Nicolas Iooss <nicolas.iooss_linux@xxxxxxx> 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@xxxxxxx>
Patch applied to wireless-drivers-next.git, thanks.
e4779162f737 rtlwifi: always initialize variables given to RT_TRACE()
--
https://patchwork.kernel.org/patch/10103995/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
