Hi,
I got a kernel panic with CentOS 5.3 (kernel is 2.6.18-128.1.6.el5) in sg_cmd_done. I wasn't able to reproduce this behavior. Here's the output of /var/log/messages. Is this a known bug?
Sep 16 14:36:48 172.16.9.60 general protection fault: 0000 [1] Sep 16 14:36:48 172.16.9.60 SMP Sep 16 14:36:48 172.16.9.60 Sep 16 14:36:48 172.16.9.60 last sysfs file: /block/dm-13/dev Sep 16 14:36:48 172.16.9.60 CPU 1 Sep 16 14:36:48 172.16.9.60 Sep 16 14:36:48 172.16.9.60 Modules linked in: Sep 16 14:36:48 172.16.9.60 iscsi_scst(U) Sep 16 14:36:49 172.16.9.60 iscsi_tcp(U) Sep 16 14:36:49 172.16.9.60 libiscsi_tcp(U) Sep 16 14:36:49 172.16.9.60 libiscsi(U) Sep 16 14:36:49 172.16.9.60 scsi_transport_iscsi(U) Sep 16 14:36:49 172.16.9.60 isp_mod(U) Sep 16 14:36:49 172.16.9.60 isp_scst(U) Sep 16 14:36:49 172.16.9.60 scst_user(U) Sep 16 14:36:49 172.16.9.60 scst(U) Sep 16 14:36:49 172.16.9.60 dm_round_robin Sep 16 14:36:49 172.16.9.60 nls_utf8 Sep 16 14:36:49 172.16.9.60 loop Sep 16 14:36:49 172.16.9.60 dm_multipath Sep 16 14:36:49 172.16.9.60 scsi_dh Sep 16 14:36:49 172.16.9.60 ipt_MASQUERADE Sep 16 14:36:50 172.16.9.60 iptable_nat Sep 16 14:36:50 172.16.9.60 ip_nat Sep 16 14:36:50 172.16.9.60 xt_state Sep 16 14:36:50 172.16.9.60 ip_conntrack Sep 16 14:36:53 172.16.9.60 nfnetlink Sep 16 14:36:53 172.16.9.60 ipt_REJECT Sep 16 14:36:53 172.16.9.60 xt_tcpudp Sep 16 14:36:53 172.16.9.60 iptable_filter Sep 16 14:36:53 172.16.9.60 ip_tables Sep 16 14:36:53 172.16.9.60 x_tables Sep 16 14:36:53 172.16.9.60 bridge Sep 16 14:36:53 172.16.9.60 netconsole Sep 16 14:36:53 172.16.9.60 autofs4 Sep 16 14:36:53 172.16.9.60 nfs Sep 16 14:36:53 172.16.9.60 lockd Sep 16 14:36:53 172.16.9.60 fscache Sep 16 14:36:53 172.16.9.60 nfs_acl Sep 16 14:36:53 172.16.9.60 sunrpc Sep 16 14:36:53 172.16.9.60 video Sep 16 14:36:53 172.16.9.60 sbs Sep 16 14:36:53 172.16.9.60 backlight Sep 16 14:36:53 172.16.9.60 i2c_ec Sep 16 14:36:53 172.16.9.60 i2c_core Sep 16 14:36:53 172.16.9.60 button Sep 16 14:36:53 172.16.9.60 battery Sep 16 14:36:53 172.16.9.60 asus_acpi Sep 16 14:36:53 172.16.9.60 acpi_memhotplug Sep 16 14:36:53 172.16.9.60 ac Sep 16 14:36:53 172.16.9.60 ipv6 Sep 16 14:36:53 172.16.9.60 xfrm_nalgo Sep 16 14:36:53 172.16.9.60 crypto_api Sep 16 14:36:53 172.16.9.60 parport_pc Sep 16 14:36:53 172.16.9.60 lp Sep 16 14:36:53 172.16.9.60 parport Sep 16 14:36:53 172.16.9.60 joydev Sep 16 14:36:53 172.16.9.60 bnx2(U) Sep 16 14:36:53 172.16.9.60 bnx2x(U) Sep 16 14:36:53 172.16.9.60 sg Sep 16 14:36:53 172.16.9.60 pcspkr Sep 16 14:36:53 172.16.9.60 dm_raid45 Sep 16 14:36:53 172.16.9.60 dm_message Sep 16 14:36:53 172.16.9.60 dm_region_hash Sep 16 14:36:53 172.16.9.60 dm_mem_cache Sep 16 14:36:53 172.16.9.60 dm_snapshot Sep 16 14:36:53 172.16.9.60 dm_zero Sep 16 14:36:53 172.16.9.60 dm_mirror Sep 16 14:36:53 172.16.9.60 dm_log Sep 16 14:36:53 172.16.9.60 dm_mod Sep 16 14:36:54 172.16.9.60 shpchp Sep 16 14:36:54 172.16.9.60 mptsas Sep 16 14:36:54 172.16.9.60 mptscsih Sep 16 14:36:54 172.16.9.60 mptbase Sep 16 14:36:54 172.16.9.60 scsi_transport_sas Sep 16 14:36:54 172.16.9.60 sd_mod Sep 16 14:36:54 172.16.9.60 scsi_mod Sep 16 14:36:54 172.16.9.60 ext3 Sep 16 14:36:54 172.16.9.60 jbd Sep 16 14:36:54 172.16.9.60 uhci_hcd Sep 16 14:36:54 172.16.9.60 ohci_hcd Sep 16 14:36:54 172.16.9.60 ehci_hcd Sep 16 14:36:54 172.16.9.60 Sep 16 14:36:54 172.16.9.60 Pid: 0, comm: swapper Tainted: G 2.6.18-128.1.6.el5.KM4 #1 Sep 16 14:36:54 172.16.9.60 RIP: 0010:[<ffffffff881b11f0>] Sep 16 14:36:54 172.16.9.60 [<ffffffff881b11f0>] :sg:sg_cmd_done+0x2e/0x24e Sep 16 14:36:54 172.16.9.60 RSP: 0018:ffff8106800a3e20 EFLAGS: 00010006 Sep 16 14:36:54 172.16.9.60 RAX: ffffffff881b11c2 RBX: 0000000000000000 RCX: 0000000000000000 Sep 16 14:36:54 172.16.9.60 RDX: 0000000000000000 RSI: ffff81065ca726e8 RDI: ffffffff881b483b Sep 16 14:36:54 172.16.9.60 RBP: ffff81064fc24070 R08: 00000000000003bf R09: 000000007e8ac500 Sep 16 14:36:54 172.16.9.60 R10: ffffc20010083240 R11: ffffffff8807aa47 R12: ffff810c20957340 Sep 16 14:36:54 172.16.9.60 R13: 2030207772207366 R14: ffff81065ca726e8 R15: 0000000000000000 Sep 16 14:36:54 172.16.9.60 FS: 0000000000000000(0000) GS:ffff81011a125a40(0000) knlGS:0000000000000000 Sep 16 14:36:54 172.16.9.60 CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b Sep 16 14:36:54 172.16.9.60 CR2: 00002b3e2f65f5a8 CR3: 0000000000201000 CR4: 00000000000006e0 Sep 16 14:36:54 172.16.9.60 Process swapper (pid: 0, threadinfo ffff81068009e000, task ffff81011a133080) Sep 16 14:36:54 172.16.9.60 Stack: Sep 16 14:36:54 172.16.9.60 ffff81065ddfe440 Sep 16 14:36:54 172.16.9.60 ffffffff8002c863 Sep 16 14:36:54 172.16.9.60 ffff810c7e8ac500 Sep 16 14:36:54 172.16.9.60 ffff81065ca726d8 Sep 16 14:36:54 172.16.9.60 Sep 16 14:36:54 172.16.9.60 ffff8106595cd708 Sep 16 14:36:54 172.16.9.60 ffff810c20957340 Sep 16 14:36:54 172.16.9.60 0000000000000001 Sep 16 14:36:54 172.16.9.60 0000000000000246 Sep 16 14:36:54 172.16.9.60 Sep 16 14:36:54 172.16.9.60 0000000000000000 Sep 16 14:36:54 172.16.9.60 ffffffff8807aa72 Sep 16 14:36:54 172.16.9.60 0000000000000001 Sep 16 14:36:54 172.16.9.60 ffff8106595cd708 Sep 16 14:36:54 172.16.9.60 Sep 16 14:36:54 172.16.9.60 Call Trace: Sep 16 14:36:54 172.16.9.60 <IRQ> Sep 16 14:36:54 172.16.9.60 [<ffffffff8002c863>] __end_that_request_first+0x265/0x5d1 Sep 16 14:36:54 172.16.9.60 [<ffffffff8807aa72>] :scsi_mod:scsi_end_async+0x2b/0x4c Sep 16 14:36:54 172.16.9.60 [<ffffffff8807a024>] :scsi_mod:scsi_end_request+0xa7/0xcd Sep 16 14:36:54 172.16.9.60 [<ffffffff8807a198>] :scsi_mod:scsi_io_completion+0x14e/0x324 Sep 16 14:36:54 172.16.9.60 [<ffffffff8807a42d>] :scsi_mod:scsi_device_unbusy+0x67/0x81 Sep 16 14:36:54 172.16.9.60 [<ffffffff8003747d>] blk_done_softirq+0x5f/0x6d Sep 16 14:36:54 172.16.9.60 [<ffffffff80011e94>] __do_softirq+0x89/0x133 Sep 16 14:36:54 172.16.9.60 [<ffffffff8005e2fc>] call_softirq+0x1c/0x28 Sep 16 14:36:54 172.16.9.60 [<ffffffff8006cad9>] do_softirq+0x2c/0x85 Sep 16 14:36:54 172.16.9.60 [<ffffffff8006c961>] do_IRQ+0xec/0xf5 Sep 16 14:36:54 172.16.9.60 [<ffffffff8018f862>] acpi_processor_idle+0x0/0x43a Sep 16 14:36:54 172.16.9.60 [<ffffffff8005d615>] ret_from_intr+0x0/0xa Sep 16 14:36:54 172.16.9.60 <EOI> Sep 16 14:36:54 172.16.9.60 [<ffffffff8018f7f3>] acpi_safe_halt+0x25/0x36 Sep 16 14:36:55 172.16.9.60 [<ffffffff8018f9e9>] acpi_processor_idle+0x187/0x43a Sep 16 14:36:55 172.16.9.60 [<ffffffff8018f862>] acpi_processor_idle+0x0/0x43a Sep 16 14:36:55 172.16.9.60 [<ffffffff8018f862>] acpi_processor_idle+0x0/0x43a Sep 16 14:36:55 172.16.9.60 [<ffffffff80048a6d>] cpu_idle+0x95/0xb8 Sep 16 14:36:55 172.16.9.60 [<ffffffff80076c1f>] start_secondary+0x45a/0x469 Sep 16 14:36:55 172.16.9.60 Sep 16 14:36:55 172.16.9.60 Sep 16 14:36:55 172.16.9.60 Code: Sep 16 14:36:55 172.16.9.60 4d Sep 16 14:36:55 172.16.9.60 8b Sep 16 14:36:55 172.16.9.60 65 Sep 16 14:36:55 172.16.9.60 08 Sep 16 14:36:55 172.16.9.60 4d Sep 16 14:36:55 172.16.9.60 85 Sep 16 14:36:55 172.16.9.60 e4 Sep 16 14:36:55 172.16.9.60 74 Sep 16 14:36:55 172.16.9.60 09 Sep 16 14:36:55 172.16.9.60 41 Sep 16 14:36:55 172.16.9.60 8a Sep 16 14:36:55 172.16.9.60 44 Sep 16 14:36:55 172.16.9.60 24 Sep 16 14:36:55 172.16.9.60 30 Sep 16 14:36:55 172.16.9.60 84 Sep 16 14:36:55 172.16.9.60 c0 Sep 16 14:36:55 172.16.9.60 74 Sep 16 14:36:55 172.16.9.60 13 Sep 16 14:36:55 172.16.9.60 48 Sep 16 14:36:55 172.16.9.60 c7 Sep 16 14:36:55 172.16.9.60 Sep 16 14:36:55 172.16.9.60 RIP Sep 16 14:36:55 172.16.9.60 [<ffffffff881b11f0>] :sg:sg_cmd_done+0x2e/0x24e Sep 16 14:36:55 172.16.9.60 RSP <ffff8106800a3e20> Sep 16 14:36:55 172.16.9.60 Sep 16 14:36:55 172.16.9.60 Kernel panic - not syncing: Fatal exception Sep 16 14:36:55 172.16.9.60