Hi *, I had problems to connect my server. All ICMP tools like ping and tracert did their job well. Nmap was able to identify the OS and all open ports. But while connecting via SSH or WWW the programms aborted with a timeout failure. After rebooting the maschine (nothing other helps), all services work properly. I found following entries in my /var/log/messages: Oct 30 00:00:00 server /USR/SBIN/CRON[19725]: (root) CMD ( rm -f /var/cron/lastrun/cron.daily) Oct 30 00:00:09 server su: (to nobody) root on none Oct 30 00:00:09 server su: pam_unix session started for user nobody, service su Oct 30 00:00:54 server kernel: kfree: Bad obj c053a300 Oct 30 00:00:54 server kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000000 Oct 30 00:00:54 server kernel: current->tss.cr3 = 00bd8000, %%cr3 = 00bd8000 Oct 30 00:00:54 server kernel: *pde = 00000000 Oct 30 00:00:54 server kernel: Oops: 0002 Oct 30 00:00:54 server kernel: CPU: 0 Oct 30 00:00:54 server kernel: EIP: 0010:[kfree+475/496] Oct 30 00:00:54 server kernel: EFLAGS: 00010282 Oct 30 00:00:54 server kernel: eax: 0000001b ebx: c1fff620 ecx: 0000003b edx: 00000028 Oct 30 00:00:54 server kernel: esi: c053a300 edi: c053aaa0 ebp: 00000000 esp: c0babe64 Oct 30 00:00:54 server kernel: ds: 0018 es: 0018 ss: 0018 Oct 30 00:00:54 server kernel: Process find (pid: 19826, process nr: 53, stackpage=c0bab000) Oct 30 00:00:54 server kernel: Stack: c1fa71e0 00000000 c053aaa0 00000000 c053aac0 c0744450 c053aaa0 c0134562 Oct 30 00:00:54 server kernel: c053a300 c0babec0 00009803 00000405 c1fb1000 00000405 c01356bc fffffdd3 Oct 30 00:00:54 server kernel: 000001e8 c0208eb8 00009803 c0229188 c1fb1000 c09db5d0 c07e4000 c0babec0 Oct 30 00:00:54 server kernel: Call Trace: [prune_dcache+210/288] [try_to_free_inodes+188/256] [grow_inodes+32/416] [get_new_inode+229/336] [iget+106/128] [ext2_lookup+100/160] [real_lookup+79/192] Oct 30 00:00:54 server kernel: [lookup_dentry+272/432] [__namei+41/96] [sys_newlstat+19/112] [system_call+52/56] Oct 30 00:00:54 server kernel: Code: c7 05 00 00 00 00 00 00 00 00 83 c4 08 5b 5e 5f 5d 83 c4 0c Oct 30 00:00:54 server su: pam_unix session finished for user nobody, service su Oct 30 00:20:25 server -- MARK -- Oct 30 00:23:15 server sshd[199]: log: Generating new 768 bit RSA key. Oct 30 00:50:25 server -- MARK -- Oct 30 01:20:25 server -- MARK -- Any Ideas what happened with the machine? Thanx, Boris.
hi boris, Boris Kantwerk wrote:
Hi *,
I had problems to connect my server. All ICMP tools like ping and tracert did their job well. Nmap was able to identify the OS and all open ports. But while connecting via SSH or WWW the programms aborted with a timeout failure.
After rebooting the maschine (nothing other helps), all services work properly. I found following entries in my /var/log/messages:
Oct 30 00:00:00 server /USR/SBIN/CRON[19725]: (root) CMD ( rm -f /var/cron/lastrun/cron.daily) Oct 30 00:00:09 server su: (to nobody) root on none Oct 30 00:00:09 server su: pam_unix session started for user nobody, service su
perhaps your have suse linux, it starts a cronjob every midnight, wich su to nobody to do some cleanupJobs. cant say somthing about the following oops, if its really suse try to run batch '/usr/lib/cron/run-crons'. perhaps it oopses again. [snip] greets stefan -- stefan mojschewitsch
On Mon, 30 Oct 2000, Boris Kantwerk wrote:
Oct 30 00:00:54 server kernel: kfree: Bad obj c053a300 Oct 30 00:00:54 server kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000000 Oct 30 00:00:54 server kernel: current->tss.cr3 = 00bd8000, %%cr3 = 00bd8000 Oct 30 00:00:54 server kernel: *pde = 00000000 Oct 30 00:00:54 server kernel: Oops: 0002 Oct 30 00:00:54 server kernel: CPU: 0 Oct 30 00:00:54 server kernel: EIP: 0010:[kfree+475/496] Oct 30 00:00:54 server kernel: EFLAGS: 00010282 Oct 30 00:00:54 server kernel: eax: 0000001b ebx: c1fff620 ecx: 0000003b edx: 00000028 Oct 30 00:00:54 server kernel: esi: c053a300 edi: c053aaa0 ebp: 00000000 esp: c0babe64 Oct 30 00:00:54 server kernel: ds: 0018 es: 0018 ss: 0018 Oct 30 00:00:54 server kernel: Process find (pid: 19826, process nr: 53, stackpage=c0bab000) Oct 30 00:00:54 server kernel: Stack: c1fa71e0 00000000 c053aaa0 00000000 c053aac0 c0744450 c053aaa0 c0134562 Oct 30 00:00:54 server kernel: c053a300 c0babec0 00009803 00000405 c1fb1000 00000405 c01356bc fffffdd3 Oct 30 00:00:54 server kernel: 000001e8 c0208eb8 00009803 c0229188 c1fb1000 c09db5d0 c07e4000 c0babec0 Oct 30 00:00:54 server kernel: Call Trace: [prune_dcache+210/288] [try_to_free_inodes+188/256] [grow_inodes+32/416] [get_new_inode+229/336] [iget+106/128] [ext2_lookup+100/160] [real_lookup+79/192] Oct 30 00:00:54 server kernel: [lookup_dentry+272/432] [__namei+41/96] [sys_newlstat+19/112] [system_call+52/56] Oct 30 00:00:54 server kernel: Code: c7 05 00 00 00 00 00 00 00 00 83 c4 08 5b 5e 5f 5d 83 c4 0c You probably have a hardware problem. Maybe CPU is too hot or RAM defective. That's definitly NOT a break in... it's caused by the scripts running at midnight and making CPU too hot or touching 'bad' RAM.
bye Markus -- _____________________________ Markus Gaugusch ICQ 11374583 markus@gaugusch.dhs.org 92
participants (3)
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Boris Kantwerk -
Markus Gaugusch -
stefan mojschewitsch