(NOTE: I attempted to post this yesterday, however I was having e-mail problems and it looks like this message did not make it. I looked in the list archives and did not see this message so I am reposting it as I assume it did not get posted the first time. While I'm at it, I'll edit what I said to make it clearer.)
I can repeatably kernel panic my Cent OS 4.5 server running Shorewall version 4.0.5. I can accomplish this by connecting via NFS from another computer to this box, then as I start to browse around (NFS client is Mac OSX 10.5) Linux crashes with Caps Lock and Scroll Lock flashing. The log entry is included below. When I _stop_ shorewall (after a reboot), Linux does _not_ panic when the same above actions are performed (connecting/browsing via NFS). I'm not sure if the problem is with Shorewall or Linux. Thus my question: Do I report this issue here or to the CentOS people? Perhaps of note is that at each panic, Shorewall reports a different SPT and DPT. Below are the relevant messages from /var/log/messages (looks like they got line-wrapped, sorry): Nov 13 09:47:16 hydrogen kernel: Shorewall:fw2loc:REJECT:IN= OUT=eth0 SRC=192.168.0.1 DST=192.168.0.10 LEN=128 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=943 DPT=1007 LEN=108 Nov 13 09:47:16 hydrogen kernel: RPC: sendmsg returned error 1 Nov 13 09:47:16 hydrogen kernel: Shorewall:fw2loc:REJECT:IN= OUT=eth0 SRC=192.168.0.1 DST=192.168.0.10 LEN=148 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=943 DPT=1007 LEN=128 Nov 13 09:47:16 hydrogen kernel: RPC: sendmsg returned error 1 Nov 13 09:47:16 hydrogen kernel: ------------[ cut here ]------------ Nov 13 09:47:16 hydrogen kernel: kernel BUG at fs/lockd/host.c:252! Nov 13 09:47:16 hydrogen kernel: invalid operand: 0000 [#1] Nov 13 09:47:16 hydrogen kernel: SMP Nov 13 09:47:16 hydrogen kernel: Modules linked in: mga nfsd exportfs lockd nfs_acl parport_pc lp parport i2c_dev i2c_core iptable_raw ipt_ULOG ipt_ttl ipt_TOS ipt_tos ipt_TCPMSS ipt_tcpmss ipt_state ipt_sctp ipt_SAME ipt_REJECT ipt_REDIRECT ipt_recent ipt_realm ipt_pkttype ipt_physdev ipt_owner ipt_NOTRACK ipt_NETMAP ipt_multiport ipt_MASQUERADE ipt_MARK ipt_mark ipt_mac ipt_LOG ipt_limit ipt_length ipt_iprange ipt_helper ipt_esp ipt_ECN ipt_ecn ipt_DSCP ipt_dscp ipt_conntrack ipt_comment ipt_CLASSIFY ipt_ah ipt_addrtype ip_nat_tftp ip_nat_snmp_basic ip_nat_irc ip_nat_ftp ip_nat_amanda ip_conntrack_tftp ip_conntrack_irc ip_conntrack_ftp ip_conntrack_amanda iptable_nat ip_conntrack iptable_mangle sunrpc md5 ipv6 iptable_filter ip_tables loop button battery ac uhci_hcd hw_random tulip r8169 floppy dm_snapshot dm_zero dm_mirror ext3 jbd dm_mod ata_piix libata aic7xxx sd_mod scsi_mod Nov 13 09:47:16 hydrogen kernel: CPU: 1 Nov 13 09:47:16 hydrogen kernel: EIP: 0060:[<e0bd88f5>] Not tainted VLI Nov 13 09:47:16 hydrogen kernel: EFLAGS: 00010286 (2.6.9-55.0.12.ELsmp) Nov 13 09:47:16 hydrogen kernel: EIP is at nlm_release_host+0x2b/0x35 [lockd] Nov 13 09:47:16 hydrogen kernel: eax: ffffffff ebx: df96db80 ecx: dff76a80 edx: c1000000 Nov 13 09:47:16 hydrogen kernel: esi: d925af78 edi: d06c2524 ebp: d925ae5c esp: d925ae38 Nov 13 09:47:16 hydrogen kernel: ds: 007b es: 007b ss: 0068 Nov 13 09:47:16 hydrogen kernel: Process lockd (pid: 3552, threadinfo=d925a000 task=df6b4eb0) Nov 13 09:47:16 hydrogen kernel: Stack: d06c2400 e0bdedc2 df96db80 0000000c dff54200 dff54400 d925af78 dff54200 Nov 13 09:47:16 hydrogen kernel: e0bde928 73040000 0120709c 00000000 00000000 00000000 00000000 00000000 Nov 13 09:47:16 hydrogen kernel: 00000000 00000008 00000000 00000000 00000000 00000000 00000000 00000000 Nov 13 09:47:16 hydrogen kernel: Call Trace: Nov 13 09:47:16 hydrogen kernel: [<e0bdedc2>] nlm4svc_callback+0x7f/0x8d [lockd] Nov 13 09:47:16 hydrogen kernel: [<e0bde928>] nlm4svc_proc_lock_msg+0x4a/0x55 [lockd] Nov 13 09:47:16 hydrogen kernel: [<e0bddb41>] nlm4svc_decode_lockargs+0x7d/0x104 [lockd] Nov 13 09:47:16 hydrogen kernel: [<e0bddac4>] nlm4svc_decode_lockargs+0x0/0x104 [lockd] Nov 13 09:47:16 hydrogen kernel: [<e0bd8c6f>] nlmsvc_dispatch+0x7c/0x122 [lockd] Nov 13 09:47:16 hydrogen kernel: [<e0a9961b>] svc_process+0x432/0x6e3 [sunrpc] Nov 13 09:47:16 hydrogen kernel: [<e0bd8e98>] lockd+0x183/0x270 [lockd] Nov 13 09:47:16 hydrogen kernel: [<e0bd8d15>] lockd+0x0/0x270 [lockd] Nov 13 09:47:16 hydrogen kernel: [<c01041f5>] kernel_thread_helper +0x5/0xb Nov 13 09:47:16 hydrogen kernel: Code: 53 85 c0 89 c3 74 2c 80 3d dc 61 ab e0 00 79 10 8d 40 18 50 68 d4 f3 bd e0 e8 0a a0 54 df 59 58 f0 ff 4b 54 8b 43 54 85 c0 79 08 <0f> 0b fc 00 ec f3 bd e0 5b c3 80 3d dc 61 ab e0 00 57 56 53 79 Nov 13 09:47:16 hydrogen kernel: <0>Fatal exception: panic in 5 seconds Thanks, Eric This message and any attachment are confidential and may be privileged or otherwise protected from disclosure. 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