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 B83641D0414; Wed, 25 Sep 2024 12:12:01 +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=1727266321; cv=none; b=d+w+XIIe6HBDeyx4MChWRoub2fVLjqFnr6CjwdvK3LMbCCwpc1XXkVhKB8OTNAVsRoD/igdvJQKCDJ0FTo3FLYEfj6Dzhlt6IJtctYwcZZObiEyAGyy/xsteca0wZLork5uPncBKQRH9Abg2aq/8/ZAVRWlWNV+jyl5s148GKHs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727266321; c=relaxed/simple; bh=TYxnkDvOyad4YxDihbQO+h0oUGrPysRaxOV8/rS5H3I=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=uD5pOh5SlCw1IDptSzQ5cu8e/BBX2H7xATc09bM8hrgWONdm60o0zPE8DR1UXE+8vuNsNOb86JbZ9wyzemvuMq739KDLPhjADaDqDCaplf5SlksMl4VGkImQF103ejhhs4wPqkiDX+YpL6HNb5Cm5+9IJFBaRBR0xg5h/IX74UI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=UwwDH1LV; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="UwwDH1LV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2A688C4CEC3; Wed, 25 Sep 2024 12:12:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1727266321; bh=TYxnkDvOyad4YxDihbQO+h0oUGrPysRaxOV8/rS5H3I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UwwDH1LVnIb85CT4tRnZiNNrXD3NbHG2kqooKkFUFoL3bcMzL+4Dmm0YwnFzzB1JY 4P2NpHgZ/rfUzX6d2o3tcG2O3HIGSJ7o78+viu1AKWQ+jDdWBp25vBOxNTdIHvVTvI SIfa5falRNT7os+Tneorh1RKeUBOqpd2S/nCRcPyRpkypH/owJo/HHJwgT8fE0QeQW +V2BoEltcoLNFSAI9p3VgpLEKixGAIm0Cr5y/QO97edXF+ZNZjAFtBn+vSUL/OAGkA cCU3Wx4yinpZKfNwfW1MCMkVeLjLa8KoZ+2/2iqB/rUjeTUxSmUn/AGe5jektMkW9o EBqMZn45VwM+A== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Johannes Berg , Miri Korenblit , Sasha Levin , kvalo@kernel.org, gregory.greenman@intel.com, emmanuel.grumbach@intel.com, ilan.peer@intel.com, shaul.triebitz@intel.com, benjamin.berg@intel.com, linux-wireless@vger.kernel.org Subject: [PATCH AUTOSEL 6.6 009/139] wifi: iwlwifi: mvm: drop wrong STA selection in TX Date: Wed, 25 Sep 2024 08:07:09 -0400 Message-ID: <20240925121137.1307574-9-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240925121137.1307574-1-sashal@kernel.org> References: <20240925121137.1307574-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.6.52 Content-Transfer-Encoding: 8bit From: Johannes Berg [ Upstream commit 1c7e1068a7c9c39ed27636db93e71911e0045419 ] This shouldn't happen at all, since in station mode all MMPDUs go through the TXQ for the STA, and not this function. There may or may not be a race in mac80211 through which this might happen for some frames while a station is being added, but in that case we can also just drop the frame and pretend the STA didn't exist yet. Also, the code is simply wrong since it uses deflink, and it's not easy to fix it since the mvmvif->ap_sta pointer cannot be used without the mutex, and perhaps the right link might not even be known. Just drop the frame at that point instead of trying to fix it up. Signed-off-by: Johannes Berg Signed-off-by: Miri Korenblit Link: https://patch.msgid.link/20240808232017.45ad105dc7fe.I6d45c82e5758395d9afb8854057ded03c7dc81d7@changeid Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- .../net/wireless/intel/iwlwifi/mvm/mac80211.c | 16 +++------------- 1 file changed, 3 insertions(+), 13 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c index f973efbbc3795..c6264ff10d883 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c @@ -766,20 +766,10 @@ void iwl_mvm_mac_tx(struct ieee80211_hw *hw, if (ieee80211_is_mgmt(hdr->frame_control)) sta = NULL; - /* If there is no sta, and it's not offchannel - send through AP */ + /* this shouldn't even happen: just drop */ if (!sta && info->control.vif->type == NL80211_IFTYPE_STATION && - !offchannel) { - struct iwl_mvm_vif *mvmvif = - iwl_mvm_vif_from_mac80211(info->control.vif); - u8 ap_sta_id = READ_ONCE(mvmvif->deflink.ap_sta_id); - - if (ap_sta_id < mvm->fw->ucode_capa.num_stations) { - /* mac80211 holds rcu read lock */ - sta = rcu_dereference(mvm->fw_id_to_mac_id[ap_sta_id]); - if (IS_ERR_OR_NULL(sta)) - goto drop; - } - } + !offchannel) + goto drop; if (tmp_sta && !sta && link_id != IEEE80211_LINK_UNSPECIFIED && !ieee80211_is_probe_resp(hdr->frame_control)) { -- 2.43.0