| Message ID | 20171210195159.7454-1-nicolas.iooss_linux@m4x.org |
|---|---|
| State | Awaiting Upstream, archived |
| Delegated to: | David Miller |
| Headers | show |
| Series | [1/1] rtlwifi: always initialize variables given to RT_TRACE() | expand |
On 12/10/2017 01:51 PM, Nicolas Iooss wrote: > In rtl_rx_ampdu_apply(), when rtlpriv->cfg->ops->get_btc_status() > returns false, RT_TRACE() is called with the values of variables > reject_agg and agg_size, which have not been initialized. > > Always initialize these variables in order to prevent using > uninitialized values. > > This issue has been found with clang. The compiler reported: > > drivers/net/wireless/realtek/rtlwifi/base.c:1665:6: error: variable > 'agg_size' is used uninitialized whenever 'if' condition is false > [-Werror,-Wsometimes-uninitialized] > if (rtlpriv->cfg->ops->get_btc_status()) > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > drivers/net/wireless/realtek/rtlwifi/base.c:1671:31: note: > uninitialized use occurs here > reject_agg, ctrl_agg_size, agg_size); > ^~~~~~~~ > > drivers/net/wireless/realtek/rtlwifi/base.c:1665:6: error: variable > 'reject_agg' is used uninitialized whenever 'if' condition > is false [-Werror,-Wsometimes-uninitialized] > if (rtlpriv->cfg->ops->get_btc_status()) > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > drivers/net/wireless/realtek/rtlwifi/base.c:1671:4: note: > uninitialized use occurs here > reject_agg, ctrl_agg_size, agg_size); > ^~~~~~~~~~ > > Fixes: 2635664e6e4a ("rtlwifi: Add rx ampdu cfg for btcoexist.") > Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org> Looks good. Acked-by: Larry Finger <Larry.Finger@lwfinger.net> Thanks, Larry > --- > drivers/net/wireless/realtek/rtlwifi/base.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/net/wireless/realtek/rtlwifi/base.c b/drivers/net/wireless/realtek/rtlwifi/base.c > index cad2272ae21b..704741d6f495 100644 > --- a/drivers/net/wireless/realtek/rtlwifi/base.c > +++ b/drivers/net/wireless/realtek/rtlwifi/base.c > @@ -1726,7 +1726,7 @@ int rtl_tx_agg_oper(struct ieee80211_hw *hw, > void rtl_rx_ampdu_apply(struct rtl_priv *rtlpriv) > { > struct rtl_btc_ops *btc_ops = rtlpriv->btcoexist.btc_ops; > - u8 reject_agg, ctrl_agg_size = 0, agg_size; > + u8 reject_agg = 0, ctrl_agg_size = 0, agg_size = 0; > > if (rtlpriv->cfg->ops->get_btc_status()) > btc_ops->btc_get_ampdu_cfg(rtlpriv, &reject_agg, >
Nicolas Iooss <nicolas.iooss_linux@m4x.org> wrote: > In rtl_rx_ampdu_apply(), when rtlpriv->cfg->ops->get_btc_status() > returns false, RT_TRACE() is called with the values of variables > reject_agg and agg_size, which have not been initialized. > > Always initialize these variables in order to prevent using > uninitialized values. > > This issue has been found with clang. The compiler reported: > > drivers/net/wireless/realtek/rtlwifi/base.c:1665:6: error: variable > 'agg_size' is used uninitialized whenever 'if' condition is false > [-Werror,-Wsometimes-uninitialized] > if (rtlpriv->cfg->ops->get_btc_status()) > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > drivers/net/wireless/realtek/rtlwifi/base.c:1671:31: note: > uninitialized use occurs here > reject_agg, ctrl_agg_size, agg_size); > ^~~~~~~~ > > drivers/net/wireless/realtek/rtlwifi/base.c:1665:6: error: variable > 'reject_agg' is used uninitialized whenever 'if' condition > is false [-Werror,-Wsometimes-uninitialized] > if (rtlpriv->cfg->ops->get_btc_status()) > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > drivers/net/wireless/realtek/rtlwifi/base.c:1671:4: note: > uninitialized use occurs here > reject_agg, ctrl_agg_size, agg_size); > ^~~~~~~~~~ > > Fixes: 2635664e6e4a ("rtlwifi: Add rx ampdu cfg for btcoexist.") > Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org> Patch applied to wireless-drivers-next.git, thanks. e4779162f737 rtlwifi: always initialize variables given to RT_TRACE()
diff --git a/drivers/net/wireless/realtek/rtlwifi/base.c b/drivers/net/wireless/realtek/rtlwifi/base.c index cad2272ae21b..704741d6f495 100644 --- a/drivers/net/wireless/realtek/rtlwifi/base.c +++ b/drivers/net/wireless/realtek/rtlwifi/base.c @@ -1726,7 +1726,7 @@ int rtl_tx_agg_oper(struct ieee80211_hw *hw, void rtl_rx_ampdu_apply(struct rtl_priv *rtlpriv) { struct rtl_btc_ops *btc_ops = rtlpriv->btcoexist.btc_ops; - u8 reject_agg, ctrl_agg_size = 0, agg_size; + u8 reject_agg = 0, ctrl_agg_size = 0, agg_size = 0; if (rtlpriv->cfg->ops->get_btc_status()) btc_ops->btc_get_ampdu_cfg(rtlpriv, &reject_agg,
In rtl_rx_ampdu_apply(), when rtlpriv->cfg->ops->get_btc_status() returns false, RT_TRACE() is called with the values of variables reject_agg and agg_size, which have not been initialized. Always initialize these variables in order to prevent using uninitialized values. This issue has been found with clang. The compiler reported: drivers/net/wireless/realtek/rtlwifi/base.c:1665:6: error: variable 'agg_size' is used uninitialized whenever 'if' condition is false [-Werror,-Wsometimes-uninitialized] if (rtlpriv->cfg->ops->get_btc_status()) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/realtek/rtlwifi/base.c:1671:31: note: uninitialized use occurs here reject_agg, ctrl_agg_size, agg_size); ^~~~~~~~ drivers/net/wireless/realtek/rtlwifi/base.c:1665:6: error: variable 'reject_agg' is used uninitialized whenever 'if' condition is false [-Werror,-Wsometimes-uninitialized] if (rtlpriv->cfg->ops->get_btc_status()) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/realtek/rtlwifi/base.c:1671:4: note: uninitialized use occurs here reject_agg, ctrl_agg_size, agg_size); ^~~~~~~~~~ Fixes: 2635664e6e4a ("rtlwifi: Add rx ampdu cfg for btcoexist.") Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org> --- drivers/net/wireless/realtek/rtlwifi/base.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)