From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.10) Gecko/20050719 Fedora/1.7.10-1.5.1 Description of problem: Kernel preemt oops not sure if this is ntp or the kernel Version-Release number of selected component (if applicable): ntp-4.2.0.a.20040617-8 How reproducible: Didn't try Steps to Reproduce: 1. run ntpd 2. look at dmesg 3. see the oops Actual Results: Unable to handle kernel NULL pointer dereference at virtual address 00000000 printing eip: c012f487 *pde = 34bc2067 *pte = 00000000 Oops: 0002 [#1] PREEMPT Modules linked in: pl2303 usbserial via686a eeprom i2c_sensor i2c_isa af_packet ipt_REJECT ipt_LOG ipt_limit ipt_state ip_conntrack iptable_filter ip_tables usbhid pwc videodev v4l2_common ohci1394 ieee1394 uhci_hcd parport_pc parport i2c_viapro snd_emu10k1_synth snd_emux_synth snd_seq_virmidi snd_seq_midi_emul snd_emu10k1 snd_rawmidi snd_ac97_codec snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd_page_alloc snd_util_mem snd_hwdep snd soundcore tulip sr_mod sym53c8xx scsi_transport_spi ide_floppy usbcore evdev CPU: 0 EIP: 0060:[<c012f487>] Not tainted VLI EFLAGS: 00010002 (2.6.12-1.1398_FC4.custom) EIP is at remove_wait_queue+0x27/0x70 eax: f6cc6000 ebx: f61ffce0 ecx: 00000000 edx: d96eb034 esi: d96eb040 edi: 00000296 ebp: d96eb000 esp: f6cc7ed4 ds: 007b es: 007b ss: 0068 Process ntpd (pid: 2818, threadinfo=f6cc6000 task=f658ba60) Stack: d96eb048 d96eb030 d96eb008 c017054d f61ffce0 00000080 00000007 00000019 c0170a6d f6cc7f54 00000000 00000000 00000007 7fffffff f476d2b0 f476d2b4 f476d2b8 f476d2a4 f476d2a8 f476d2ac f6cc6000 00000070 00000000 00000000 Call Trace: [<c017054d>] poll_freewait+0x2d/0x60 [<c0170a6d>] do_select+0x31d/0x370 [<c0170580>] __pollwait+0x0/0xd0 [<c0170d44>] sys_select+0x244/0x3f0 [<c0102ea5>] syscall_call+0x7/0xb Code: 00 8d 76 00 83 ec 0c 89 1c 24 89 74 24 04 89 7c 24 08 9c 5f fa b8 00 e0 ff ff 21 e0 ff 40 14 8d 72 0c 8b 5a 0c 8b 4e 04 89 4b 04 <89> 19 c7 46 04 00 02 20 00 c7 42 0c 00 01 10 00 57 9d ff 48 14 <6>note: ntpd[2818] exited with preempt_count 1 Expected Results: should run fine Additional info: This may be a kernel issue or a memory issue. How do I tell which it is? I'd think if it was memory / hardware I'd see the problem in other programs.
Created attachment 122813 [details] ntp-4.2.0.a.20050816-2.src.rpm Can you compile and install the *.src.rpm above ? Running ntpd creates /tmp/ntpd.PID files (structured auto trace/debug). Please, can you send me these files ?
I think one of the FC4 updates fixed this as it no longer seems to be happening. I'll have to check my logs again, but ntpd seems to be working okay now.