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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1593874

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1593874

Title:
  warning stack trace while playing with apparmor namespaces

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I'm not sure what exactly I was doing when this happened, but
  something fairly basic (creating containers, adding/removing
  profiles). Let me know if you need more than the trace and I can try
  and figure out how to reproduce.

  Jun 17 20:20:06 dev kernel: [13314.032676] ------------[ cut here ]------------
  Jun 17 20:20:06 dev kernel: [13314.032689] WARNING: CPU: 3 PID: 8964 at /build/linux-oXTOqc/linux-4.4.0/security/apparmor/label.c:82 __aa_proxy_redirect+0xff/0x130()
  Jun 17 20:20:06 dev kernel: [13314.032692] AppArmor WARN __aa_proxy_redirect: ((!!queued_write_can_lock(&(&(&(((((&((orig)->vec[0])))[(((orig)->size)) - 1])->ns))->labels)->lock)->raw_lock))): 
  Jun 17 20:20:06 dev kernel: [13314.032693] Modules linked in: binfmt_misc veth xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack xt_tcpudp bridge stp llc iptable_filter ip_tables x_tables isofs zfs(PO) zunicode(PO) zcommon(PO) znvpair(PO) spl(O) zavl(PO) ppdev kvm_intel kvm joydev serio_raw irqbypass parport_pc parport ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear psmouse floppy
  Jun 17 20:20:06 dev kernel: [13314.032751] CPU: 3 PID: 8964 Comm: lxd Tainted: P        W  O    4.4.0-24-generic #43-Ubuntu
  Jun 17 20:20:06 dev kernel: [13314.032753] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
  Jun 17 20:20:06 dev kernel: [13314.032756]  0000000000000286 00000000dc104ca4 ffff880044db3d18 ffffffff813eab23
  Jun 17 20:20:06 dev kernel: [13314.032760]  ffff880044db3d60 ffffffff81cec7f0 ffff880044db3d50 ffffffff810810d2
  Jun 17 20:20:06 dev kernel: [13314.032763]  ffff880047f04360 ffff88007a08d360 ffff88004a551b00 ffff88004a551b38
  Jun 17 20:20:06 dev kernel: [13314.032766] Call Trace:
  Jun 17 20:20:06 dev kernel: [13314.032773]  [<ffffffff813eab23>] dump_stack+0x63/0x90
  Jun 17 20:20:06 dev kernel: [13314.032777]  [<ffffffff810810d2>] warn_slowpath_common+0x82/0xc0
  Jun 17 20:20:06 dev kernel: [13314.032780]  [<ffffffff8108116c>] warn_slowpath_fmt+0x5c/0x80
  Jun 17 20:20:06 dev kernel: [13314.032784]  [<ffffffff81380292>] ? __list_remove_profile+0x62/0xe0
  Jun 17 20:20:06 dev kernel: [13314.032788]  [<ffffffff8138abcf>] __aa_proxy_redirect+0xff/0x130
  Jun 17 20:20:06 dev kernel: [13314.032792]  [<ffffffff81395dc6>] destroy_ns+0x86/0xa0
  Jun 17 20:20:06 dev kernel: [13314.032794]  [<ffffffff81395d0f>] __aa_remove_ns+0x2f/0x60
  Jun 17 20:20:06 dev kernel: [13314.032798]  [<ffffffff81382a63>] aa_remove_profiles+0x193/0x270
  Jun 17 20:20:06 dev kernel: [13314.032800]  [<ffffffff81379721>] ? __aa_kvmalloc+0x41/0x60
  Jun 17 20:20:06 dev kernel: [13314.032803]  [<ffffffff8137724e>] profile_remove+0x9e/0x1f0
  Jun 17 20:20:06 dev kernel: [13314.032808]  [<ffffffff8120c468>] __vfs_write+0x18/0x40
  Jun 17 20:20:06 dev kernel: [13314.032811]  [<ffffffff8120cdf9>] vfs_write+0xa9/0x1a0
  Jun 17 20:20:06 dev kernel: [13314.032814]  [<ffffffff8120bd8f>] ? do_sys_open+0x1bf/0x2a0
  Jun 17 20:20:06 dev kernel: [13314.032818]  [<ffffffff8120dab5>] SyS_write+0x55/0xc0
  Jun 17 20:20:06 dev kernel: [13314.032823]  [<ffffffff81825bf2>] entry_SYSCALL_64_fastpath+0x16/0x71
  Jun 17 20:20:06 dev kernel: [13314.032826] ---[ end trace 2eb06377c45f3d4c ]---

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