kernel bug in 2.4.18-11

Out of Memory: Killed process 26742 (gnome-terminal).
Trying to vfree() nonexistent vm area (da4dd000)
cf075e9c cf075eb8 c01087f1 a939f030 a939efd0 cf074560 d503bcc0 00000000
       cf074000 cf075ed4 c0119159 d503bcc0 d75e53b8 d503bcc0 cf075ef0 c011dd69
       d503bcc0 d75e53b8 cf074000 00000000 cf075f30 cf075f10 c0123f1e 00000009
Call Trace: [<c01087f1>] setup_sigcontext [kernel] 0xe1 (0xcf075ea4))
[<c0119159>] mmput [kernel] 0x39 (0xcf075ec4))
[<c011dd69>] do_exit [kernel] 0xa9 (0xcf075ed8))
[<c0123f1e>] sig_exit [kernel] 0xae (0xcf075ef4))
[<c0109065>] do_signal [kernel] 0x205 (0xcf075f14))
[<c012453e>] deliver_signal [kernel] 0x2e (0xcf075f60))
[<c0109dc0>] do_general_protection [kernel] 0x0 (0xcf075f9c))
[<c01249a0>] force_sig [kernel] 0x20 (0xcf075fa4))
[<c0109dc0>] do_general_protection [kernel] 0x0 (0xcf075fb8))
[<c0109308>] signal_return [kernel] 0x14 (0xcf075fc0))

I'll Bugzilla this iff people think I should, and I have the time.
My PC is an Athlon 850, mixed IDE / SCSI, proc/modules says:

hfs                    90464   0
nls_iso8859-1           3516   0 (autoclean)
nls_cp437               5148   0 (autoclean)
vfat                   12780   0 (autoclean)
fat                    39160   0 (autoclean) [vfat]
reiserfs              196208   1 (autoclean)
sg                     35788   0 (autoclean)
sr_mod                 17912   0 (autoclean)
es1371                 30536   0 (autoclean)
ac97_codec             13320   0 (autoclean) [es1371]
gameport                3428   0 (autoclean) [es1371]
soundcore               6500   4 (autoclean) [es1371]
nfs                    82116   1 (autoclean)
lockd                  57520   1 (autoclean) [nfs]
sunrpc                 79036   1 (autoclean) [nfs lockd]
mga                   106784   2
agpgart                43136   3
binfmt_misc             7460   1
autofs                 13300   7 (autoclean)
eepro100               22424   1
iptable_filter          2412   0 (autoclean) (unused)
ip_tables              14744   1 [iptable_filter]
ide-cd                 33316   0 (autoclean)
cdrom                  32992   0 (autoclean) [sr_mod ide-cd]
loop                   12024   0 (autoclean)
mousedev                5492   1
keybdev                 2976   0 (unused)
hid                    22052   0 (unused)
input                   5856   0 [mousedev keybdev hid]
usb-uhci               25996   0 (unused)
usbcore                76640   1 [hid usb-uhci]
ext3                   80680   6
jbd                    52148   6 [ext3]
mbcache                 6608   1 [ext3]
lvm-mod                63680  16
aic7xxx               136820   3
sd_mod                 13584   6
scsi_mod              106728   4 [sg sr_mod aic7xxx sd_mod]