1908861f2f
debug_sta.c: ath_debug_rate_stats() error: buffer overflow 'rstats->ht_stats' 24 <= 24 Cc: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
269 lines
6.7 KiB
C
269 lines
6.7 KiB
C
/*
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* Copyright (c) 2013 Qualcomm Atheros, Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "ath9k.h"
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/*************/
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/* node_aggr */
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/*************/
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static ssize_t read_file_node_aggr(struct file *file, char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct ath_node *an = file->private_data;
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struct ath_softc *sc = an->sc;
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struct ath_atx_tid *tid;
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struct ath_atx_ac *ac;
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struct ath_txq *txq;
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u32 len = 0, size = 4096;
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char *buf;
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size_t retval;
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int tidno, acno;
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buf = kzalloc(size, GFP_KERNEL);
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if (buf == NULL)
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return -ENOMEM;
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if (!an->sta->ht_cap.ht_supported) {
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len = scnprintf(buf, size, "%s\n",
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"HT not supported");
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goto exit;
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}
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len = scnprintf(buf, size, "Max-AMPDU: %d\n",
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an->maxampdu);
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len += scnprintf(buf + len, size - len, "MPDU Density: %d\n\n",
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an->mpdudensity);
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len += scnprintf(buf + len, size - len,
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"%2s%7s\n", "AC", "SCHED");
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for (acno = 0, ac = &an->ac[acno];
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acno < IEEE80211_NUM_ACS; acno++, ac++) {
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txq = ac->txq;
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ath_txq_lock(sc, txq);
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len += scnprintf(buf + len, size - len,
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"%2d%7d\n",
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acno, ac->sched);
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ath_txq_unlock(sc, txq);
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}
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len += scnprintf(buf + len, size - len,
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"\n%3s%11s%10s%10s%10s%10s%9s%6s%8s\n",
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"TID", "SEQ_START", "SEQ_NEXT", "BAW_SIZE",
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"BAW_HEAD", "BAW_TAIL", "BAR_IDX", "SCHED", "PAUSED");
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for (tidno = 0, tid = &an->tid[tidno];
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tidno < IEEE80211_NUM_TIDS; tidno++, tid++) {
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txq = tid->ac->txq;
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ath_txq_lock(sc, txq);
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if (tid->active) {
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len += scnprintf(buf + len, size - len,
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"%3d%11d%10d%10d%10d%10d%9d%6d%8d\n",
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tid->tidno,
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tid->seq_start,
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tid->seq_next,
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tid->baw_size,
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tid->baw_head,
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tid->baw_tail,
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tid->bar_index,
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tid->sched,
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tid->paused);
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}
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ath_txq_unlock(sc, txq);
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}
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exit:
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retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
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kfree(buf);
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return retval;
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}
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static const struct file_operations fops_node_aggr = {
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.read = read_file_node_aggr,
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.open = simple_open,
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.owner = THIS_MODULE,
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.llseek = default_llseek,
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};
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/*************/
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/* node_recv */
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/*************/
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void ath_debug_rate_stats(struct ath_softc *sc,
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struct ath_rx_status *rs,
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struct sk_buff *skb)
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{
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struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
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struct ath_hw *ah = sc->sc_ah;
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struct ieee80211_rx_status *rxs;
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struct ath_rx_rate_stats *rstats;
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struct ieee80211_sta *sta;
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struct ath_node *an;
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if (!ieee80211_is_data(hdr->frame_control))
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return;
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rcu_read_lock();
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sta = ieee80211_find_sta_by_ifaddr(sc->hw, hdr->addr2, NULL);
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if (!sta)
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goto exit;
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an = (struct ath_node *) sta->drv_priv;
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rstats = &an->rx_rate_stats;
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rxs = IEEE80211_SKB_RXCB(skb);
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if (IS_HT_RATE(rs->rs_rate)) {
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if (rxs->rate_idx >= ARRAY_SIZE(rstats->ht_stats))
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goto exit;
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if (rxs->flag & RX_FLAG_40MHZ)
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rstats->ht_stats[rxs->rate_idx].ht40_cnt++;
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else
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rstats->ht_stats[rxs->rate_idx].ht20_cnt++;
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if (rxs->flag & RX_FLAG_SHORT_GI)
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rstats->ht_stats[rxs->rate_idx].sgi_cnt++;
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else
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rstats->ht_stats[rxs->rate_idx].lgi_cnt++;
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goto exit;
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}
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if (IS_CCK_RATE(rs->rs_rate)) {
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if (rxs->flag & RX_FLAG_SHORTPRE)
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rstats->cck_stats[rxs->rate_idx].cck_sp_cnt++;
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else
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rstats->cck_stats[rxs->rate_idx].cck_lp_cnt++;
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goto exit;
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}
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if (IS_OFDM_RATE(rs->rs_rate)) {
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if (ah->curchan->chan->band == IEEE80211_BAND_2GHZ)
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rstats->ofdm_stats[rxs->rate_idx - 4].ofdm_cnt++;
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else
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rstats->ofdm_stats[rxs->rate_idx].ofdm_cnt++;
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}
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exit:
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rcu_read_unlock();
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}
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#define PRINT_CCK_RATE(str, i, sp) \
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do { \
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len += scnprintf(buf + len, size - len, \
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"%11s : %10u\n", \
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str, \
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(sp) ? rstats->cck_stats[i].cck_sp_cnt : \
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rstats->cck_stats[i].cck_lp_cnt); \
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} while (0)
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#define PRINT_OFDM_RATE(str, i) \
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do { \
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len += scnprintf(buf + len, size - len, \
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"%11s : %10u\n", \
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str, \
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rstats->ofdm_stats[i].ofdm_cnt); \
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} while (0)
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static ssize_t read_file_node_recv(struct file *file, char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct ath_node *an = file->private_data;
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struct ath_softc *sc = an->sc;
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struct ath_hw *ah = sc->sc_ah;
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struct ath_rx_rate_stats *rstats;
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struct ieee80211_sta *sta = an->sta;
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enum ieee80211_band band;
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u32 len = 0, size = 4096;
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char *buf;
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size_t retval;
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int i;
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buf = kzalloc(size, GFP_KERNEL);
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if (buf == NULL)
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return -ENOMEM;
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band = ah->curchan->chan->band;
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rstats = &an->rx_rate_stats;
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if (!sta->ht_cap.ht_supported)
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goto legacy;
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len += scnprintf(buf + len, size - len,
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"%24s%10s%10s%10s\n",
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"HT20", "HT40", "SGI", "LGI");
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for (i = 0; i < 24; i++) {
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len += scnprintf(buf + len, size - len,
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"%8s%3u : %10u%10u%10u%10u\n",
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"MCS", i,
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rstats->ht_stats[i].ht20_cnt,
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rstats->ht_stats[i].ht40_cnt,
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rstats->ht_stats[i].sgi_cnt,
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rstats->ht_stats[i].lgi_cnt);
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}
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len += scnprintf(buf + len, size - len, "\n");
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legacy:
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if (band == IEEE80211_BAND_2GHZ) {
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PRINT_CCK_RATE("CCK-1M/LP", 0, false);
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PRINT_CCK_RATE("CCK-2M/LP", 1, false);
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PRINT_CCK_RATE("CCK-5.5M/LP", 2, false);
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PRINT_CCK_RATE("CCK-11M/LP", 3, false);
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PRINT_CCK_RATE("CCK-2M/SP", 1, true);
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PRINT_CCK_RATE("CCK-5.5M/SP", 2, true);
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PRINT_CCK_RATE("CCK-11M/SP", 3, true);
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}
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PRINT_OFDM_RATE("OFDM-6M", 0);
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PRINT_OFDM_RATE("OFDM-9M", 1);
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PRINT_OFDM_RATE("OFDM-12M", 2);
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PRINT_OFDM_RATE("OFDM-18M", 3);
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PRINT_OFDM_RATE("OFDM-24M", 4);
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PRINT_OFDM_RATE("OFDM-36M", 5);
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PRINT_OFDM_RATE("OFDM-48M", 6);
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PRINT_OFDM_RATE("OFDM-54M", 7);
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retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
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kfree(buf);
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return retval;
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}
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#undef PRINT_OFDM_RATE
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#undef PRINT_CCK_RATE
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static const struct file_operations fops_node_recv = {
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.read = read_file_node_recv,
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.open = simple_open,
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.owner = THIS_MODULE,
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.llseek = default_llseek,
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};
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void ath9k_sta_add_debugfs(struct ieee80211_hw *hw,
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struct ieee80211_vif *vif,
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struct ieee80211_sta *sta,
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struct dentry *dir)
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{
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struct ath_node *an = (struct ath_node *)sta->drv_priv;
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debugfs_create_file("node_aggr", S_IRUGO, dir, an, &fops_node_aggr);
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debugfs_create_file("node_recv", S_IRUGO, dir, an, &fops_node_recv);
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}
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