Kernel Panic while building IP or TCP hash tables

[Gérard Guével]

Hello,

I'm running the Elinos 2.4.18 linux kernel on a custom 8260 board.

I have the following kernel panic only if I receive a broadcast or
unicast frame while the system is building the IP routing cache hash
table or the TCP hash tables.

Since I can see the start of the "IP: routing ..." string, I think
the kernel panic occurs before the TCP phase if the printk is,
as I suppose, a blocking (synchronized ?) write function.

...
eth0: FCC ENET Version 0.3, 00:10:cd:31:18:20
eth1: FCC ENET Version 0.3, 00:10:cd:31:18:21
eth2: FCC ENET Version 0.3, 00:10:cd:31:18:22
loop: loaded (max 8 devices)
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP, IGMP
IP: routing <4>Oops: kernel access of bad area, sig: 11
NIP: C0090A9C XER: 00000000 LR: C0093528 SP: C0599CA0 REGS: c0599bf0 TRAP:
0300d
MSR: 00009032 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 11
DAR: 75DCDC7A, DSISR: 20000000
TASK = c0598000[1] 'swapper' Last syscall: 120
last math 00000000 last altivec 00000000
GPR00: 00222298 C0599CA0 C0598000 C05B4080 A8020B0D A8020A0D 00000000
00000003
GPR08: C0120000 C0100000 75DCDBFE C0100000 0000000D 0006B270 AAA96041
FF010000
GPR16: 00008149 0A114000 FF010000 41DA5241 00001032 000000BD 0000012B
C00F5040
GPR24: 0000012C C05B8400 C05B84DC C05B8400 A8020A0D 00000000 C05B4080
A8020B0D
Call backtrace:
00000000 C0093528 C0084C20 C00181E0 C00070D8 C0005F2C 73747576
000081A4 C0012DA4 C0012E3C C0012F5C C00132A0 C0013194 C00FEAF0
C00FED54 C00FF5DC C00F67A0 C00F739C C0005B00 C000848C
Kernel panic: Aiee, killing interrupt handler!

For information the right start is like :
...
eth0: FCC ENET Version 0.3, 00:10:cd:31:17:a0
eth1: FCC ENET Version 0.3, 00:10:cd:31:17:a1
eth2: FCC ENET Version 0.3, 00:10:cd:31:17:a2
loop: loaded (max 8 devices)
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP, IGMP
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP: Hash tables configured (established 2048 bind 2048)
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
VFS: Mounted root (ramfs filesystem).
UNTAR: Extracting root archive: do..
init started:  BusyBox v0.60.5 (2003î2.20-13:09+0000) multi-call


Thanks in advance
Gérard


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