netdev - Re: [PATCH net-next] tg3: fix bug caused by uninitialized variable

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Message-ID: <CALs4sv2HJn2vV8tScAcv_WSEvigO+VuHSmPr-Q3Hsxc_eSVigQ@mail.gmail.com>
Date: Fri, 9 Feb 2024 12:57:47 +0530
From: Pavan Chebbi <pavan.chebbi@...adcom.com>
To: Heiner Kallweit <hkallweit1@...il.com>
Cc: Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
	David Miller <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
	Russell King - ARM Linux <linux@...linux.org.uk>, Andrew Lunn <andrew@...n.ch>, 
	Michael Chan <mchan@...adcom.com>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, 
	"Aithal, Srikanth" <sraithal@....com>
Subject: Re: [PATCH net-next] tg3: fix bug caused by uninitialized variable

On Fri, Feb 9, 2024 at 12:17 PM Heiner Kallweit <hkallweit1@...il.com> wrote:
>
> The reported bug is caused by using mii_eee_cap1_mod_linkmode_t()
> with an uninitialized bitmap. Fix this by zero-initializing the
> struct containing the bitmap.
>
> Fixes: 9bc791341bc9a5c22b ("tg3: convert EEE handling to use linkmode bitmaps")
> Reported-by: Srikanth Aithal <sraithal@....com>
> Tested-by: Srikanth Aithal <sraithal@....com>
> Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
> ---
>  drivers/net/ethernet/broadcom/tg3.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
> index 50f674031..7d0a2f5f3 100644
> --- a/drivers/net/ethernet/broadcom/tg3.c
> +++ b/drivers/net/ethernet/broadcom/tg3.c
> @@ -4616,7 +4616,7 @@ static int tg3_init_5401phy_dsp(struct tg3 *tp)
>
>  static bool tg3_phy_eee_config_ok(struct tg3 *tp)
>  {
> -       struct ethtool_keee eee;
> +       struct ethtool_keee eee = {};
>
>         if (!(tp->phy_flags & TG3_PHYFLG_EEE_CAP))
>                 return true;
> --
> 2.43.0
>
>
Reviewed-by: Pavan Chebbi <pavan.chebbi@...adcom.com>
Thanks.

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