group.of.nepali.translators team mailing list archive

[Stefan Bader <stefan.bader@xxxxxxxxxxxxx>]

For Zesty the change was already applied as "UBUNTU: SAUCE: apparmor: fix parameters so that the permission test is bypas
sed at boot" (see bug #1678048) in 4.10.0-17.19 (pre release).

** Changed in: linux (Ubuntu Xenial)
       Status: New => Fix Committed

** Changed in: linux (Ubuntu Zesty)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1626984

Title:
  kernel BUG at /build/linux-lts-xenial-_hWfOZ/linux-lts-
  xenial-4.4.0/security/apparmor/include/context.h:69!

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Zesty:
  Fix Released

Bug description:
  I am runing sosreport on ubuntu 14.04.4 LTS which has upgrade the kernel to 4.4.0-38-generic, it get oops while copying /sys/module/apparmor/parameters/audit. and it also can be triggered with
  cat /sys/module/apparmor/parameters/audit.

  [  213.174092] ------------[ cut here ]------------
  [  213.174130] kernel BUG at /build/linux-lts-xenial-_hWfOZ/linux-lts-xenial-4.4.0/security/apparmor/include/context.h:69!
  [  213.174187] invalid opcode: 0000 [#1] SMP 
  [  213.174215] Modules linked in: ppdev lp joydev serio_raw parport_pc parport psmouse virtio_scsi floppy
  [  213.174283] CPU: 0 PID: 2246 Comm: cat Not tainted 4.4.0-38-generic #57~14.04.1-Ubuntu
  [  213.174324] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.8.2-0-g33fbe13 by qemu-project.org 04/01/2014
  [  213.174380] task: ffff880037b15780 ti: ffff8800399c4000 task.ti: ffff8800399c4000
  [  213.174419] RIP: 0010:[<ffffffff813888a1>]  [<ffffffff813888a1>] aa_current_raw_label.part.6+0x4/0x6
  [  213.174478] RSP: 0018:ffff8800399c7d60  EFLAGS: 00010246
  [  213.174506] RAX: 0000000000000000 RBX: ffff88003a426000 RCX: ffff88003e3802a0
  [  213.174542] RDX: ffff88003a426000 RSI: ffffffff81ddc0d8 RDI: ffff88003a426000
  [  213.174578] RBP: ffff8800399c7d60 R08: ffff88003e3802a0 R09: 0000000000000000
  [  213.174614] R10: 0000000000001000 R11: 0000000000000246 R12: ffffffff81e44ae0
  [  213.174658] R13: ffff88003e3802a0 R14: ffffffff81e4c220 R15: ffff88003c2b2e40
  [  213.174702] FS:  00007f7bea106740(0000) GS:ffff88003fc00000(0000) knlGS:0000000000000000
  [  213.174743] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [  213.174781] CR2: 0000000000a40038 CR3: 000000003cdfa000 CR4: 00000000000006f0
  [  213.174819] Stack:
  [  213.174832]  ffff8800399c7d88 ffffffff8136d58a ffff88003a426000 ffff88003a426000
  [  213.174885]  ffff88003e3802a0 ffff8800399c7da0 ffffffff8136fda2 ffff88003e39c5f0
  [  213.174928]  ffff8800399c7dd0 ffffffff8109a7e4 ffff88003c2b2e40 ffffffff81a170c0
  [  213.174971] Call Trace:
  [  213.174996]  [<ffffffff8136d58a>] policy_view_capable+0x1ba/0x220
  [  213.175030]  [<ffffffff8136fda2>] param_get_audit+0x12/0x50
  [  213.175062]  [<ffffffff8109a7e4>] param_attr_show+0x54/0xa0
  [  213.175092]  [<ffffffff8109a20d>] module_attr_show+0x1d/0x30
  [  213.175130]  [<ffffffff8127a6e2>] sysfs_kf_seq_show+0xc2/0x1a0
  [  213.175162]  [<ffffffff81278f73>] kernfs_seq_show+0x23/0x30
  [  213.175199]  [<ffffffff81220d55>] seq_read+0xe5/0x350
  [  213.175227]  [<ffffffff8127970d>] kernfs_fop_read+0x10d/0x170
  [  213.176170]  [<ffffffff811fda18>] __vfs_read+0x18/0x40
  [  213.177101]  [<ffffffff811fdfcf>] vfs_read+0x7f/0x130
  [  213.178016]  [<ffffffff811feda6>] SyS_read+0x46/0xa0
  [  213.178932]  [<ffffffff817fa336>] entry_SYSCALL_64_fastpath+0x16/0x75
  [  213.179814] Code: 80 3d 1a 7f b8 00 00 75 1d 55 be 2e 00 00 00 48 c7 c7 f0 2f cb 81 48 89 e5 e8 7c 50 cf ff 5d c6 05 fb 7e b8 00 01 c3 55 48 89 e5 <0f> 0b b8 01 00 00 00 3e 0f c1 07 ff c0 ff c8 7f 26 80 3d df 7e 
  [  213.182634] RIP  [<ffffffff813888a1>] aa_current_raw_label.part.6+0x4/0x6
  [  213.183528]  RSP <ffff8800399c7d60>

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