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[PATCH] Revert "drm/amd/display: Only restore backlight after amdgpu_dm_init or dm_resume"

by Matthew Schwartz

This fix regressed the original issue that commit d83c747a1225 ("drm/amd/display: Fix brightness level not retained over reboot") solved, so revert it until a different approach to solve the regression that it caused with AMD_PRIVATE_COLOR is found. Fixes: a490c8d77d50 ("drm/amd/display: Only restore backlight after amdgpu_dm_init or dm_resume") Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4620 Signed-off-by: Matthew Schwartz <matthew.schwartz(a)linux.dev> --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 12 ++++-------- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 7 ------- 2 files changed, 4 insertions(+), 15 deletions(-) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 8e1622bf7a42..21281e684b84 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -2081,8 +2081,6 @@ static int amdgpu_dm_init(struct amdgpu_device *adev) dc_hardware_init(adev->dm.dc); - adev->dm.restore_backlight = true; - adev->dm.hpd_rx_offload_wq = hpd_rx_irq_create_workqueue(adev); if (!adev->dm.hpd_rx_offload_wq) { drm_err(adev_to_drm(adev), "failed to create hpd rx offload workqueue.\n"); @@ -3438,7 +3436,6 @@ static int dm_resume(struct amdgpu_ip_block *ip_block) dc_set_power_state(dm->dc, DC_ACPI_CM_POWER_STATE_D0); dc_resume(dm->dc); - adev->dm.restore_backlight = true; amdgpu_dm_irq_resume_early(adev); @@ -9965,6 +9962,7 @@ static void amdgpu_dm_commit_streams(struct drm_atomic_state *state, bool mode_set_reset_required = false; u32 i; struct dc_commit_streams_params params = {dc_state->streams, dc_state->stream_count}; + bool set_backlight_level = false; /* Disable writeback */ for_each_old_connector_in_state(state, connector, old_con_state, i) { @@ -10084,6 +10082,7 @@ static void amdgpu_dm_commit_streams(struct drm_atomic_state *state, acrtc->hw_mode = new_crtc_state->mode; crtc->hwmode = new_crtc_state->mode; mode_set_reset_required = true; + set_backlight_level = true; } else if (modereset_required(new_crtc_state)) { drm_dbg_atomic(dev, "Atomic commit: RESET. crtc id %d:[%p]\n", @@ -10140,16 +10139,13 @@ static void amdgpu_dm_commit_streams(struct drm_atomic_state *state, * to fix a flicker issue. * It will cause the dm->actual_brightness is not the current panel brightness * level. (the dm->brightness is the correct panel level) - * So we set the backlight level with dm->brightness value after initial - * set mode. Use restore_backlight flag to avoid setting backlight level - * for every subsequent mode set. + * So we set the backlight level with dm->brightness value after set mode */ - if (dm->restore_backlight) { + if (set_backlight_level) { for (i = 0; i < dm->num_of_edps; i++) { if (dm->backlight_dev[i]) amdgpu_dm_backlight_set_level(dm, i, dm->brightness[i]); } - dm->restore_backlight = false; } } diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h index 009f206226f0..db75e991ac7b 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h @@ -630,13 +630,6 @@ struct amdgpu_display_manager { */ u32 actual_brightness[AMDGPU_DM_MAX_NUM_EDP]; - /** - * @restore_backlight: - * - * Flag to indicate whether to restore backlight after modeset. - */ - bool restore_backlight; - /** * @aux_hpd_discon_quirk: * -- 2.51.0

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[PATCH v2 14/14] iommu/tegra: fix device leak on probe_device()

by Johan Hovold

Make sure to drop the reference taken to the iommu platform device when looking up its driver data during probe_device(). Note that commit 9826e393e4a8 ("iommu/tegra-smmu: Fix missing put_device() call in tegra_smmu_find") fixed the leak in an error path, but the reference is still leaking on success. Fixes: 891846516317 ("memory: Add NVIDIA Tegra memory controller support") Cc: stable(a)vger.kernel.org # 3.19: 9826e393e4a8 Cc: Thierry Reding <treding(a)nvidia.com> Cc: Miaoqian Lin <linmq006(a)gmail.com> Acked-by: Robin Murphy <robin.murphy(a)arm.com> Signed-off-by: Johan Hovold <johan(a)kernel.org> --- drivers/iommu/tegra-smmu.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c index 36cdd5fbab07..f6f26a072820 100644 --- a/drivers/iommu/tegra-smmu.c +++ b/drivers/iommu/tegra-smmu.c @@ -830,10 +830,9 @@ static struct tegra_smmu *tegra_smmu_find(struct device_node *np) return NULL; mc = platform_get_drvdata(pdev); - if (!mc) { - put_device(&pdev->dev); + put_device(&pdev->dev); + if (!mc) return NULL; - } return mc->smmu; } -- 2.49.1

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[PATCH] Bluetooth: bfusb: Fix buffer over-read in rx processing loop

by pip-izony

From: Seungjin Bae <eeodqql09(a)gmail.com> The bfusb_rx_complete() function parses incoming URB data in while loop. The logic does not sufficiently validate the remaining buffer size(count) accross loop iterations, which can lead to a buffer over-read. For example, with 4-bytes remaining buffer, if the first iteration takes the `hdr & 0x4000` branch, 2-bytes are consumed. On the next iteration, only 2-bytes remain, but the else branch is trying to access the third byte(buf[2]). This causes an out-of-bounds read and a potential kernel panic. This patch fixes the vulnerability by adding checks to ensure enough data remains in the buffer before it is accessed. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Seungjin Bae <eeodqql09(a)gmail.com> --- drivers/bluetooth/bfusb.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/bluetooth/bfusb.c b/drivers/bluetooth/bfusb.c index 8df310983bf6..f17eae6dbd7d 100644 --- a/drivers/bluetooth/bfusb.c +++ b/drivers/bluetooth/bfusb.c @@ -360,6 +360,10 @@ static void bfusb_rx_complete(struct urb *urb) count -= 2; buf += 2; } else { + if (count < 3) { + bf_dev_err(data->hdev, "block header is too short"); + break; + } len = (buf[2] == 0) ? 256 : buf[2]; count -= 3; buf += 3; -- 2.43.0

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[PATCH for 5.15] platform/x86: int3472: Check for adev == NULL

by Nobuhiro Iwamatsu

From: Hans de Goede <hdegoede(a)redhat.com> commit cd2fd6eab480dfc247b737cf7a3d6b009c4d0f1c upstream. Not all devices have an ACPI companion fwnode, so adev might be NULL. This can e.g. (theoretically) happen when a user manually binds one of the int3472 drivers to another i2c/platform device through sysfs. Add a check for adev not being set and return -ENODEV in that case to avoid a possible NULL pointer deref in skl_int3472_get_acpi_buffer(). Signed-off-by: Hans de Goede <hdegoede(a)redhat.com> Link: https://lore.kernel.org/r/20241209220522.25288-1-hdegoede@redhat.com Reviewed-by: Ilpo Järvinen <ilpo.jarvinen(a)linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen(a)linux.intel.com> [iwamatsu: adjusted context] Signed-off-by: Nobuhiro Iwamatsu (CIP) <nobuhiro.iwamatsu.x90(a)mail.toshiba> --- drivers/platform/x86/intel/int3472/discrete.c | 3 +++ drivers/platform/x86/intel/int3472/tps68470.c | 3 +++ 2 files changed, 6 insertions(+) diff --git a/drivers/platform/x86/intel/int3472/discrete.c b/drivers/platform/x86/intel/int3472/discrete.c index 401fa8f223d622..31494f4247864e 100644 --- a/drivers/platform/x86/intel/int3472/discrete.c +++ b/drivers/platform/x86/intel/int3472/discrete.c @@ -345,6 +345,9 @@ static int skl_int3472_discrete_probe(struct platform_device *pdev) struct int3472_cldb cldb; int ret; + if (!adev) + return -ENODEV; + ret = skl_int3472_fill_cldb(adev, &cldb); if (ret) { dev_err(&pdev->dev, "Couldn't fill CLDB structure\n"); diff --git a/drivers/platform/x86/intel/int3472/tps68470.c b/drivers/platform/x86/intel/int3472/tps68470.c index fd3bef449137cf..b3faae7b23736a 100644 --- a/drivers/platform/x86/intel/int3472/tps68470.c +++ b/drivers/platform/x86/intel/int3472/tps68470.c @@ -102,6 +102,9 @@ static int skl_int3472_tps68470_probe(struct i2c_client *client) int device_type; int ret; + if (!adev) + return -ENODEV; + regmap = devm_regmap_init_i2c(client, &tps68470_regmap_config); if (IS_ERR(regmap)) { dev_err(&client->dev, "Failed to create regmap: %ld\n", PTR_ERR(regmap)); -- 2.51.0

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[PATCH v1] ALSA: hda/tas2781: Enable init_profile_id for device initialization

by Shenghao Ding

Optimize the time consumption of profile switching, init_profile saves the common settings of different profiles, such as the dsp coefficients, etc, which can greatly reduce the profile switching time comsumption and remove the repetitive settings. Fixes: e83dcd139e77 ("ASoC: tas2781: Add keyword "init" in profile section") Signed-off-by: Shenghao Ding <shenghao-ding(a)ti.com> --- sound/hda/codecs/side-codecs/tas2781_hda_i2c.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c b/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c index 4dea442d8c30..a126f04c3ed7 100644 --- a/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c +++ b/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c @@ -474,6 +474,12 @@ static void tasdevice_dspfw_init(void *context) if (tas_priv->fmw->nr_configurations > 0) tas_priv->cur_conf = 0; + /* Init common setting for different audio profiles */ + if (tas_priv->rcabin.init_profile_id >= 0) + tasdevice_select_cfg_blk(tas_priv, + tas_priv->rcabin.init_profile_id, + TASDEVICE_BIN_BLK_PRE_POWER_UP); + /* If calibrated data occurs error, dsp will still works with default * calibrated data inside algo. */ @@ -770,6 +776,12 @@ static int tas2781_system_resume(struct device *dev) tasdevice_reset(tas_hda->priv); tasdevice_prmg_load(tas_hda->priv, tas_hda->priv->cur_prog); + /* Init common setting for different audio profiles */ + if (tas_hda->priv->rcabin.init_profile_id >= 0) + tasdevice_select_cfg_blk(tas_hda->priv, + tas_hda->priv->rcabin.init_profile_id, + TASDEVICE_BIN_BLK_PRE_POWER_UP); + if (tas_hda->priv->playback_started) tasdevice_tuning_switch(tas_hda->priv, 0); -- 2.43.0

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[PATCH linux-next v2 0/2] ksm: fix exec/fork inheritance

by xu.xin16＠zte.com.cn

From: xu xin <xu.xin16(a)zte.com.cn> This series aim to fix exec/fork inheritance. See the detailed description of issue at the following patch. PATCH 1: the patch to fix the issue. PATCH 2: a reproduce program or testcase. xu xin (2): mm/ksm: fix exec/fork inheritance support for prctl selftests: update ksm inheritation tests for prctl fork/exec include/linux/ksm.h | 4 +- mm/ksm.c | 20 ++++++- .../selftests/mm/ksm_functional_tests.c | 57 +++++++++++++++++++ 3 files changed, 76 insertions(+), 5 deletions(-) -- 2.25.1

1 month, 2 weeks

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[PATCH] usb: gadget: udc: fix race condition in usb_del_gadget

by Jimmy Hu

A race condition during gadget teardown can lead to a use-after-free in usb_gadget_state_work(), as reported by KASAN: BUG: KASAN: invalid-access in sysfs_notify+0_x_2c/0_x_d0 Workqueue: events usb_gadget_state_work The fundamental race occurs because a concurrent event (e.g., an interrupt) can call usb_gadget_set_state() and schedule gadget->work at any time during the cleanup process in usb_del_gadget(). Commit 399a45e5237c ("usb: gadget: core: flush gadget workqueue after device removal") attempted to fix this by moving flush_work() to after device_del(). However, this does not fully solve the race, as a new work item can still be scheduled *after* flush_work() completes but before the gadget's memory is freed, leading to the same use-after-free. This patch fixes the race condition robustly by introducing a 'teardown' flag and a 'state_lock' spinlock to the usb_gadget struct. The flag is set during cleanup in usb_del_gadget() *before* calling flush_work() to prevent any new work from being scheduled once cleanup has commenced. The scheduling site, usb_gadget_set_state(), now checks this flag under the lock before queueing the work, thus safely closing the race window. Fixes: 5702f75375aa9 ("usb: gadget: udc-core: move sysfs_notify() to a workqueue") Signed-off-by: Jimmy Hu <hhhuuu(a)google.com> Cc: stable(a)vger.kernel.org --- drivers/usb/gadget/udc/core.c | 18 +++++++++++++++++- include/linux/usb/gadget.h | 6 ++++++ 2 files changed, 23 insertions(+), 1 deletion(-) diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c index d709e24c1fd4..c4268b76d747 100644 --- a/drivers/usb/gadget/udc/core.c +++ b/drivers/usb/gadget/udc/core.c @@ -1123,8 +1123,13 @@ static void usb_gadget_state_work(struct work_struct *work) void usb_gadget_set_state(struct usb_gadget *gadget, enum usb_device_state state) { + unsigned long flags; + + spin_lock_irqsave(&gadget->state_lock, flags); gadget->state = state; - schedule_work(&gadget->work); + if (!gadget->teardown) + schedule_work(&gadget->work); + spin_unlock_irqrestore(&gadget->state_lock, flags); } EXPORT_SYMBOL_GPL(usb_gadget_set_state); @@ -1357,6 +1362,9 @@ static void usb_udc_nop_release(struct device *dev) void usb_initialize_gadget(struct device *parent, struct usb_gadget *gadget, void (*release)(struct device *dev)) { + /* For race-free teardown */ + spin_lock_init(&gadget->state_lock); + gadget->teardown = false; INIT_WORK(&gadget->work, usb_gadget_state_work); gadget->dev.parent = parent; @@ -1531,6 +1539,7 @@ EXPORT_SYMBOL_GPL(usb_add_gadget_udc); void usb_del_gadget(struct usb_gadget *gadget) { struct usb_udc *udc = gadget->udc; + unsigned long flags; if (!udc) return; @@ -1544,6 +1553,13 @@ void usb_del_gadget(struct usb_gadget *gadget) kobject_uevent(&udc->dev.kobj, KOBJ_REMOVE); sysfs_remove_link(&udc->dev.kobj, "gadget"); device_del(&gadget->dev); + /* + * Set the teardown flag before flushing the work to prevent new work + * from being scheduled while we are cleaning up. + */ + spin_lock_irqsave(&gadget->state_lock, flags); + gadget->teardown = true; + spin_unlock_irqrestore(&gadget->state_lock, flags); flush_work(&gadget->work); ida_free(&gadget_id_numbers, gadget->id_number); cancel_work_sync(&udc->vbus_work); diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h index 0f28c5512fcb..8302aeaea82e 100644 --- a/include/linux/usb/gadget.h +++ b/include/linux/usb/gadget.h @@ -351,6 +351,9 @@ struct usb_gadget_ops { * can handle. The UDC must support this and all slower speeds and lower * number of lanes. * @state: the state we are now (attached, suspended, configured, etc) + * @state_lock: Spinlock protecting the `state` and `teardown` members. + * @teardown: True if the device is undergoing teardown, used to prevent + * new work from being scheduled during cleanup. * @name: Identifies the controller hardware type. Used in diagnostics * and sometimes configuration. * @dev: Driver model state for this abstract device. @@ -426,6 +429,9 @@ struct usb_gadget { enum usb_ssp_rate max_ssp_rate; enum usb_device_state state; + /* For race-free teardown and state management */ + spinlock_t state_lock; + bool teardown; const char *name; struct device dev; unsigned isoch_delay; -- 2.51.0.618.g983fd99d29-goog

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+ mm-huge_memory-add-pmd-folio-to-ds_queue-in-do_huge_zero_wp_pmd.patch added to mm-new branch

by Andrew Morton

The patch titled Subject: mm/huge_memory: add pmd folio to ds_queue in do_huge_zero_wp_pmd() has been added to the -mm mm-new branch. Its filename is mm-huge_memory-add-pmd-folio-to-ds_queue-in-do_huge_zero_wp_pmd.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patche… This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Wei Yang <richard.weiyang(a)gmail.com> Subject: mm/huge_memory: add pmd folio to ds_queue in do_huge_zero_wp_pmd() Date: Wed, 8 Oct 2025 09:54:52 +0000 We add pmd folio into ds_queue on the first page fault in __do_huge_pmd_anonymous_page(), so that we can split it in case of memory pressure. This should be the same for a pmd folio during wp page fault. Commit 1ced09e0331f ("mm: allocate THP on hugezeropage wp-fault") miss to add it to ds_queue, which means system may not reclaim enough memory in case of memory pressure even the pmd folio is under used. Move deferred_split_folio() into map_anon_folio_pmd() to make the pmd folio installation consistent. Link: https://lkml.kernel.org/r/20251008095453.18772-2-richard.weiyang@gmail.com Fixes: 1ced09e0331f ("mm: allocate THP on hugezeropage wp-fault") Signed-off-by: Wei Yang <richard.weiyang(a)gmail.com> Acked-by: David Hildenbrand <david(a)redhat.com> Reviewed-by: Lance Yang <lance.yang(a)linux.dev> Reviewed-by: Dev Jain <dev.jain(a)arm.com> Acked-by: Usama Arif <usamaarif642(a)gmail.com> Reviewed-by: Zi Yan <ziy(a)nvidia.com> Cc: Matthew Wilcox <willy(a)infradead.org> Cc: <stable(a)vger.kernel.org> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- mm/huge_memory.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/huge_memory.c~mm-huge_memory-add-pmd-folio-to-ds_queue-in-do_huge_zero_wp_pmd +++ a/mm/huge_memory.c @@ -1317,6 +1317,7 @@ static void map_anon_folio_pmd(struct fo count_vm_event(THP_FAULT_ALLOC); count_mthp_stat(HPAGE_PMD_ORDER, MTHP_STAT_ANON_FAULT_ALLOC); count_memcg_event_mm(vma->vm_mm, THP_FAULT_ALLOC); + deferred_split_folio(folio, false); } static vm_fault_t __do_huge_pmd_anonymous_page(struct vm_fault *vmf) @@ -1357,7 +1358,6 @@ static vm_fault_t __do_huge_pmd_anonymou pgtable_trans_huge_deposit(vma->vm_mm, vmf->pmd, pgtable); map_anon_folio_pmd(folio, vmf->pmd, vma, haddr); mm_inc_nr_ptes(vma->vm_mm); - deferred_split_folio(folio, false); spin_unlock(vmf->ptl); } _ Patches currently in -mm which might be from richard.weiyang(a)gmail.com are mm-compaction-check-the-range-to-pageblock_pfn_to_page-is-within-the-zone-first.patch mm-compaction-fix-the-range-to-pageblock_pfn_to_page.patch mm-huge_memory-add-pmd-folio-to-ds_queue-in-do_huge_zero_wp_pmd.patch mm-khugepaged-unify-pmd-folio-installation-with-map_anon_folio_pmd.patch

1 month, 2 weeks

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[PATCH 5.10.y 0/2] drm/amd/display: Fix potential null dereference

by Eslam Khafagy

This series backports commit [52f1783ff414 ("drm/amd/display: Fix potential null dereference")] to stable branch 5.10.y. However to apply this i had to backport commit [3beac533b8da ("drm/amd/display: Remove redundant safeguards for dmub-srv destroy()")] first. Igor Artemiev (1): drm/amd/display: Fix potential null dereference Roman Li (1): drm/amd/display: Remove redundant safeguards for dmub-srv destroy() drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) -- 2.43.0

1 month, 2 weeks

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[PATCH] wifi: mt76: mt7921: fix a potential clc buffer length underflow

by Mingyen Hsieh

From: Leon Yen <leon.yen(a)mediatek.com> The buf_len is used to limit the iterations for retrieving the country power setting and may underflow under certain conditions due to changes in the power table in CLC. This underflow leads to an almost infinite loop or an invalid power setting resulting in driver initialization failure. Cc: stable(a)vger.kernel.org Fixes: fa6ad88e023d ("wifi: mt76: mt7921: fix country count limitation for CLC") Signed-off-by: Leon Yen <leon.yen(a)mediatek.com> Signed-off-by: Ming Yen Hsieh <mingyen.hsieh(a)mediatek.com> --- drivers/net/wireless/mediatek/mt76/mt7921/mcu.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c index 86bd33b916a9..80ccd56409b3 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c +++ b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c @@ -1353,6 +1353,9 @@ int __mt7921_mcu_set_clc(struct mt792x_dev *dev, u8 *alpha2, u16 len = le16_to_cpu(rule->len); u16 offset = len + sizeof(*rule); + if (buf_len < offset) + break; + pos += offset; buf_len -= offset; if (rule->alpha2[0] != alpha2[0] || -- 2.34.1

1 month, 2 weeks

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