apport information ** Tags added: apport-collected
** Description changed: Got this bug/oops while running with the linux-image-4.4.0-113-generic (4.4.0-113.136) kernel from -proposed: BUG: unable to handle kernel NULL pointer dereference at 0000000000000009 IP: [<ffffffffab413ad5>] csum_and_copy_from_iter+0x55/0x4c0 PGD 0 Oops: 0000 [#1] SMP Modules linked in: ctr ccm veth xt_CHECKSUM iptable_mangle xt_comment ec_sys bridge stp llc nf_log_ipv6 ip6table_filter ip6t_MASQUERADE nf_nat_masquerade_ipv6 ip6table_nat nf_nat_ipv6 ip6_tables nf_log_ip snd ghash_clmulni_intel soundcore r8169 psmouse input_leds cfg80211 rtsx_pci mii vhost_net vhost media ahci libahci macvtap macvlan mei_me mei kvm_intel kvm irqbypass tpm_crb i2c_hid intel_lpss_acpi inte CPU: 2 PID: 3997 Comm: dnsmasq Tainted: P W O 4.4.0-113-generic #136-Ubuntu Hardware name: System76 Lemur/Lemur, BIOS 5.12 02/17/2017 task: ffff880830269e00 ti: ffff880035c44000 task.ti: ffff880035c44000 RIP: 0010:[<ffffffffab413ad5>] [<ffffffffab413ad5>] csum_and_copy_from_iter+0x55/0x4c0 RSP: 0018:ffff880035c47a18 EFLAGS: 00010246 RAX: 00000000ab729fd0 RBX: 000000000000001c RCX: ffff880035c47e98 RDX: ffff880035c47a94 RSI: 000000000000001c RDI: ffff8807ef1a7424 RBP: ffff880035c47a80 R08: 0000000000000000 R09: ffff8807ef1a7424 R10: ffff8807ef1a7424 R11: ffff8807ef1a7400 R12: ffff880035c47e98 R13: 0000000000000000 R14: 00ffffffabea6920 R15: 0000000000000001 FS: 00007ff2b234d880(0000) GS:ffff88086ed00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000009 CR3: 0000000035c1e000 CR4: 0000000000360670 Stack: ffff88084e001600 ffffffffab72d1d7 ffff880830f18500 ffff880035c47aaf ffff880035c47a94 00000000000001c0 00000000ffffffff b0f4001fc4815eea 000000000000001c ffff880830f18500 0000000000000000 ffff880035c47d30 Call Trace: [<ffffffffab72d1d7>] ? __alloc_skb+0x87/0x1f0 [<ffffffffab782cb6>] ip_generic_getfrag+0x56/0xe0 [<ffffffffab7abc0f>] raw_getfrag+0xaf/0x100 [<ffffffffab78450a>] __ip_append_data.isra.45+0x98a/0xb90 [<ffffffffab7abb60>] ? raw_recvmsg+0x1c0/0x1c0 [<ffffffffab7abb60>] ? raw_recvmsg+0x1c0/0x1c0 [<ffffffffab78478a>] ip_append_data.part.46+0x7a/0xe0 [<ffffffffab785474>] ip_append_data+0x34/0x40 [<ffffffffab7ac8a4>] raw_sendmsg+0x724/0xc00 [<ffffffffab3a4ea0>] ? aa_sk_perm+0x70/0x210 [<ffffffffab3a5761>] ? aa_sock_msg_perm+0x61/0x150 [<ffffffffab7bc91b>] inet_sendmsg+0x6b/0xa0 [<ffffffffab723b5e>] sock_sendmsg+0x3e/0x50 [<ffffffffab724151>] SYSC_sendto+0x101/0x190 [<ffffffffab729fd0>] ? sock_setsockopt+0x180/0x830 [<ffffffffab397072>] ? apparmor_socket_setsockopt+0x22/0x30 [<ffffffffab724c7e>] SyS_sendto+0xe/0x10 [<ffffffffab84df9f>] entry_SYSCALL_64_fastpath+0x1c/0x93 Code: f3 48 0f 47 de 48 85 db 0f 84 8b 01 00 00 8b 02 49 89 f9 49 89 cc 4c 8b 71 08 89 45 c4 8b 01 a8 04 0f 85 79 01 00 00 4c 8b 79 18 <4d> 8b 6f 08 4d 29 f5 49 39 dd 4c 0f 47 eb a8 02 0f 85 36 02 00 RIP [<ffffffffab413ad5>] csum_and_copy_from_iter+0x55/0x4c0 RSP <ffff880035c47a18> CR2: 0000000000000009 ---[ end trace bdd9157c94a456b6 ]--- The trigger is when I start an artful lxd container and it tries to get an IPv4/IPv6. Oddly enough, the same thing works perfectly for my xenial container. My lxd-bridge has dnsmasq contained by Apparmor which is non standard but always worked flawlessly. I can trigger the bug 100% of the time so validating any tentative fix should be easy. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-113-generic 4.4.0-113.136 ProcVersionSignature: Ubuntu 4.4.0-112.135-generic 4.4.98 Uname: Linux 4.4.0-112-generic x86_64 NonfreeKernelModules: zfs zunicode zcommon znvpair zavl ApportVersion: 2.20.1-0ubuntu2.15 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: simon 7244 F.... pulseaudio CurrentDesktop: Unity CurrentDmesg: Error: command ['dmesg'] failed with exit code 1: dmesg: read kernel buffer failed: Operation not permitted Date: Sat Feb 10 16:45:26 2018 HibernationDevice: RESUME=/dev/mapper/nvme0n1p3_crypt InstallationDate: Installed on 2016-12-06 (431 days ago) InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Beta amd64 (20161206) MachineType: System76 Lemur ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-112-generic.efi.signed root=UUID=49432620-38ed-44bd-912a-7bc51eec3a35 ro quiet splash possible_cpus=4 nmi_watchdog=0 kaslr vsyscall=none vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-112-generic N/A linux-backports-modules-4.4.0-112-generic N/A linux-firmware 1.157.16 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 02/17/2017 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 5.12 dmi.board.asset.tag: Tag 12345 dmi.board.name: Lemur dmi.board.vendor: System76 dmi.board.version: lemu7 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: System76 dmi.chassis.version: N/A dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr5.12:bd02/17/2017:svnSystem76:pnLemur:pvrlemu7:rvnSystem76:rnLemur:rvrlemu7:cvnSystem76:ct10:cvrN/A: dmi.product.name: Lemur dmi.product.version: lemu7 dmi.sys.vendor: System76 + --- + ApportVersion: 2.20.1-0ubuntu2.15 + Architecture: amd64 + AudioDevicesInUse: + USER PID ACCESS COMMAND + /dev/snd/controlC0: simon 7244 F.... pulseaudio + CurrentDesktop: Unity + CurrentDmesg: Error: command ['dmesg'] failed with exit code 1: dmesg: read kernel buffer failed: Operation not permitted + DistroRelease: Ubuntu 16.04 + HibernationDevice: RESUME=/dev/mapper/nvme0n1p3_crypt + InstallationDate: Installed on 2016-12-06 (431 days ago) + InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Beta amd64 (20161206) + MachineType: System76 Lemur + NonfreeKernelModules: zfs zunicode zcommon znvpair zavl + Package: linux (not installed) + ProcFB: 0 inteldrmfb + ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-112-generic.efi.signed root=UUID=49432620-38ed-44bd-912a-7bc51eec3a35 ro quiet splash possible_cpus=4 nmi_watchdog=0 kaslr vsyscall=none vt.handoff=7 + ProcVersionSignature: Ubuntu 4.4.0-112.135-generic 4.4.98 + RelatedPackageVersions: + linux-restricted-modules-4.4.0-112-generic N/A + linux-backports-modules-4.4.0-112-generic N/A + linux-firmware 1.157.16 + RfKill: Error: [Errno 2] No such file or directory + Tags: xenial + Uname: Linux 4.4.0-112-generic x86_64 + UpgradeStatus: No upgrade log present (probably fresh install) + UserGroups: adm cdrom dip libvirtd lpadmin lxd plugdev sambashare sudo wireshark + _MarkForUpload: True + dmi.bios.date: 02/17/2017 + dmi.bios.vendor: American Megatrends Inc. + dmi.bios.version: 5.12 + dmi.board.asset.tag: Tag 12345 + dmi.board.name: Lemur + dmi.board.vendor: System76 + dmi.board.version: lemu7 + dmi.chassis.asset.tag: No Asset Tag + dmi.chassis.type: 10 + dmi.chassis.vendor: System76 + dmi.chassis.version: N/A + dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr5.12:bd02/17/2017:svnSystem76:pnLemur:pvrlemu7:rvnSystem76:rnLemur:rvrlemu7:cvnSystem76:ct10:cvrN/A: + dmi.product.name: Lemur + dmi.product.version: lemu7 + dmi.sys.vendor: System76 ** Attachment added: "AlsaInfo.txt" https://bugs.launchpad.net/bugs/1748671/+attachment/5052837/+files/AlsaInfo.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1748671 Title: BUG: unable to handle kernel NULL pointer dereference at 0000000000000009 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1748671/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
