hi lkml,
	I just built 2.4.3-ac3 with my old 2.4.2 .config and somehow networking does not work. 
dhclient eventually froze the machine.

here is what dhclient complains.

[root@psubash linux]# cat /tmp/error.txt
skb: pf=2 (unowned) dev=lo len=328
PROTO=17 0.0.0.0:68 255.255.255.255:67 L=328 S=0x10 I=0 F=0x0000 T=16
DHCPDISCOVER on lo to 255.255.255.255 port 67 interval 14
ip_local_deliver: bad loopback skb: PRE_ROUTING LOCAL_IN
skb: pf=2 (unowned) dev=lo len=328
PROTO=17 0.0.0.0:68 255.255.255.255:67 L=328 S=0x10 I=0 F=0x0000 T=16
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 9
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 7
DHCPDISCOVER on lo to 255.255.255.255 port 67 interval 12
ip_local_deliver: bad loopback skb: PRE_ROUTING LOCAL_IN
skb: pf=2 (unowned) dev=lo len=328

Here is my ver_linux info

[root@psubash linux]# cat /tmp/ver_linux
If some fields are empty or look unusual you may have an old version.
Compare to the current minimal requirements in Documentation/Changes.

Linux psubash 2.4.3-ac3 #3 Wed Apr 4 16:49:40 PDT 2001 i686 unknown

Gnu C                  2.95.2.1
Gnu make               3.79.1
binutils               2.10.1
util-linux             2.11a
mount                  2.11a
modutils               2.3.24
e2fsprogs              1.20-WIP
pcmcia-cs              3.1.24
PPP                    2.3.11
Linux C Library        2.1.3
Dynamic linker (ldd)   2.1.3
Linux C++ Library      ..
Procps                 2.0.6
Net-tools              1.55
Console-tools          0.3.3
Sh-utils               2.0
Modules Loaded         3c59x


Here is the output of lspci.

[root@psubash linux]# lspci  -v
00:00.0 Host bridge: Intel Corporation 440BX/ZX - 82443BX/ZX Host bridge (rev 03)
        Flags: bus master, medium devsel, latency 64
        Memory at f8000000 (32-bit, prefetchable)
        Capabilities: [a0] AGP version 1.0

00:01.0 PCI bridge: Intel Corporation 440BX/ZX - 82443BX/ZX AGP bridge (rev 03) (prog-if 00 [Normal decode])
        Flags: bus master, 66Mhz, medium devsel, latency 128
        Bus: primary=00, secondary=01, subordinate=01, sec-latency=64
        Memory behind bridge: f4100000-f4ffffff
        Prefetchable memory behind bridge: fc000000-fdffffff

00:07.0 ISA bridge: Intel Corporation 82371AB PIIX4 ISA (rev 02)
        Flags: bus master, medium devsel, latency 0

00:07.1 IDE interface: Intel Corporation 82371AB PIIX4 IDE (rev 01) (prog-if 80 [Master])
        Flags: bus master, medium devsel, latency 64
        I/O ports at 10c0

00:07.2 USB Controller: Intel Corporation 82371AB PIIX4 USB (rev 01) (prog-if 00 [UHCI])
        Flags: bus master, medium devsel, latency 64, IRQ 9
        I/O ports at 1080

00:07.3 Bridge: Intel Corporation 82371AB PIIX4 ACPI (rev 02)
        Flags: medium devsel

00:0e.0 Multimedia audio controller: Creative Labs SB Live! EMU10000 (rev 07)
        Subsystem: Creative Labs CT4832 SBLive! Value
        Flags: bus master, medium devsel, latency 64, IRQ 10
        I/O ports at 10a0
        Capabilities: [dc] Power Management version 1

00:0e.1 Input device controller: Creative Labs SB Live! (rev 07)
        Subsystem: Creative Labs Gameport Joystick
        Flags: bus master, medium devsel, latency 64
        I/O ports at 10d0
        Capabilities: [dc] Power Management version 1

00:0f.0 Ethernet controller: 3Com Corporation 3c905B 100BaseTX [Cyclone] (rev 30)
        Subsystem: 3Com Corporation 3C905B Fast Etherlink XL 10/100
        Flags: bus master, medium devsel, latency 80, IRQ 5
        I/O ports at 1000
        Memory at f4000000 (32-bit, non-prefetchable)
        Capabilities: [dc] Power Management version 1

01:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G400 AGP (rev 04) (prog-if 00 [VGA])
        Subsystem: Matrox Graphics, Inc. Millennium G400 16Mb SDRAM
        Flags: bus master, medium devsel, latency 128, IRQ 11
        Memory at fc000000 (32-bit, prefetchable)
        Memory at f4100000 (32-bit, non-prefetchable)
        Memory at f4800000 (32-bit, non-prefetchable)
        Capabilities: [dc] Power Management version 2
        Capabilities: [f0] AGP version 2.0




I have also attached my .config.


thanks,
Prasanna Subash
psubash@turbolinux.com