v6.0-rc6 - arm64 / rock960 : kernel panic

[Daniel Lezcano]

On 24/09/2022 20:01, Michael Nazzareno Trimarchi wrote:
> On Sat, Sep 24, 2022 at 7:58 PM Michael Nazzareno Trimarchi
> <michael at amarulasolutions.com> wrote:
>>
>> Hi Daniel
>>
>> On Sat, Sep 24, 2022 at 7:43 PM Daniel Lezcano
>> <daniel.lezcano at linaro.org> wrote:
>>>
>>> Hi,
>>>
>>> there is a kernel panic on a rock960 board:
>>>
>>> After git bisecting, I have:
>>>
>>> commit 14facbc1871ae15404666747b5319c08e04b875a
>>> Merge: f5c97da8037b 32346491ddf2
>>> Author: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
>>> Date:   Mon Jul 11 08:32:58 2022 +0200
>>>
>>>       Merge 5.19-rc6 into char-misc-next
>>>
>>>       We need the misc driver fixes in here as well.
>>>
>>>       Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
>>>
>>> Any clue?
>>
>> That code receive 3-4 commits for one fix
>>
>> diff --git a/sound/soc/rockchip/rockchip_i2s.c
>> b/sound/soc/rockchip/rockchip_i2s.c
>> index f5f3540a9e18..a32a45b09b03 100644
>> --- a/sound/soc/rockchip/rockchip_i2s.c
>> +++ b/sound/soc/rockchip/rockchip_i2s.c
>> @@ -803,7 +803,7 @@ static int rockchip_i2s_probe(struct platform_device *pdev)
>>
>>          i2s->bclk_ratio = 64;
>>          i2s->pinctrl = devm_pinctrl_get(&pdev->dev);
>> -       if (!IS_ERR(i2s->pinctrl)) {
>> +       if (!IS_ERR_OR_NULL(i2s->pinctrl)) {
>>                  i2s->bclk_on = pinctrl_lookup_state(i2s->pinctrl, "bclk_on");
>>                  if (!IS_ERR_OR_NULL(i2s->bclk_on)) {
>>                          i2s->bclk_off =
>> pinctrl_lookup_state(i2s->pinctrl, "bclk_off");
> 
> I don't sure if you can get null from there, but you have two
> lookup_state on that function


Hmm, actually, I think it is not the same kernel panic I'm observing on 
v6.0-rc6.

I've been puzzled by different kernel panics from different issues when 
git bisecting.

The one happening is:

[    2.471037] rk808-rtc rk808-rtc: setting system clock to 
2022-09-24T18:41:07 UTC (1664044867)
[    2.485859] usbcore: registered new interface driver uvcvideo
[    3.726846] Unable to handle kernel execute from non-executable 
memory at virtual address ffff80000a516530
[    3.728032] Mem abort info:
[    3.728308]   ESR = 0x000000008600000f
[    3.728667]   EC = 0x21: IABT (current EL), IL = 32 bits
[    3.729169]   SET = 0, FnV = 0
[    3.729466]   EA = 0, S1PTW = 0
[    3.729770]   FSC = 0x0f: level 3 permission fault
[    3.730223] swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000005f42000
[    3.730846] [ffff80000a516530] pgd=10000000f7fff003, 
p4d=10000000f7fff003, pud=10000000f7ffe003, pmd=10000000f7ff9003, 
pte=0078000006516f03
[    3.732063] Internal error: Oops: 8600000f [#1] PREEMPT SMP
[    3.732588] Modules linked in:
[    3.732918] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.0.0-rc1+ #730
[    3.733532] Hardware name: 96boards Rock960 (DT)
[    3.733971] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS 
BTYPE=--)
[    3.734635] pc : extcon_dev_list+0x0/0x10
[    3.735056] lr : call_timer_fn.constprop.0+0x24/0x80
[    3.735551] sp : ffff80000a733ab0
[    3.735869] x29: ffff80000a733ab0 x28: 0000000000000005 x27: 
ffff80000a516530
[    3.736574] x26: ffff80000a3779c0 x25: ffff0000f776dde8 x24: 
ffff80000a733b40
[    3.737277] x23: 0000000000000000 x22: dead000000000122 x21: 
0000000000000101
[    3.737977] x20: ffff000000644600 x19: ffff80000a516530 x18: 
ffffffffffffffff
[    3.738677] x17: ffff8000ed713000 x16: ffff80000800c000 x15: 
0000000000004000
[    3.739377] x14: 0000000000000000 x13: 0000000000000000 x12: 
0000000000000000
[    3.740073] x11: 00000000000000b7 x10: ffff8000ed713000 x9 : 
ffff0000f776de30
[    3.740771] x8 : 0000000000000001 x7 : ffffffffffffffff x6 : 
0000000000000000
[    3.741469] x5 : 0000000000000000 x4 : 0000000000000000 x3 : 
0000000000000200
[    3.742164] x2 : 0000000000000200 x1 : ffff80000a516530 x0 : 
ffff0000007e7310
[    3.742865] Call trace:
[    3.743107]  extcon_dev_list+0x0/0x10
[    3.743477]  __run_timers.part.0+0x1f0/0x234
[    3.743908]  run_timer_softirq+0x3c/0x7c
[    3.744306]  _stext+0x124/0x2a4
[    3.744627]  __irq_exit_rcu+0xcc/0xfc
[    3.745008]  irq_exit_rcu+0x10/0x20
[    3.745372]  el1_interrupt+0x38/0x70
[    3.745733]  el1h_64_irq_handler+0x18/0x24
[    3.746140]  el1h_64_irq+0x64/0x68
[    3.746484]  arch_cpu_idle+0x18/0x2c
[    3.746843]  default_idle_call+0x34/0x70
[    3.747243]  do_idle+0x240/0x2bc
[    3.747576]  cpu_startup_entry+0x24/0x30
[    3.747969]  secondary_start_kernel+0x12c/0x140
[    3.748421]  __secondary_switched+0xb0/0xb4
[    3.748879] Code: 0a516520 ffff8000 0a516520 ffff8000 (007e7320)
[    3.749461] ---[ end trace 0000000000000000 ]---
[    3.749911] Kernel panic - not syncing: Oops: Fatal exception in 
interrupt
[    3.750548] SMP: stopping secondary CPUs
[    3.751094] Kernel Offset: 0x80000 from 0xffff800008000000
[    3.751609] PHYS_OFFSET: 0x0
[    3.751889] CPU features: 0x2000,0824f021,00001082
[    3.752354] Memory Limit: none
[    3.752655] ---[ end Kernel panic - not syncing: Oops: Fatal 
exception in interrupt ]---



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