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([27.59.95.180]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-824418856d5sm4424201b3a.38.2026.02.07.03.02.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 07 Feb 2026 03:02:45 -0800 (PST) From: Dhyan K Prajapati To: Lachlan Hodges , Johannes Berg Cc: Krzysztof Kozlowski , linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, Dhyan K Prajapati , Dhyan K Prajapati Subject: [PATCH wireless] wifi: mac80211: skip BSS_CHANGED_TXPOWER for monitor interfaces Date: Sat, 7 Feb 2026 16:32:24 +0530 Message-ID: <20260207110224.32755-1-dhyan19022009@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Monitor mode interfaces do not maintain a BSS context, since a commit in July 2025 monitor interfaces with WANT_MONITOR_VIF began receiving link change notification duing ieee80211_add_vitual_monitor(), when ieee_assign_link_chanctx() assigns a channel context, it triggers ieee80211_recalc_txpower() this sends a bss_info_changed callback receive link->conf as the bss_conf prameter, in monitor mode it isn't initialised leading to NULL pointer dereference in drivers like iwldvm, as BSS_CHANGED_TXPOWER is not applicable for monitor mode we can just skip it. Fixes: c57e5b9819df ("wifi: mac80211: fix WARN_ON for monitor mode on some = devices") Tested-by: Dhyan K Prajapati Signed-off-by: Dhyan K Prajapati --- net/mac80211/iface.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c index 515384ca2..47f6bef0e 100644 --- a/net/mac80211/iface.c +++ b/net/mac80211/iface.c @@ -76,8 +76,9 @@ bool __ieee80211_recalc_txpower(struct ieee80211_link_dat= a *link) void ieee80211_recalc_txpower(struct ieee80211_link_data *link, bool update_bss) { - if (__ieee80211_recalc_txpower(link) || - (update_bss && ieee80211_sdata_running(link->sdata))) + if (link->sdata->vif.type !=3D NL80211_IFTYPE_MONITOR && + (__ieee80211_recalc_txpower(link) || + (update_bss && ieee80211_sdata_running(link->sdata)))) ieee80211_link_info_change_notify(link->sdata, link, BSS_CHANGED_TXPOWER); } --=20 2.43.0