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Commit 1cd8e88e authored Mar 27, 2013 by Johannes Berg

mac80211: check DSSS params IE length in parser



It's always just one byte, so check for that and
remove the length field from the parser struct.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

parent a6dfba84

net/mac80211/ibss.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -463,7 +463,7 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
		struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band];
		bool rates_updated = false;

		if (elems->ds_params && elems->ds_params_len == 1)
		if (elems->ds_params)
		freq = ieee80211_channel_to_frequency(elems->ds_params[0],
		band);
		else

net/mac80211/ieee80211_i.h

+0 −1

Original line number	Diff line number	Diff line
		@@ -1186,7 +1186,6 @@ struct ieee802_11_elems {
		/* length of them, respectively */
		u8 ssid_len;
		u8 supp_rates_len;
		u8 ds_params_len;
		u8 tim_len;
		u8 challenge_len;
		u8 rsn_len;

net/mac80211/mesh.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -907,7 +907,7 @@ static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
		(!elems.rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE))
		return;

		if (elems.ds_params && elems.ds_params_len == 1)
		if (elems.ds_params)
		freq = ieee80211_channel_to_frequency(elems.ds_params[0], band);
		else
		freq = rx_status->freq;

net/mac80211/mlme.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -2695,7 +2695,7 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
		}
		}

		if (elems->ds_params && elems->ds_params_len == 1)
		if (elems->ds_params)
		freq = ieee80211_channel_to_frequency(elems->ds_params[0],
		rx_status->band);
		else

net/mac80211/util.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -739,8 +739,10 @@ u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
		elems->supp_rates_len = elen;
		break;
		case WLAN_EID_DS_PARAMS:
		if (elen >= 1)
		elems->ds_params = pos;
		elems->ds_params_len = elen;
		else
		elem_parse_failed = true;
		break;
		case WLAN_EID_TIM:
		if (elen >= sizeof(struct ieee80211_tim_ie)) {