You can triggered a general protection fault by running the ubuntu_docker_smoke_test, the test passed with older Eoan kernel in -updates, but failed with this one in proposed.
[ 101.715152] general protection fault: 0000 [#1] SMP PTI [ 101.717403] CPU: 1 PID: 1236 Comm: dockerd Not tainted 5.3.0-52-generic #46-Ubuntu [ 101.720424] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014 [ 101.723856] RIP: 0010:ovl_open_realfile+0x4a/0x150 [overlay] [ 101.725826] Code: 44 8b 6f 40 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 49 8b 7e 28 41 81 cd 00 00 04 04 e8 cd d4 ff ff 49 89 c7 48 8b 45 c8 <48> 8b 40 68 48 81 78 60 62 6a 65 6a 0f 84 a6 00 00 00 65 48 8b 04 [ 101.731311] RSP: 0018:ffffaa28406afc08 EFLAGS: 00010202 [ 101.732773] RAX: 044555892ac42800 RBX: ffff9af67a149ea8 RCX: 0000000000000001 [ 101.734759] RDX: 0000000000008000 RSI: ffff9af67a149ea8 RDI: ffff9af67b3d9000 [ 101.736866] RBP: ffffaa28406afc50 R08: ffff9af67b031240 R09: 0000000000000000 [ 101.738854] R10: ffff9af67a7d6900 R11: 0000000000000000 R12: ffff9af6799a1d00 [ 101.740883] R13: 0000000004048001 R14: ffff9af67a1a4818 R15: ffff9af67b031240 [ 101.742902] FS: 00007f58a57fa700(0000) GS:ffff9af67db00000(0000) knlGS:0000000000000000 [ 101.745194] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 101.746798] CR2: 0000000001178b78 CR3: 000000007b060000 CR4: 00000000000006e0 [ 101.748817] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 101.750798] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 101.752804] Call Trace: [ 101.753502] ? ovl_llseek+0x120/0x120 [overlay] [ 101.754770] ovl_open+0x57/0x90 [overlay] [ 101.755951] do_dentry_open+0x143/0x3a0 [ 101.757013] vfs_open+0x2d/0x30 [ 101.757949] do_last+0x194/0x8f0 [ 101.758843] path_openat+0x8d/0x270 [ 101.759908] ? __switch_to_asm+0x40/0x70 [ 101.760984] ? __switch_to_asm+0x34/0x70 [ 101.762099] do_filp_open+0x91/0x100 [ 101.763088] ? __alloc_fd+0x46/0x150 [ 101.764171] do_sys_open+0x17e/0x290 [ 101.765168] __x64_sys_openat+0x20/0x30 [ 101.766297] do_syscall_64+0x5a/0x130 [ 101.767512] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 101.768932] RIP: 0033:0x56465af612ba [ 101.769922] Code: e8 8b 3d f8 ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 4c 8b 54 24 28 4c 8b 44 24 30 4c 8b 4c 24 38 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 40 ff ff ff ff 48 c7 44 24 48 [ 101.775167] RSP: 002b:000000c0009567a0 EFLAGS: 00000202 ORIG_RAX: 0000000000000101 [ 101.777440] RAX: ffffffffffffffda RBX: 000000c00005e500 RCX: 000056465af612ba [ 101.779553] RDX: 0000000000080241 RSI: 000000c000814e00 RDI: ffffffffffffff9c [ 101.781538] RBP: 000000c000956818 R08: 0000000000000000 R09: 0000000000000000 [ 101.783650] R10: 00000000000001a4 R11: 0000000000000202 R12: ffffffffffffffff [ 101.785789] R13: 0000000000000039 R14: 0000000000000038 R15: 0000000000000080 [ 101.787887] Modules linked in: xt_conntrack xt_MASQUERADE nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo xt_addrtype iptable_filter iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 bpfilter br_netfilter bridge stp llc aufs overlay dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua kvm_intel kvm irqbypass joydev input_leds serio_raw mac_hid qemu_fw_cfg sch_fq_codel ip_tables x_tables autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear cirrus drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm virtio_net net_failover psmouse failover virtio_blk i2c_piix4 pata_acpi floppy [ 101.808815] ---[ end trace ef14f7485e54a2a6 ]--- [ 101.811218] RIP: 0010:ovl_open_realfile+0x4a/0x150 [overlay] [ 101.814009] Code: 44 8b 6f 40 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 49 8b 7e 28 41 81 cd 00 00 04 04 e8 cd d4 ff ff 49 89 c7 48 8b 45 c8 <48> 8b 40 68 48 81 78 60 62 6a 65 6a 0f 84 a6 00 00 00 65 48 8b 04 [ 101.821593] RSP: 0018:ffffaa28406afc08 EFLAGS: 00010202 [ 101.823778] RAX: 044555892ac42800 RBX: ffff9af67a149ea8 RCX: 0000000000000001 [ 101.826528] RDX: 0000000000008000 RSI: ffff9af67a149ea8 RDI: ffff9af67b3d9000 [ 101.829350] RBP: ffffaa28406afc50 R08: ffff9af67b031240 R09: 0000000000000000 [ 101.831910] R10: ffff9af67a7d6900 R11: 0000000000000000 R12: ffff9af6799a1d00 [ 101.834825] R13: 0000000004048001 R14: ffff9af67a1a4818 R15: ffff9af67b031240 [ 101.837606] FS: 00007f58a57fa700(0000) GS:ffff9af67db00000(0000) knlGS:0000000000000000 [ 101.840678] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 101.842914] CR2: 0000000001178b78 CR3: 000000007b060000 CR4: 00000000000006e0 [ 101.845479] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 101.848015] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 -- 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/1876645 Title: Unable to handle kernel pointer dereference in virtual kernel address space on Eoan Status in ubuntu-kernel-tests: New Status in linux package in Ubuntu: Confirmed Bug description: Issue spotted on Eoan zVM / LPAR It looks like this happens when running the ubunut_fan_smoke_test (jenkins job hang with this one) [ 1225.137764] docker0: port 1(veth2fda0c6) entered blocking state [ 1225.137767] docker0: port 1(veth2fda0c6) entered disabled state [ 1225.138023] device veth2fda0c6 entered promiscuous mode [ 1225.148523] Unable to handle kernel pointer dereference in virtual kernel address space [ 1225.148529] Failing address: 6f766c5f646f5000 TEID: 6f766c5f646f5803 [ 1225.148531] Fault in home space mode while using kernel ASCE. [ 1225.148533] AS:000000070d94c007 R3:0000000000000024 [ 1225.148575] Oops: 0038 ilc:3 [#1] SMP [ 1225.148578] Modules linked in: veth xt_nat vxlan ip6_udp_tunnel udp_tunnel nf_conntrack_netlink xfrm_user xfrm_algo xt_addrtype br_netfilter unix_diag sctp cuse vhost_net tap vhost_vsock vmw_vsock_virtio_transport_common vhost vsock dccp_ipv4 dccp algif_rng aegis128 aegis128l aegis256 morus1280 morus640 algif_aead anubis fcrypt khazad seed sm4_generic tea md4 michael_mic nhpoly1305 poly1305_generic rmd128 rmd160 rmd256 rmd320 sha3_generic sm3_generic streebog_generic tgr192 wp512 xxhash_generic algif_hash blowfish_generic blowfish_common cast5_generic salsa20_generic chacha_generic camellia_generic cast6_generic cast_common serpent_generic twofish_generic twofish_common algif_skcipher af_alg xt_conntrack ipt_REJECT nf_reject_ipv4 ip6table_mangle ip6table_nat nf_tables nfnetlink ip6table_filter ip6_tables iptable_mangle xt_CHECKSUM iptable_nat xt_MASQUERADE xt_tcpudp bridge iptable_filter bpfilter aufs overlay 8021q garp stp mrp llc openvswitch nsh nf_conncount nf_nat nf_conntrack [ 1225.148622] nf_defrag_ipv6 nf_defrag_ipv4 binfmt_misc zfs(PO) zunicode(PO) zavl(PO) icp(PO) zlua(PO) zcommon(PO) znvpair(PO) spl(O) genwqe_card crc_itu_t chsc_sch eadm_sch ctcm fsm vfio_ccw vfio_mdev mdev vfio_iommu_type1 vfio sch_fq_codel nfsd auth_rpcgss nfs_acl lockd grace sunrpc ip_tables x_tables btrfs zstd_compress zlib_deflate raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 linear dm_service_time mlx4_ib ib_uverbs mlx4_en ptp ib_core pps_core pkey zcrypt crc32_vx_s390 ghash_s390 prng aes_s390 des_s390 qeth_l2 des_generic sha512_s390 sha256_s390 sha1_s390 sha_common mlx4_core zfcp scsi_transport_fc qeth qdio ccwgroup dasd_eckd_mod dasd_mod scsi_dh_emc scsi_dh_rdac scsi_dh_alua dm_multipath [ 1225.148711] CPU: 4 PID: 161930 Comm: dockerd Tainted: P O 5.3.0-52-generic #46-Ubuntu [ 1225.148714] Hardware name: IBM 2964 N63 400 (LPAR) [ 1225.148716] Krnl PSW : 0704d00180000000 000003ff808e972a (ovl_open_realfile+0x4a/0x148 [overlay]) [ 1225.148734] R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:1 PM:0 RI:0 EA:3 [ 1225.148736] Krnl GPRS: 0000000000000064 6f766c5f646f5f6d 00000007a14ac300 00000003a5df6600 [ 1225.148738] 0000000000008000 0000000000000001 0000000300000000 0000000372e45278 [ 1225.148740] 000003ff808ea508 0000000304048000 00000005c7f32b68 000000064a2ab900 [ 1225.148742] 00000003a5df6600 000003ff808f31d8 000003ff808e971a 000003e009c0faf8 [ 1225.148749] Krnl Code: 000003ff808e971a: a59a0404 oilh %r9,1028 000003ff808e971e: e310f0c00004 lg %r1,192(%r15) #000003ff808e9724: e31010680004 lg %r1,104(%r1) >000003ff808e972a: e31010600004 lg %r1,96(%r1) 000003ff808e9730: b9040082 lgr %r8,%r2 000003ff808e9734: c21c6a656a62 cgfi %r1,1785031266 000003ff808e973a: b9140039 lgfr %r3,%r9 000003ff808e973e: e31003400004 lg %r1,832 [ 1225.148766] Call Trace: [ 1225.148769] ([<0000000000000000>] 0x0) [ 1225.148774] [<000003ff808ea582>] ovl_open+0x7a/0xc0 [overlay] [ 1225.148780] [<000000070cbf2c04>] do_dentry_open+0x1fc/0x3b0 [ 1225.148784] [<000000070cc0afd2>] do_last+0x1ba/0x970 [ 1225.148786] [<000000070cc0b80e>] path_openat+0x86/0x2b8 [ 1225.148788] [<000000070cc0cea4>] do_filp_open+0x7c/0xf8 [ 1225.148791] [<000000070cbf4b5a>] do_sys_open+0x19a/0x2c8 [ 1225.148798] [<000000070d1ebca8>] system_call+0xdc/0x2c8 [ 1225.148800] Last Breaking-Event-Address: [ 1225.148802] [<000000070d1ed210>] __s390_indirect_jump_r14+0x0/0xc [ 1225.148805] ---[ end trace dc1913214325ab11 ]--- ProblemType: Bug DistroRelease: Ubuntu 19.10 Package: linux-image-5.3.0-52-generic 5.3.0-52.46 ProcVersionSignature: Ubuntu 5.3.0-52.46-generic 5.3.18 Uname: Linux 5.3.0-52-generic s390x NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code 2: ls: cannot access '/dev/snd/': No such file or directory AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay' ApportVersion: 2.20.11-0ubuntu8.8 Architecture: s390x ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord' CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found. Date: Sun May 3 21:51:21 2020 IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig' Lsusb: Error: command ['lsusb'] failed with exit code 1: PciMultimedia: ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: ProcKernelCmdLine: root=UUID=d15a5734-c073-4c9a-80ad-65a914214bb8 crashkernel=196M BOOT_IMAGE=0 RelatedPackageVersions: linux-restricted-modules-5.3.0-52-generic N/A linux-backports-modules-5.3.0-52-generic N/A linux-firmware 1.183.5 RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/1876645/+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
