符号なしモジュールの unm_nic_poll_controller() 関数でカーネルがパニックになる

Issue

• カーネルがパニックになり、以下のコールトレースが出力されます。

nx_nic[eth0]:Device is DOWN.Fail count[8]           
nx_nic[eth0]:Firmware hang detected.Severity code=0 Peg number=0 Error code=0 Return address=0
nx_nic:Flash Version:Firmware[4.0.579], BIOS[2.1.0]  
nx_nic:No memory on card.Load Cut through.          
Unable to handle kernel NULL pointer dereference<1>Unable to handle kernel NULL pointer dereference at 0000000000000018 RIP: 
 [<ffffffff8822bd77>] :nx_nic:unm_nic_poll_controller+0x29/0x42
PGD 0 
Oops:0000 [1] SMP 
last sysfs file:/class/firmware/0000:04:00.0/loading
CPU 5 
Modules linked in: mptctl mptbase netconsole nls_utf8 cifs nfs fscache nfs_acl lockd sunrpc bnx2i(U) libiscsi2 cnic(U) uio scsi_transport_iscsi2 scsi_transport_iscsi loop dm_round_robin dm_multipath scsi_dh video backlight sbs power_meter hwmon i2c_ec i2c_core dell_wmi wmi button battery asus_acpi acpi_memhotplug ac parport_pc lp parport joydev sr_mod cdrom sg lpfc nx_nic(U) hpilo serio_raw scsi_transport_fc shpchp pcspkr dm_raid45 dm_message dm_region_hash dm_mem_cache dm_snapshot dm_zero dm_mirror dm_log dm_mod usb_storage ata_piix libata cciss sd_mod scsi_mod ext3 jbd uhci_hcd ohci_hcd ehci_hcd
Pid:2821, comm: firmware_helper Tainted:G      2.6.18-194.17.4.el5 #1
RIP:0010:[<ffffffff8822bd77>]  [<ffffffff8822bd77>] :nx_nic:unm_nic_poll_controller+0x29/0x42
RSP:0018:ffff810838fdf8f8  EFLAGS:00010046
RAX:0000000000000000 RBX: ffff81083fe50000 RCX:0000000000000001
RDX:0000000000000000 RSI:0000000000000016 RDI:000000000000003b
RBP: ffffffff88583ae0 R08:00000000a479de10 R09:0000022000000000
R10:0000000000000046 R11:0000000000000006 R12: ffff81083fe50500
R13: ffff81069c065580 R14:0000000000000033 R15: ffff81015fcfc7a0
FS:00002b73e10156e0(0000) GS:ffff81105c20b1c0(0000) knlGS:0000000000000000
CS:0010 DS:0000 ES:0000 CR0:000000008005003b
CR2:0000000000000018 CR3:00000017b9dea000 CR4:00000000000006e0
Process firmware_helper (pid:2821, threadinfo ffff810838fde000, task ffff81015fcfc7a0)
Stack:0000000000000000 ffff81083fe50000 ffffffff88583ae0 ffffffff80239fe9
 000000000000002c ffffffff8023a458 0000000000000000 0000000000000030
 0000000000000000 ffff81083fe50000 ffffffff88583ae0 ffff81105c3f1280
Call Trace:
 [<ffffffff80239fe9>] netpoll_poll+0x3a/0x365
 [<ffffffff8023a458>] find_skb+0x41/0xec
 [<ffffffff8023a3fd>] netpoll_send_skb+0xe9/0x103
 [<ffffffff885830d0>] :netconsole:write_msg+0x40/0x58
 [<ffffffff80091c0f>] __call_console_drivers+0x5b/0x69
 [<ffffffff800172a9>] release_console_sem+0x189/0x20e
 [<ffffffff800923a8>] vprintk+0x2b2/0x317
 [<ffffffff8009245f>] printk+0x52/0xbd
 [<ffffffff800a687e>] search_module_extables+0x81/0x8d
 [<ffffffff8006505a>] oops_begin+0x5e/0x65
 [<ffffffff80066d87>] do_page_fault+0x6fd/0x874
 [<ffffffff80076521>] do_flush_tlb_all+0x0/0x6a
 [<ffffffff8005dde9>] error_exit+0x0/0x84
 [<ffffffff80076521>] do_flush_tlb_all+0x0/0x6a


Code:48 8b 70 18 41 ff 94 24 e0 3a 00 00 8b 7b 38 41 58 5b 41 5c 
RIP  [<ffffffff8822bd77>] :nx_nic:unm_nic_poll_controller+0x29/0x42
 RSP <ffff810838fdf8f8>