Dear fellows,
Since a few years we use a linux-NAT to provide internet access for a
university campus network (average load of 1.5 Mbit/s). This runs
reasonably well except for regular kernel crashes, that leave the
machine dead.
We have had the problem with several kernels (2.0.24, 2.0.30, 2.0.33,
2.0.34 and now 2.0.36pre19). An indication of the problem may be the
warnings which are listed below. It problem is related to load. Now it
crashes every few days, whereas during holiday periods when the load
is about half as high the machine can stay up for more than a month.
The machine is a few years old pentium. We tried network cards from
3com (905) and from dlink (DFE-500TX).
We use a rather strict IP-filter and log denied trafic.
Thanks for any help,
Hugo
Hugo Embrechts
------- KULeuvenNet -------------------------------------------------------
Ludit, W. de Croylaan 52A, B-3001 Heverlee
Hugo.Embrechts@kulnet.kuleuven.ac.be
016 / 32 27 85 (Tel.), 32 29 99 (Fax.)
Kernel messages
---------------
I.
Nov 10 13:42:15 ds9 kernel: Warning: kfree_skb passed an skb still on a list (from 00ffcf3c).
Nov 10 13:42:15 ds9 kernel: invalid operand: 0000
Nov 10 13:42:15 ds9 kernel: CPU: 0
Nov 10 13:42:15 ds9 kernel: EIP: 0010:[<0008df85>]
Nov 10 13:42:15 ds9 kernel: EFLAGS: 00010293
Nov 10 13:42:15 ds9 kernel: eax: 0008dcf5 ebx: 00ffcce4 ecx: 00ffcf3c edx: 03c62414
Nov 10 13:42:15 ds9 kernel: esi: 00ffcefc edi: 00000000 ebp: 001ff0d4 esp: 001ff06c
Nov 10 13:42:15 ds9 kernel: ds: 0018 es: 0018 fs: 002b gs: 0018 ss: 0018
Nov 10 13:42:15 ds9 kernel: Process swapper (pid: 0, process nr: 0, stackpage=001fd1bc)
Nov 10 13:42:15 ds9 kernel: Stack: 00139a83 00ffcce4 00ffcce4 00ffcf3c 00139d83 00ffcce4 00ffcf3c 00ffcf3c
Nov 10 13:42:15 ds9 kernel: 00ffcefc 0000003d 001422de 00ffcf3c 00000000 00000000 00ffcf3c 002053b0
Nov 10 13:42:15 ds9 kernel: 00000000 0022be70 00000000 00000000 00000000 00ffcd00 ffffff00 42a9d8cc
Nov 10 13:42:15 ds9 kernel: Call Trace: [sock_wfree+35/44] [kfree_skb+183/244] [ip_rcv+1474/1492] [vremap+72/128] [net_bh+252/284] [do_bottom_half+59/96] [handle_bottom_half+11/24]
Nov 10 13:42:15 ds9 kernel: [sys_idle+92/112] [system_call+85/124] [init+0/612] [start_kernel+429/440] [it_real_fn+0/72] [schedule+564/652]
Nov 10 13:42:15 ds9 kernel: Code: fe ff 83 c4 08 c3 90 53 8b 44 24 08 8b 98 3c 09 00 00 66 8b
Nov 10 13:42:15 ds9 kernel: Aiee, killing interrupt handler
Nov 10 13:42:15 ds9 kernel: kfree of non-kmalloced memory: 001ff204, next= 00000018, order=1951796
Nov 10 13:42:15 ds9 kernel: kfree of non-kmalloced memory: 001ff1f4, next= 00000018, order=1951796
Nov 10 13:42:15 ds9 kernel: kfree of non-kmalloced memory: 001ff708, next= 00000018, order=1951796
Nov 10 13:42:15 ds9 kernel: idle task may not sleep
Nov 10 13:42:15 ds9 last message repeated 4 times
II.
Nov 11 16:05:08 ds9 kernel: Warning: kfree_skb passed an skb still on a list (from 00ffcf3c).
Nov 11 16:05:08 ds9 kernel: Oops: 0002
Nov 11 16:05:08 ds9 kernel: CPU: 0
Nov 11 16:05:08 ds9 kernel: EIP: 0010:[<0008dc40>]
Nov 11 16:05:08 ds9 kernel: EFLAGS: 00010a87
Nov 11 16:05:08 ds9 kernel: eax: 0008dc01 ebx: 00ffcce4 ecx: 00ffcf3c edx: 03c62414
Nov 11 16:05:08 ds9 kernel: esi: 00ffcefc edi: 00000000 ebp: 001fe40c esp: 001fe3a4
Nov 11 16:05:08 ds9 kernel: ds: 0018 es: 0018 fs: 002b gs: 0000 ss: 0018
Nov 11 16:05:08 ds9 kernel: Process swapper (pid: 0, process nr: 0, stackpage=001fd1bc)
Nov 11 16:05:08 ds9 kernel: Stack: 00139a83 00ffcce4 00ffcce4 00ffcf3c 00139d83 00ffcce4 00ffcf3c 00ffcf3c
Nov 11 16:05:08 ds9 kernel: 00ffcefc 0000003e 001422de 00ffcf3c 00000000 00000000 00ffcf3c 002053b0
Nov 11 16:05:08 ds9 kernel: 0000fc80 00ffcce4 00000000 00000000 00000000 00ffcd00 ffffff00 42a9d8cc
Nov 11 16:05:08 ds9 kernel: Call Trace: [sock_wfree+35/44] [kfree_skb+183/244] [ip_rcv+1474/1492] [vremap+72/128] [net_bh+252/284] [do_bottom_half+59/96] [handle_bottom_half+11/24]
Nov 11 16:05:08 ds9 kernel: [exit_notify+62/472] [do_exit+456/508] [ip_masq_raudio+75497472/1571520512] [die_if_kernel+695/704] [ip_masq_raudio+83886080/1571520512] [ip_masq_raudio+75497472/1571520512] [BusLogic_ComputeResultCode+84/336] [do_page_fault+718/736]
Nov 11 16:05:08 ds9 kernel: [do_page_fault+0/736] [error_code+64/72] [sock_wfree+35/44] [kfree_skb+183/244] [ip_rcv+1474/1492] [ip_masq_raudio+76020864/1571520512] [vremap+72/128] [net_bh+252/284]
Nov 11 16:05:08 ds9 kernel: [do_bottom_half+59/96] [handle_bottom_half+11/24] [exit_notify+62/472] [do_exit+456/508] [ip_masq_raudio+75497472/1571520512] [die_if_kernel+695/704] [ip_masq_raudio+83886080/1571520512] [ip_masq_raudio+75497472/1571520512]
Nov 11 16:05:08 ds9 kernel: [tty_set_ldisc+200/448] [do_invalid_op+61/68] [do_invalid_op+0/68] [error_code+64/72] [sock_wfree+35/44] [kfree_skb+183/244] [ip_rcv+1474/1492] [net_bh+252/284]
Nov 11 16:05:08 ds9 kernel: [vremap+72/128] [net_bh+252/284] [do_bottom_half+59/96] [handle_bottom_half+11/24] [exit_notify+59/472] [do_exit+456/508] [ip_masq_raudio+75497472/1571520512] [die_if_kernel+695/704]
Nov 11 16:05:08 ds9 kernel: [ip_masq_raudio+83886080/1571520512] [ip_masq_raudio+75497472/1571520512] [tty_set_ldisc+200/448] [do_invalid_op+61/68] [do_invalid_op+0/68] [error_code+64/72] [sock_wfree+35/44] [kfree_skb+183/244]
Nov 11 16:05:08 ds9 kernel: [ip_rcv+1474/1492] [net_bh+252/284] [vremap+72/128] [net_bh+252/284] [do_bottom_half+59/96] [handle_bottom_half+11/24] [exit_notify+59/472] [do_exit+456/508]
Nov 11 16:05:08 ds9 kernel: [ip_masq_raudio+75497472/1571520512] [die_if_kernel+695/704] [ip_masq_raudio+83886080/1571520512] [ip_masq_raudio+75497472/1571520512] [do_general_protection+124/172] [do_general_protection+0/172] [error_code+64/72] [sock_wfree+35/44]
Nov 11 16:05:08 ds9 kernel: [ip_rcv+1474/1492] [net_bh+252/284] [do_bottom_half+59/96] [handle_bottom_half+11/24] [exit_notify+62/472] [do_exit+456/508] [ip_masq_raudio+75497472/1571520512] [die_if_kernel+695/704]
Nov 11 16:05:08 ds9 kernel: [ip_masq_raudio+83886080/1571520512] [ip_masq_raudio+75497472/1571520512] [do_invalid_op+61/68] [do_invalid_op+0/68] [error_code+64/72] [sock_wfree+35/44] [kfree_skb+183/244] [ip_rcv+1474/1492]
Nov 11 16:05:08 ds9 kernel: [arp_bind_cache+540/692] [net_bh+252/284] [do_bottom_half+59/96] [handle_bottom_half+11/24] [acct_process+434/440] [schedule+21/652] [exit_notify+219/472] [do_exit+46/508]
Nov 11 16:05:08 ds9 kernel: [ip_masq_raudio+75497472/1571520512] [die_if_kernel+695/704] [ip_masq_raudio+83886080/1571520512] [ip_masq_raudio+75497472/1571520512] [tty_set_ldisc+200/448] [do_invalid_op+61/68] [do_invalid_op+0/68] [error_code+64/72]
Nov 11 16:05:08 ds9 kernel: [sock_wfree+35/44] [kfree_skb+183/244] [ip_rcv+1474/1492] [net_bh+252/284] [do_bottom_half+59/96] [handle_bottom_half+11/24] [notify_parent+30/48] [exit_notify+219/472]
Nov 11 16:05:08 ds9 kernel: [do_exit+456/508] [ip_masq_raudio+75497472/1571520512] [die_if_kernel+695/704] [ip_masq_raudio+83886080/1571520512] [ip_masq_raudio+75497472/1571520512] [tty_set_ldisc+200/448] [do_invalid_op+61/68] [do_invalid_op+0/68]
Nov 11 16:05:08 ds9 kernel: [error_code+64/72] [sock_wfree+35/44] [kfree_skb+183/244] [ip_rcv+1474/1492] [net_bh+252/284] [do_bottom_half+59/96] [handle_bottom_half+11/24] [exit_notify+62/472]
Nov 11 16:05:08 ds9 kernel: [do_exit+456/508] [die_if_kernel+695/704] [ip_masq_raudio+83886080/1571520512] [ip_masq_raudio+75497472/1571520512]
Nov 11 16:05:08 ds9 kernel: Code: 00 2c 9c 02 00 04 00 00 00 38 9c 02 00 04 00 00 00 44 9c 02
Nov 11 16:05:08 ds9 kernel: Aiee, killing interrupt handler
Kernel configuration
--------------------
#
# Loadable module support
#
CONFIG_MODULES=y
CONFIG_KERNELD=y
#
# General setup
#
CONFIG_NET=y
CONFIG_PCI=y
CONFIG_SYSVIPC=y
CONFIG_BINFMT_AOUT=y
CONFIG_BINFMT_ELF=y
CONFIG_KERNEL_ELF=y
CONFIG_M586=y
#
# Floppy, IDE, and other block devices
#
CONFIG_BLK_DEV_FD=y
CONFIG_BLK_DEV_IDE=y
#
# Please see Documentation/ide.txt for help/info on IDE drives
#
CONFIG_BLK_DEV_IDECD=y
CONFIG_BLK_DEV_IDEFLOPPY=y
CONFIG_BLK_DEV_CMD640=y
CONFIG_BLK_DEV_RZ1000=y
CONFIG_BLK_DEV_TRITON=y
#
# Additional Block Devices
#
CONFIG_BLK_DEV_LOOP=y
CONFIG_BLK_DEV_MD=y
CONFIG_MD_LINEAR=m
CONFIG_MD_STRIPED=y
#
# Networking options
#
CONFIG_FIREWALL=y
CONFIG_NET_ALIAS=y
CONFIG_INET=y
CONFIG_IP_FORWARD=y
CONFIG_IP_MULTICAST=y
CONFIG_SYN_COOKIES=y
CONFIG_IP_FIREWALL=y
CONFIG_IP_FIREWALL_VERBOSE=y
CONFIG_IP_MASQUERADE=y
#
# Protocol-specific masquerading support will be built as modules.
#
CONFIG_IP_MASQUERADE_ICMP=y
CONFIG_IP_ALWAYS_DEFRAG=y
CONFIG_IP_ACCT=y
CONFIG_IP_ROUTER=y
CONFIG_IP_ALIAS=y
#
# (it is safe to leave these untouched)
#
CONFIG_IP_NOSR=y
CONFIG_SKB_LARGE=y
#
# SCSI support
#
CONFIG_SCSI=y
#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=y
CONFIG_CHR_DEV_ST=y
CONFIG_BLK_DEV_SR=y
CONFIG_CHR_DEV_SG=y
#
# Some SCSI devices (e.g. CD jukebox) support multiple LUNs
#
CONFIG_SCSI_MULTI_LUN=y
CONFIG_SCSI_CONSTANTS=y
#
# SCSI low-level drivers
#
CONFIG_SCSI_AIC7XXX=y
CONFIG_AIC7XXX_RESET_DELAY=5
CONFIG_SCSI_BUSLOGIC=y
#
# Network device support
#
CONFIG_NETDEVICES=y
CONFIG_DUMMY=m
CONFIG_PPP=y
#
# CCP compressors for PPP are only built as modules.
#
CONFIG_NET_ETHERNET=y
CONFIG_NET_VENDOR_3COM=y
CONFIG_EL3=m
CONFIG_VORTEX=y
CONFIG_NET_PCI=y
CONFIG_EEXPRESS_PRO100B=m
CONFIG_DEC_ELCP=m
CONFIG_NET_ISA=y
CONFIG_NE2000=y
#
# Filesystems
#
# CONFIG_QUOTA is not set
CONFIG_MINIX_FS=y
CONFIG_EXT2_FS=y
CONFIG_NLS=y
CONFIG_ISO9660_FS=y
CONFIG_FAT_FS=y
CONFIG_MSDOS_FS=y
CONFIG_NLS_CODEPAGE_437=y
CONFIG_NLS_CODEPAGE_850=y
CONFIG_NLS_ISO8859_1=y
CONFIG_PROC_FS=y
CONFIG_NFS_FS=y
CONFIG_SMB_FS=m
#
# Character devices
#
CONFIG_SERIAL=y
CONFIG_PRINTER=m
CONFIG_MOUSE=y
CONFIG_PSMOUSE=m
CONFIG_WATCHDOG=y
CONFIG_SOFT_WATCHDOG=y
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