 x7 : 000000000000111e x6 : 0000000000000002
x5 : 0000000000000246 x4 : 0000000000015cff x3 : 0000000000394500
x2 : ffff000682e35e40 x1 : 0000000000364940 x0 : 000000000000001a
Call trace:
submit_bio_noacct+0x14c/0x4c8
verity_map+0x178/0x2c8
__map_bio+0x228/0x250
dm_submit_bio+0x1c4/0x678
__submit_bio+0x170/0x230
submit_bio_noacct_nocheck+0x16c/0x388
submit_bio_noacct+0x16c/0x4c8
submit_bio+0xb4/0x210
f2fs_submit_read_bio+0x4c/0xf0
f2fs_mpage_readpages+0x3b0/0x5f0
f2fs_readahead+0x90/0xe8
Tighten blk_throtl_activated() to also require that the throttle policy
bit is set on the queue:
return q->td != NULL &&
test_bit(blkcg_policy_throtl.plid, q->blkcg_pols);
This prevents blk_should_throtl() from accessing throttle group state
until policy data has been attached to blkgs. |
| In the Linux kernel, the following vulnerability has been resolved:
iommufd: Don't overflow during division for dirty tracking
If pgshift is 63 then BITS_PER_TYPE(*bitmap->bitmap) * pgsize will overflow
to 0 and this triggers divide by 0.
In this case the index should just be 0, so reorganize things to divide
by shift and avoid hitting any overflows. |
| In the Linux kernel, the following vulnerability has been resolved:
jfs: Verify inode mode when loading from disk
The inode mode loaded from corrupted disk can be invalid. Do like what
commit 0a9e74051313 ("isofs: Verify inode mode when loading from disk")
does. |
| In the Linux kernel, the following vulnerability has been resolved:
drm/amd/display: Add NULL pointer checks in dc_stream cursor attribute functions
The function dc_stream_set_cursor_attributes() currently dereferences
the `stream` pointer and nested members `stream->ctx->dc->current_state`
without checking for NULL.
All callers of these functions, such as in
`dcn30_apply_idle_power_optimizations()` and
`amdgpu_dm_plane_handle_cursor_update()`, already perform NULL checks
before calling these functions.
Fixes below:
drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c:336 dc_stream_program_cursor_attributes()
error: we previously assumed 'stream' could be null (see line 334)
drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c
327 bool dc_stream_program_cursor_attributes(
328 struct dc_stream_state *stream,
329 const struct dc_cursor_attributes *attributes)
330 {
331 struct dc *dc;
332 bool reset_idle_optimizations = false;
333
334 dc = stream ? stream->ctx->dc : NULL;
^^^^^^
The old code assumed stream could be NULL.
335
--> 336 if (dc_stream_set_cursor_attributes(stream, attributes)) {
^^^^^^
The refactor added an unchecked dereference.
drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c
313 bool dc_stream_set_cursor_attributes(
314 struct dc_stream_state *stream,
315 const struct dc_cursor_attributes *attributes)
316 {
317 bool result = false;
318
319 if (dc_stream_check_cursor_attributes(stream, stream->ctx->dc->current_state, attributes)) {
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Here.
This function used to check for if stream as NULL and return false at
the start. Probably we should add that back. |
| In the Linux kernel, the following vulnerability has been resolved:
pid: Add a judgment for ns null in pid_nr_ns
__task_pid_nr_ns
ns = task_active_pid_ns(current);
pid_nr_ns(rcu_dereference(*task_pid_ptr(task, type)), ns);
if (pid && ns->level <= pid->level) {
Sometimes null is returned for task_active_pid_ns. Then it will trigger kernel panic in pid_nr_ns.
For example:
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000058
Mem abort info:
ESR = 0x0000000096000007
EC = 0x25: DABT (current EL), IL = 32 bits
SET = 0, FnV = 0
EA = 0, S1PTW = 0
FSC = 0x07: level 3 translation fault
Data abort info:
ISV = 0, ISS = 0x00000007, ISS2 = 0x00000000
CM = 0, WnR = 0, TnD = 0, TagAccess = 0
GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
user pgtable: 4k pages, 39-bit VAs, pgdp=00000002175aa000
[0000000000000058] pgd=08000002175ab003, p4d=08000002175ab003, pud=08000002175ab003, pmd=08000002175be003, pte=0000000000000000
pstate: 834000c5 (Nzcv daIF +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : __task_pid_nr_ns+0x74/0xd0
lr : __task_pid_nr_ns+0x24/0xd0
sp : ffffffc08001bd10
x29: ffffffc08001bd10 x28: ffffffd4422b2000 x27: 0000000000000001
x26: ffffffd442821168 x25: ffffffd442821000 x24: 00000f89492eab31
x23: 00000000000000c0 x22: ffffff806f5693c0 x21: ffffff806f5693c0
x20: 0000000000000001 x19: 0000000000000000 x18: 0000000000000000
x17: 00000000529c6ef0 x16: 00000000529c6ef0 x15: 00000000023a1adc
x14: 0000000000000003 x13: 00000000007ef6d8 x12: 001167c391c78800
x11: 00ffffffffffffff x10: 0000000000000000 x9 : 0000000000000001
x8 : ffffff80816fa3c0 x7 : 0000000000000000 x6 : 49534d702d535449
x5 : ffffffc080c4c2c0 x4 : ffffffd43ee128c8 x3 : ffffffd43ee124dc
x2 : 0000000000000000 x1 : 0000000000000001 x0 : ffffff806f5693c0
Call trace:
__task_pid_nr_ns+0x74/0xd0
...
__handle_irq_event_percpu+0xd4/0x284
handle_irq_event+0x48/0xb0
handle_fasteoi_irq+0x160/0x2d8
generic_handle_domain_irq+0x44/0x60
gic_handle_irq+0x4c/0x114
call_on_irq_stack+0x3c/0x74
do_interrupt_handler+0x4c/0x84
el1_interrupt+0x34/0x58
el1h_64_irq_handler+0x18/0x24
el1h_64_irq+0x68/0x6c
account_kernel_stack+0x60/0x144
exit_task_stack_account+0x1c/0x80
do_exit+0x7e4/0xaf8
...
get_signal+0x7bc/0x8d8
do_notify_resume+0x128/0x828
el0_svc+0x6c/0x70
el0t_64_sync_handler+0x68/0xbc
el0t_64_sync+0x1a8/0x1ac
Code: 35fffe54 911a02a8 f9400108 b4000128 (b9405a69)
---[ end trace 0000000000000000 ]---
Kernel panic - not syncing: Oops: Fatal exception in interrupt |
| In the Linux kernel, the following vulnerability has been resolved:
gve: Implement gettimex64 with -EOPNOTSUPP
gve implemented a ptp_clock for sole use of do_aux_work at this time.
ptp_clock_gettime() and ptp_sys_offset() assume every ptp_clock has
implemented either gettimex64 or gettime64. Stub gettimex64 and return
-EOPNOTSUPP to prevent NULL dereferencing. |
| In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: bcsp: receive data only if registered
Currently, bcsp_recv() can be called even when the BCSP protocol has not
been registered. This leads to a NULL pointer dereference, as shown in
the following stack trace:
KASAN: null-ptr-deref in range [0x0000000000000108-0x000000000000010f]
RIP: 0010:bcsp_recv+0x13d/0x1740 drivers/bluetooth/hci_bcsp.c:590
Call Trace:
<TASK>
hci_uart_tty_receive+0x194/0x220 drivers/bluetooth/hci_ldisc.c:627
tiocsti+0x23c/0x2c0 drivers/tty/tty_io.c:2290
tty_ioctl+0x626/0xde0 drivers/tty/tty_io.c:2706
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
To prevent this, ensure that the HCI_UART_REGISTERED flag is set before
processing received data. If the protocol is not registered, return
-EUNATCH. |
| In the Linux kernel, the following vulnerability has been resolved:
usb: cdns3: gadget: Use-after-free during failed initialization and exit of cdnsp gadget
In the __cdnsp_gadget_init() and cdnsp_gadget_exit() functions, the gadget
structure (pdev->gadget) was freed before its endpoints.
The endpoints are linked via the ep_list in the gadget structure.
Freeing the gadget first leaves dangling pointers in the endpoint list.
When the endpoints are subsequently freed, this results in a use-after-free.
Fix:
By separating the usb_del_gadget_udc() operation into distinct "del" and
"put" steps, cdnsp_gadget_free_endpoints() can be executed prior to the
final release of the gadget structure with usb_put_gadget().
A patch similar to bb9c74a5bd14("usb: dwc3: gadget: Free gadget structure
only after freeing endpoints"). |
| In the Linux kernel, the following vulnerability has been resolved:
cpufreq: intel_pstate: Fix object lifecycle issue in update_qos_request()
The cpufreq_cpu_put() call in update_qos_request() takes place too early
because the latter subsequently calls freq_qos_update_request() that
indirectly accesses the policy object in question through the QoS request
object passed to it.
Fortunately, update_qos_request() is called under intel_pstate_driver_lock,
so this issue does not matter for changing the intel_pstate operation
mode, but it theoretically can cause a crash to occur on CPU device hot
removal (which currently can only happen in virt, but it is formally
supported nevertheless).
Address this issue by modifying update_qos_request() to drop the
reference to the policy later. |
| In the Linux kernel, the following vulnerability has been resolved:
s390/vfio-ap: fix memory leak in vfio_ap device driver
The device release callback function invoked to release the matrix device
uses the dev_get_drvdata(device *dev) function to retrieve the
pointer to the vfio_matrix_dev object in order to free its storage. The
problem is, this object is not stored as drvdata with the device; since the
kfree function will accept a NULL pointer, the memory for the
vfio_matrix_dev object is never freed.
Since the device being released is contained within the vfio_matrix_dev
object, the container_of macro will be used to retrieve its pointer. |
| In the Linux kernel, the following vulnerability has been resolved:
PCI: Free released resource after coalescing
release_resource() doesn't actually free the resource or resource list
entry so free the resource list entry to avoid a leak. |
| In the Linux kernel, the following vulnerability has been resolved:
x86/kvm: Force legacy PCI hole to UC when overriding MTRRs for TDX/SNP
When running as an SNP or TDX guest under KVM, force the legacy PCI hole,
i.e. memory between Top of Lower Usable DRAM and 4GiB, to be mapped as UC
via a forced variable MTRR range.
In most KVM-based setups, legacy devices such as the HPET and TPM are
enumerated via ACPI. ACPI enumeration includes a Memory32Fixed entry, and
optionally a SystemMemory descriptor for an OperationRegion, e.g. if the
device needs to be accessed via a Control Method.
If a SystemMemory entry is present, then the kernel's ACPI driver will
auto-ioremap the region so that it can be accessed at will. However, the
ACPI spec doesn't provide a way to enumerate the memory type of
SystemMemory regions, i.e. there's no way to tell software that a region
must be mapped as UC vs. WB, etc. As a result, Linux's ACPI driver always
maps SystemMemory regions using ioremap_cache(), i.e. as WB on x86.
The dedicated device drivers however, e.g. the HPET driver and TPM driver,
want to map their associated memory as UC or WC, as accessing PCI devices
using WB is unsupported.
On bare metal and non-CoCO, the conflicting requirements "work" as firmware
configures the PCI hole (and other device memory) to be UC in the MTRRs.
So even though the ACPI mappings request WB, they are forced to UC- in the
kernel's tracking due to the kernel properly handling the MTRR overrides,
and thus are compatible with the drivers' requested WC/UC-.
With force WB MTRRs on SNP and TDX guests, the ACPI mappings get their
requested WB if the ACPI mappings are established before the dedicated
driver code attempts to initialize the device. E.g. if acpi_init()
runs before the corresponding device driver is probed, ACPI's WB mapping
will "win", and result in the driver's ioremap() failing because the
existing WB mapping isn't compatible with the requested WC/UC-.
E.g. when a TPM is emulated by the hypervisor (ignoring the security
implications of relying on what is allegedly an untrusted entity to store
measurements), the TPM driver will request UC and fail:
[ 1.730459] ioremap error for 0xfed40000-0xfed45000, requested 0x2, got 0x0
[ 1.732780] tpm_tis MSFT0101:00: probe with driver tpm_tis failed with error -12
Note, the '0x2' and '0x0' values refer to "enum page_cache_mode", not x86's
memtypes (which frustratingly are an almost pure inversion; 2 == WB, 0 == UC).
E.g. tracing mapping requests for TPM TIS yields:
Mapping TPM TIS with req_type = 0
WARNING: CPU: 22 PID: 1 at arch/x86/mm/pat/memtype.c:530 memtype_reserve+0x2ab/0x460
Modules linked in:
CPU: 22 UID: 0 PID: 1 Comm: swapper/0 Tainted: G W 6.16.0-rc7+ #2 VOLUNTARY
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/29/2025
RIP: 0010:memtype_reserve+0x2ab/0x460
__ioremap_caller+0x16d/0x3d0
ioremap_cache+0x17/0x30
x86_acpi_os_ioremap+0xe/0x20
acpi_os_map_iomem+0x1f3/0x240
acpi_os_map_memory+0xe/0x20
acpi_ex_system_memory_space_handler+0x273/0x440
acpi_ev_address_space_dispatch+0x176/0x4c0
acpi_ex_access_region+0x2ad/0x530
acpi_ex_field_datum_io+0xa2/0x4f0
acpi_ex_extract_from_field+0x296/0x3e0
acpi_ex_read_data_from_field+0xd1/0x460
acpi_ex_resolve_node_to_value+0x2ee/0x530
acpi_ex_resolve_to_value+0x1f2/0x540
acpi_ds_evaluate_name_path+0x11b/0x190
acpi_ds_exec_end_op+0x456/0x960
acpi_ps_parse_loop+0x27a/0xa50
acpi_ps_parse_aml+0x226/0x600
acpi_ps_execute_method+0x172/0x3e0
acpi_ns_evaluate+0x175/0x5f0
acpi_evaluate_object+0x213/0x490
acpi_evaluate_integer+0x6d/0x140
acpi_bus_get_status+0x93/0x150
acpi_add_single_object+0x43a/0x7c0
acpi_bus_check_add+0x149/0x3a0
acpi_bus_check_add_1+0x16/0x30
acpi_ns_walk_namespace+0x22c/0x360
acpi_walk_namespace+0x15c/0x170
acpi_bus_scan+0x1dd/0x200
acpi_scan_init+0xe5/0x2b0
acpi_init+0x264/0x5b0
do_one_i
---truncated--- |
| In the Linux kernel, the following vulnerability has been resolved:
drm/msm: Fix bootup splat with separate_gpu_drm modparam
The drm_gem_for_each_gpuvm_bo() call from lookup_vma() accesses
drm_gem_obj.gpuva.list, which is not initialized when the drm driver
does not support DRIVER_GEM_GPUVA feature. Enable it for msm_kms
drm driver to fix the splat seen when msm.separate_gpu_drm=1 modparam
is set:
[ 9.506020] Unable to handle kernel paging request at virtual address fffffffffffffff0
[ 9.523160] Mem abort info:
[ 9.523161] ESR = 0x0000000096000006
[ 9.523163] EC = 0x25: DABT (current EL), IL = 32 bits
[ 9.523165] SET = 0, FnV = 0
[ 9.523166] EA = 0, S1PTW = 0
[ 9.523167] FSC = 0x06: level 2 translation fault
[ 9.523169] Data abort info:
[ 9.523170] ISV = 0, ISS = 0x00000006, ISS2 = 0x00000000
[ 9.523171] CM = 0, WnR = 0, TnD = 0, TagAccess = 0
[ 9.523172] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[ 9.523174] swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000ad370f000
[ 9.523176] [fffffffffffffff0] pgd=0000000000000000, p4d=0000000ad4787403, pud=0000000ad4788403, pmd=0000000000000000
[ 9.523184] Internal error: Oops: 0000000096000006 [#1] SMP
[ 9.592968] CPU: 9 UID: 0 PID: 448 Comm: (udev-worker) Not tainted 6.17.0-rc4-assorted-fix-00005-g0e9bb53a2282-dirty #3 PREEMPT
[ 9.592970] Hardware name: Qualcomm CRD, BIOS 6.0.240718.BOOT.MXF.2.4-00515-HAMOA-1 07/18/2024
[ 9.592971] pstate: a1400005 (NzCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)
[ 9.592973] pc : lookup_vma+0x28/0xe0 [msm]
[ 9.592996] lr : get_vma_locked+0x2c/0x128 [msm]
[ 9.763632] sp : ffff800082dab460
[ 9.763666] Call trace:
[ 9.763668] lookup_vma+0x28/0xe0 [msm] (P)
[ 9.763688] get_vma_locked+0x2c/0x128 [msm]
[ 9.763706] msm_gem_get_and_pin_iova_range+0x68/0x11c [msm]
[ 9.763723] msm_gem_get_and_pin_iova+0x18/0x24 [msm]
[ 9.763740] msm_fbdev_driver_fbdev_probe+0xd0/0x258 [msm]
[ 9.763760] __drm_fb_helper_initial_config_and_unlock+0x288/0x528 [drm_kms_helper]
[ 9.763771] drm_fb_helper_initial_config+0x44/0x54 [drm_kms_helper]
[ 9.763779] drm_fbdev_client_hotplug+0x84/0xd4 [drm_client_lib]
[ 9.763782] drm_client_register+0x58/0x9c [drm]
[ 9.763806] drm_fbdev_client_setup+0xe8/0xcf0 [drm_client_lib]
[ 9.763809] drm_client_setup+0xb4/0xd8 [drm_client_lib]
[ 9.763811] msm_drm_kms_post_init+0x2c/0x3c [msm]
[ 9.763830] msm_drm_init+0x1a8/0x22c [msm]
[ 9.763848] msm_drm_bind+0x30/0x3c [msm]
[ 9.919273] try_to_bring_up_aggregate_device+0x168/0x1d4
[ 9.919283] __component_add+0xa4/0x170
[ 9.919286] component_add+0x14/0x20
[ 9.919288] msm_dp_display_probe_tail+0x4c/0xac [msm]
[ 9.919315] msm_dp_auxbus_done_probe+0x14/0x20 [msm]
[ 9.919335] dp_aux_ep_probe+0x4c/0xf0 [drm_dp_aux_bus]
[ 9.919341] really_probe+0xbc/0x298
[ 9.919345] __driver_probe_device+0x78/0x12c
[ 9.919348] driver_probe_device+0x40/0x160
[ 9.919350] __driver_attach+0x94/0x19c
[ 9.919353] bus_for_each_dev+0x74/0xd4
[ 9.919355] driver_attach+0x24/0x30
[ 9.919358] bus_add_driver+0xe4/0x208
[ 9.919360] driver_register+0x60/0x128
[ 9.919363] __dp_aux_dp_driver_register+0x24/0x30 [drm_dp_aux_bus]
[ 9.919365] atana33xc20_init+0x20/0x1000 [panel_samsung_atna33xc20]
[ 9.919370] do_one_initcall+0x6c/0x1b0
[ 9.919374] do_init_module+0x58/0x234
[ 9.919377] load_module+0x19cc/0x1bd4
[ 9.919380] init_module_from_file+0x84/0xc4
[ 9.919382] __arm64_sys_finit_module+0x1b8/0x2cc
[ 9.919384] invoke_syscall+0x48/0x110
[ 9.919389] el0_svc_common.constprop.0+0xc8/0xe8
[ 9.919393] do_el0_svc+0x20/0x2c
[ 9.919396] el0_svc+0x34/0xf0
[ 9.919401] el0t_64_sync_handler+0xa0/0xe4
[ 9.919403] el0t_64_sync+0x198/0x19c
[ 9.919407] Code: eb0000bf 54000480 d100a003 aa0303e2 (f8418c44)
[ 9.919410] ---[ end trace 0000000000000000 ]---
Patchwork: https://patchwork.freedesktop.org/pa
---truncated--- |
