diff options
| author | Larry Finger <Larry.Finger@lwfinger.net> | 2014-03-11 03:53:10 +0400 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2014-03-13 22:05:40 +0400 |
| commit | 4e3b3bcd81776527fa6f11624d68849de8c8802e (patch) | |
| tree | 3d63e3f9080c7c13abafbfbc0514278899fa02d3 | |
| parent | 3ead0d2e220ea7ced14027336bb168bafa01b7af (diff) | |
| download | linux-4e3b3bcd81776527fa6f11624d68849de8c8802e.tar.xz | |
rtlwifi: rtl8723be: Fix array dimension problems
Commit a619d1abe20c leads to the following static checker warning:
drivers/net/wireless/rtlwifi/rtl8723be/phy.c:667 _rtl8723be_store_tx_power_by_rate()
error: buffer overflow 'rtlphy->tx_power_by_rate_offset[band]' 4 <= 5
This warning arises because the code is testing the indices for the wrong maximum
values. In addition, the tests merely putput a warning, and then procedes to
corrupt memory. With this change, any such invalid memory access is avoided.
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | drivers/net/wireless/rtlwifi/rtl8723be/phy.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/net/wireless/rtlwifi/rtl8723be/phy.c b/drivers/net/wireless/rtlwifi/rtl8723be/phy.c index cadae9bc4e3f..1575ef9ece9f 100644 --- a/drivers/net/wireless/rtlwifi/rtl8723be/phy.c +++ b/drivers/net/wireless/rtlwifi/rtl8723be/phy.c @@ -629,18 +629,22 @@ static void _rtl8723be_store_tx_power_by_rate(struct ieee80211_hw *hw, struct rtl_phy *rtlphy = &(rtlpriv->phy); u8 rate_section = _rtl8723be_get_rate_section_index(regaddr); - if (band != BAND_ON_2_4G && band != BAND_ON_5G) + if (band != BAND_ON_2_4G && band != BAND_ON_5G) { RT_TRACE(rtlpriv, COMP_POWER, PHY_TXPWR, "Invalid Band %d\n", band); + return; + } - if (rfpath > MAX_RF_PATH) + if (rfpath > TX_PWR_BY_RATE_NUM_RF) { RT_TRACE(rtlpriv, COMP_POWER, PHY_TXPWR, "Invalid RfPath %d\n", rfpath); - - if (txnum > MAX_RF_PATH) + return; + } + if (txnum > TX_PWR_BY_RATE_NUM_RF) { RT_TRACE(rtlpriv, COMP_POWER, PHY_TXPWR, "Invalid TxNum %d\n", txnum); - + return; + } rtlphy->tx_power_by_rate_offset[band][rfpath][txnum][rate_section] = data; } |