[Linux-cluster] RHEL 5.5 Crash in gfs2

[Scooter Morris]

Hi all,
     We recently upgraded to 5.5 (kernel 2.6.18-194.el5) to get some of 
the gfs2 fixes on a 3 node cluster, but crashed two days later with the 
following stack trace:

[2010-04-04 10:28:48]Unable to handle kernel NULL pointer dereference at 
0000000000000078 RIP: ^M
[2010-04-04 10:28:48] [<ffffffff887dc3d3>] :gfs2:revoke_lo_add+0x1a/0x32^M
[2010-04-04 10:28:48]PGD 7d4297067 PUD 13a24c067 PMD 0 ^M
[2010-04-04 10:28:48]Oops: 0002 [1] SMP ^M
[2010-04-04 10:28:48]last sysfs file: 
/devices/pci0000:00/0000:00:01.0/0000:03:00.0/0000:04:01.0/0000:07:00.0/0000:08:00.0/irq^M
[2010-04-04 10:28:48]CPU 8 ^M
[2010-04-04 10:28:48]Modules linked in: ipt_MASQUERADE iptable_nat 
ip_nat bridge autofs4 hidp l2cap bluetooth lock_dlm gfs2 dlm configfs 
lockd sunrpc ip_conntrack_netbios_ns xt_state ip_conntrack nfnetlink 
xt_tcpudp ipt_REJECT iptable_filter ip_tables arpt_mangle 
arptable_filter arp_tables x_tables ib_iser libiscsi2 
scsi_transport_iscsi2 scsi_transport_iscsi ib_srp rds ib_sdp ib_ipoib 
ipoib_helper ipv6 xfrm_nalgo crypto_api rdma_ucm rdma_cm ib_ucm 
ib_uverbs ib_umad ib_cm iw_cm ib_addr ib_sa ib_mad ib_core 
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 sg ide_cd bnx2 cdrom hpilo 
serio_raw pcspkr dm_raid45 dm_message dm_region_hash dm_mem_cache 
dm_snapshot dm_zero dm_mirror dm_log dm_mod qla2xxx scsi_transport_fc 
ata_piix libata shpchp cciss sd_mod scsi_mod ext3 jbd uhci_hcd ohci_hcd 
ehci_hcd^M
[2010-04-04 10:28:49]Pid: 795, comm: kswapd0 Not tainted 2.6.18-194.el5 #1^M
[2010-04-04 10:28:49]RIP: 0010:[<ffffffff887dc3d3>]  
[<ffffffff887dc3d3>] :gfs2:revoke_lo_add+0x1a/0x32^M
[2010-04-04 10:28:49]RSP: 0018:ffff81082efcdae8  EFLAGS: 00010282^M
[2010-04-04 10:28:49]RAX: 0000000000000000 RBX: ffff810256e037f0 RCX: 
ffff8100207fd180^M
[2010-04-04 10:28:49]RDX: ffff81051abdf630 RSI: ffff810819032720 RDI: 
ffff810819032000^M
[2010-04-04 10:28:49]RBP: ffff81051abdf610 R08: ffff81011cb31b06 R09: 
ffff81082efcdb20^M
[2010-04-04 10:28:49]R10: ffff8101135d8330 R11: ffffffff887dc3b9 R12: 
ffff810819032000^M
[2010-04-04 10:28:49]R13: 0000000000000000 R14: ffff810256e037f0 R15: 
ffff810819032000^M
[2010-04-04 10:28:50]FS:  0000000000000000(0000) 
GS:ffff81011cb319c0(0000) knlGS:0000000000000000^M
[2010-04-04 10:28:50]CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b^M
[2010-04-04 10:28:50]CR2: 0000000000000078 CR3: 000000024ed62000 CR4: 
00000000000006e0^M
[2010-04-04 10:28:50]Process kswapd0 (pid: 795, threadinfo 
ffff81082efcc000, task ffff81082f5d17a0)^M
[2010-04-04 10:28:50]Stack:  ffffffff887dd88c 000000002efcde10 
ffff810256e037f0 ffff81011c7fadd8^M
[2010-04-04 10:28:50] 0000000000000000 0000000000000000 ffffffff887deaf6 
000000000000000e^M
[2010-04-04 10:28:50] ffff81011c7fadd8 00000000000000b0 ffff81082efcdcf0 
ffff810819032000^M
[2010-04-04 10:28:50]Call Trace:^M
[2010-04-04 10:28:50] [<ffffffff887dd88c>] 
:gfs2:gfs2_remove_from_journal+0x11f/0x131^M
[2010-04-04 10:28:50] [<ffffffff887deaf6>] 
:gfs2:gfs2_invalidatepage+0xea/0x151^M
[2010-04-04 10:28:50] [<ffffffff887de739>] 
:gfs2:gfs2_writepage_common+0x95/0xb1^M
[2010-04-04 10:28:50] [<ffffffff887ded63>] 
:gfs2:gfs2_jdata_writepage+0x56/0x98^M
[2010-04-04 10:28:50] [<ffffffff800cbf1b>] 
shrink_inactive_list+0x3fd/0x8d8^M
[2010-04-04 10:28:50] [<ffffffff800484ad>] __pagevec_release+0x19/0x22^M
[2010-04-04 10:28:51] [<ffffffff800cb9fd>] shrink_active_list+0x4b4/0x4c4^M
[2010-04-04 10:28:51] [<ffffffff8001314a>] shrink_zone+0x127/0x18d^M
[2010-04-04 10:28:51] [<ffffffff800581a7>] kswapd+0x323/0x46c^M
[2010-04-04 10:28:51] [<ffffffff800a1ba4>] 
autoremove_wake_function+0x0/0x2e^M
[2010-04-04 10:28:51] [<ffffffff800a198c>] keventd_create_kthread+0x0/0xc4^M
[2010-04-04 10:28:51] [<ffffffff80057e84>] kswapd+0x0/0x46c^M
[2010-04-04 10:28:51] [<ffffffff800a198c>] keventd_create_kthread+0x0/0xc4^M
[2010-04-04 10:28:51] [<ffffffff80032bdc>] kthread+0xfe/0x132^M
[2010-04-04 10:28:51] [<ffffffff8009e81a>] request_module+0x0/0x14d^M
[2010-04-04 10:28:51] [<ffffffff8005efb1>] child_rip+0xa/0x11^M
[2010-04-04 10:28:51] [<ffffffff800a198c>] keventd_create_kthread+0x0/0xc4^M
[2010-04-04 10:28:51] [<ffffffff80032ade>] kthread+0x0/0x132^M
[2010-04-04 10:28:51] [<ffffffff8005efa7>] child_rip+0x0/0x11^M

This looks exactly like bug 437803, but that was closed early last 
year.  Does anyone have any ideas what might be going on?  I 
double-checked, and we definitely do not have the old kmod-gfs2 installed.

-- scooter