Re: copy_huge_page: unable to handle kernel NULL pointer dereference at 0000000000000008

[Marcelo Tosatti <mtosatti@redhat.com>]

On Wed, Feb 04, 2015 at 08:34:04PM +0400, Andrey Korolyov wrote:
> >Hi,
> >
> >I've seen the problem quite a few times.  Before spending more time on
> >it, I'd like to have a quick check here to see if anyone ever saw the
> >same problem?  Hope it is a relevant question with this mail list.
> >
> >
> >Jul  2 11:08:21 arno-3 kernel: [ 2165.078623] BUG: unable to handle
> >kernel NULL pointer dereference at 0000000000000008
> >Jul  2 11:08:21 arno-3 kernel: [ 2165.078916] IP: [<ffffffff8118d0fa>]
> >copy_huge_page+0x8a/0x2a0
> >Jul  2 11:08:21 arno-3 kernel: [ 2165.079128] PGD 0
> >Jul  2 11:08:21 arno-3 kernel: [ 2165.079198] Oops: 0000 [#1] SMP
> >Jul  2 11:08:21 arno-3 kernel: [ 2165.079319] Modules linked in:
> >ip6table_filter ip6_tables ebtable_nat ebtables ipt_MASQUERADE
> >iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4
> >xt_state nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle xt_tcpudp
> >iptable_filter ip_tables x_tables kvm_intel kvm bridge stp llc ast ttm
> >drm_kms_helper drm sysimgblt sysfillrect syscopyarea lp mei_me ioatdma
> >ext2 parport mei shpchp dcdbas joydev mac_hid lpc_ich acpi_pad wmi
> >hid_generic usbhid hid ixgbe igb dca i2c_algo_bit ahci ptp libahci
> >mdio pps_core
> >Jul  2 11:08:21 arno-3 kernel: [ 2165.081090] CPU: 19 PID: 3494 Comm:
> >qemu-system-x86 Not tainted 3.11.0-15-generic #25~precise1-Ubuntu
> >Jul  2 11:08:21 arno-3 kernel: [ 2165.081424] Hardware name: Dell Inc.
> >PowerEdge C6220 II/09N44V, BIOS 2.0.3 07/03/2013
> >Jul  2 11:08:21 arno-3 kernel: [ 2165.081705] task: ffff881026750000
> >ti: ffff881026056000 task.ti: ffff881026056000
> >Jul  2 11:08:21 arno-3 kernel: [ 2165.081973] RIP:
> >0010:[<ffffffff8118d0fa>]  [<ffffffff8118d0fa>]
> >copy_huge_page+0x8a/0x2a0
> 
> 
> Hello,
> 
> sorry for possible top-posting, the same issue appears on at least
> 3.10 LTS series. The original thread is at
> http://marc.info/?l=kvm&m=14043742300901.

Andrey,

I am unable to access the URL above?

> The necessary components for failure to reappear are a single running
> kvm guest and mounted large thp: hugepagesz=1G (seemingly the same as
> in initial report). With default 2M pages everything is working well,
> the same for 3.18 with 1G THP. Are there any obvious clues for the
> issue?
> 
> Thanks!



--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>