On Thu, Jul 30, 2015 at 4:43 PM, Patrick O'Callaghan pocallaghan@gmail.com wrote:
On Thu, 2015-07-30 at 13:21 -0500, Ranjan Maitra wrote:
On Thu, 30 Jul 2015 18:54:02 +0100 "Patrick O'Callaghan" < pocallaghan@gmail.com> wrote:
This is happening every few minutes since I updated today:
Jul 30 18:26:21 Bree kernel: BUG: unable to handle kernel NULL pointer dereference at 0000000000000288 Jul 30 18:26:21 Bree kernel: IP: [<ffffffff8120f034>] __kmalloc_node_track_caller+0x1c4/0x320
Going to try booting the previous kernel.
This is likely a bug. Please file on BZ so that developers may know about it.
It's wierd. I rebooted with 4.0.8 (which had previously been working with no issues) and got a different bug:
Jul 30 18:54:49 Bree kernel: kernel BUG at mm/slub.c:3413! Jul 30 18:54:50 Bree kernel: invalid opcode: 0000 [#1] SMP
I rebooted again with 4.0.6 and so far it seems to be working (several hours without crashing).
I'll try updating again tomorrow before I report anything.
mm/slub.c and kmmalloc are memory related functions, so if you regress to a previously working kernel I'd say memory related. Maybe try live media and see if it happens. And start a memtest over the weekend and see if that triggers something.