Today I've found the following in my /var/log/messages:
Oct 28 20:14:36 some_host kernel: kmem_free: Bad obj addr (objp=c2b381e0, name=size-64)
Oct 28 20:14:36 some_host kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000000
Oct 28 20:14:36 some_host kernel: current->tss.cr3 = 00101000, %cr3 = 00101000
Oct 28 20:14:36 some_host kernel: *pde = 00000000
Oct 28 20:14:36 some_host kernel: Oops: 0002
Oct 28 20:14:36 some_host kernel: CPU: 0
Oct 28 20:14:36 some_host kernel: EIP: 0010:[kfree+377/424]
Oct 28 20:14:36 some_host kernel: EFLAGS: 00010202
Oct 28 20:14:36 some_host kernel: eax: 00000039 ebx: c2fff0e0 ecx: 00000000 edx: 0000003b
Oct 28 20:14:36 some_host kernel: esi: c2b381e0 edi: 00000202 ebp: 0825d1fc esp: c2fc3f80
Oct 28 20:14:36 some_host kernel: ds: 0018 es: 0018 ss: 0018
Oct 28 20:14:36 some_host kernel: Process kswapd (pid: 5, process nr: 5, stackpage=c2fc3000)
Oct 28 20:14:36 some_host kernel: Stack: 00000000 ffffffff c2b3823c c1d8ebc0 c012e6f8 c2b381e0 00000000 00000015
Oct 28 20:14:36 some_host kernel: 00000006 00000001 00000030 00000000 ffffffff c012e9ef 00000019 ffffffff
Oct 28 20:14:36 some_host kernel: c011fb79 00000006 00000030 c2fc2000 c01ac29a c2fc21c1 00000e00 c011fc0b
Oct 28 20:14:36 some_host kernel: Call Trace: [prune_dcache+220/300] [shrink_dcache_memory+35/40] [do_try_to_free_pages+137/184] [tvecs+7290/13632] [kswapd+99/152] [get_options+0/116] [kernel_thread+35/48]
Oct 28 20:14:36 some_host kernel: Code: c7 05 00 00 00 00 00 00 00 00 eb 1b 8d 76 00 56 68 22 c1 1a
Here is some info:
[gosha@gosha gosha]$ uname -a
Linux gosha 2.2.17 #1 Tue Sep 5 00:25:20 EDT 2000 i586 unknown
[gosha@gosha gosha]$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 5
model : 4
model name : Pentium MMX
stepping : 3
cpu MHz : 224.538
fdiv_bug : no
hlt_bug : no
sep_bug : no
f00f_bug : yes
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr mce cx8 mmx
bogomips : 447.28
[gosha@gosha gosha]$ cat /proc/meminfo
total: used: free: shared: buffers: cached:
Mem: 48250880 45023232 3227648 25837568 1007616 18173952
Swap: 101113856 67829760 33284096
MemTotal: 47120 kB
MemFree: 3152 kB
MemShared: 25232 kB
Buffers: 984 kB
Cached: 17748 kB
SwapTotal: 98744 kB
SwapFree: 32504 kB
#
# Automatically generated by make menuconfig: don't edit
#
#
# Code maturity level options
#
CONFIG_EXPERIMENTAL=y
#
# Processor type and features
#
# CONFIG_M386 is not set
# CONFIG_M486 is not set
# CONFIG_M586 is not set
CONFIG_M586TSC=y
# CONFIG_M686 is not set
CONFIG_X86_WP_WORKS_OK=y
CONFIG_X86_INVLPG=y
CONFIG_X86_BSWAP=y
CONFIG_X86_POPAD_OK=y
CONFIG_X86_TSC=y
CONFIG_1GB=y
# CONFIG_2GB is not set
# CONFIG_MATH_EMULATION is not set
# CONFIG_MTRR is not set
# CONFIG_SMP is not set
#
# Loadable module support
#
CONFIG_MODULES=y
CONFIG_MODVERSIONS=y
CONFIG_KMOD=y
#
# General setup
#
CONFIG_NET=y
CONFIG_PCI=y
# CONFIG_PCI_GOBIOS is not set
# CONFIG_PCI_GODIRECT is not set
CONFIG_PCI_GOANY=y
CONFIG_PCI_BIOS=y
CONFIG_PCI_DIRECT=y
CONFIG_PCI_QUIRKS=y
# CONFIG_PCI_OPTIMIZE is not set
CONFIG_PCI_OLD_PROC=y
# CONFIG_MCA is not set
# CONFIG_VISWS is not set
CONFIG_SYSVIPC=y
CONFIG_BSD_PROCESS_ACCT=y
CONFIG_SYSCTL=y
CONFIG_BINFMT_AOUT=y
CONFIG_BINFMT_ELF=y
CONFIG_BINFMT_MISC=y
# CONFIG_BINFMT_JAVA is not set
# CONFIG_PARPORT is not set
# CONFIG_APM is not set
# CONFIG_TOSHIBA is not set
#
# Plug and Play support
#
CONFIG_PNP=y
#
# Block devices
#
CONFIG_BLK_DEV_FD=y
CONFIG_BLK_DEV_IDE=y
# CONFIG_BLK_DEV_HD_IDE is not set
CONFIG_BLK_DEV_IDEDISK=y
CONFIG_BLK_DEV_IDECD=y
# CONFIG_BLK_DEV_IDETAPE is not set
# CONFIG_BLK_DEV_IDEFLOPPY is not set
# CONFIG_BLK_DEV_IDESCSI is not set
# CONFIG_BLK_DEV_CMD640 is not set
# CONFIG_BLK_DEV_RZ1000 is not set
CONFIG_BLK_DEV_IDEPCI=y
CONFIG_BLK_DEV_IDEDMA=y
# CONFIG_BLK_DEV_OFFBOARD is not set
CONFIG_IDEDMA_AUTO=y
# CONFIG_BLK_DEV_OPTI621 is not set
# CONFIG_BLK_DEV_TRM290 is not set
# CONFIG_BLK_DEV_NS87415 is not set
# CONFIG_BLK_DEV_VIA82C586 is not set
# CONFIG_BLK_DEV_CMD646 is not set
# CONFIG_BLK_DEV_CS5530 is not set
# CONFIG_IDE_CHIPSETS is not set
CONFIG_BLK_DEV_LOOP=y
# CONFIG_BLK_DEV_NBD is not set
# CONFIG_BLK_DEV_MD is not set
CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_SIZE=4096
CONFIG_BLK_DEV_INITRD=y
# CONFIG_BLK_DEV_XD is not set
# CONFIG_BLK_DEV_DAC960 is not set
CONFIG_PARIDE_PARPORT=y
# CONFIG_PARIDE is not set
# CONFIG_BLK_CPQ_DA is not set
# CONFIG_BLK_DEV_HD is not set
#
# Networking options
#
CONFIG_PACKET=y
CONFIG_NETLINK=y
# CONFIG_RTNETLINK is not set
CONFIG_NETLINK_DEV=y
# CONFIG_FIREWALL is not set
# CONFIG_FILTER is not set
CONFIG_UNIX=y
CONFIG_INET=y
# CONFIG_IP_MULTICAST is not set
# CONFIG_IP_ADVANCED_ROUTER is not set
# CONFIG_IP_PNP is not set
# CONFIG_IP_ROUTER is not set
# CONFIG_NET_IPIP is not set
# CONFIG_NET_IPGRE is not set
# CONFIG_IP_ALIAS is not set
CONFIG_SYN_COOKIES=y
# CONFIG_INET_RARP is not set
CONFIG_SKB_LARGE=y
# CONFIG_IPV6 is not set
# CONFIG_IPX is not set
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_BRIDGE is not set
# CONFIG_LLC is not set
# CONFIG_ECONET is not set
# CONFIG_WAN_ROUTER is not set
# CONFIG_NET_FASTROUTE is not set
# CONFIG_NET_HW_FLOWCONTROL is not set
# CONFIG_CPU_IS_SLOW is not set
#
# QoS and/or fair queueing
#
# CONFIG_NET_SCHED is not set
#
# Telephony Support
#
# CONFIG_PHONE is not set
# CONFIG_PHONE_IXJ is not set
#
# SCSI support
#
# CONFIG_SCSI is not set
#
# I2O device support
#
# CONFIG_I2O is not set
# CONFIG_I2O_PCI is not set
# CONFIG_I2O_BLOCK is not set
# CONFIG_I2O_SCSI is not set
#
# Network device support
#
CONFIG_NETDEVICES=y
#
# ARCnet devices
#
# CONFIG_ARCNET is not set
CONFIG_DUMMY=m
# CONFIG_BONDING is not set
# CONFIG_EQUALIZER is not set
# CONFIG_ETHERTAP is not set
# CONFIG_NET_SB1000 is not set
#
# Ethernet (10 or 100Mbit)
#
CONFIG_NET_ETHERNET=y
CONFIG_NET_VENDOR_3COM=y
# CONFIG_EL1 is not set
# CONFIG_EL2 is not set
# CONFIG_ELPLUS is not set
# CONFIG_EL16 is not set
# CONFIG_EL3 is not set
# CONFIG_3C515 is not set
CONFIG_VORTEX=m
# CONFIG_LANCE is not set
# CONFIG_NET_VENDOR_SMC is not set
# CONFIG_NET_VENDOR_RACAL is not set
# CONFIG_RTL8139 is not set
# CONFIG_NET_ISA is not set
# CONFIG_NET_EISA is not set
# CONFIG_NET_POCKET is not set
#
# Ethernet (1000 Mbit)
#
# CONFIG_ACENIC is not set
# CONFIG_HAMACHI is not set
# CONFIG_YELLOWFIN is not set
# CONFIG_SK98LIN is not set
# CONFIG_FDDI is not set
# CONFIG_HIPPI is not set
# CONFIG_PPP is not set
# CONFIG_SLIP is not set
# CONFIG_NET_RADIO is not set
#
# Token ring devices
#
# CONFIG_TR is not set
# CONFIG_NET_FC is not set
# CONFIG_RCPCI is not set
# CONFIG_SHAPER is not set
#
# Wan interfaces
#
# CONFIG_HOSTESS_SV11 is not set
# CONFIG_COSA is not set
# CONFIG_SEALEVEL_4021 is not set
# CONFIG_SYNCLINK_SYNCPPP is not set
# CONFIG_LANMEDIA is not set
# CONFIG_COMX is not set
# CONFIG_HDLC is not set
# CONFIG_DLCI is not set
# CONFIG_SBNI is not set
#
# Amateur Radio support
#
# CONFIG_HAMRADIO is not set
#
# IrDA (infrared) support
#
# CONFIG_IRDA is not set
#
# ISDN subsystem
#
# CONFIG_ISDN is not set
#
# Old CD-ROM drivers (not SCSI, not IDE)
#
# CONFIG_CD_NO_IDESCSI is not set
#
# Character devices
#
CONFIG_VT=y
CONFIG_VT_CONSOLE=y
CONFIG_SERIAL=y
# CONFIG_SERIAL_CONSOLE is not set
# CONFIG_SERIAL_EXTENDED is not set
# CONFIG_SERIAL_NONSTANDARD is not set
CONFIG_UNIX98_PTYS=y
CONFIG_UNIX98_PTY_COUNT=256
# CONFIG_MOUSE is not set
#
# Joysticks
#
# CONFIG_JOYSTICK is not set
# CONFIG_QIC02_TAPE is not set
# CONFIG_WATCHDOG is not set
# CONFIG_NVRAM is not set
# CONFIG_RTC is not set
#
# Video For Linux
#
# CONFIG_VIDEO_DEV is not set
# CONFIG_DTLK is not set
#
# Ftape, the floppy tape device driver
#
# CONFIG_FTAPE is not set
#
# Filesystems
#
# CONFIG_QUOTA is not set
CONFIG_AUTOFS_FS=y
# CONFIG_ADFS_FS is not set
# CONFIG_AFFS_FS is not set
# CONFIG_HFS_FS is not set
CONFIG_FAT_FS=y
# CONFIG_MSDOS_FS is not set
# CONFIG_UMSDOS_FS is not set
CONFIG_VFAT_FS=y
CONFIG_ISO9660_FS=y
# CONFIG_JOLIET is not set
# CONFIG_MINIX_FS is not set
# CONFIG_NTFS_FS is not set
# CONFIG_HPFS_FS is not set
CONFIG_PROC_FS=y
CONFIG_DEVPTS_FS=y
# CONFIG_QNX4FS_FS is not set
# CONFIG_ROMFS_FS is not set
CONFIG_EXT2_FS=y
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set
# CONFIG_EFS_FS is not set
#
# Network File Systems
#
# CONFIG_CODA_FS is not set
# CONFIG_NFS_FS is not set
# CONFIG_NFSD is not set
# CONFIG_SUNRPC is not set
# CONFIG_LOCKD is not set
# CONFIG_SMB_FS is not set
# CONFIG_NCP_FS is not set
#
# Partition Types
#
# CONFIG_BSD_DISKLABEL is not set
# CONFIG_MAC_PARTITION is not set
# CONFIG_SMD_DISKLABEL is not set
# CONFIG_SOLARIS_X86_PARTITION is not set
# CONFIG_UNIXWARE_DISKLABEL is not set
CONFIG_NLS=y
#
# Native Language Support
#
CONFIG_NLS_DEFAULT="cp437"
# CONFIG_NLS_CODEPAGE_437 is not set
# CONFIG_NLS_CODEPAGE_737 is not set
# CONFIG_NLS_CODEPAGE_775 is not set
# CONFIG_NLS_CODEPAGE_850 is not set
# CONFIG_NLS_CODEPAGE_852 is not set
# CONFIG_NLS_CODEPAGE_855 is not set
# CONFIG_NLS_CODEPAGE_857 is not set
# CONFIG_NLS_CODEPAGE_860 is not set
# CONFIG_NLS_CODEPAGE_861 is not set
# CONFIG_NLS_CODEPAGE_862 is not set
# CONFIG_NLS_CODEPAGE_863 is not set
# CONFIG_NLS_CODEPAGE_864 is not set
# CONFIG_NLS_CODEPAGE_865 is not set
# CONFIG_NLS_CODEPAGE_866 is not set
# CONFIG_NLS_CODEPAGE_869 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
# CONFIG_NLS_CODEPAGE_932 is not set
# CONFIG_NLS_CODEPAGE_936 is not set
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_950 is not set
# CONFIG_NLS_ISO8859_1 is not set
# CONFIG_NLS_ISO8859_2 is not set
# CONFIG_NLS_ISO8859_3 is not set
# CONFIG_NLS_ISO8859_4 is not set
# CONFIG_NLS_ISO8859_5 is not set
# CONFIG_NLS_ISO8859_6 is not set
# CONFIG_NLS_ISO8859_7 is not set
# CONFIG_NLS_ISO8859_8 is not set
# CONFIG_NLS_ISO8859_9 is not set
# CONFIG_NLS_ISO8859_14 is not set
# CONFIG_NLS_ISO8859_15 is not set
CONFIG_NLS_KOI8_R=m
#
# Console drivers
#
CONFIG_VGA_CONSOLE=y
# CONFIG_VIDEO_SELECT is not set
# CONFIG_MDA_CONSOLE is not set
# CONFIG_FB is not set
#
# Sound
#
CONFIG_SOUND=m
# CONFIG_SOUND_CMPCI is not set
# CONFIG_SOUND_CS4281 is not set
# CONFIG_SOUND_FUSION is not set
# CONFIG_SOUND_EMU10K1 is not set
# CONFIG_SOUND_ES1370 is not set
# CONFIG_SOUND_ES1371 is not set
# CONFIG_SOUND_MAESTRO is not set
# CONFIG_SOUND_ESSSOLO1 is not set
# CONFIG_SOUND_ICH is not set
# CONFIG_SOUND_SONICVIBES is not set
# CONFIG_SOUND_TRIDENT is not set
# CONFIG_SOUND_MSNDCLAS is not set
# CONFIG_SOUND_MSNDPIN is not set
CONFIG_SOUND_OSS=m
# CONFIG_SOUND_PAS is not set
CONFIG_SOUND_SB=m
# CONFIG_SOUND_GUS is not set
# CONFIG_SOUND_MPU401 is not set
# CONFIG_SOUND_PSS is not set
# CONFIG_SOUND_MSS is not set
# CONFIG_SOUND_SSCAPE is not set
# CONFIG_SOUND_TRIX is not set
# CONFIG_SOUND_VIA82CXXX is not set
# CONFIG_SOUND_MAD16 is not set
# CONFIG_SOUND_WAVEFRONT is not set
# CONFIG_SOUND_CS4232 is not set
# CONFIG_SOUND_OPL3SA2 is not set
# CONFIG_SOUND_MAUI is not set
# CONFIG_SOUND_SGALAXY is not set
# CONFIG_SOUND_AD1816 is not set
# CONFIG_SOUND_OPL3SA1 is not set
# CONFIG_SOUND_SOFTOSS is not set
CONFIG_SOUND_YM3812=m
# CONFIG_SOUND_VMIDI is not set
# CONFIG_SOUND_UART6850 is not set
# CONFIG_SOUND_NM256 is not set
# CONFIG_SOUND_YMPCI is not set
#
# Additional low level sound drivers
#
CONFIG_LOWLEVEL_SOUND=y
# CONFIG_ACI_MIXER is not set
# CONFIG_VIDEO_MSP3400 is not set
CONFIG_AWE32_SYNTH=m
# CONFIG_AEDSP16 is not set
#
# Kernel hacking
#
# CONFIG_MAGIC_SYSRQ is not set