From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 97F3B1DF26C; Tue, 8 Oct 2024 13:14:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728393252; cv=none; b=COPNyTb6ifLT7Je3qrf+0hbhy3HFK35VbTNYQv191J/23Lw7gDQcwVvpOKV8v3Dk0qfkWnIbieAPwjYNg92aG8BN4A89NRInBYev2kJ7uTdHKlcyWKuF+VkIYKiulH+PyZD9ZGx/FEtnYWKa+aCTim4GK3ura/6terw4Lj8M7jM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728393252; c=relaxed/simple; bh=lWoDC3Kj/CfT3ORuH2fsKJlTq9/a1owyVEzTArK4eAM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Jtla15O7BM7EOFi6uNn9+JQF5ax8Xt3/j/TJYhKovlK9uUXrSR5xbr4BMBJgi2VH0iAwBHIrpq7gSbPdqHlo/RVW2YnU9fAvxQ8A+Q/KGyBbY2V16hH9K8tCX4e7KUJ+AEzyC1qPKmceTyeSY1QEFpaF17l248EKbgPmarjxBjg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=XY67smva; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="XY67smva" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F3471C4CEC7; Tue, 8 Oct 2024 13:14:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1728393252; bh=lWoDC3Kj/CfT3ORuH2fsKJlTq9/a1owyVEzTArK4eAM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XY67smva6xXnIAMm9hiDk5Ll7pzLEWghzmqKmFT9W8wWnBDoFiiLQWcBhisKYJPAL YWjQrHyV1uYcSJvHvhhj5OYCO2PrQb6BZXJwdw1CeTH9ZoVfWjYKUznDlyVBjVbiFa 8ijHcfVzlaXjV23gvQBkZcABro0jB0dkmgoWwpLs= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Miriam Rachel Korenblit , Johannes Berg , Sasha Levin Subject: [PATCH 6.6 098/386] wifi: mac80211: fix RCU list iterations Date: Tue, 8 Oct 2024 14:05:43 +0200 Message-ID: <20241008115633.304669889@linuxfoundation.org> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241008115629.309157387@linuxfoundation.org> References: <20241008115629.309157387@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Johannes Berg [ Upstream commit ac35180032fbc5d80b29af00ba4881815ceefcb6 ] There are a number of places where RCU list iteration is used, but that aren't (always) called with RCU held. Use just list_for_each_entry() in most, and annotate iface iteration with the required locks. Reviewed-by: Miriam Rachel Korenblit Link: https://patch.msgid.link/20240827094939.ed8ac0b2f897.I8443c9c3c0f8051841353491dae758021b53115e@changeid Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- net/mac80211/chan.c | 4 +++- net/mac80211/mlme.c | 2 +- net/mac80211/scan.c | 2 +- net/mac80211/util.c | 4 +++- 4 files changed, 8 insertions(+), 4 deletions(-) diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c index 68952752b5990..c09aed6a3cfcc 100644 --- a/net/mac80211/chan.c +++ b/net/mac80211/chan.c @@ -245,7 +245,9 @@ ieee80211_get_max_required_bw(struct ieee80211_sub_if_data *sdata, enum nl80211_chan_width max_bw = NL80211_CHAN_WIDTH_20_NOHT; struct sta_info *sta; - list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) { + lockdep_assert_wiphy(sdata->local->hw.wiphy); + + list_for_each_entry(sta, &sdata->local->sta_list, list) { if (sdata != sta->sdata && !(sta->sdata->bss && sta->sdata->bss == sdata->bss)) continue; diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 42e2c84ed2484..b14c809bcdea3 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -732,7 +732,7 @@ static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, bool disable_mu_mimo = false; struct ieee80211_sub_if_data *other; - list_for_each_entry_rcu(other, &local->interfaces, list) { + list_for_each_entry(other, &local->interfaces, list) { if (other->vif.bss_conf.mu_mimo_owner) { disable_mu_mimo = true; break; diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c index b58d061333c52..933a58895432f 100644 --- a/net/mac80211/scan.c +++ b/net/mac80211/scan.c @@ -489,7 +489,7 @@ static void __ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted) * the scan was in progress; if there was none this will * just be a no-op for the particular interface. */ - list_for_each_entry_rcu(sdata, &local->interfaces, list) { + list_for_each_entry(sdata, &local->interfaces, list) { if (ieee80211_sdata_running(sdata)) wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); } diff --git a/net/mac80211/util.c b/net/mac80211/util.c index d682c32821a11..02b5aaad2a155 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -745,7 +745,9 @@ static void __iterate_interfaces(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata; bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE; - list_for_each_entry_rcu(sdata, &local->interfaces, list) { + list_for_each_entry_rcu(sdata, &local->interfaces, list, + lockdep_is_held(&local->iflist_mtx) || + lockdep_is_held(&local->hw.wiphy->mtx)) { switch (sdata->vif.type) { case NL80211_IFTYPE_MONITOR: if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) -- 2.43.0