Comment 0 for bug 1550755

Hiya

I periodically do a full reinstall of all packages just to see what breaks. Today it's the kernel :) Oddly I have reproduced this on several machines. Simply fire up aptitude, go to "Installed" packages, hit Shift-L to reinstall, then g and g again to kick it off. When I get to bind9 I reliably see this:

Feb 27 17:15:18 maas named[35942]: exiting
Feb 27 17:15:18 maas named[35942]: ../../../lib/isc/mem.c:1229: REQUIRE(ctx->references == 1) failed
Feb 27 17:15:19 maas kernel: [ 1422.530027] ------------[ cut here ]------------
Feb 27 17:15:19 maas kernel: [ 1422.535184] kernel BUG at /build/linux-WmE1Ft/linux-4.4.0/kernel/cred.c:431!
Feb 27 17:15:19 maas kernel: [ 1422.543052] invalid opcode: 0000 [#1] SMP
Feb 27 17:15:19 maas kernel: [ 1422.547637] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs 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 ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi bonding nls_iso8859_1 ipmi_ssif ipmi_devintf intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel dcdbas kvm irqbypass joydev input_leds sb_edac mei_me edac_core mei shpchp lpc_ich ipmi_si ipmi_msghandler 8250_fintek acpi_power_meter mac_hid autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid1 raid0 multipath linear uas hid_generic ixgbe usb_storage usbhid bnx2x hid dca vxlan crct10dif_pclmul tg3 ip6_udp_tunnel crc32_pclmul udp_tunnel aesni_intel aes_x86_64 lrw ptp gf128mul glue_helper ablk_helper cryptd pps_core megaraid_sas mdio libcrc32c wmi fjes
Feb 27 17:15:19 maas kernel: [ 1422.647254] CPU: 19 PID: 35942 Comm: named Not tainted 4.4.0-8-generic #23-Ubuntu
Feb 27 17:15:19 maas kernel: [ 1422.655605] Hardware name: Dell Inc. PowerEdge R430/03XKDV, BIOS 1.5.4 10/05/2015
Feb 27 17:15:19 maas kernel: [ 1422.663956] task: ffff88102afa0dc0 ti: ffff881026fe4000 task.ti: ffff881026fe4000
Feb 27 17:15:19 maas kernel: [ 1422.672307] RIP: 0010:[<ffffffff8109fcbd>] [<ffffffff8109fcbd>] commit_creds+0x20d/0x250
Feb 27 17:15:19 maas kernel: [ 1422.681446] RSP: 0018:ffff881026fe7940 EFLAGS: 00010206
Feb 27 17:15:19 maas kernel: [ 1422.687373] RAX: 0000000000000000 RBX: ffff881029224c30 RCX: ffff881032d15c00
Feb 27 17:15:19 maas kernel: [ 1422.695337] RDX: 0000000000000009 RSI: 0000000000000001 RDI: ffff88102aae0180
Feb 27 17:15:19 maas kernel: [ 1422.703299] RBP: ffff881026fe7960 R08: ffff88103d6d9f60 R09: ffff88103cc07c00
Feb 27 17:15:19 maas kernel: [ 1422.711260] R10: ffffea00407be000 R11: 0000000000000000 R12: ffff8810349b0fc0
Feb 27 17:15:19 maas kernel: [ 1422.719222] R13: ffff88102afa0dc0 R14: 00007ffffffff000 R15: ffff881026fe7ad0
Feb 27 17:15:19 maas kernel: [ 1422.727186] FS: 00007fa6a87bb740(0000) GS:ffff88103d6c0000(0000) knlGS:0000000000000000
Feb 27 17:15:19 maas kernel: [ 1422.736215] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Feb 27 17:15:19 maas kernel: [ 1422.742625] CR2: 00007ff0731e1000 CR3: 000000101af82000 CR4: 00000000001406e0
Feb 27 17:15:19 maas kernel: [ 1422.750586] Stack:
Feb 27 17:15:19 maas kernel: [ 1422.752826] 000000008bfc6f2a ffff881029224c30 ffff8810297d1a20 ffff88102aae0180
Feb 27 17:15:19 maas kernel: [ 1422.761113] ffff881026fe7988 ffffffff8137111b ffff881029224c30 ffff880034ae8800
Feb 27 17:15:19 maas kernel: [ 1422.769403] 0000000000000000 ffff881026fe79b0 ffffffff8137b212 ffffffff811e6fea
Feb 27 17:15:19 maas kernel: [ 1422.777691] Call Trace:
Feb 27 17:15:19 maas kernel: [ 1422.780420] [<ffffffff8137111b>] aa_replace_current_label+0xeb/0x140
Feb 27 17:15:19 maas kernel: [ 1422.787609] [<ffffffff8137b212>] apparmor_file_alloc_security+0xc2/0x160
Feb 27 17:15:19 maas kernel: [ 1422.795185] [<ffffffff811e6fea>] ? kmem_cache_alloc+0x1ba/0x1e0
Feb 27 17:15:19 maas kernel: [ 1422.801889] [<ffffffff81337eb3>] security_file_alloc+0x33/0x50
Feb 27 17:15:19 maas kernel: [ 1422.808495] [<ffffffff81209d5a>] get_empty_filp+0x9a/0x1c0
Feb 27 17:15:19 maas kernel: [ 1422.814714] [<ffffffff812163ed>] path_openat+0x3d/0x1280
Feb 27 17:15:19 maas kernel: [ 1422.820738] [<ffffffff810c0a84>] ? __wake_up+0x44/0x50
Feb 27 17:15:19 maas kernel: [ 1422.826569] [<ffffffff8128f08b>] ? ext4_free_inode+0x22b/0x630
Feb 27 17:15:19 maas kernel: [ 1422.833174] [<ffffffff81218801>] do_filp_open+0x91/0x100
Feb 27 17:15:19 maas kernel: [ 1422.839198] [<ffffffff810e4ec7>] ? call_rcu_sched+0x17/0x20
Feb 27 17:15:19 maas kernel: [ 1422.845515] [<ffffffff812b3f1b>] ? ext4_destroy_inode+0x3b/0xa0
Feb 27 17:15:19 maas kernel: [ 1422.852218] [<ffffffff8124a7bc>] ? __fsnotify_inode_delete+0x1c/0x20
Feb 27 17:15:19 maas kernel: [ 1422.859406] [<ffffffff812235d8>] ? destroy_inode+0x38/0x60
Feb 27 17:15:19 maas kernel: [ 1422.865622] [<ffffffff8122372d>] ? evict+0x12d/0x190
Feb 27 17:15:19 maas kernel: [ 1422.871257] [<ffffffff812177a4>] ? putname+0x54/0x60
Feb 27 17:15:19 maas kernel: [ 1422.876892] [<ffffffff81217664>] ? getname_kernel+0x34/0x120
Feb 27 17:15:19 maas kernel: [ 1422.883302] [<ffffffff81207237>] file_open_name+0xf7/0x150
Feb 27 17:15:19 maas kernel: [ 1422.889520] [<ffffffff812072c3>] filp_open+0x33/0x60
Feb 27 17:15:19 maas kernel: [ 1422.895156] [<ffffffff8126a8a1>] do_coredump+0x4c1/0xe90
Feb 27 17:15:19 maas kernel: [ 1422.901178] [<ffffffff81371851>] ? profile_signal_perm.part.4+0xb1/0x110
Feb 27 17:15:19 maas kernel: [ 1422.908754] [<ffffffff8108dec8>] get_signal+0x268/0x600
Feb 27 17:15:19 maas kernel: [ 1422.914681] [<ffffffff81016517>] do_signal+0x37/0x6f0
Feb 27 17:15:19 maas kernel: [ 1422.920413] [<ffffffff8108ccec>] ? do_send_sig_info+0x6c/0xa0
Feb 27 17:15:19 maas kernel: [ 1422.926921] [<ffffffff8100320c>] exit_to_usermode_loop+0x8c/0xd0
Feb 27 17:15:19 maas kernel: [ 1422.933719] [<ffffffff81003c2e>] syscall_return_slowpath+0x4e/0x60
Feb 27 17:15:19 maas kernel: [ 1422.940714] [<ffffffff81813fd0>] int_ret_from_sys_call+0x25/0x8f
Feb 27 17:15:19 maas kernel: [ 1422.947512] Code: ca 48 81 fa 20 25 e4 81 0f 84 6c fe ff ff 48 8b 8a c8 00 00 00 48 39 ce 75 e4 3b 82 d4 00 00 00 0f 84 9a fe ff ff 48 89 f2 eb d6 <0f> 0b 0f 0b e8 2a ed fd ff 49 8b 44 24 30 48 89 c2 f7 d0 48 c1
Feb 27 17:15:19 maas kernel: [ 1422.969091] RIP [<ffffffff8109fcbd>] commit_creds+0x20d/0x250
Feb 27 17:15:19 maas kernel: [ 1422.975608] RSP <ffff881026fe7940>
Feb 27 17:15:19 maas kernel: [ 1422.979523] ---[ end trace 9e5c57f08d29feb8 ]---