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| author | Luciano Coelho <luciano.coelho@nokia.com> | 2009-07-03 08:25:08 +0300 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-07-07 12:55:28 -0400 |
| commit | 3938b45c1c75e53d45eb65ac253f12e86239c9ba (patch) | |
| tree | 9653bd914d6e117c4057f75d65ba61e30e6afa99 /net | |
| parent | 2dce4c2b5f0b43bd25bf9ea6ded06b7f8a54c91f (diff) | |
| download | linux-3938b45c1c75e53d45eb65ac253f12e86239c9ba.tar.gz linux-3938b45c1c75e53d45eb65ac253f12e86239c9ba.tar.bz2 linux-3938b45c1c75e53d45eb65ac253f12e86239c9ba.zip | |
mac80211: minstrel: avoid accessing negative indices in rix_to_ndx()
If rix is not found in mi->r[], i will become -1 after the loop. This value
is eventually used to access arrays, so we were accessing arrays with a
negative index, which is obviously not what we want to do. This patch fixes
this potential problem.
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
Acked-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/mac80211/rc80211_minstrel.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/mac80211/rc80211_minstrel.c b/net/mac80211/rc80211_minstrel.c index b218b98fba7f..37771abd8f5a 100644 --- a/net/mac80211/rc80211_minstrel.c +++ b/net/mac80211/rc80211_minstrel.c @@ -66,7 +66,7 @@ rix_to_ndx(struct minstrel_sta_info *mi, int rix) for (i = rix; i >= 0; i--) if (mi->r[i].rix == rix) break; - WARN_ON(mi->r[i].rix != rix); + WARN_ON(i < 0); return i; } @@ -181,6 +181,9 @@ minstrel_tx_status(void *priv, struct ieee80211_supported_band *sband, break; ndx = rix_to_ndx(mi, ar[i].idx); + if (ndx < 0) + continue; + mi->r[ndx].attempts += ar[i].count; if ((i != IEEE80211_TX_MAX_RATES - 1) && (ar[i + 1].idx < 0)) |