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Bug #2971

kernel 4.7: buildworld causes panic: Bad link elm 0xffffffe1c766d500 prev->next != elm

Added by peeter 6 months ago. Updated 6 months ago.

Status:
New
Priority:
Normal
Assignee:
-
Category:
-
Target version:
-
Start date:
12/21/2016
Due date:
% Done:

0%


Description

The panic happened while doing buildworld. I am not entirely sure that the panic is not caused by a hardware error since prior to the panic two CRC errors showed up in /var/log/messages. On the other hand, it seems they might not be caused by a hardware error since prior to the panic I had seen CRC errors a couple of times and reinstalling the system got rid of them. In more detail, the machine has gone the following cycle of couple of times:

1 - system has a panic (related to the kernel module I'm developing)
2 - hammer checkmap starts reporting errors occasionally
3 - then CRC errors show up /var/log/messages
4 - re-install the system and all errors vanish
5 - go back to 1

However, the last time after step 3 "make buildworld" led to this panic.

hammer-crc-error-crash.txt View (9.48 KB) peeter, 12/21/2016 03:45 AM

History

#1 Updated by sepherosa 6 months ago

I'd suggest to run memtest on your system, I'd suspect bad memory sticks.

On Wed, Dec 21, 2016 at 7:46 PM,
<> wrote:
> Issue #2971 has been reported by peeter.
>
> ----------------------------------------
> Bug #2971: kernel 4.7: buildworld causes panic: Bad link elm 0xffffffe1c766d500 prev->next != elm
> http://bugs.dragonflybsd.org/issues/2971
>
> * Author: peeter
> * Status: New
> * Priority: Normal
> * Assignee:
> * Category:
> * Target version:
> ----------------------------------------
> The panic happened while doing buildworld. I am not entirely sure that the panic is not caused by a hardware error since prior to the panic two CRC errors showed up in /var/log/messages. On the other hand, it seems they might not be caused by a hardware error since prior to the panic I had seen CRC errors a couple of times and reinstalling the system got rid of them. In more detail, the machine has gone the following cycle of couple of times:
>
> 1 - system has a panic (related to the kernel module I'm developing)
> 2 - hammer checkmap starts reporting errors occasionally
> 3 - then CRC errors show up /var/log/messages
> 4 - re-install the system and all errors vanish
> 5 - go back to 1
>
> However, the last time after step 3 "make buildworld" led to this panic.
>
>
> ---Files--------------------------------
> hammer-crc-error-crash.txt (9.48 KB)
>
>
> --
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--
Tomorrow Will Never Die

#2 Updated by peeter 6 months ago

I ran memtest86 V7.2 from a USB stick and it tested all of the 8GB RAM: so far no errors. I did one pass. Will do another four passes tomorrow when I get back to office.

#3 Updated by peeter 6 months ago

Another three passes of memtest86 on 8GB RAM: no errors. Seems RAM is fine.

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