Kernel panic что бы это могло быть?

Редко но метко виснет линух Debian 3.0. Ядро 2.4.18
Периодически виснет с выкидыванием таких сообщений

Sep 7 19:14:25 gaz kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000018
Sep 7 19:14:25 gaz kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000018
Sep 7 19:14:25 gaz kernel: printing eip:
Sep 7 19:14:25 gaz kernel: c0137906
Sep 7 19:14:25 gaz kernel: *pde = 00000000
Sep 7 19:14:25 gaz kernel: *pde = 00000000
Sep 7 19:14:25 gaz kernel: Oops: 0002
Sep 7 19:14:25 gaz kernel: CPU: 0
Sep 7 19:14:25 gaz kernel: EIP: 0010:[pipe_release+34/136] Tainted: P
Sep 7 19:14:25 gaz kernel: EFLAGS: 00010246
Sep 7 19:14:25 gaz kernel: eax: 00000000 ebx: 00000000 ecx: c1170488 edx: 00000001
Sep 7 19:14:25 gaz kernel: esi: c1170420 edi: c1106250 ebp: c374fb30 esp: c369be98
Sep 7 19:14:25 gaz kernel: ds: 0018 es: 0018 ss: 0018
Sep 7 19:14:25 gaz kernel: Process uux (pid: 29150, stackpage=c369b000)
Sep 7 19:14:25 gaz kernel: Stack: c3f0a510 c1170420 c0137979 c1170420 00000001 00000000 c0130a94 c1170420
Sep 7 19:14:25 gaz kernel: c3f0a510 c3f0a510 00000000 c1beb050 00000001 c012fb0b c3f0a510 c1beb050
Sep 7 19:14:25 gaz kernel: 00000000 c3f0a510 00000000 00000007 00000000 c0117b18 c3f0a510 c1beb050
Sep 7 19:14:25 gaz kernel: Call Trace: [pipe_read_release+13/20] [fput+76/208] [filp_close+91/100] [put_files_struct+84/184] [do_exit+169/456]
Sep 7 19:14:25 gaz kernel: [do_signal+547/652] [sys_execve+76/88] [signal_return+20/24]
Sep 7 19:14:25 gaz kernel:
Sep 7 19:14:25 gaz kernel: Code: 29 50 18 8b 86 f4 00 00 00 29 58 1c 8b 9e f4 00 00 00 83 7b
Sep 7 19:23:01 gaz /USR/SBIN/CRON[29163]: (mail) CMD ( if [ -x /usr/sbin/exim -a -f /etc/exim/exim.conf ]; then /usr/sbin/exim -q ; fi)
Sep 7 19:23:01 gaz kernel: <1>Unable to handle kernel NULL pointer dereference at virtual address 00000018
Sep 7 19:23:01 gaz kernel: printing eip:
Sep 7 19:23:01 gaz kernel: c0137906
Sep 7 19:23:01 gaz kernel: *pde = 00000000
Sep 7 19:23:01 gaz kernel: *pde = 00000000
Sep 7 19:23:01 gaz kernel: Oops: 0002
Sep 7 19:23:01 gaz kernel: CPU: 0
Sep 7 19:23:01 gaz kernel: EIP: 0010:[pipe_release+34/136] Tainted: P
Sep 7 19:23:01 gaz kernel: EFLAGS: 00010246
Sep 7 19:23:01 gaz kernel: eax: 00000000 ebx: 00000001 ecx: c365e138 edx: 00000000
Sep 7 19:23:01 gaz kernel: esi: c365e0d0 edi: c1106250 ebp: c1d9c9e0 esp: c32abf30
Sep 7 19:23:01 gaz kernel: ds: 0018 es: 0018 ss: 0018
Sep 7 19:23:01 gaz kernel: Process sh (pid: 29163, stackpage=c32ab000)
Sep 7 19:23:01 gaz kernel: Stack: c1642900 c365e0d0 c013798d c365e0d0 00000000 00000001 c0130a94 c365e0d0
Sep 7 19:23:01 gaz kernel: c1642900 c1642900 00000000 c04df3c0 00000001 c012fb0b c1642900 c04df3c0
Sep 7 19:23:01 gaz kernel: 00000000 c1642900 00000000 00000001 00000002 c0117b18 c1642900 c04df3c0
Sep 7 19:23:01 gaz kernel: Call Trace: [pipe_write_release+13/20] [fput+76/208] [filp_close+91/100] [put_files_struct+84/184] [do_exit+169/456]
Sep 7 19:23:01 gaz kernel: [sys_exit+14/16] [system_call+51/56]
Sep 7 19:23:01 gaz kernel:
Sep 7 19:23:01 gaz kernel: Code: 29 50 18 8b 86 f4 00 00 00 29 58 1c 8b 9e f4 00 00 00 83 7b

На линухе работает маскарадинг