HP Netserver 2000 with 2 onboard e100 NICs. Both are connected to the same hub.
Add both eth0 and eth1 to the same bridge. Pull the plug on eth0. Wait till the bridge is about to enter forwarding state on eth1.
I have reproduced this with earlier kernels (2.4.20+) too but they were heavily patched. This is a pristine 2.4.22.
Strange but true: This works when using eepro100 insted of e100.
details: uml:~# brctl addbr br0 uml:~# brctl stp on uml:~# brctl addif br0 eth0 uml:~# ip link set eth0 up uml:~# brctl addif br0 eth1 uml:~# brctl setpathcost br0 eth1 1000 uml:~# ip link set eth1 up uml:~# tail /var/log/kern.log [junk deleted] Aug 27 17:07:44 uml kernel: device eth1 entered promiscuous mode Aug 27 17:08:43 uml kernel: br0: port 2(eth1) entering listening state Aug 27 17:08:44 uml kernel: eth0: received packet with own address as source address Aug 27 17:08:44 uml kernel: br0: port 2(eth1) entering blocking state Aug 27 17:08:45 uml kernel: e100: eth1 NIC Link is Up 100 Mbps Half duplex
pull the plug on eth0
uml:~# tail -f /var/log/kern.log Aug 27 17:12:11 uml kernel: e100: eth0 NIC Link is Down Aug 27 17:12:30 uml kernel: br0: neighbour 8000.00:30:6e:12:dc:5d lost on port 2(eth1) [00:30:6e:12:dc:5d is the MAC-address of eth0] Aug 27 17:12:30 uml kernel: br0: port 2(eth1) entering listening state Aug 27 17:12:45 uml kernel: br0: port 2(eth1) entering learning state
and then:
uml:~# ksymoops oops.txt
ksymoops 2.4.8 on i686 2.4.22. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.4.22/ (default)
-m /boot/System.map-2.4.22 (default)Warning: You did not tell me where to find symbol information. I will assume that the log matches the kernel and modules that are running right now and I'll use the default options above for symbol resolution. If the current kernel and/or modules do not match the log, you can get more accurate output by telling me the kernel version and where to find map, modules, ksyms etc. ksymoops -h explains the options.
kernel BUG at dev.c:991!
invalid operand: 0000
CPU: 0
EIP: 0010:[<c0284b29>] Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010202
eax: 0000822b ebx: ce55d73c ecx: dfcca25c edx: 000000a8
esi: 00008229 edi: c49ca830 ebp: cf00e000 esp: c038fde0
ds: 0018 es: 0018 ss: 0018
Process swapper (pid: 0, stackpage=c038f000)
Stack: ce55d73c 0000000e 000000a8 dfcca25c cef50400 ce55d73c 00000000 c0284f25
ce55d73c cfec1274 cfd46034 00003122 00003122 00000296 ce55d73c ce55d73c
cefe64bc cf00e000 d0a112de ce55d73c 00000000 cef42c9c 00000000 d0a1132b
Call Trace: [<c0284f25>] [<d0a112de>] [<d0a1132b>] [<d0a11503>]
[<d0a113d0>]
[<d0a115e7>] [<d0a113d0>] [<d0a12137>] [<d0a122d9>] [<c0285511>]
[<c02856dd>]
[<c0285845>] [<c0127436>] [<c010b64d>] [<c0118de8>] [<c0107170>]
[<c0107170>]
[<c010e458>] [<c0107170>] [<c010719c>] [<c0107232>] [<c0105000>]
Code: 0f 0b df 03 cd 82 2f c0 89 c8 c1 e0 10 81 e1 00 00 ff ff 01EIP; c0284b29 <skb_checksum_help+59/a0> <=====
ebx; ce55d73c <_end+e138f5c/105dc880> edi; c49ca830 <_end+45a6050/105dc880> ebp; cf00e000 <_end+ebe9820/105dc880> esp; c038fde0 <init_task_union+1de0/2000>
Trace; c0284f25 <dev_queue_xmit+3b5/430> Trace; d0a112de <[bridge]__dev_queue_push_xmit+2e/60> Trace; d0a1132b <[bridge]__br_forward_finish+1b/60> Trace; d0a11503 <[bridge]br_flood+53/e0> Trace; d0a113d0 <[bridge]__br_forward+0/60> Trace; d0a115e7 <[bridge]br_flood_forward+27/30> Trace; d0a113d0 <[bridge]__br_forward+0/60> Trace; d0a12137 <[bridge]br_handle_frame_finish+107/180> Trace; d0a122d9 <[bridge]br_handle_frame+129/1dc> Trace; c0285511 <netif_receive_skb+c1/200> Trace; c02856dd <process_backlog+8d/130> Trace; c0285845 <net_rx_action+c5/180> Trace; c0127436 <do_softirq+d6/e0> Trace; c010b64d <do_IRQ+19d/1d0> Trace; c0118de8 <smp_apic_timer_interrupt+128/130> Trace; c0107170 <default_idle+0/50> Trace; c0107170 <default_idle+0/50> Trace; c010e458 <call_do_IRQ+5/d> Trace; c0107170 <default_idle+0/50> Trace; c010719c <default_idle+2c/50> Trace; c0107232 <cpu_idle+52/70> Trace; c0105000 <_stext+0/0>
Code; c0284b29 <skb_checksum_help+59/a0> 00000000 <_EIP>: Code; c0284b29 <skb_checksum_help+59/a0> <===== 0: 0f 0b ud2a <===== Code; c0284b2b <skb_checksum_help+5b/a0> 2: df 03 fild (%ebx) Code; c0284b2d <skb_checksum_help+5d/a0> 4: cd 82 int $0x82 Code; c0284b2f <skb_checksum_help+5f/a0> 6: 2f das Code; c0284b30 <skb_checksum_help+60/a0> 7: c0 89 c8 c1 e0 10 81 rorb $0x81,0x10e0c1c8(%ecx) Code; c0284b37 <skb_checksum_help+67/a0> e: e1 00 loope 10 <_EIP+0x10> Code; c0284b39 <skb_checksum_help+69/a0> 10: 00 ff add %bh,%bh Code; c0284b3b <skb_checksum_help+6b/a0> 12: ff 01 incl (%ecx)
<0>Kernel panic: Aiee, killing interrupt handler!
1 warning issued. Results may not be reliable.
uml:~# lspci 00:00.0 Host bridge: ServerWorks CNB20LE Host Bridge (rev 06) 00:00.1 Host bridge: ServerWorks CNB20LE Host Bridge (rev 06) 00:02.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100] (rev 08) 00:07.0 VGA compatible controller: ATI Technologies Inc Rage XL (rev 27) 00:08.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100] (rev 08) 00:0f.0 ISA bridge: ServerWorks OSB4 South Bridge (rev 50) 00:0f.1 IDE interface: ServerWorks OSB4 IDE Controller 00:0f.2 USB Controller: ServerWorks OSB4/CSB5 OHCI USB Controller (rev 04) 01:02.0 Ethernet controller: 3Com Corporation 3c905B 100BaseTX [Cyclone] (rev 34) 01:03.0 Unknown mass storage controller: American Megatrends Inc. MegaRAID 428 Ultra RAID Controller (rev 03) 01:05.0 SCSI storage controller: LSI Logic / Symbios Logic 53c1010 Ultra3 SCSI Adapter (rev 01) 01:05.1 SCSI storage controller: LSI Logic / Symbios Logic 53c1010 Ultra3 SCSI Adapter (rev 01)
when e100 loaded it said: Intel(R) PRO/100 Network Driver - version 2.3.18-k1 Copyright (c) 2003 Intel Corporation
e100: selftest OK. e100: eth0: Intel(R) PRO/100 Network Connection Hardware receive checksums enabled cpu cycle saver enabled
e100: selftest OK. e100: eth1: Intel(R) PRO/100 Network Connection Hardware receive checksums enabled cpu cycle saver enabled
uml:~# lsmod Module Size Used by Not tainted tun 4864 23 (autoclean) ipt_LOG 3640 4 (autoclean) iptable_mangle 2168 0 (autoclean) (unused) iptable_filter 1740 1 (autoclean) ip_tables 13408 3 [ipt_LOG iptable_mangle iptable_filter] 3c59x 28944 1 (autoclean) ^^^^^ this is eth2 e100 54888 1 (autoclean) bridge 22576 3 (autoclean) usb-ohci 21512 0 (unused) rtc 9256 0 (autoclean)
Any thoughts ?
Hannes
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