Kernel failure message 1:
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kernel BUG at /build/buildd-linux-2.6_2.6.32-39-amd64-7yVIH2/linux-2.6-2.6.32/debian/build/source_amd64_none/mm/slub.c:2969!
invalid opcode: 0000 [#1] SMP
last sysfs file: /sys/devices/virtual/net/lo/operstate
CPU 0
Modules linked in: loop snd_hda_codec_idt snd_hda_intel snd_hda_codec btusb arc4 ecb snd_hwdep snd_pcm bluetooth snd_seq b43 snd_timer uvcvideo radeon snd_seq_device rng_core joydev ttm videodev drm_kms_helper v4l1_compat mac80211 v4l2_compat_ioctl32 drm snd cfg80211 i2c_algo_bit dell_laptop soundcore i2c_i801 i2c_core video snd_page_alloc rfkill psmouse wmi output evdev serio_raw dcdbas processor pcspkr led_class battery button ac ext3 jbd mbcache sg sr_mod cdrom sd_mod crc_t10dif usbhid hid usb_storage uhci_hcd ahci ssb mmc_core pcmcia libata sky2 pcmcia_core ehci_hcd thermal thermal_sys scsi_mod usbcore nls_base [last unloaded: scsi_wait_scan]
Pid: 1232, comm: dhclient Not tainted 2.6.32-5-amd64 #1 Inspiron 1545
RIP: 0010:[<ffffffff810e74c7>]  [<ffffffff810e74c7>] kfree+0x55/0xcb
RSP: 0018:ffff88011b56de68  EFLAGS: 00010246
RAX: 0200000000000400 RBX: ffff88011cdc5e00 RCX: ffffffff81130ee3
RDX: ffff88011cdc5e00 RSI: ffff88011cee26c0 RDI: ffffea0003800000
RBP: ffff880100000000 R08: dead000000100100 R09: ffffffff814577e0
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffff81105360
R13: ffff88011e406030 R14: ffffffff8113888c R15: ffff88011cee26c0
FS:  00007fc536610700(0000) GS:ffff880005400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000041e606 CR3: 000000011d625000 CR4: 00000000000406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process dhclient (pid: 1232, threadinfo ffff88011b56c000, task ffff88011d2ba350)
Stack:
 ffff88011cdc5e00 ffff88011e406030 ffff88011cee26c0 ffffffff81105360
<0> ffff88011cee26c0 0000000000000000 ffff88011e406030 ffffffff811388c0
<0> ffff88011d7ae580 ffff88011d7ae580 ffff88011fb02540 ffffffff81130ef8
Call Trace:
 [<ffffffff81105360>] ? seq_release_private+0x1b/0x33
 [<ffffffff811388c0>] ? seq_release_net+0x34/0x3b
 [<ffffffff81130ef8>] ? proc_reg_release+0x10c/0x126
 [<ffffffff810efe1d>] ? __fput+0x100/0x1af
 [<ffffffff810ed282>] ? filp_close+0x5b/0x62
 [<ffffffff810ed31d>] ? sys_close+0x94/0xcd
 [<ffffffff81010b42>] ? system_call_fastpath+0x16/0x1b
Code: 83 c3 08 48 83 3b 00 eb ec 48 83 fd 10 0f 86 89 00 00 00 48 89 ef e8 b9 e8 ff ff 48 89 c7 48 8b 00 84 c0 78 13 66 a9 00 c0 75 04 <0f> 0b eb fe 5b 5d 41 5c e9 74 56 fd ff 48 8b 4c 24 18 4c 8b 4f
RIP  [<ffffffff810e74c7>] kfree+0x55/0xcb
 RSP <ffff88011b56de68>
---[ end trace ad724a499bd32436 ]---