From 9799218ae36910af50f002a5db1802d576fffb43 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Wed, 12 Aug 2009 17:37:52 -0700 Subject: [PATCH] Revert "libertas: Read buffer overflow" This reverts commit 57921c312e8cef72ba35a4cfe870b376da0b1b87. On request from John Linville: It has been shown to create a new problem. There is work towards a solution to that one, but it isn't a simple clean-up. Signed-off-by: David S. Miller --- drivers/net/wireless/libertas/assoc.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/libertas/assoc.c b/drivers/net/wireless/libertas/assoc.c index d6997371c27e..b9b374119033 100644 --- a/drivers/net/wireless/libertas/assoc.c +++ b/drivers/net/wireless/libertas/assoc.c @@ -1,7 +1,6 @@ /* Copyright (C) 2006, Red Hat, Inc. */ #include -#include #include #include #include @@ -44,21 +43,21 @@ static int get_common_rates(struct lbs_private *priv, u16 *rates_size) { u8 *card_rates = lbs_bg_rates; + size_t num_card_rates = sizeof(lbs_bg_rates); int ret = 0, i, j; - u8 tmp[(ARRAY_SIZE(lbs_bg_rates) - 1) * (*rates_size - 1)]; + u8 tmp[30]; size_t tmp_size = 0; /* For each rate in card_rates that exists in rate1, copy to tmp */ - for (i = 0; i < ARRAY_SIZE(lbs_bg_rates) && card_rates[i]; i++) { - for (j = 0; j < *rates_size && rates[j]; j++) { + for (i = 0; card_rates[i] && (i < num_card_rates); i++) { + for (j = 0; rates[j] && (j < *rates_size); j++) { if (rates[j] == card_rates[i]) tmp[tmp_size++] = card_rates[i]; } } lbs_deb_hex(LBS_DEB_JOIN, "AP rates ", rates, *rates_size); - lbs_deb_hex(LBS_DEB_JOIN, "card rates ", card_rates, - ARRAY_SIZE(lbs_bg_rates)); + lbs_deb_hex(LBS_DEB_JOIN, "card rates ", card_rates, num_card_rates); lbs_deb_hex(LBS_DEB_JOIN, "common rates", tmp, tmp_size); lbs_deb_join("TX data rate 0x%02x\n", priv->cur_rate); @@ -70,7 +69,10 @@ static int get_common_rates(struct lbs_private *priv, lbs_pr_alert("Previously set fixed data rate %#x isn't " "compatible with the network.\n", priv->cur_rate); ret = -1; + goto done; } + ret = 0; + done: memset(rates, 0, *rates_size); *rates_size = min_t(int, tmp_size, *rates_size); @@ -320,7 +322,7 @@ static int lbs_associate(struct lbs_private *priv, rates = (struct mrvl_ie_rates_param_set *) pos; rates->header.type = cpu_to_le16(TLV_TYPE_RATES); memcpy(&rates->rates, &bss->rates, MAX_RATES); - tmplen = min_t(u16, ARRAY_SIZE(rates->rates), MAX_RATES); + tmplen = MAX_RATES; if (get_common_rates(priv, rates->rates, &tmplen)) { ret = -1; goto done; @@ -596,7 +598,7 @@ static int lbs_adhoc_join(struct lbs_private *priv, /* Copy Data rates from the rates recorded in scan response */ memset(cmd.bss.rates, 0, sizeof(cmd.bss.rates)); - ratesize = min_t(u16, ARRAY_SIZE(cmd.bss.rates), MAX_RATES); + ratesize = min_t(u16, sizeof(cmd.bss.rates), MAX_RATES); memcpy(cmd.bss.rates, bss->rates, ratesize); if (get_common_rates(priv, cmd.bss.rates, &ratesize)) { lbs_deb_join("ADHOC_JOIN: get_common_rates returned error.\n"); -- 2.39.2