The crashes are because someone is teardropping or nesteaing you. It's a
bug in the ipfragment code that remote people can use to crash your
computer..
2.0.34 fixes nestea.
On Thu, 11 Jun 1998, Greg Estabrooks wrote:
> I'm hoping someone out there can shed some light on a problem I'm having.
> I've been noticing that ALL of my memory is used, however there are very few
> processes actually running. This seems to have caused my system to have a
> kernel fault
> when it completely ran out of physical memory. I've searched through my logs
> and noticed that it has happen twice before. Two of the times the system
> actually rebooted itself after the kernel error, but once it just halted.
>
> When I add up what's listed in a 'ps aux' or a top it only adds up to
> approx 10 meg, but it seems that something is grabbing the left overs. The
> machine is running a named 8.1.12 name server and is doing the
> routing/firewall for a small network. We are vhosting about 5 IP's on the
> machine and there are only about 15 ipfwadm firewall rules so I don't see
> exactly what's stealing all the memory. I noticed also that the swap doesn't
> seem to be getting touched at all.
>
> I've "enclosed" a copy of my ps, top and /proc/meminfo as well as a copy of
> the latest kernel error that is showed up in my logs from the most recent
> freak out in hopes that someone out there might have a clue as to what could
> be the cause? I've since upgraded to kernel 2.0.34 in hopes that it may
> help, but I still see the memory as being in use and am hoping to squish
> this bug soon :)
>
> System specs:
>
> P133, 32meg ram, 12meg swap file, 1.1 gig hd, two PCI nic's connected to a
> hub.
>
> Thx in advance.
> ======================================================================
>
> 8:08pm up 6:02, 1 user, load average: 0.05, 0.02, 0.00
> 24 processes: 23 sleeping, 1 running, 0 zombie, 0 stopped
> CPU states: 0.5% user, 0.3% system, 0.0% nice, 99.1% idle
> Mem: 31072K av, 29648K used, 1424K free, 7860K shrd, 420K buff
> Swap: 14076K av, 0K used, 14076K free 25536K cached
>
> PID USER PRI NI SIZE RSS SHARE STAT LIB %CPU %MEM TIME COMMAND
> 700 root 13 0 572 572 448 R 0 0.9 1.8 0:00 top
> 1 root 0 0 404 404 340 S 0 0.0 1.3 0:01 init
> 2 root 0 0 0 0 0 SW 0 0.0 0.0 0:00 kflushd
> 3 root -12 -12 0 0 0 SW< 0 0.0 0.0 0:00 kswapd
> 609 root 1 0 892 892 576 S 0 0.0 2.8 0:00 sshd
> 339 root 0 0 316 316 260 S 0 0.0 1.0 0:00 mingetty
> 340 root 0 0 316 316 260 S 0 0.0 1.0 0:00 mingetty
> 52 root 0 0 352 352 300 S 0 0.0 1.1 0:00 kerneld
> 197 root 0 0 460 460 384 S 0 0.0 1.4 0:00 syslogd
> 206 root 0 0 504 504 328 S 0 0.0 1.6 0:00 klogd
> 217 daemon 0 0 396 396 320 S 0 0.0 1.2 0:00 atd
> 228 root 0 0 472 472 392 S 0 0.0 1.5 0:00 crond
> 239 root 0 0 656 656 432 S 0 0.0 2.1 0:00 snmpd
> 251 root 0 0 424 424 356 S 0 0.0 1.3 0:00 inetd
> 276 root 0 0 352 352 304 S 0 0.0 1.1 0:00 gpm
> 328 root 9 0 552 552 460 S 0 0.0 1.7 0:09 sshd
> 341 root 0 0 316 316 260 S 0 0.0 1.0 0:00 mingetty
> 342 root 0 0 316 316 260 S 0 0.0 1.0 0:00 mingetty
>
> 343 root 0 0 316 316 260 S 0 0.0 1.0 0:00 mingetty
> 344 root 0 0 316 316 260 S 0 0.0 1.0 0:00 mingetty
> 611 root 8 0 800 800 616 S 0 0.0 2.5 0:00 bash
> 346 root 0 0 236 236 196 S 0 0.0 0.7 0:00 update
> 531 adren 0 0 352 352 304 S 0 0.0 1.1 0:00 bnc
> 675 root 0 0 984 984 556 S 0 0.0 3.1 0:00 named
>
>
>
> ====================================================
>
> USER PID %CPU %MEM SIZE RSS TTY STAT START TIME COMMAND
> adren 531 0.0 1.1 716 352 ? S 16:16 0:00 bnc
> daemon 217 0.0 1.2 768 396 ? S 14:07 0:00 /usr/sbin/atd
> root 1 0.0 1.3 748 404 ? S 14:06 0:01 init [3]
> root 2 0.0 0.0 0 0 ? SW 14:06 0:00 (kflushd)
> root 3 0.0 0.0 0 0 ? SW< 14:06 0:00 (kswapd)
> root 52 0.0 1.1 724 352 ? S 14:07 0:00 kerneld
> root 197 0.0 1.4 784 460 ? S 14:07 0:00 syslogd
> root 206 0.0 1.6 856 504 ? S 14:07 0:00 klogd
> root 228 0.0 1.5 832 472 ? S 14:07 0:00 crond
> root 239 0.0 2.1 1116 656 ? S 14:07 0:00 /usr/sbin/snmpd -f
> root 251 0.0 1.3 768 424 ? S 14:07 0:00 inetd
> root 276 0.0 1.1 732 352 ? S 14:07 0:00 gpm -t ms
> root 328 0.0 1.7 1132 552 ? S 14:07 0:09
> /usr/local/sbin/sshd
> root 339 0.0 1.0 712 316 1 S 14:07 0:00 /sbin/mingetty
> tty1
> root 340 0.0 1.0 712 316 2 S 14:07 0:00 /sbin/mingetty
> tty2
> root 341 0.0 1.0 712 316 3 S 14:07 0:00 /sbin/mingetty
> tty3
> root 342 0.0 1.0 712 316 4 S 14:07 0:00 /sbin/mingetty
> tty4
> root 343 0.0 1.0 712 316 5 S 14:07 0:00 /sbin/mingetty
> tty5
> root 344 0.0 1.0 712 316 6 S 14:07 0:00 /sbin/mingetty
> tty6
> root 346 0.0 0.7 708 236 ? S 14:07 0:00 update (bdflush)
> root 609 0.1 2.8 1224 892 ? S 19:59 0:00
> /usr/local/sbin/sshd
> root 611 0.0 2.5 1196 800 p0 S 19:59 0:00 -bash
> root 675 0.0 3.1 1388 984 ? S 20:00 0:00 named
> root 701 0.0 1.5 812 480 p0 R 20:12 0:00 ps aux
>
> ==========================================================
>
> total: used: free: shared: buffers: cached:
> Mem: 31817728 30281728 1536000 7839744 430080 26148864
> Swap: 14413824 0 14413824
> MemTotal: 31072 kB
> MemFree: 1500 kB
> MemShared: 7656 kB
> Buffers: 420 kB
> Cached: 25536 kB
> SwapTotal: 14076 kB
> SwapFree: 14076 kB
>
> =======================================================
>
> Jun 11 14:05:36 cronos kernel: Warning: kfree_skb passed an skb still on a
> list (from 005ffaf4).
> Jun 11 14:05:36 cronos kernel: Unable to handle kernel paging request at
> virtual address c319001a
> Jun 11 14:05:36 cronos kernel: current->tss.cr3 = 00101000,
> Jun 11 14:05:36 cronos kernel: *pde = 00000000
> Jun 11 14:05:36 cronos kernel: Oops: 0000
> Jun 11 14:05:36 cronos kernel: CPU: 0
> Jun 11 14:05:36 cronos kernel: EIP: 0010:[<0319001a>]
>
> Jun 11 14:05:36 cronos kernel: EFLAGS: 00010202
> Jun 11 14:05:36 cronos kernel: eax: 0319001a ebx: 001a008a ecx: 005ff9fc
> edx: 005ff000
> Jun 11 14:05:36 cronos kernel: esi: 00000184 edi: 00000000 ebp: 001a6c5c
> esp: 001a6bf4
> Jun 11 14:05:36 cronos kernel: ds: 0018 es: 0018 fs: 002b gs: 0018
> ss: 0018
> Jun 11 14:05:36 cronos kernel: Process swapper (pid: 0, process nr: 0,
> stackpage=001a4d48)
> Jun 11 14:05:36 cronos kernel: Stack: 00136ef3 001a008a 001a008a 005ffaf4
> 001371f3 001a008a 005ffaf4 005fff3c
> Jun 11 14:05:36 cronos kernel: 00ab0074 0000011c 0013f35d 005ffaf4
> 00000000 00000000 005fff3c 001aa6bc
> Jun 11 14:05:36 cronos kernel: 00000002 00007100 00000000 005fff8c
> 00000001 001b2700 ffffff00 00000100
> Jun 11 14:05:36 cronos kernel: Call Trace: [sock_wfree+35/44]
> [kfree_skb+183/244] [ip_rcv+1197/1416] [net_bh+252/284] [do_bottom_ha$
> Jun 11 14:05:36 cronos kernel: [sys_idle+59/112] [system_call+85/124]
> [init+0/612] [start_kernel+424/436]
> Jun 11 14:05:36 cronos kernel: Code: <1>Unable to handle kernel paging
> request at virtual address c319001a
> ===============================================
> GreyFoxx
>
>
>
> http://users.andara.com/~greyfoxx
>
> "Unix _is_ user friendly.
> It's just very selective about who its friends are.
> And sometimes even best friends have fights. "
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.rutgers.edu
>
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu