Re: Panic after updating

On 1/11/21 6:07 PM, Matthias Apitz wrote:
> On Mon, 11 Jan 2021 17:24:39 +0100, Jakob Alvermark wrote:
>> On 1/11/21 1:14 PM, Hans Petter Selasky wrote:
>>> On 1/11/21 11:12 AM, Jakob Alvermark wrote:
>>>> Updated my Acer laptop from r367734 to main-c255666-g1790f5e654f
>>>>
>>>>
>>>> Rebooting with the newly build kernel i get this panic.
>>>>
>>>>
>>>> Fatal    trap 12: page fault while in kernel mode
>>>>
>>>> cpuid    = 1; apic id = 02
>>>> fault    virtual address     = 0x1030000
>>>> fault    code                = supervisor read data,
>>>>
>>>> instruction    pointer       = 0x20:0xffffffff809e5265
>>>> stack    pointer             = 0x28:0xffffffff8281db70
>>>> frame    pointer             = 0x28:0xffffffff8281db70
>>>> code    segment              = base 0x0, limit 0xfffff, type 0x1b
>>>> =    DPL 0, pres 1, long 1, def32 0, gran 1
>>>> processor    eflags  = interrupt enabled, resume, IOPL = 0
>>>> current    process           = 12 (irq88: xhci0)
>>>> trap    number               = 12
>>>> panic:    page fault
>>>> cpuid    = 1
>>>> time    = 2
>>>> KDB:    stack backtrace:
>>>> db_trace_self_wrapper()    at db_trace_self_wrapper+0x2b/frame
>>>> 0xffffffff8281d820
>>>> vpanic()    at vpanic+0x181/frame 0xffffffff8281d870
>>>> panic()    at panic+0x43/frame 0xffffffff8281d8d0
>>>> trap_fatal()    at trap_fatal+0x387/frame 0xffffffff8281d930
>>>> trap_pfault()    at trap_pfault+0x4f/frame 0xffffffff8281d990
>>>> trap()    at trap+0x280/frame 0xffffffff8281daa0
>>>> calltrap()    at calltrap+0x8/frame 0xffffffff8281daa0
>>>> ---    trap 0xc, rip = 0xffffffff809e5265, rsp = 0xffffffff8281db70,
>>>> rbp = 0xffffffff8281db70 ---
>>>> usbd_get_page()    at usbd_get_page+0x65/frame 0xffffffff8281db70
>>>> xhci_interrupt_poll()    at xhci_interrupt_poll+0x29/frame
>>>> 0xffffffff8281dc20
>>>> xhci_interrupt()    at xhci_interrupt+0x11a/frame 0xffffffff8281dc60
>>>> ithread_loop()    at ithread_loop+0x24f/frame 0xffffffff8281dcf0
>>>> fork_exit()    at fork_exit+0x7e/frame 0xffffffff8281dd30
>>>> fork_trampoline()    at fork_trampoline+0xe/frame 0xffffffff8281dd30
>>>> ---    trap 0, rip = 0, rsp = 0, rbp = 0 ---
>>>> KDB:    enter: panic
>>>>
>>>>
>>>> Any help appreciated.
>>> Hi,
>>>
>>> If you could bi-sect that panic, would be great.
>>>
>>> Else install gdb from ports and run:
>>>
>>> kgdb101
>>>
>>> info line *(usbd_get_page+0x65)
>>>
>>>
>> Having just learned how to bisect (thanks Warner for the mini primer)
>> this is the result:
>>
>> de0b2d4f47bad36025dcf52755ce76cca6e715d9 is the first bad commit
>>
>> Jakob
>>
> Can you please share this mini primer or a link to it. TIA
>
> Matthias

Absolutely!

https://github.com/bsdimp/freebsd-git-docs/blob/main/mini-primer.md


Jakob