From patchwork Fri Aug 9 19:17:09 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Gustavo A. R. Silva" X-Patchwork-Id: 13759163 X-Patchwork-Delegate: johannes@sipsolutions.net 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 16C88182B3; Fri, 9 Aug 2024 19:17:12 +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=1723231033; cv=none; b=HN3LIOW1jDPipxwyD8EwAiF0hNhlFgYK/4CxsWkYExDYIdjaM5R6jCAAtAmKdymfHIDc0rmJ3fJxiQ6AHkKZFlvYBJHw+G/otP8tQbi8Q4tRvJwTRvjrO9bdpUnHFfnokLHxcNCw38BA36+ONESgkGfg29GM1UjgZuh7ngWt4bw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723231033; c=relaxed/simple; bh=XmL5ncs3p6X8rgr9i2cov2GYQnkuex67uQt9cHDKhfs=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=JA48dSeSOZAVoH5WjJToa5L8mrWqI2zPyTd97Xvo3RNraDa83zVGfHY4yQsB4QUg/Shu84meBbLWg/+VtAlhY7dfV7maGR3VReVwrl3eSNDhWu9vIv3GjMWYShB1yRrQ3G57S58nikptJX8hK4xgwd8lUrXdV+OaBawjeP3Kz3Q= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=U25OXcX1; 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="U25OXcX1" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 952A4C32782; Fri, 9 Aug 2024 19:17:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1723231032; bh=XmL5ncs3p6X8rgr9i2cov2GYQnkuex67uQt9cHDKhfs=; h=Date:From:To:Cc:Subject:From; b=U25OXcX1QIHYgFDdyQWE//lrB98SXdM6pP2FUzHGA9r/Yey7/IMmScfO75IppX2rz /lcsYFavSgW+AWhLXEMmZ4tehDCIofU5PwR327R2VCFUFNszALI9UFhCaNG9oGfhvZ mZcJzOFsQqoBqQ25BD2V1FVjrCqCr6GZwfXIf95bWdfkRPb7ykUi8U7BJgCz/8jTg1 UA9u0lzwdTQLCdKSLM2XGG7jBTecf9pK73lRYl2h/X29ghIxHBAh73l2e04GJJnAlh 0R97nnNCgtK1hollwazKSpHoAqWclhx/L/OmUUnXB0s9UxigzT3h9X9sKAQamj+wRP 1e5UIROKl6z/g== Date: Fri, 9 Aug 2024 13:17:09 -0600 From: "Gustavo A. R. Silva" To: Miri Korenblit , Kalle Valo , Johannes Berg , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni Cc: linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, "Gustavo A. R. Silva" , linux-hardening@vger.kernel.org Subject: [PATCH][next] wifi: iwlwifi: mvm: Use __counted_by() and avoid -Wfamnae warnings Message-ID: Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline -Wflex-array-member-not-at-end was introduced in GCC-14, and we are getting ready to enable it, globally. So, use the `DEFINE_FLEX()` helper for multiple on-stack definitions of flexible structures where the size of their flexible-array members are known at compile-time, and refactor the rest of the code, accordingly. In order to allow for the use of `DEFINE_FLEX()`, a couple of structures were annotated with the `__counted_by()` attribute. With these changes, fix the following warnings: drivers/net/wireless/intel/iwlwifi/mvm/d3.c:124:52: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end] drivers/net/wireless/intel/iwlwifi/mvm/d3.c:2053:51: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end] drivers/net/wireless/intel/iwlwifi/mvm/d3.c:2148:43: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end] drivers/net/wireless/intel/iwlwifi/mvm/d3.c:2211:43: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end] Signed-off-by: Gustavo A. R. Silva --- .../net/wireless/intel/iwlwifi/fw/api/sta.h | 2 +- drivers/net/wireless/intel/iwlwifi/mvm/d3.c | 126 ++++++++---------- drivers/net/wireless/intel/iwlwifi/mvm/sta.c | 2 +- include/net/mac80211.h | 2 +- 4 files changed, 61 insertions(+), 71 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/fw/api/sta.h b/drivers/net/wireless/intel/iwlwifi/fw/api/sta.h index d7f8a276b683..fe6bd34fefa3 100644 --- a/drivers/net/wireless/intel/iwlwifi/fw/api/sta.h +++ b/drivers/net/wireless/intel/iwlwifi/fw/api/sta.h @@ -479,7 +479,7 @@ struct iwl_mvm_wep_key_cmd { u8 decryption_type; u8 flags; u8 reserved; - struct iwl_mvm_wep_key wep_key[]; + struct iwl_mvm_wep_key wep_key[] __counted_by(num_keys); } __packed; /* SEC_CURR_WEP_KEY_CMD_API_S_VER_2 */ /** diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/d3.c b/drivers/net/wireless/intel/iwlwifi/mvm/d3.c index b4d650583ac2..b19579dd8de3 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/d3.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/d3.c @@ -120,19 +120,15 @@ static void iwl_mvm_wowlan_program_keys(struct ieee80211_hw *hw, switch (key->cipher) { case WLAN_CIPHER_SUITE_WEP40: case WLAN_CIPHER_SUITE_WEP104: { /* hack it for now */ - struct { - struct iwl_mvm_wep_key_cmd wep_key_cmd; - struct iwl_mvm_wep_key wep_key; - } __packed wkc = { - .wep_key_cmd.mac_id_n_color = - cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, - mvmvif->color)), - .wep_key_cmd.num_keys = 1, - /* firmware sets STA_KEY_FLG_WEP_13BYTES */ - .wep_key_cmd.decryption_type = STA_KEY_FLG_WEP, - .wep_key.key_index = key->keyidx, - .wep_key.key_size = key->keylen, - }; + DEFINE_FLEX(struct iwl_mvm_wep_key_cmd, wkc, wep_key, num_keys, 1); + + wkc->mac_id_n_color = + cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, + mvmvif->color)); + /* firmware sets STA_KEY_FLG_WEP_13BYTES */ + wkc->decryption_type = STA_KEY_FLG_WEP; + wkc->wep_key[0].key_index = key->keyidx; + wkc->wep_key[0].key_size = key->keylen; /* * This will fail -- the key functions don't set support @@ -142,18 +138,18 @@ static void iwl_mvm_wowlan_program_keys(struct ieee80211_hw *hw, if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) break; - memcpy(&wkc.wep_key.key[3], key->key, key->keylen); + memcpy(&wkc->wep_key[0].key[3], key->key, key->keylen); if (key->keyidx == mvmvif->tx_key_idx) { /* TX key must be at offset 0 */ - wkc.wep_key.key_offset = 0; + wkc->wep_key[0].key_offset = 0; } else { /* others start at 1 */ data->wep_key_idx++; - wkc.wep_key.key_offset = data->wep_key_idx; + wkc->wep_key[0].key_offset = data->wep_key_idx; } mutex_lock(&mvm->mutex); - ret = iwl_mvm_send_cmd_pdu(mvm, WEP_KEY, 0, sizeof(wkc), &wkc); + ret = iwl_mvm_send_cmd_pdu(mvm, WEP_KEY, 0, __struct_size(wkc), wkc); data->error = ret != 0; mvm->ptk_ivlen = key->iv_len; @@ -2049,10 +2045,8 @@ static bool iwl_mvm_mlo_gtk_rekey(struct iwl_wowlan_status_data *status, struct iwl_wowlan_mlo_gtk *mlo_key = &status->mlo_keys[i]; struct ieee80211_key_conf *key, *old_key; struct ieee80211_key_seq seq; - struct { - struct ieee80211_key_conf conf; - u8 key[32]; - } conf = {}; + DEFINE_FLEX(struct ieee80211_key_conf, conf, key, keylen, + WOWLAN_KEY_MAX_SIZE); u16 flags = le16_to_cpu(mlo_key->flags); int j, link_id, key_id, key_type; @@ -2069,40 +2063,40 @@ static bool iwl_mvm_mlo_gtk_rekey(struct iwl_wowlan_status_data *status, key_type >= WOWLAN_MLO_GTK_KEY_NUM_TYPES)) continue; - conf.conf.cipher = old_keys->cipher[link_id][key_type]; + conf->cipher = old_keys->cipher[link_id][key_type]; /* WARN_ON? */ - if (!conf.conf.cipher) + if (!conf->cipher) continue; - conf.conf.keylen = 0; - switch (conf.conf.cipher) { + conf->keylen = 0; + switch (conf->cipher) { case WLAN_CIPHER_SUITE_CCMP: case WLAN_CIPHER_SUITE_GCMP: - conf.conf.keylen = WLAN_KEY_LEN_CCMP; + conf->keylen = WLAN_KEY_LEN_CCMP; break; case WLAN_CIPHER_SUITE_GCMP_256: - conf.conf.keylen = WLAN_KEY_LEN_GCMP_256; + conf->keylen = WLAN_KEY_LEN_GCMP_256; break; case WLAN_CIPHER_SUITE_BIP_GMAC_128: - conf.conf.keylen = WLAN_KEY_LEN_BIP_GMAC_128; + conf->keylen = WLAN_KEY_LEN_BIP_GMAC_128; break; case WLAN_CIPHER_SUITE_BIP_GMAC_256: - conf.conf.keylen = WLAN_KEY_LEN_BIP_GMAC_256; + conf->keylen = WLAN_KEY_LEN_BIP_GMAC_256; break; case WLAN_CIPHER_SUITE_AES_CMAC: - conf.conf.keylen = WLAN_KEY_LEN_AES_CMAC; + conf->keylen = WLAN_KEY_LEN_AES_CMAC; break; case WLAN_CIPHER_SUITE_BIP_CMAC_256: - conf.conf.keylen = WLAN_KEY_LEN_BIP_CMAC_256; + conf->keylen = WLAN_KEY_LEN_BIP_CMAC_256; break; } - if (WARN_ON(!conf.conf.keylen || - conf.conf.keylen > sizeof(conf.key))) + if (WARN_ON(!conf->keylen || + conf->keylen > WOWLAN_KEY_MAX_SIZE)) continue; - memcpy(conf.conf.key, mlo_key->key, conf.conf.keylen); - conf.conf.keyidx = key_id; + memcpy(conf->key, mlo_key->key, conf->keylen); + conf->keyidx = key_id; old_key = old_keys->key[link_id][key_id]; if (old_key) { @@ -2114,7 +2108,7 @@ static bool iwl_mvm_mlo_gtk_rekey(struct iwl_wowlan_status_data *status, IWL_DEBUG_WOWLAN(mvm, "Add MLO key id %d, link id %d\n", key_id, link_id); - key = ieee80211_gtk_rekey_add(vif, &conf.conf, link_id); + key = ieee80211_gtk_rekey_add(vif, conf, link_id); if (WARN_ON(IS_ERR(key))) { ret = false; goto out; @@ -2144,30 +2138,28 @@ static bool iwl_mvm_gtk_rekey(struct iwl_wowlan_status_data *status, { int i, j; struct ieee80211_key_conf *key; - struct { - struct ieee80211_key_conf conf; - u8 key[32]; - } conf = { - .conf.cipher = gtk_cipher, - }; + DEFINE_FLEX(struct ieee80211_key_conf, conf, key, keylen, + WOWLAN_KEY_MAX_SIZE); int link_id = vif->active_links ? __ffs(vif->active_links) : -1; + conf->cipher = gtk_cipher; + BUILD_BUG_ON(WLAN_KEY_LEN_CCMP != WLAN_KEY_LEN_GCMP); - BUILD_BUG_ON(sizeof(conf.key) < WLAN_KEY_LEN_CCMP); - BUILD_BUG_ON(sizeof(conf.key) < WLAN_KEY_LEN_GCMP_256); - BUILD_BUG_ON(sizeof(conf.key) < WLAN_KEY_LEN_TKIP); - BUILD_BUG_ON(sizeof(conf.key) < sizeof(status->gtk[0].key)); + BUILD_BUG_ON(conf->keylen < WLAN_KEY_LEN_CCMP); + BUILD_BUG_ON(conf->keylen < WLAN_KEY_LEN_GCMP_256); + BUILD_BUG_ON(conf->keylen < WLAN_KEY_LEN_TKIP); + BUILD_BUG_ON(conf->keylen < sizeof(status->gtk[0].key)); switch (gtk_cipher) { case WLAN_CIPHER_SUITE_CCMP: case WLAN_CIPHER_SUITE_GCMP: - conf.conf.keylen = WLAN_KEY_LEN_CCMP; + conf->keylen = WLAN_KEY_LEN_CCMP; break; case WLAN_CIPHER_SUITE_GCMP_256: - conf.conf.keylen = WLAN_KEY_LEN_GCMP_256; + conf->keylen = WLAN_KEY_LEN_GCMP_256; break; case WLAN_CIPHER_SUITE_TKIP: - conf.conf.keylen = WLAN_KEY_LEN_TKIP; + conf->keylen = WLAN_KEY_LEN_TKIP; break; default: WARN_ON(1); @@ -2177,14 +2169,14 @@ static bool iwl_mvm_gtk_rekey(struct iwl_wowlan_status_data *status, if (!status->gtk[i].len) continue; - conf.conf.keyidx = status->gtk[i].id; + conf->keyidx = status->gtk[i].id; IWL_DEBUG_WOWLAN(mvm, "Received from FW GTK cipher %d, key index %d\n", - conf.conf.cipher, conf.conf.keyidx); - memcpy(conf.conf.key, status->gtk[i].key, + conf->cipher, conf->keyidx); + memcpy(conf->key, status->gtk[i].key, sizeof(status->gtk[i].key)); - key = ieee80211_gtk_rekey_add(vif, &conf.conf, link_id); + key = ieee80211_gtk_rekey_add(vif, conf, link_id); if (IS_ERR(key)) return false; @@ -2207,41 +2199,39 @@ iwl_mvm_d3_igtk_bigtk_rekey_add(struct iwl_wowlan_status_data *status, struct iwl_multicast_key_data *key_data) { struct ieee80211_key_conf *key_config; - struct { - struct ieee80211_key_conf conf; - u8 key[WOWLAN_KEY_MAX_SIZE]; - } conf = { - .conf.cipher = cipher, - .conf.keyidx = key_data->id, - }; + DEFINE_FLEX(struct ieee80211_key_conf, conf, key, keylen, + WOWLAN_KEY_MAX_SIZE); struct ieee80211_key_seq seq; int link_id = vif->active_links ? __ffs(vif->active_links) : -1; + conf->cipher = cipher; + conf->keyidx = key_data->id; + if (!key_data->len) return true; - iwl_mvm_d3_set_igtk_bigtk_ipn(key_data, &seq, conf.conf.cipher); + iwl_mvm_d3_set_igtk_bigtk_ipn(key_data, &seq, conf->cipher); switch (cipher) { case WLAN_CIPHER_SUITE_BIP_GMAC_128: - conf.conf.keylen = WLAN_KEY_LEN_BIP_GMAC_128; + conf->keylen = WLAN_KEY_LEN_BIP_GMAC_128; break; case WLAN_CIPHER_SUITE_BIP_GMAC_256: - conf.conf.keylen = WLAN_KEY_LEN_BIP_GMAC_256; + conf->keylen = WLAN_KEY_LEN_BIP_GMAC_256; break; case WLAN_CIPHER_SUITE_AES_CMAC: - conf.conf.keylen = WLAN_KEY_LEN_AES_CMAC; + conf->keylen = WLAN_KEY_LEN_AES_CMAC; break; case WLAN_CIPHER_SUITE_BIP_CMAC_256: - conf.conf.keylen = WLAN_KEY_LEN_BIP_CMAC_256; + conf->keylen = WLAN_KEY_LEN_BIP_CMAC_256; break; default: WARN_ON(1); } - BUILD_BUG_ON(sizeof(conf.key) < sizeof(key_data->key)); - memcpy(conf.conf.key, key_data->key, conf.conf.keylen); + BUILD_BUG_ON(WOWLAN_KEY_MAX_SIZE < sizeof(key_data->key)); + memcpy(conf->key, key_data->key, conf->keylen); - key_config = ieee80211_gtk_rekey_add(vif, &conf.conf, link_id); + key_config = ieee80211_gtk_rekey_add(vif, conf, link_id); if (IS_ERR(key_config)) return false; ieee80211_set_key_rx_seq(key_config, 0, &seq); diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c index 15e64d94d6ea..7e550d880584 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c @@ -4350,8 +4350,8 @@ int iwl_mvm_add_pasn_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif, goto out; keyconf->cipher = cipher; - memcpy(keyconf->key, key, key_len); keyconf->keylen = key_len; + memcpy(keyconf->key, key, keyconf->key_len); keyconf->flags = IEEE80211_KEY_FLAG_PAIRWISE; if (mld) { diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 0a04eaf5343c..d3f6056daf8a 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -2222,7 +2222,7 @@ struct ieee80211_key_conf { u16 flags; s8 link_id; u8 keylen; - u8 key[]; + u8 key[] __counted_by(keylen); }; #define IEEE80211_MAX_PN_LEN 16