Comment 1 for bug 1378123

The "AppArmor WARN __label_update" warnings are occuring on a production system:

$ uname -a
Linux svbom 3.19.0-18-generic #18-Ubuntu SMP Tue May 19 18:31:35 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=15.04
DISTRIB_CODENAME=vivid
DISTRIB_DESCRIPTION="Ubuntu 15.04"

Two dmesg excerpts:

--
[56434.648170] br3: port 6(vnet18) entered disabled state
[56434.648212] device vnet18 left promiscuous mode
[56434.648215] br3: port 6(vnet18) entered disabled state
[56435.050149] ------------[ cut here ]------------
[56435.050155] WARNING: CPU: 6 PID: 24903 at /build/buildd/linux-3.19.0/security/apparmor/label.c:1767 __aa_labelset_update_all+0x710/0x800()
[56435.050156] AppArmor WARN __label_update: ((__aa_label_remove_and_insert((&(((label)->ent[(label)->size - 1])->ns)->labels), label, l) != l)):
[56435.050157] Modules linked in:
[56435.050159] joydev hid_generic usbhid hid vhost_net vhost macvtap macvlan ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables bridge stp llc intel_rapl iosf_mbi x86_pkg_temp_thermal ipmi_ssif intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel hpilo lpc_ich aes_x86_64 lrw ie31200_edac gf128mul shpchp glue_helper 8250_fintek ipmi_si ablk_helper edac_core ipmi_msghandler cryptd mac_hid acpi_power_meter serio_raw lp parport autofs4 tg3 ahci ptp psmouse libahci pps_core hpsa
[56435.050182] CPU: 6 PID: 24903 Comm: apparmor_parser Tainted: G W 3.19.0-18-generic #18-Ubuntu
[56435.050183] Hardware name: HP ProLiant DL320e Gen8 v2, BIOS P80 09/01/2013
[56435.050184] ffffffff81ad2178 ffff8806d006bd38 ffffffff817c27cd 0000000000000007
[56435.050186] ffff8806d006bd88 ffff8806d006bd78 ffffffff8107593a ffff8806f4267408
[56435.050187] ffff88060a74dd00 0000000000000000 ffff8806b55f6e00 0000000000000002
[56435.050188] Call Trace:
[56435.050192] [<ffffffff817c27cd>] dump_stack+0x45/0x57
[56435.050195] [<ffffffff8107593a>] warn_slowpath_common+0x8a/0xc0
[56435.050196] [<ffffffff810759b6>] warn_slowpath_fmt+0x46/0x50
[56435.050199] [<ffffffff81358b65>] ? __aa_label_remove_and_insert+0x85/0x1a0
[56435.050200] [<ffffffff8135c8f0>] __aa_labelset_update_all+0x710/0x800
[56435.050203] [<ffffffff8131518a>] ? securityfs_remove+0x9a/0xb0
[56435.050205] [<ffffffff81351bf8>] aa_remove_profiles+0x148/0x500
[56435.050206] [<ffffffff81348b1a>] ? aa_simple_write_to_buffer+0x7a/0xa0
[56435.050208] [<ffffffff81348b7e>] profile_remove+0x3e/0x70
[56435.050210] [<ffffffff811f38a7>] vfs_write+0xb7/0x1f0
[56435.050212] [<ffffffff811f2a29>] ? do_sys_open+0x1b9/0x280
[56435.050214] [<ffffffff811f44b6>] SyS_write+0x46/0xb0
[56435.050216] [<ffffffff817c990d>] system_call_fastpath+0x16/0x1b
[56435.050217] ---[ end trace 00bcc1692506d99a ]---
--

--
[61376.416886] br3: port 7(vnet20) entered disabled state
[61376.416934] device vnet20 left promiscuous mode
[61376.416937] br3: port 7(vnet20) entered disabled state
[61376.706953] ------------[ cut here ]------------
[61376.706969] WARNING: CPU: 3 PID: 33012 at /build/buildd/linux-3.19.0/security/apparmor/label.c:1767 __aa_labelset_update_all+0x710/0x800()
[61376.706970] AppArmor WARN __label_update: ((__aa_label_remove_and_insert((&(((label)->ent[(label)->size - 1])->ns)->labels), label, l) != l)):
[61376.706971] Modules linked in:
[61376.706972] joydev hid_generic usbhid hid vhost_net vhost macvtap macvlan ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables bridge stp llc intel_rapl iosf_mbi x86_pkg_temp_thermal ipmi_ssif intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel hpilo lpc_ich aes_x86_64 lrw ie31200_edac gf128mul shpchp glue_helper 8250_fintek ipmi_si ablk_helper edac_core ipmi_msghandler cryptd mac_hid acpi_power_meter serio_raw lp parport autofs4 tg3 ahci ptp psmouse libahci pps_core hpsa
[61376.706995] CPU: 3 PID: 33012 Comm: apparmor_parser Tainted: G W 3.19.0-18-generic #18-Ubuntu
[61376.706996] Hardware name: HP ProLiant DL320e Gen8 v2, BIOS P80 09/01/2013
[61376.706997] ffffffff81ad2178 ffff88052380fd38 ffffffff817c27cd 0000000000000007
[61376.706998] ffff88052380fd88 ffff88052380fd78 ffffffff8107593a ffff8806f4267408
[61376.706999] ffff880609de6300 0000000000000000 ffff88060a6ce800 0000000000000002
[61376.707001] Call Trace:
[61376.707005] [<ffffffff817c27cd>] dump_stack+0x45/0x57
[61376.707007] [<ffffffff8107593a>] warn_slowpath_common+0x8a/0xc0
[61376.707009] [<ffffffff810759b6>] warn_slowpath_fmt+0x46/0x50
[61376.707012] [<ffffffff81358b65>] ? __aa_label_remove_and_insert+0x85/0x1a0
[61376.707013] [<ffffffff8135c8f0>] __aa_labelset_update_all+0x710/0x800
[61376.707015] [<ffffffff8131518a>] ? securityfs_remove+0x9a/0xb0
[61376.707017] [<ffffffff81351bf8>] aa_remove_profiles+0x148/0x500
[61376.707019] [<ffffffff81348b1a>] ? aa_simple_write_to_buffer+0x7a/0xa0
[61376.707020] [<ffffffff81348b7e>] profile_remove+0x3e/0x70
[61376.707023] [<ffffffff811f38a7>] vfs_write+0xb7/0x1f0
[61376.707024] [<ffffffff811f2a29>] ? do_sys_open+0x1b9/0x280
[61376.707026] [<ffffffff811f44b6>] SyS_write+0x46/0xb0
[61376.707028] [<ffffffff817c990d>] system_call_fastpath+0x16/0x1b
[61376.707029] ---[ end trace 00bcc1692506d99b ]---
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