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wifi: mac80211: use safe list iteration in radar detect work

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The call to ieee80211_dfs_cac_cancel can cause the iterated chanctx to
be freed and removed from the list. Guard against this to avoid a
slab-use-after-free error.

Cc: stable@vger.kernel.org
Fixes: bca8bc0399 ("wifi: mac80211: handle ieee80211_radar_detected() for MLO")
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Link: https://patch.msgid.link/20260505151539.236d63a1b736.I35dbb9e96a2d4a480be208770fdd99ba3b817b79@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Benjamin Berg 2026-05-05 15:15:40 +02:00 committed by Johannes Berg
parent 714ae274e8
commit ac8eb3e18f
1 changed files with 2 additions and 2 deletions
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4
net/mac80211/util.c
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@ -3700,11 +3700,11 @@ void ieee80211_dfs_radar_detected_work(struct wiphy *wiphy,
struct ieee80211_local *local =
container_of(work, struct ieee80211_local, radar_detected_work);
struct cfg80211_chan_def chandef;
struct ieee80211_chanctx *ctx;
struct ieee80211_chanctx *ctx, *tmp;
lockdep_assert_wiphy(local->hw.wiphy);
list_for_each_entry(ctx, &local->chanctx_list, list) {
list_for_each_entry_safe(ctx, tmp, &local->chanctx_list, list) {
if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
continue;