Comment 12 for bug 1313450

Not here, still seeing the same problem, and not just with vsftpd:

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.04 LTS
Release: 14.04
Codename: trusty

Linux ip-10-0-0-46 3.13.0-27-generic #50-Ubuntu SMP Thu May 15 18:06:16 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

Jun 4 07:35:05 ip-10-0-0-46 kernel: [ 217.615216] BUG: Bad page map in process vsftpd pte:8000000000000965 pmd:031b1067
Jun 4 07:35:05 ip-10-0-0-46 kernel: [ 217.615228] page:ffffea0000000000 count:-34 mapcount:-34 mapping: (null) index:0x0
Jun 4 07:35:05 ip-10-0-0-46 kernel: [ 217.615232] page flags: 0x14(referenced|dirty)
Jun 4 07:35:05 ip-10-0-0-46 kernel: [ 217.615237] addr:00007fd10f153000 vm_flags:08100071 anon_vma:ffff88000314d8c0 mapping: (null) index:7fd10f153
Jun 4 07:35:05 ip-10-0-0-46 kernel: [ 217.615242] CPU: 0 PID: 1927 Comm: vsftpd Tainted: G B 3.13.0-27-generic #50-Ubuntu
Jun 4 07:35:05 ip-10-0-0-46 kernel: [ 217.615244] ffff8800e86b8540 ffff880003387c70 ffffffff817199c4 00007fd10f153000
Jun 4 07:35:05 ip-10-0-0-46 kernel: [ 217.615247] ffff880003387cb8 ffffffff81174503 8000001c689fe965 00000007fd10f153
Jun 4 07:35:05 ip-10-0-0-46 kernel: [ 217.615248] ffff8800031b1a98 ffffea0000000000 00007fd10f153000 00007fd10f154000
Jun 4 07:35:05 ip-10-0-0-46 kernel: [ 217.615250] Call Trace:
Jun 4 07:35:05 ip-10-0-0-46 kernel: [ 217.615256] [<ffffffff817199c4>] dump_stack+0x45/0x56
Jun 4 07:35:05 ip-10-0-0-46 kernel: [ 217.615260] [<ffffffff81174503>] print_bad_pte+0x1a3/0x250
Jun 4 07:35:05 ip-10-0-0-46 kernel: [ 217.615262] [<ffffffff81175ee7>] unmap_page_range+0x717/0x7f0
Jun 4 07:35:05 ip-10-0-0-46 kernel: [ 217.615264] [<ffffffff81176041>] unmap_single_vma+0x81/0xf0
Jun 4 07:35:05 ip-10-0-0-46 kernel: [ 217.615266] [<ffffffff811770b9>] unmap_vmas+0x49/0x90
Jun 4 07:35:05 ip-10-0-0-46 kernel: [ 217.615268] [<ffffffff8118026c>] exit_mmap+0x9c/0x170
Jun 4 07:35:05 ip-10-0-0-46 kernel: [ 217.615270] [<ffffffff8106482c>] mmput+0x5c/0x120
Jun 4 07:35:05 ip-10-0-0-46 kernel: [ 217.615273] [<ffffffff81069bbc>] do_exit+0x26c/0xa50
Jun 4 07:35:05 ip-10-0-0-46 kernel: [ 217.615275] [<ffffffff8109dd84>] ? vtime_account_user+0x54/0x60
Jun 4 07:35:05 ip-10-0-0-46 kernel: [ 217.615279] [<ffffffff8114d51f>] ? context_tracking_user_exit+0x4f/0xc0
Jun 4 07:35:05 ip-10-0-0-46 kernel: [ 217.615280] [<ffffffff8106a41f>] do_group_exit+0x3f/0xa0
Jun 4 07:35:05 ip-10-0-0-46 kernel: [ 217.615282] [<ffffffff8106a494>] SyS_exit_group+0x14/0x20
Jun 4 07:35:05 ip-10-0-0-46 kernel: [ 217.615285] [<ffffffff8172a5bf>] tracesys+0xe1/0xe6