Re: [PATCH v2] thermal: Fix a NULL pointer dereference
From: Daniel Lezcano
Date: Tue Oct 19 2021 - 03:35:35 EST
On 19/10/2021 03:21, Subbaraman Narayanamurthy wrote:
> On 10/8/21 12:50 PM, Subbaraman Narayanamurthy wrote:
>> On 10/6/21 4:08 AM, Daniel Lezcano wrote:
[ ... ]
>> /sys/devices/virtual/thermal/thermal_zone87 # echo 120000 > trip_point_0_temp
>> [ 184.290964][ T211] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020
>> [ 184.300896][ T211] Mem abort info:
>> [ 184.304486][ T211] ESR = 0x96000006
>> [ 184.308348][ T211] EC = 0x25: DABT (current EL), IL = 32 bits
>> [ 184.314531][ T211] SET = 0, FnV = 0
>> [ 184.318384][ T211] EA = 0, S1PTW = 0
>> [ 184.322323][ T211] Data abort info:
>> [ 184.325993][ T211] ISV = 0, ISS = 0x00000006
>> [ 184.330655][ T211] CM = 0, WnR = 0
>> [ 184.334425][ T211] user pgtable: 4k pages, 39-bit VAs, pgdp=000000081a7a2000
>> [ 184.341750][ T211] [0000000000000020] pgd=000000081a7a7003, p4d=000000081a7a7003, pud=000000081a7a7003, pmd=0000000000000000
>> [ 184.353359][ T211] Internal error: Oops: 96000006 [#1] PREEMPT SMP
>> [ 184.359797][ T211] Dumping ftrace buffer:
>> [ 184.364001][ T211] (ftrace buffer empty)
>>
>> Hope this helps.
>
> Hi Daniel,
> Have you got a chance to look at this?
Hi Subbaraman,
Actually, I think the root problem is the thermal zone is showing up
while there is no sensor associated with it. You can read the
temperature and get a kernel warning also.
That's what should be fixed IMO.
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