kernel-packages team mailing list archive

[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 1539349

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

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1539349

Title:
  sleep from invalid context in aa_move_mount

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  In xenial master-next, when I cp /bin/mount /home/ubuntu/mount, define
  the following policy:

  #include <tunables/global>
  /home/ubuntu/mount {
    #include <abstractions/base>
    #include <abstractions/nameservice>

    capability,
    network,
    mount,
    /** mkrwixr,
  }

  And then run the following script under sudo from ~/ubuntu:

  #!/bin/sh

  apparmor_parser -r /home/ubuntu/mount.aa
  umount -l a/b
  umount -l a/a
  umount -l a
  rm -rf a
  mkdir a
  mount --bind a a
  mount --make-slave a
  mkdir a/a a/b
  mount -t tmpfs tmpfs a/a
  /home/ubuntu/mount --move a/a a/b

  I get the following kernel warning:

  Jan 29 02:36:06 seth kernel: audit: type=1400 audit(1454034966.022:15): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/home/ubuntu/mount" pid=1179 comm="apparmor_parser"
  Jan 29 02:36:06 seth kernel: BUG: sleeping function called from invalid context at mm/slub.c:1287
  Jan 29 02:36:06 seth kernel: in_atomic(): 1, irqs_disabled(): 0, pid: 1189, name: mount
  Jan 29 02:36:06 seth kernel: no locks held by mount/1189.
  Jan 29 02:36:06 seth kernel: CPU: 0 PID: 1189 Comm: mount Not tainted 4.4.0+ #4
  Jan 29 02:36:06 seth kernel: Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
  Jan 29 02:36:06 seth kernel:  0000000000000000 00000000a02414bf ffff88007784fc28 ffffffff81449309
  Jan 29 02:36:06 seth kernel:  ffff880079129580 ffff88007784fc50 ffffffff810b5789 ffffffff81ce0e60
  Jan 29 02:36:06 seth kernel:  0000000000000507 0000000000000000 ffff88007784fc78 ffffffff810b5889
  Jan 29 02:36:06 seth kernel: Call Trace:
  Jan 29 02:36:06 seth kernel:  [<ffffffff81449309>] dump_stack+0x4b/0x72
  Jan 29 02:36:06 seth kernel:  [<ffffffff810b5789>] ___might_sleep+0x179/0x230
  Jan 29 02:36:06 seth kernel:  [<ffffffff810b5889>] __might_sleep+0x49/0x80
  Jan 29 02:36:06 seth kernel:  [<ffffffff81258814>] ? getname_kernel+0x34/0x120
  Jan 29 02:36:06 seth kernel:  [<ffffffff81221fcb>] kmem_cache_alloc+0x1db/0x2a0
  Jan 29 02:36:06 seth kernel:  [<ffffffff81258814>] getname_kernel+0x34/0x120
  Jan 29 02:36:06 seth kernel:  [<ffffffff81258e96>] kern_path+0x16/0x30
  Jan 29 02:36:06 seth kernel:  [<ffffffff813e98ac>] aa_move_mount+0x17c/0x320
  Jan 29 02:36:06 seth kernel:  [<ffffffff813df7a3>] apparmor_sb_mount+0x233/0x2d0
  Jan 29 02:36:06 seth kernel:  [<ffffffff81392be7>] security_sb_mount+0x57/0x80
  Jan 29 02:36:06 seth kernel:  [<ffffffff8126f581>] do_mount+0xb1/0xe60
  Jan 29 02:36:06 seth kernel:  [<ffffffff811f0416>] ? __might_fault+0x96/0xa0
  Jan 29 02:36:06 seth kernel:  [<ffffffff811deae3>] ? memdup_user+0x53/0x80
  Jan 29 02:36:06 seth kernel:  [<ffffffff8127066f>] SyS_mount+0x9f/0x100
  Jan 29 02:36:06 seth kernel:  [<ffffffff818d0af6>] entry_SYSCALL_64_fastpath+0x16/0x76

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1539349/+subscriptions