** Tags added: patch -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1838627
Title: AppArmor onexec transition causes WARN kernel stack trace Status in linux package in Ubuntu: Incomplete Status in linux source package in Xenial: Confirmed Bug description: microk8s has reported on issue with the Xenial kernel where apparmor causes the following kernel stack trace due to an apparmor AA_BUG condition being triggered. [ 225.236085] ------------[ cut here ]------------ [ 225.236104] WARNING: CPU: 1 PID: 13726 at /build/linux-aUWTNP/linux-4.4.0/security/apparmor/file.c:136 aa_audit_file+0x16e/0x180() [ 225.236109] AppArmor WARN aa_audit_file: ((!(&sa)->apparmor_audit_data->request)): [ 225.236113] Modules linked in: [ 225.236118] btrfs xor raid6_pq ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs veth xt_nat xt_mark xt_comment ip_vs_sh ip_vs_wrr ip_vs_rr ip_vs libcrc32c ctr ccm ipt_MASQUERADE nf_nat_masquerade_ipv4 nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo iptable_nat nf_nat_ipv4 br_netfilter bridge stp llc pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) bnep aufs overlay binfmt_misc drbg ansi_cprng dm_crypt snd_hda_codec_hdmi arc4 eeepc_wmi asus_wmi sparse_keymap nvidia_uvm(POE) mxm_wmi joydev input_leds btusb btrtl btbcm btintel bluetooth snd_usb_audio snd_usbmidi_lib snd_hda_intel snd_hda_codec intel_rapl x86_pkg_temp_thermal snd_hda_core intel_powerclamp snd_hwdep coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel snd_ens1371 snd_ac97_codec gameport ac97_bus [ 225.236305] snd_seq_midi aesni_intel snd_pcm snd_seq_midi_event aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd snd_rawmidi snd_seq iwlmvm snd_seq_device serio_raw snd_timer mac80211 snd soundcore iwlwifi cfg80211 mei_me mei shpchp 8250_fintek wmi acpi_pad mac_hid ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 xt_hl ip6t_rt nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT nf_reject_ipv4 nf_log_ipv4 nf_log_common xt_LOG xt_recent xt_limit xt_tcpudp xt_addrtype nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack ip6table_filter ip6_tables nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack parport_pc iptable_filter ip_tables ppdev x_tables lp parport autofs4 hid_generic usbhid hid nvidia_drm(POE) nvidia_modeset(POE) nvidia(POE) i915_bpo psmouse e1000e intel_ips ptp i2c_algo_bit [ 225.236420] pps_core drm_kms_helper nvme syscopyarea sysfillrect sysimgblt fb_sys_fops ahci drm libahci video fjes [ 225.236446] CPU: 1 PID: 13726 Comm: runc:[2:INIT] Tainted: P W OE 4.4.0-154-generic #181-Ubuntu [ 225.236451] Hardware name: System manufacturer System Product Name/PRIME H270-PRO, BIOS 0323 01/04/2017 [ 225.236456] 0000000000000286 fa217f3573a84520 ffff88033ade39d0 ffffffff8140b481 [ 225.236464] ffff88033ade3a18 ffffffff81d03018 ffff88033ade3a08 ffffffff81085432 [ 225.236477] ffff88035cb2f000 ffff88033ade3b6c ffff88033bcb8b88 ffff88033ade3d88 [ 225.236484] Call Trace: [ 225.236498] [<ffffffff8140b481>] dump_stack+0x63/0x82 [ 225.236509] [<ffffffff81085432>] warn_slowpath_common+0x82/0xc0 [ 225.236518] [<ffffffff810854cc>] warn_slowpath_fmt+0x5c/0x80 [ 225.236527] [<ffffffff81397ebc>] ? label_match.constprop.9+0x3dc/0x6c0 [ 225.236536] [<ffffffff813a696e>] aa_audit_file+0x16e/0x180 [ 225.236544] [<ffffffff813982dd>] profile_onexec+0x13d/0x3d0 [ 225.236554] [<ffffffff8139a33e>] handle_onexec+0x10e/0x10d0 [ 225.236562] [<ffffffff81242957>] ? vfs_getxattr_alloc+0x67/0x100 [ 225.236571] [<ffffffff81355395>] ? cap_inode_getsecurity+0x95/0x220 [ 225.236581] [<ffffffff8135965d>] ? security_inode_getsecurity+0x5d/0x70 [ 225.236589] [<ffffffff8139b417>] apparmor_bprm_set_creds+0x117/0xa60 [ 225.236596] [<ffffffff81242a8e>] ? vfs_getxattr+0x9e/0xb0 [ 225.236608] [<ffffffffc1439712>] ? ovl_getxattr+0x52/0xb0 [overlay] [ 225.236617] [<ffffffff8135619d>] ? get_vfs_caps_from_disk+0x7d/0x180 [ 225.236624] [<ffffffff81356343>] ? cap_bprm_set_creds+0xa3/0x5f0 [ 225.236633] [<ffffffff81358909>] security_bprm_set_creds+0x39/0x50 [ 225.236642] [<ffffffff812229d5>] prepare_binprm+0x85/0x190 [ 225.236651] [<ffffffff812240f4>] do_execveat_common.isra.31+0x4b4/0x770 [ 225.236661] [<ffffffff8122460a>] SyS_execve+0x3a/0x50 [ 225.236671] [<ffffffff81863f15>] stub_execve+0x5/0x5 [ 225.236678] [<ffffffff81863b9b>] ? entry_SYSCALL_64_fastpath+0x22/0xcb [ 225.236684] ---[ end trace 6b2beaa85ae31c29 ]--- This is caused when the change_onexec api is used and permitted by the profile but the task has the NO_NEW_PRIVS flag set causing the domain transition specified in the change_onexec request to fail. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1838627/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
