[RHEL6] kernel BUG at net/core/dev.c:6381!

Issue

• Kernel panic while using the Intel igb driver.
• Trace / vmcore reports the following in the log:

real device is not allowed to be moved
default_device_exit: failed to move eth0 to init_net: -22
------------[ cut here ]------------
kernel BUG at net/core/dev.c:6381!
invalid opcode: 0000 [#1] SMP 
last sysfs file: /sys/devices/virtual/block/dm-0/dm/name
CPU 7 
Modules linked in: deflate zlib_deflate ctr camellia cast5 rmd160 crypto_null ccm serpent blowfish twofish_x86_64 twofish_common ecb xcbc cbc sha256_generic sha512_generic des_generic aesni_intel cryptd aes_x86_64 aes_generic tunnel4 xfrm_ipcomp tunnel6 sunrpc cavm_ipsec(U) pkp_drv(U) acpi_cpufreq freq_table mperf bonding 8021q garp stp llc xt_limit xt_u32 ipt_ah xt_esp xt_length vfat fat ipv6 igb dca serio_raw i2c_i801 i2c_core sg iTCO_wdt iTCO_vendor_support e1000e i7core_edac edac_core shpchp ext3 jbd mbcache raid1 sd_mod crc_t10dif ahci dm_mirror dm_region_hash dm_log dm_mod [last unloaded: nf_conntrack]

Pid: 125, comm: netns Not tainted 2.6.32-279.el6.x86_64 #1 Intel Thurley/Greencity
RIP: 0010:[<ffffffff8143da0d>]  [<ffffffff8143da0d>] default_device_exit+0xed/0x100
RSP: 0018:ffff8801bb481dd0  EFLAGS: 00010282
RAX: 0000000000000040 RBX: ffff8801b8100020 RCX: 0000000000005486
RDX: 0000000000000000 RSI: 0000000000000046 RDI: 0000000000000246
RBP: ffff8801bb481e10 R08: 0000000000000000 R09: ffffffff8163ab80
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8200cf30
R13: ffffffff8200cec0 R14: ffff8801bb481dd0 R15: ffff880040219548
FS:  0000000000000000(0000) GS:ffff8801c5820000(0000) knlGS:0000000000000000
CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 0000000002030550 CR3: 00000001b8b85000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process netns (pid: 125, threadinfo ffff8801bb480000, task ffff8801bb438080)
Stack:
 ffff880032766564 ffffffff814370a0 ffff8801bb481fd8 00000000ebe47654
<d> ffffffff81b121c0 ffffffff8200cec0 ffffffff814370a0 ffff8801bb481fd8
<d> ffff8801bb481e30 ffffffff8143710e ffff880040219540 ffff880040219540
Call Trace:
 [<ffffffff814370a0>] ? cleanup_net+0x0/0xa0
 [<ffffffff814370a0>] ? cleanup_net+0x0/0xa0
 [<ffffffff8143710e>] cleanup_net+0x6e/0xa0
 [<ffffffff8108c760>] worker_thread+0x170/0x2a0
 [<ffffffff810920d0>] ? autoremove_wake_function+0x0/0x40
 [<ffffffff8108c5f0>] ? worker_thread+0x0/0x2a0
 [<ffffffff81091d66>] kthread+0x96/0xa0
 [<ffffffff8100c14a>] child_rip+0xa/0x20
 [<ffffffff81091cd0>] ? kthread+0x0/0xa0
 [<ffffffff8100c140>] ? child_rip+0x0/0x20
Code: 82 48 89 df e8 65 fc ff ff 85 c0 0f 84 65 ff ff ff 89 c1 48 89 da 48 c7 c6 50 0f 66 81 48 c7 c7 e8 67 80 81 31 c0 e8 d5 f7 0b 00 <0f> 0b eb fe e8 2a de c2 ff 66 2e 0f 1f 84 00 00 00 00 00 55 48 
RIP  [<ffffffff8143da0d>] default_device_exit+0xed/0x100
 RSP <ffff8801bb481dd0>