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    SubjectRe: 2.6.37-rc7: NULL pointer dereference
    * MinChan Kim <minchan.kim@gmail.com> [2010-12-23 00:37:11]:

    > Cced linux-mm and maintainers of memcg.
    >
    > On Wed, Dec 22, 2010 at 9:25 PM, Thomas Meyer <thomas@m3y3r.de> wrote:
    > > BUG: unable to handle kernel NULL pointer dereference at 00000008
    > > IP: [<c04eae14>] __mem_cgroup_try_charge+0x234/0x430
    > > *pde = 00000000
    > > Oops: 0000 [#1]
    > > last sysfs file: /sys/devices/platform/regulatory.0/uevent
    > > Modules linked in: vfat fat usb_storage fuse sco bnep l2cap bluetooth cpufreq_ondemand acpi_cpufreq mperf ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables kvm_intel kvm uinput arc4 ecb snd_hda_codec_hdmi snd_hda_codec_realtek iwlagn snd_hda_intel snd_hda_codec iwlcore uvcvideo snd_hwdep mac80211 snd_seq videodev snd_seq_device snd_pcm cfg80211 snd_timer rfkill v4l1_compat wmi snd pcspkr soundcore joydev serio_raw snd_page_alloc ipv6 sha256_generic aes_i586 aes_generic cbc dm_crypt [last unloaded: scsi_wait_scan]
    > > Pid: 8058, comm: swapoff Tainted: G          I 2.6.37-rc7 #221 JM11-MS/Aspire 1810T
    > > EIP: 0060:[<c04eae14>] EFLAGS: 00010246 CPU: 0
    > > EIP is at __mem_cgroup_try_charge+0x234/0x430
    > > EAX: 00000008 EBX: 00000000 ECX: f2e71f10 EDX: f2f96380
    > > ESI: f3e55860 EDI: 00020000 EBP: f2e71eb4 ESP: f2e71e54
    > >  DS: 007b ES: 007b FS: 0000 GS: 00e0 SS: 0068
    > > Process swapoff (pid: 8058, ti=f2e70000 task=f3e55860 task.ti=f2e70000)
    > > Stack:
    > >  f2e71e88 c0456607 26ba7c1c f3e55860 00000010 f3e55860 069d208a b2ee651d
    > >  00000008 000000d0 f2f96380 00000005 01ffffff f2e71f10 00000246 ec1a64ae
    > >  ffffffff 00000000 27b52eae f044dc84 00000000 f2f96380 00000000 000000d0
    > > Call Trace:
    > >  [<c0456607>] ? ktime_get_ts+0x107/0x140
    > >  [<c04ebb89>] ? mem_cgroup_try_charge_swapin+0x49/0xb0
    > >  [<c04d9b4b>] ? unuse_mm+0x1db/0x300
    > >  [<c04dad9a>] ? sys_swapoff+0x2aa/0x890
    > >  [<c047cd58>] ? audit_syscall_entry+0x218/0x240
    > >  [<c047d043>] ? audit_syscall_exit+0x1f3/0x220
    > >  [<c0403013>] ? sysenter_do_call+0x12/0x22
    > > Code: 55 c8 8b 82 90 01 00 00 85 c0 74 09 8b 80 7c 03 00 00 8b 58 2c 3b 1d 54 20 a9 c0 74 61 3b 1d 4c ca a4 c0 74 6a 8d 43 08 89 45 c0 <8b> 43 08 a8 01 0f 85 73 fe ff ff 8d 4b 04 89 5d bc 8d 76 00 8b
    > > EIP: [<c04eae14>] __mem_cgroup_try_charge+0x234/0x430 SS:ESP 0068:f2e71e54
    > > CR2: 0000000000000008

    Thanks for the report, does this happen at bootup?

    --
    Three Cheers,
    Balbir
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