No, which means its a race of some kind -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to apparmor in Ubuntu. https://bugs.launchpad.net/bugs/1579135
Title: kernel BUG on snap disconnect from within a snap Status in apparmor package in Ubuntu: Incomplete Bug description: First, a bit of background: I've built a go binary of the upstream snappy integration tests, and built them into a snap so that we can easily keep them up to date, and call them from other test suites. I'm running through the tests in qemu on a current 16 image (built yesteray), and hitting this most of the time with the homeInterface Suite tests in particular. The networkInterfaceSuite tests also seem to produce a similar problem: sudo snap connect home-consumer:home ubuntu-core:home [/] Connect home-consumer:home to ubuntu-core:home home-consumer.writer /home/ubuntu/snap/snappy-tests/100001/writable sudo snap disconnect home-consumer:home ubuntu-core:home [ 519.416354] BUG: unable to handle kernel NULL pointer dereference at 0000000000000038 [ 519.417327] IP: [<ffffffff81388eef>] profile_cmp+0x2f/0x180 [ 519.417978] PGD 1f26a067 PUD 1aa4f067 PMD 0 [ 519.418574] Oops: 0000 [#1] SMP [ 519.419032] Modules linked in: kvm_intel joydev kvm ppdev snd_pcm snd_timer irqbypass snd soundcore parport_pc pcspkr input_leds floppy parport evbug psmouse e1000 8250_fintek i2c_piix4 mac_hid pata_acpi serio_raw autofs4 nls_iso8859_1 usb_storage ahci libahci squashfs [ 519.422747] CPU: 0 PID: 1915 Comm: apparmor_parser Tainted: G W 4.4.0-21-generic #37-Ubuntu [ 519.423689] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014 [ 519.424627] task: ffff88001d23cb00 ti: ffff88001b58c000 task.ti: ffff88001b58c000 [ 519.425385] RIP: 0010:[<ffffffff81388eef>] [<ffffffff81388eef>] profile_cmp+0x2f/0x180 [ 519.426242] RSP: 0018:ffff88001b58fcb0 EFLAGS: 00010086 [ 519.426791] RAX: 0000000000000000 RBX: ffff88001b1b1400 RCX: 0000000000000006 [ 519.427628] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000009 [ 519.428405] RBP: ffff88001b58fcc0 R08: 000000000000000a R09: 0000000000000274 [ 519.429127] R10: ffff88001f236890 R11: 0000000000000274 R12: 0000000000000000 [ 519.429956] R13: 000000000000000b R14: 0000000000000000 R15: ffff88001abff950 [ 519.430957] FS: 00007f0c1609b740(0000) GS:ffff88001fc00000(0000) knlGS:0000000000000000 [ 519.432256] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 519.433030] CR2: 0000000000000038 CR3: 000000001b14b000 CR4: 00000000000006f0 [ 519.433868] Stack: [ 519.434204] 000000000000000c ffff88001abff9b0 ffff88001b58fd08 ffffffff8138a0c3 [ 519.435355] 000000011f2b9450 ffff88000000000c ffff88001abff950 ffff88001b1b1760 [ 519.436480] ffff88001f236848 ffff88001abff900 ffff88001f236840 ffff88001b58fd98 [ 519.437609] Call Trace: [ 519.438007] [<ffffffff8138a0c3>] aa_vec_unique+0x163/0x240 [ 519.438709] [<ffffffff8138e337>] __aa_labelset_update_subtree+0x687/0x820 [ 519.439537] [<ffffffff813811fb>] aa_replace_profiles+0x59b/0xb70 [ 519.440268] [<ffffffff811ec5ae>] ? __kmalloc+0x22e/0x250 [ 519.440944] [<ffffffff81375f1f>] policy_update+0x9f/0x1f0 [ 519.441617] [<ffffffff81376083>] profile_replace+0x13/0x20 [ 519.442299] [<ffffffff8120bf38>] __vfs_write+0x18/0x40 [ 519.443032] [<ffffffff8120c8c9>] vfs_write+0xa9/0x1a0 [ 519.443721] [<ffffffff8120b85f>] ? do_sys_open+0x1bf/0x2a0 [ 519.444416] [<ffffffff8120d585>] SyS_write+0x55/0xc0 [ 519.445042] [<ffffffff818244f2>] entry_SYSCALL_64_fastpath+0x16/0x71 [ 519.445802] Code: 00 55 48 85 ff 48 89 e5 41 54 53 49 89 f4 48 89 fb 0f 84 8b 00 00 00 4d 85 e4 0f 84 aa 00 00 00 48 83 7b 38 00 0f 84 c9 00 00 00 <49> 83 7c 24 38 00 0f 84 e8 00 00 00 48 83 7b 08 00 0f 84 07 01 [ 519.451336] RIP [<ffffffff81388eef>] profile_cmp+0x2f/0x180 [ 519.452088] RSP <ffff88001b58fcb0> [ 519.452570] CR2: 0000000000000038 [ 519.453032] ---[ end trace 65ff12ee2e7c26af ]--- The details of this test can be found at: https://github.com/ubuntu-core/snappy/tree/master/integration-tests/data/snaps/home-consumer Will follow up with more details To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apparmor/+bug/1579135/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
