CVE-2025-23133

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

wifi: ath11k: update channel list in reg notifier instead reg worker

Currently when ath11k gets a new channel list, it will be processed according to the following steps: 1. update new channel list to cfg80211 and queue regwork. 2. cfg80211 handles new channel list during regwork. 3. update cfg80211's handled channel list to firmware by ath11kregupdatechanlist().

But ath11k will immediately execute step 3 after regwork is just queued. Since step 2 is asynchronous, cfg80211 may not have completed handling the new channel list, which may leading to an out-of-bounds write error: BUG: KASAN: slab-out-of-bounds in ath11kregupdatechanlist Call Trace: ath11kregupdatechanlist+0xbfe/0xfe0 [ath11k] kfree+0x109/0x3a0 ath11kregdupdate+0x1cf/0x350 [ath11k] ath11kregdupdatework+0x14/0x20 [ath11k] processonework+0xe35/0x14c0

Should ensure step 2 is completely done before executing step 3. Thus Wen raised patch[1]. When flag NL80211REGDOMSETBYDRIVER is set, cfg80211 will notify ath11k after step 2 is done.

So enable the flag NL80211REGDOMSETBYDRIVER then cfg80211 will notify ath11k after step 2 is done. At this time, there will be no KASAN bug during the execution of the step 3.

[1] https://patchwork.kernel.org/project/linux-wireless/patch/20230201065313.27203-1-quic_wgong@quicinc.com/

Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPLV1V2SILICONZLITE-3