linux-kernel - RE: [PATCH] hwmon: (amd_energy) fix allocation of hwmon_channel

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Message-ID: <DM6PR12MB4388E1D56BA6983DE71D2750E8AE0@DM6PR12MB4388.namprd12.prod.outlook.com>
Date:   Fri, 8 Jan 2021 06:19:42 +0000
From:   "Chatradhi, Naveen Krishna" <NaveenKrishna.Chatradhi@....com>
To:     Guenter Roeck <linux@...ck-us.net>,
        David Arcari <darcari@...hat.com>,
        "linux-hwmon@...r.kernel.org" <linux-hwmon@...r.kernel.org>
CC:     Jean Delvare <jdelvare@...e.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Subject: RE: [PATCH] hwmon: (amd_energy) fix allocation of hwmon_channel_info
 config

[AMD Official Use Only - Approved for External Use]

Hi Guenter,

>> No, because you are not in the approval path (you did not send the patch to me). Reviewed-by: or Acked-by: would be more appropriate.

Got it, my mistake, please use 
Acked-by: Naveen Krishna Chatradhi <nchatrad@....com>

Regards,
Naveenk

-----Original Message-----
From: Guenter Roeck <groeck7@...il.com> On Behalf Of Guenter Roeck
Sent: Friday, January 8, 2021 11:47 AM
To: Chatradhi, Naveen Krishna <NaveenKrishna.Chatradhi@....com>; David Arcari <darcari@...hat.com>; linux-hwmon@...r.kernel.org
Cc: Jean Delvare <jdelvare@...e.com>; linux-kernel@...r.kernel.org; stable@...r.kernel.org
Subject: Re: [PATCH] hwmon: (amd_energy) fix allocation of hwmon_channel_info config

[CAUTION: External Email]

On 1/7/21 9:49 PM, Chatradhi, Naveen Krishna wrote:
> [AMD Official Use Only - Approved for External Use]
>
> Hi David,
>
> Thank you for noticing and submitting a fix. You may use
> Signed-off-by: Naveen Krishna Chatradhi <nchatrad@....com>
>

No, because you are not in the approval path (you did not send the patch to me). Reviewed-by: or Acked-by: would be more appropriate.

Genter

> Regards,
> Naveenk
>
> -----Original Message-----
> From: David Arcari <darcari@...hat.com>
> Sent: Thursday, January 7, 2021 8:17 PM
> To: linux-hwmon@...r.kernel.org
> Cc: David Arcari <darcari@...hat.com>; Chatradhi, Naveen Krishna 
> <NaveenKrishna.Chatradhi@....com>; Jean Delvare <jdelvare@...e.com>; 
> Guenter Roeck <linux@...ck-us.net>; linux-kernel@...r.kernel.org; 
> stable@...r.kernel.org
> Subject: [PATCH] hwmon: (amd_energy) fix allocation of 
> hwmon_channel_info config
>
> [CAUTION: External Email]
>
> hwmon, specifically hwmon_num_channel_attrs, expects the config array in the hwmon_channel_info structure to be terminated by a zero entry.  amd_energy does not honor this convention.  As result, a KASAN warning is possible.  Fix this by adding an additional entry and setting it to zero.
>
> Fixes: 8abee9566b7e ("hwmon: Add amd_energy driver to report energy 
> counters")
>
> Signed-off-by: David Arcari <darcari@...hat.com>
> Cc: Naveen Krishna Chatradhi <nchatrad@....com> [naveenk:] 
> Signed-off-by: Naveen Krishna Chatradhi <nchatrad@....com>
> Cc: Jean Delvare <jdelvare@...e.com>
> Cc: Guenter Roeck <linux@...ck-us.net>
> Cc: linux-kernel@...r.kernel.org
> Cc: stable@...r.kernel.org
> ---
>  drivers/hwmon/amd_energy.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/hwmon/amd_energy.c b/drivers/hwmon/amd_energy.c 
> index 9b306448b7a0..822c2e74b98d 100644
> --- a/drivers/hwmon/amd_energy.c
> +++ b/drivers/hwmon/amd_energy.c
> @@ -222,7 +222,7 @@ static int amd_create_sensor(struct device *dev,
>          */
>         cpus = num_present_cpus() / num_siblings;
>
> -       s_config = devm_kcalloc(dev, cpus + sockets,
> +       s_config = devm_kcalloc(dev, cpus + sockets + 1,
>                                 sizeof(u32), GFP_KERNEL);
>         if (!s_config)
>                 return -ENOMEM;
> @@ -254,6 +254,7 @@ static int amd_create_sensor(struct device *dev,
>                         scnprintf(label_l[i], 10, "Esocket%u", (i - cpus));
>         }
>
> +       s_config[i] = 0;
>         return 0;
>  }
>
> --
> 2.18.1
>