CVE-2025-38290

In the Linux kernel, the following vulnerability has been resolved:

wifi: ath12k: fix node corruption in ar->arvifs list

In current WLAN recovery code flow, ath12k_core_halt() only reinitializes

the "arvifs" list head. This will cause the list node immediately following

the list head to become an invalid list node. Because the prev of that node

still points to the list head "arvifs", but the next of the list head

"arvifs" no longer points to that list node.

When a WLAN recovery occurs during the execution of a vif removal, and it

happens before the spin_lock_bh(&ar->data_lock) in

ath12k_mac_vdev_delete(), list_del() will detect the previously mentioned

situation, thereby triggering a kernel panic.

The fix is to remove and reinitialize all vif list nodes from the list head

"arvifs" during WLAN halt. The reinitialization is to make the list nodes

valid, ensuring that the list_del() in ath12k_mac_vdev_delete() can execute

normally.

Call trace:

__list_del_entry_valid_or_report+0xd4/0x100 (P)

ath12k_mac_remove_link_interface.isra.0+0xf8/0x2e4 [ath12k]

ath12k_scan_vdev_clean_work+0x40/0x164 [ath12k]

cfg80211_wiphy_work+0xfc/0x100

process_one_work+0x164/0x2d0

worker_thread+0x254/0x380

kthread+0xfc/0x100

ret_from_fork+0x10/0x20

The change is mostly copied from the ath11k patch:

https://lore.kernel.org/all/[email protected]/

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1