Comment 4 for bug 1527748

Here's the fragment of Oops I have demonstrating the crash. If I'm understanding the versioning here, it looks like the issue may now have been fully addressed by that patch alone? :(

[ 0.104000] CR2: ffff8807bffff000 CR3: 0000000001c13000 CR4: 00000000001406f0
[ 0.104000] Stack:
[ 0.104000] 0000000000000000 ffff880796773ea0 ffffffff8176bc39 ffff8807965d3140
[ 0.104000] ffff8807a1001b00 ffffffff81098810 0000000000000000 0000000000000000
[ 0.104000] ffff880796773f48 ffffffff810915f2 0000000000000001 0000000000000001
[ 0.104000] Call Trace:
[ 0.104000] [<ffffffff8176bc39>] ? schedule+0x29/0x70
[ 0.104000] [<ffffffff81098810>] ? SyS_setgroups+0x180/0x180
[ 0.104000] [<ffffffff810915f2>] kthread+0xd2/0xf0
[ 0.104000] [<ffffffff81091520>] ? kthread_create_on_node+0x1c0/0x1c0
[ 0.104000] [<ffffffff8176fbd8>] ret_from_fork+0x58/0x90
[ 0.104000] [<ffffffff81091520>] ? kthread_create_on_node+0x1c0/0x1c0
[ 0.104000] Code: 89 fa 48 0f a3 11 19 d2 31 f6 85 d2 40 0f 95 c6 ff d0 4c 89 e7 e8 62 de 11 00 48 83 c4 18 31 c0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 <0f> 0b 0f 0b 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00
[ 0.104000] RIP [<ffffffff810989af>] smpboot_thread_fn+0x19f/0x1b0
[ 0.104000] RSP <ffff880796773e88>
[ 0.104028] ---[ end trace b59b90c026f24b92 ]---
[ 0.104734] ------------[ cut here ]------------
[ 0.105486] kernel BUG at /build/linux-lts-utopic-p81gRk/linux-lts-utopic-3.16.0/kernel/smpboot.c:134!
[ 0.106799] invalid opcode: 0000 [#2] SMP
[ 0.107528] Modules linked in:
[ 0.108000] CPU: 0 PID: 29 Comm: ksoftirqd/1 Tainted: G D 3.16.0-55-generic #74~14.04.1-Ubuntu
[ 0.108000] Hardware name: Google Google, BIOS Google 01/01/2011
[ 0.108000] task: ffff8807966f7010 ti: ffff880796778000 task.ti: ffff880796778000
[ 0.108000] RIP: 0010:[<ffffffff810989af>] [<ffffffff810989af>] smpboot_thread_fn+0x19f/0x1b0
[ 0.108000] RSP: 0000:ffff88079677be88 EFLAGS: 00010202
[ 0.108000] RAX: 0000000000000000 RBX: ffff8807966f7010 RCX: 0000000000000000
[ 0.108000] RDX: ffff88079677bfd8 RSI: ffff8807966f7010 RDI: 0000000000000001
[ 0.108000] RBP: ffff88079677bec8 R08: ffff880796778000 R09: 0000000000000246
[ 0.108000] R10: ffffffff8106b17c R11: ffffea001e59d800 R12: ffff8807a1001b20
[ 0.108000] R13: ffffffff81c40d20 R14: ffff8807966f7010 R15: ffff8807966f7010
[ 0.108000] FS: 0000000000000000(0000) GS:ffff8807bfc00000(0000) knlGS:0000000000000000
[ 0.108000] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 0.108000] CR2: ffff8807bffff000 CR3: 0000000001c13000 CR4: 00000000001406f0
[ 0.108000] Stack:
[ 0.108000] 0000000000000000 ffff88079677bea0 ffffffff8176bc39 ffff8807965d3140
[ 0.108000] ffff8807a1001b20 ffffffff81098810 0000000000000000 0000000000000000
[ 0.108000] ffff88079677bf48 ffffffff810915f2 0000000000000001 0000000000000001
[ 0.108000] Call Trace:
[ 0.108000] [<ffffffff8176bc39>] ? schedule+0x29/0x70
[ 0.108000] [<ffffffff81098810>] ? SyS_setgroups+0x180/0x180
[ 0.108000] [<ffffffff810915f2>] kthread+0xd2/0xf0
[ 0.108000] [<ffffffff81091520>] ? kthread_create_on_node+0x1c0/0x1c0