Re: 14-CURRENT Kernel Panic due to USB hub?

I bisected the detached messages back to 601ee53858f6 [1]. If I revert this change I no longer see this on the console.

I am also unable to reproduce the panic with this change reverted. As the panic can be difficult to reproduce I am unsure if reverting this change is enough to fix it, or if it’s just making it less likely to be triggered.

Andrew

[1] https://cgit.freebsd.org/src/commit/?id=601ee53858f6

> On 23 Nov 2021, at 17:34, Andrew Turner <andrew@fubar.geek.nz> wrote:
> 
> Can you create a bug for this in bugzilla so we can keep track of it?
> 
> Andrew
> 
>> On 21 Nov 2021, at 07:18, Daniel Morante via freebsd-arm <freebsd-arm@freebsd.org> wrote:
>> 
>> Here's the bt:
>> 
>> ugen0.2: <Generic 4-Port USB 3.0 Hub> at usbus0 (disconnected)
>> uhub5: at uhub0, port 1, addr 1 (disconnected)
>> uhub5: detached
>> ugen0.2: <Generic 4-Port USB 3.0 Hub> at usbus0
>> uhub5 numa-domain 0 on uhub0
>> uhub5: <Interrupt In Interface> on usbus0
>> uhub5: 4 ports with 4 removable, self powered
>> ugen0.2: <Generic 4-Port USB 3.0 Hub> at usbus0 (disconnected)
>> uhub5: at uhub0, port 1, addr 1 (disconnected)
>> uhub5: detached
>> panic: data abort with spinlock held
>> cpuid = 108
>> time = 1637478997
>> KDB: stack backtrace:
>> db_trace_self() at db_trace_self
>> KDB: enter: panic
>> [ thread pid 11 tid 100111 ]
>> Stopped at      kdb_enter+0x44: undefined       f901411f
>> db> bt
>> Tracing pid 11 tid 100111 td 0xffffa00005619580
>> db_trace_self() at db_trace_self
>> db>
>> 
>> On 11/12/2021 5:52 AM, Hans Petter Selasky wrote:
>>> On 11/12/21 00:43, Daniel Morante via freebsd-arm wrote:
>>>> ugen0.2: <Generic 4-Port USB 3.0 Hub> at usbus0 (disconnected)
>>>> uhub5: at uhub0, port 1, addr 1 (disconnected)
>>>> uhub5: detached
>>>> ugen0.2: <Generic 4-Port USB 3.0 Hub> at usbus0
>>>> uhub5 numa-domain 0 on uhub0
>>>> uhub5: <Interrupt In Interface> on usbus0
>>>> uhub5: 4 ports with 4 removable, self powered
>>>> 
>>>> I suspect these problems are caused by the above detaching/reattaching.
>>> 
>>> Can you type "bt" in the panic prompt?
>>> 
>>> --HPS
>>> 
> 
>