[ 48.748148] BUG: unable to handle kernel [ 48.751897] AppArmor: free_aa_profile: internal error, profile '' still on ns list [ 48.757536] NULL pointer dereference at 0000000000000009 [ 48.757536] IP: [<ffffffff812755fc>] kref_get+0xc/0x30 [ 48.757536] PGD 801dc3067 PUD 80119b067 PMD 0 [ 48.757536] Oops: 0000 [#1] SMP [ 48.757536] last sysfs file: /sys/kernel/uevent_seqnum [ 48.757536] CPU 1 [ 48.757536] Modules linked in: usb_storage usbhid forcedeth [ 48.757536] Pid: 2007, comm: debconf-set-sel Tainted: G W 2.6.31-14-generic #48-Ubuntu Sun Fire X4240 [ 48.757536] RIP: 0010:[<ffffffff812755fc>] [<ffffffff812755fc>] kref_get+0xc/0x30 [ 48.757536] RSP: 0018:ffff880801c57d20 EFLAGS: 00010282 [ 48.757536] RAX: 0000000000000000 RBX: 0000000000000009 RCX: 000000000003ffff [ 48.757536] RDX: 0000000000000000 RSI: 0000000000000086 RDI: 0000000000000009 [ 48.757536] RBP: ffff880801c57d30 R08: 0000000000000034 R09: 0000000000012589 [ 49.781684] R10: 0000000000000005 R11: 0000000000000000 R12: ffff88080115c410 [ 49.781684] R13: 0000000001200011 R14: ffff880801c57f58 R15: 00007fee244d57b0 [ 49.781684] FS: 00007fee244d56e0(0000) GS:ffffc90000200000(0000) knlGS:0000000000000000 [ 49.781684] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 49.781684] CR2: 0000000000000009 CR3: 0000000801db4000 CR4: 00000000000006e0 [ 49.781684] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 49.781684] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 49.781684] Process debconf-set-sel (pid: 2007, threadinfo ffff880801c56000, task ffff88080115c410)