Re: Random reboots on ODROID-N2+

[Stefan Agner <stefan@agner.ch>]

Hi Martin,

On 2021-05-17 23:09, Martin Blumenstingl wrote:
> Hi Stefan,
> 
> On Mon, May 17, 2021 at 11:14 AM Stefan Agner <stefan@agner.ch> wrote:
>>
>> Hi,
>>
>> We are currently testing a new release using Linux 5.10.33. I've
>> received since several reports of random reboots every couple of days.
>> Unfortunately the log (journald) doesn't show anything, just a hard cut
>> at some point.
> I'm sorry to hear that some things are not working right
> 
> [...]
>> [202983.988187] Hardware name: Hardkernel ODROID-N2Plus (DT)
>> [202983.988188] Call trace:
>> [202983.988188]  dump_backtrace+0x0/0x1a0
>> [202983.988189]  show_stack+0x18/0x70
>> [202983.988190]  dump_stack+0xd0/0x12c
>> [202983.988190]  panic+0x170/0x338
>> [202983.988191]  nmi_panic+0x8c/0x90
>> [202983.988191]  arm64_serror_panic+0x78/0x84
>> [202983.988192]  do_serror+0x38/0xa0
>> [202983.988193]  el1_error+0x88/0x108
>> [202983.988193]  udp_send_skb.isra.0+0x178/0x390
>> [202983.988194]  udp_sendmsg+0x7c8/0x9c0
>> [202983.988194]  inet_sendmsg+0x44/0x70
>> [202983.988195]  sock_sendmsg+0x4c/0x60
>> [202983.988196]  __sys_sendto+0xd0/0x140
>> [202983.988196]  __arm64_sys_sendto+0x28/0x40
>> [202983.988197]  el0_svc_common.constprop.0+0x78/0x1a0
>> [202983.988197]  do_el0_svc+0x24/0x90
>> [202983.988198]  el0_svc+0x14/0x20
>> [202983.988199]  el0_sync_handler+0xb0/0xc0
>> [202983.988199]  el0_sync+0x178/0x180
>> [202983.988211] SMP: stopping secondary CPUs
>> [202983.988212] Kernel Offset: disabled
>> [202983.988212] CPU features: 0x0240002,61082004
>> [202983.988213] Memory Limit: none
> that looks weird
> 
>> Anyone observed such an issue? I am pretty sure that this is a new issue
>> as we have many installations using Linux 5.9.16 running stable on the
>> same hardware,.
> I haven't but I am currently trying to hunt down a (probably
> unrelated) Ethernet issue on an older Meson8m2 SoC currently.
> All Amlogic Meson SoCs use a DWMAC IP for Ethernet connectivity plus
> there's a little bit of "glue" IP for the xMII connecting to the SoC's
> IO pads
> 
> I think it's a good idea to involve the netdev and (probably even more
> important) stmmac maintainers.
> Anything skb related is handled by the stmmac driver.
> So I am hoping that someone with expertise in that area can give any
> hints for debugging or reproducing this.

Ok I'll do that, I currently wait to see the same trace a second time,
just to make sure its really caused by that code path always.

--
Stefan

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