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Re: chkrootkit and false positives?
Posted by oxtan (82.93.xx.xx) on Sat 27 Jan 2007 at 12:18
I tried restarting the service apcupsd but I got an 'Ooops' from the kernel:

Jan 27 12:55:58 tux apcupsd[20605]: apcupsd exiting, signal 15
Jan 27 12:55:58 tux apcupsd[20605]: apcupsd shutdown succeeded
Jan 27 12:56:01 tux /USR/SBIN/CRON[9363]: (root) CMD (/sbin/adslscript)
Jan 27 12:56:09 tux kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000c45
Jan 27 12:56:09 tux kernel: printing eip:
Jan 27 12:56:09 tux kernel: d4ae55a2
Jan 27 12:56:09 tux kernel: *pde = 00000000
Jan 27 12:56:09 tux kernel: Oops: 0000 [#2]
Jan 27 12:56:09 tux kernel: PREEMPT
Jan 27 12:56:09 tux kernel: Modules linked in: ide_cd cdrom evdev pcspkr floppy snd_ens1371 snd_rawmidi snd_seq_device snd_pcm snd_page_alloc snd_timer snd_ac97_codec es1371 gameport ac97_codec aic79xx uhci_hcd
pci_hotplug intel_agp agpgart usbhid nfsd exportfs lockd sunrpc sch_htb sch_ingress cls_fw cls_u32 sch_sfq sch_cbq ppp_deflate zlib_deflate bsd_comp ppp_synctty ppp_generic slhc ipt_REDIRECT ipt_REJECT ipt_rec
ent ipt_length ipt_TOS iptable_mangle usbcore parport_pc lp autofs4 ipv6 genrtc snd_mixer_oss snd soundcore dm_mod capability commoncap 3c59x ipt_conntrack ipt_ULOG aic7xxx st tun loop ip_nat_irc ip_conntrack_i
rc ip_nat_ftp ip_conntrack_ftp parport ipt_mark ipt_state iptable_filter ipt_MARK ipt_MASQUERADE iptable_nat ip_conntrack ipt_LOG ip_tables af_packet ext3 jbd mbcache ide_generic piix ide_disk ide_core sd_mod a
ta_piix libata scsi_mod unix font vesafb cfbcopyarea cfbimgblt cfbfillrect
Jan 27 12:56:09 tux kernel: CPU: 0
Jan 27 12:56:09 tux kernel: EIP: 0060:[<d4ae55a2>] Not tainted
Jan 27 12:56:09 tux kernel: EFLAGS: 00010286 (2.6.8-3-686)
Jan 27 12:56:09 tux kernel: EIP is at hiddev_ioctl+0x32/0x920 [usbhid]
Jan 27 12:56:09 tux kernel: eax: cd44acc0 ebx: 00004802 ecx: ca536800 edx: fffffffb
Jan 27 12:56:09 tux kernel: esi: 00000000 edi: 00000001 ebp: 00000000 esp: c189fef0
Jan 27 12:56:09 tux kernel: ds: 007b es: 007b ss: 0068
Jan 27 12:56:09 tux kernel: Process apcupsd (pid: 9370, threadinfo=c189e000 task=d3f1ef30)
Jan 27 12:56:09 tux kernel: Stack: d37d39c0 00000000 c189e000 cc3e3e60 00000000 d4a41a00 c015e392 d339eb54
Jan 27 12:56:09 tux kernel: d37d39c0 00000103 c9d5e32c d37d39c0 d339eb54 d3fbbaa0 d3fbbaa0 c0153cfc
Jan 27 12:56:09 tux kernel: d37d3a08 d339ebec 71d4d9d3 00000102 0808b7f8 cea9e000 c189e000 c0153be8
Jan 27 12:56:09 tux kernel: Call Trace:
Jan 27 12:56:09 tux kernel: [<d4a41a00>] usb_open+0x0/0x1f0 [usbcore]
Jan 27 12:56:09 tux kernel: [<c015e392>] chrdev_open+0xf2/0x220
Jan 27 12:56:09 tux kernel: [<c0153cfc>] dentry_open+0x10c/0x240
Jan 27 12:56:09 tux kernel: [<c0153be8>] filp_open+0x68/0x70
Jan 27 12:56:09 tux kernel: [<c01681cc>] sys_ioctl+0x11c/0x280
Jan 27 12:56:09 tux kernel: [<c010603b>] syscall_call+0x7/0xb
Jan 27 12:56:09 tux kernel: Code: 8b b7 44 0c 00 00 85 c0 74 64 81 fb 01 48 04 80 0f 84 9e 08


anyway, I powercycled the machine, all is back to normal and now chkrootkit shows nothing strange.

The ups is a cheap one, a 500 model, so maybe that is part of the problem.

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