A kernel panic was triggered on RHEL 6: BUG at mm/slab.c:524!

Issue

• A kernel panic was triggered on RHEL 6:

kernel BUG at mm/slab.c:524!
invalid opcode: 0000 [#1] SMP 
last sysfs file: /sys/devices/pci0000:7f/0000:7f:13.6/irq
CPU 4 
Modules linked in: bridge gfs2 dlm configfs autofs4 des_generic ecb md4 nls_utf8 cifs nfs lockd fscache auth_rpcgss nfs_acl sunrpc bonding 8021q garp stp llc ipt_REJECT nf_conntrack_ipv4 nf_defrag_ipv4 iptable_filter ip_tables ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables ipv6 emcpvlumd(P)(U) emcpxcrypt(P)(U) emcpdm(P)(U) emcpmpx(P)(U) emcpgpx(P)(U) emcp(P)(U) power_meter dcdbas microcode sb_edac edac_core iTCO_wdt iTCO_vendor_support shpchp sg tg3 ext4 mbcache jbd2 sr_mod cdrom sd_mod crc_t10dif ahci wmi megaraid_sas qla2xxx scsi_transport_fc scsi_tgt dm_mirror dm_region_hash dm_log dm_mod [last unloaded: configfs]

Pid: 354, comm: kswapd0 Tainted: P           ---------------    2.6.32-358.14.1.el6.x86_64 #1 Dell Inc. PowerEdge R720/0C4Y3R
RIP: 0010:[<ffffffff811668a5>]  [<ffffffff811668a5>] ksize+0x55/0x80
RSP: 0018:ffff880028243c80  EFLAGS: 00010246
RAX: ffffea000b93f320 RBX: ffff880151ff1b80 RCX: 0000000000000246
RDX: 0040000000080000 RSI: ffff88083fcf03c0 RDI: ffff88034ed7c000
RBP: ffff880028243c80 R08: 0000000000010000 R09: 000000000000026b
R10: 00000000000007f2 R11: 0000000000000000 R12: ffff88034ed7c000
R13: 0000000000000000 R14: 0000000000000672 R15: 00000000ffffffff
FS:  0000000000000000(0000) GS:ffff880028240000(0000) knlGS:0000000000000000
CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 0000003b646ee230 CR3: 000000095ab2a000 CR4: 00000000000407e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process kswapd0 (pid: 354, threadinfo ffff880831444000, task ffff880831440ae0)
Stack:
 ffff880028243cd0 ffffffff8143db71 ffff880028243cc0 ffff881034720700
<d> ffff88015c79d180 ffff88082c09c020 ffff88082c09c6e0 ffff8805d0e9c680
<d> 0000000000000640 ffff88101ea7f280 ffff880028243cf0 ffffffff8143dce4
Call Trace:
 <IRQ> 
 [<ffffffff8143db71>] __alloc_skb+0x81/0x190
 [<ffffffff8143dce4>] __netdev_alloc_skb+0x24/0x50
 [<ffffffffa019ade5>] tg3_alloc_rx_skb+0xa5/0x250 [tg3]
 [<ffffffffa019fd12>] tg3_poll_work+0x882/0xe50 [tg3]
 [<ffffffffa01a032c>] tg3_poll_msix+0x4c/0x150 [tg3]
 [<ffffffff8144d203>] net_rx_action+0x103/0x2f0
 [<ffffffff81076fd1>] __do_softirq+0xc1/0x1e0
 [<ffffffff810e1690>] ? handle_IRQ_event+0x60/0x170
 [<ffffffff8107702f>] ? __do_softirq+0x11f/0x1e0
 [<ffffffff8100c1cc>] call_softirq+0x1c/0x30
 [<ffffffff8100de05>] do_softirq+0x65/0xa0
 [<ffffffff81076db5>] irq_exit+0x85/0x90
 [<ffffffff81517335>] do_IRQ+0x75/0xf0
 [<ffffffff8100b9d3>] ret_from_intr+0x0/0x11
 <EOI> 
 [<ffffffffa0504550>] ? find_lkb+0x90/0xe0 [dlm]
 [<ffffffffa050984b>] dlm_unlock+0x5b/0x130 [dlm]
 [<ffffffff81012c49>] ? read_tsc+0x9/0x20
 [<ffffffff810a1427>] ? getnstimeofday+0x57/0xe0
 [<ffffffffa06b9a91>] gdlm_put_lock+0x131/0x530 [gfs2]
 [<ffffffffa069a52d>] gfs2_glock_put+0x10d/0x180 [gfs2]
 [<ffffffffa06b4fab>] gfs2_clear_inode+0x5b/0x90 [gfs2]
 [<ffffffff8119d04c>] clear_inode+0xac/0x140
 [<ffffffff8119d120>] dispose_list+0x40/0x120
 [<ffffffff8119d474>] shrink_icache_memory+0x274/0x2e0
 [<ffffffff81131e9a>] shrink_slab+0x12a/0x1a0
 [<ffffffff8113508a>] balance_pgdat+0x59a/0x820
 [<ffffffff81135444>] kswapd+0x134/0x3c0
 [<ffffffff81096cc0>] ? autoremove_wake_function+0x0/0x40
 [<ffffffff81135310>] ? kswapd+0x0/0x3c0
 [<ffffffff81096956>] kthread+0x96/0xa0
 [<ffffffff8100c0ca>] child_rip+0xa/0x20
 [<ffffffff810968c0>] ? kthread+0x0/0xa0
 [<ffffffff8100c0c0>] ? child_rip+0x0/0x20
Code: 29 d0 48 ba 00 00 00 00 00 ea ff ff 48 01 d0 48 8b 10 66 85 d2 78 18 84 d2 79 10 48 8b 40 28 8b 80 0c 80 00 00 c9 c3 0f 0b eb fe <0f> 0b eb fe 48 8b 40 10 48 8b 10 66 85 d2 79 dc 48 8b 40 10 48 
RIP  [<ffffffff811668a5>] ksize+0x55/0x80
 RSP <ffff880028243c80>