do_acct_process() におけるカーネルパニック

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。

nable to handle kernel NULL pointer dereference at 0000000000000008 RIP: 
 [<ffffffff8005b2b9>] do_acct_process+0x36f/0x54e
PGD 0 
Oops:0000 [1] SMP 
last sysfs file:/class/scsi_host/host1/fwrev
CPU 3 
Modules linked in: mptctl hp_ilo(U) ipmi_si(U) ipmi_devintf(U) ipmi_msghandler(U) nfsd exportfs auth_rpcgss vtune_drv(U) autofs4 nfs lockd fscache nfs_acl sunrpc vxspec(PFU) vxio(PFU) vxdmp(PU) vxportal(PFU) fdd(PFU) vxfs(PU) dm_mirror dm_log dm_multipath scsi_dh dm_mod video backlight sbs i2c_ec button battery asus_acpi acpi_memhotplug ac parport_pc lp parport sg ide_cd cdrom k8_edac i2c_piix4 shpchp edac_mc lpfc k8temp i2c_core hwmon serio_raw scsi_transport_fc e1000e(U) bnx2 pcspkr usb_storage ata_piix sata_nv libata mptsas scsi_transport_sas mptspi mptscsih scsi_transport_spi mptbase cciss sd_mod scsi_mod ext3 jbd uhci_hcd ohci_hcd ehci_hcd
Pid:19690, comm: ssllisten Tainted:PF  M  2.6.18-128.1.1.el5 #1
RIP:0010:[<ffffffff8005b2b9>]  [<ffffffff8005b2b9>] do_acct_process+0x36f/0x54e
RSP:0018:ffff81025a1b7c48  EFLAGS:00010286
RAX: ffff8102e059ccc0 RBX:00000000000000cc RCX:0000000000000000
RDX:0000000000000000 RSI:0000000000989680 RDI: ffffffff803c3e80
RBP: ffff81042d58a9c0 R08: ffff81025a1b7cfc R09:0000000000000010
R10:00000000ffffe000 R11:0000000000000009 R12:0000000000000001
R13: ffff81025a1b7cd8 R14: ffff8102e059ccc0 R15: ffff81025a1b7f58
FS:0000000040e92940(0000) GS:ffff8102370b96c0(0000) knlGS:00000000f7f436c0
CS:0010 DS:002b ES:002b CR0:000000008005003b
CR2:0000000000000008 CR3:0000000000201000 CR4:00000000000006e0
Process ssllisten (pid:19690, threadinfo ffff81025a1b6000, task ffff8103100a97e0)
Stack:ffff810236567058 ffff810230a38c18 ffff8102330f06a0 0000000000000000
 0000000000000000 0000001000000000 ffff81021cbba920 ffff81022e773078
 ffff81042ca03680 ffffffff8000d0d4 0000000000000010 0000000000000010
Call Trace:
 [<ffffffff8000d0d4>] dput+0x2c/0x114
 [<ffffffff800494f5>] acct_process+0x45/0x50
 [<ffffffff80015302>] do_exit+0x2bb/0x91f
 [<ffffffff80048c18>] cpuset_exit+0x0/0x6c
 [<ffffffff8002ad05>] get_signal_to_deliver+0x42c/0x45a
 [<ffffffff8005a837>] do_notify_resume+0x9c/0x7af
 [<ffffffff8008a461>] default_wake_function+0x0/0xe
 [<ffffffff800f3ad3>] compat_core_sys_select+0x1bf/0x1d0
 [<ffffffff800b4a1c>] audit_syscall_exit+0x31b/0x336
 [<ffffffff8005d32e>] int_signal+0x12/0x17


Code:48 8b 51 08 8b 82 b4 00 00 00 c1 e0 14 0b 82 b8 00 00 00 03 
RIP  [<ffffffff8005b2b9>] do_acct_process+0x36f/0x54e
 RSP <ffff81025a1b7c48>