With kernel 2.6.23.9 BUG: unable to handle kernel NULL pointer dereference at virtual address 0000000 0 printing eip: *pde = 00000000 Oops: 0000 [#1] Modules linked in: cls_fw sch_prio sch_htb iptable_nat xt_limit xt_state ipt_REJECT xt_tcpudp ipt_LOG xt_DSCP xt_dscp xt_mark nf_conntrack_ipv4 xt_CONNMARK xt_MARK iptable_mangle iptable_filter ip_tables x_tables nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack nfnetlink ipv6 i2c_viapro hostap_pci hostap via686a ieee80211_crypt evdev ide_cd CPU: 0 EIP: 0060:[] Not tainted VLI EFLAGS: 00010297 (2.6.23.9 #4) EIP is at hostap_80211_rx+0x451/0xf87 [hostap] eax: cecfe4a0 ebx: 00000000 ecx: cfa4263e edx: 00000000 esi: cfa42634 edi: 00000000 ebp: 00001148 esp: c0409e80 ds: 007b es: 007b fs: 0000 gs: 0000 ss: 0068 Process swapper (pid: 0, ti=c0408000 task=c03d7280 task.ti=c0408000) Stack: 00000000 00000080 00000004 ce289ae0 c0409ebc c0113bbf c044148c c044148c c0441440 c0409f30 cfd51980 00000018 00000100 cecfe484 00001148 00000040 000049f0 cecfe000 cfa4dbb0 0000001c cecfe000 cecfe3b0 00000000 cfa4263e Call Trace: [] enqueue_entity+0x1d2/0x1f3 [] ktime_get_ts+0x11/0x3a [] hostap_rx_tasklet+0x11f/0x145 [hostap_pci] [] tasklet_action+0x32/0x52 [] __do_softirq+0x35/0x75 [] do_softirq+0x22/0x26 [] irq_exit+0x29/0x58 [] do_IRQ+0x58/0x6c [] tick_notify+0x161/0x220 [] common_interrupt+0x23/0x28 [] apply_relocate+0x77/0x95 [] acpi_processor_idle+0x22f/0x39b [] cpu_idle+0x43/0x5d [] start_kernel+0x237/0x23c [] unknown_bootoption+0x0/0x195 ======================= Code: 44 24 34 8b 58 1c eb 23 83 bb d8 00 00 00 04 75 18 8b 54 24 5c 8d 83 dc 00 00 00 b9 06 00 00 00 e8 1b 69 91 ef 85 c0 74 18 89 fb <8b> 3b 0f 18 07 90 8b 44 24 34 83 c0 1c 39 c3 75 cc e9 c9 0a 00 EIP: [] hostap_80211_rx+0x451/0xf87 [hostap] SS:ESP 0068:c0409e80 Kernel panic - not syncing: Fatal exception in interrupt wlan0ap: SW TICK stuck? bits=0x0 EvStat=8001 IntEn=e018