<pre> [13444.209171] BUG: unable to handle kernel NULL pointer dereference at 0000000000000002 [13444.212042] IP: [<ffffffff80218e16>] powernowk8_target+0x61d/0x857 [13444.212042] PGD 2179c3067 PUD 22b438067 PMD 0 [13444.212042] Oops: 0002 [1] SMP [13444.212042] CPU 0 [13444.212042] Modules linked in: w83627hf hwmon_vid autofs4 smsc37b787_wdt i2c_nforce2 forcedeth i2c_core k8temp tg3 libphy e1000 xfs dm_snapshot dm_mirror dm_log aacraid 3w_9xxx 3w_xxxx atp870u arcmsr aic7xxx scsi_wait_scan [13444.212042] Pid: 251, comm: kondemand/0 Not tainted 2.6.27-rc5-22033-gd26acd9-dirty #2 [13444.212042] RIP: 0010:[<ffffffff80218e16>] [<ffffffff80218e16>] powernowk8_target+0x61d/0x857 [13444.212042] RSP: 0018:ffff88012fbebdc0 EFLAGS: 00010246 [13444.212042] RAX: 0000000000000000 RBX: ffff88012e502600 RCX: 0000000000000002 [13444.212042] RDX: 0000000000000008 RSI: 0000000000000002 RDI: ffff88012e502600 [13444.212042] RBP: 000000000000000c R08: 0000000000000008 R09: 0000000000000190 [13444.212042] R10: ffff88012fbebd50 R11: ffffffff803bac5e R12: 0000000000000002 [13444.212042] R13: 0000000000000012 R14: 0000000000000008 R15: 0000000000000000 [13444.212042] FS: 0000000042427950(0000) GS:ffffffff80858e00(0000) knlGS:0000000000000000 [13444.212042] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b [13444.212042] CR2: 0000000000000002 CR3: 00000002179c2000 CR4: 00000000000006e0 [13444.212042] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [13444.212042] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [13444.212042] Process kondemand/0 (pid: 251, threadinfo ffff88012fbea000, task ffff88012fbe3c40) [13444.212042] Stack: 0000000000000002 ffff880000000000 ffff88012e459600 0000001400000282 [13444.212042] 002ab98000000001 ffff8800000f4240 0000000000000001 000000062e459600 [13444.212042] 0000000000000000 0000000000000046 ffff88012e459600 000000000000007e [13444.212042] Call Trace: [13444.212042] [<ffffffff8050d244>] ? do_dbs_timer+0x1e0/0x24f [13444.212042] [<ffffffff8050d064>] ? do_dbs_timer+0x0/0x24f [13444.212042] [<ffffffff8050d064>] ? do_dbs_timer+0x0/0x24f [13444.212042] [<ffffffff80244394>] ? run_workqueue+0xed/0x1ed [13444.212042] [<ffffffff8024433e>] ? run_workqueue+0x97/0x1ed [13444.212042] [<ffffffff80244ef7>] ? worker_thread+0xd8/0xe3 [13444.212042] [<ffffffff8024791a>] ? autoremove_wake_function+0x0/0x2e [13444.212042] [<ffffffff80244e1f>] ? worker_thread+0x0/0xe3 [13444.212042] [<ffffffff80247805>] ? kthread+0x47/0x76 [13444.212042] [<ffffffff80230223>] ? schedule_tail+0x27/0x5f [13444.212042] [<ffffffff8020ce09>] ? child_rip+0xa/0x11 [13444.212042] [<ffffffff8024767c>] ? kthreadd+0x167/0x18c [13444.212042] [<ffffffff802477be>] ? kthread+0x0/0x76 [13444.212042] [<ffffffff8020cdff>] ? child_rip+0x0/0x11 [13444.212042] [13444.212042] [13444.212042] Code: c7 f7 31 6f 80 e8 b1 d0 01 00 e9 4c 01 00 00 8b 53 28 41 39 d6 74 0e 44 89 f6 48 c7 c7 42 32 6f 80 31 c0 eb e0 45 89 f0 44 89 e1 <48> c7 c2 7a 32 6f 80 48 c7 c6 f7 2b 6f 80 bf 02 00 00 00 31 c0 [13444.212042] RIP [<ffffffff80218e16>] powernowk8_target+0x61d/0x857 [13444.212042] RSP <ffff88012fbebdc0> [13444.212042] CR2: 0000000000000002 [13444.530077] ---[ end trace 7cca0ea284e8104a ]--- </pre>