linux-kernel - Re: [PATCH] thermal: genetlink: Fix TZ_GET

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Date:   Tue, 1 Mar 2022 21:48:52 +0100
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Nicolas Cavallari <nicolas.cavallari@...en-communications.fr>
Cc:     Amit Kucheria <amitk@...nel.org>, Zhang Rui <rui.zhang@...el.com>,
        Linux PM <linux-pm@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] thermal: genetlink: Fix TZ_GET_TRIP NULL pointer
 dereference

On 01/03/2022 16:14, Rafael J. Wysocki wrote:
> On Mon, Feb 28, 2022 at 12:04 PM Nicolas Cavallari
> <nicolas.cavallari@...en-communications.fr> wrote:
>>
>> Do not call get_trip_hyst() if the thermal zone does not define one.
>>
>> Signed-off-by: Nicolas Cavallari <nicolas.cavallari@...en-communications.fr>
>> ---
>>   drivers/thermal/thermal_netlink.c | 5 +++--
>>   1 file changed, 3 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/thermal/thermal_netlink.c b/drivers/thermal/thermal_netlink.c
>> index a16dd4d5d710..73e68cce292e 100644
>> --- a/drivers/thermal/thermal_netlink.c
>> +++ b/drivers/thermal/thermal_netlink.c
>> @@ -419,11 +419,12 @@ static int thermal_genl_cmd_tz_get_trip(struct param *p)
>>          for (i = 0; i < tz->trips; i++) {
>>
>>                  enum thermal_trip_type type;
>> -               int temp, hyst;
>> +               int temp, hyst = 0;
>>
>>                  tz->ops->get_trip_type(tz, i, &type);
>>                  tz->ops->get_trip_temp(tz, i, &temp);
>> -               tz->ops->get_trip_hyst(tz, i, &hyst);
>> +               if (tz->ops->get_trip_hyst)
>> +                       tz->ops->get_trip_hyst(tz, i, &hyst);
>>
>>                  if (nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_ID, i) ||
>>                      nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_TYPE, type) ||
>> --
> 
> Applied, but I think this needs to go into 5.17-rc, doesn't it?

Yes, correct


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