linux-kernel - RE: [PATCH][next] rtlwifi: rtl8192de: Fix uninitialized variable place

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Date:   Mon, 30 Aug 2021 02:00:46 +0000
From:   Pkshih <pkshih@...ltek.com>
To:     Colin King <colin.king@...onical.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH][next] rtlwifi: rtl8192de: Fix uninitialized variable place


> -----Original Message-----
> From: Colin King [mailto:colin.king@...onical.com]
> Sent: Monday, August 30, 2021 2:05 AM
> To: Pkshih; Kalle Valo; David S . Miller; Jakub Kicinski; linux-wireless@...r.kernel.org;
> netdev@...r.kernel.org
> Cc: kernel-janitors@...r.kernel.org; linux-kernel@...r.kernel.org
> Subject: [PATCH][next] rtlwifi: rtl8192de: Fix uninitialized variable place
> 
> From: Colin Ian King <colin.king@...onical.com>
> 
> In the case where chnl <= 14 variable place is not initialized and
> the function returns an uninitialized value. This fixes an earlier
> cleanup where I introduced this bug. My bad.
> 
> Addresses-Coverity: ("Uninitialized scalar variable")
> Fixes: 369956ae5720 ("rtlwifi: rtl8192de: Remove redundant variable initializations")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
> ---
>  drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c
> b/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c
> index 8ae69d914312..b32fa7a75f17 100644
> --- a/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c
> +++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c
> @@ -896,7 +896,7 @@ static void _rtl92d_ccxpower_index_check(struct ieee80211_hw *hw,
> 
>  static u8 _rtl92c_phy_get_rightchnlplace(u8 chnl)
>  {
> -	u8 place;
> +	u8 place = chnl;
> 
>  	if (chnl > 14) {
>  		for (place = 14; place < sizeof(channel5g); place++) {

Nathan Chancellor has sent a patch [1] to fix this, and the patch 
has been merged.

[1] https://patchwork.kernel.org/project/linux-wireless/patch/20210823222014.764557-1-nathan@kernel.org/

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