Public bug reported: During autopkgtest testing the sysinfo stressor failed, causing the kernel to oops.
16:20:34 DEBUG| [stdout] sysinfo STARTING 16:20:39 DEBUG| [stdout] sysinfo RETURNED 0 16:20:39 DEBUG| [stdout] sysinfo FAILED (kernel oopsed) 16:20:39 DEBUG| [stdout] [ 6521.203448] kernel tried to execute exec-protected page (c0000000c25ffce0) - exploit attempt? (uid: 0) 16:20:39 DEBUG| [stdout] [ 6521.207260] BUG: Unable to handle kernel instruction fetch 16:20:39 DEBUG| [stdout] [ 6521.207307] Faulting instruction address: 0xc0000000c25ffce0 16:20:39 DEBUG| [stdout] [ 6521.207367] Oops: Kernel access of bad area, sig: 11 [#1] 16:20:39 DEBUG| [stdout] [ 6521.207416] LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries 16:20:39 DEBUG| [stdout] [ 6521.207481] Modules linked in: unix_diag sctp vhost_vsock vmw_vsock_virtio_transport_common vsock zfs(PO) zunicode(PO) zavl(PO) icp(PO) zlua(PO) userio zcommon(PO) znvpair(PO) cuse spl(O) kvm_pr kvm snd_seq snd_seq_device snd_timer snd soundcore hci_vhci bluetooth ecdh_generic ecc uhid hid vhost_net vhost tap atm algif_rng aegis128 algif_aead anubis fcrypt khazad seed sm4_generic tea crc32_generic md4 michael_mic nhpoly1305 poly1305_generic rmd128 rmd160 rmd256 rmd320 sha3_generic sm3_generic streebog_generic tgr192 wp512 xxhash_generic blowfish_generic blowfish_common cast5_generic des_generic libdes salsa20_generic chacha_generic camellia_generic cast6_generic cast_common serpent_generic twofish_generic twofish_common algif_skcipher aufs sch_etf sch_fq dccp_ipv6 dccp_ipv4 dccp ip6table_nat ip6_tables iptable_nat xt_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 algif_hash af_alg ip_vti ip6_vti fou6 sit ipip tunnel4 fou geneve act_mirred cls_basic esp6 authenc echainiv 16:20:39 DEBUG| [stdout] [ 6521.208045] iptable_filter xt_policy veth esp4_offload esp4 xfrm_user xfrm_algo macsec vxlan ip6_udp_tunnel udp_tunnel vrf 8021q garp mrp bridge stp llc ip6_gre ip6_tunnel tunnel6 ip_gre ip_tunnel gre cls_u32 sch_htb dummy tls binfmt_misc af_packet_diag tcp_diag udp_diag raw_diag inet_diag iptable_mangle xt_TCPMSS xt_tcpudp bpfilter dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua vmx_crypto crct10dif_vpmsum sch_fq_codel ip_tables x_tables autofs4 btrfs xor zstd_compress raid6_pq libcrc32c crc32c_vpmsum virtio_blk virtio_net net_failover failover [last unloaded: trace_printk] 16:20:39 DEBUG| [stdout] [ 6521.209360] CPU: 1 PID: 2647099 Comm: fuse_mnt Tainted: P OE 5.4.0-9-generic #12-Ubuntu 16:20:39 DEBUG| [stdout] [ 6521.209457] NIP: c0000000c25ffce0 LR: c00000000063f058 CTR: c0000000c25ffce0 16:20:39 DEBUG| [stdout] [ 6521.209528] REGS: c000000109703810 TRAP: 0400 Tainted: P OE (5.4.0-9-generic) 16:20:39 DEBUG| [stdout] [ 6521.209608] MSR: 8000000010009033 <SF,EE,ME,IR,DR,RI,LE> CR: 88002440 XER: 20000000 16:20:39 DEBUG| [stdout] [ 6521.209681] CFAR: c00000000063f054 IRQMASK: 0 16:20:39 DEBUG| [stdout] GPR00: c00000000063f034 c000000109703aa0 c000000001a4bb00 c00000007cef3000 16:20:39 DEBUG| [stdout] GPR04: c0000000c25ffc18 0000000000000000 0000000000000000 0000000000000000 16:20:39 DEBUG| [stdout] GPR08: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 16:20:39 DEBUG| [stdout] GPR12: c0000000c25ffce0 c00000003fffee00 000079b6987b4410 0000000000000000 16:20:39 DEBUG| [stdout] GPR16: 000079b698b30000 000079b6987b0320 000079b69771f240 000079b6987b4420 16:20:39 DEBUG| [stdout] GPR20: 0000000000000000 0000000000000000 000079b6880010a0 000079b698a4d3a0 16:20:39 DEBUG| [stdout] GPR24: c000000109d56cc0 c0000001fde0cd8c c0000000c25ffce0 c000000109d56ca0 16:20:39 DEBUG| [stdout] GPR28: c000000109d56cc0 0000000000000000 c00000007cef3000 c000000109d56c90 16:20:39 DEBUG| [stdout] [ 6521.210276] NIP [c0000000c25ffce0] 0xc0000000c25ffce0 16:20:39 DEBUG| [stdout] [ 6521.210355] LR [c00000000063f058] fuse_request_end+0x128/0x2f0 16:20:39 DEBUG| [stdout] [ 6521.210423] Call Trace: 16:20:39 DEBUG| [stdout] [ 6521.210448] [c000000109703aa0] [c00000000063f034] fuse_request_end+0x104/0x2f0 (unreliable) 16:20:39 DEBUG| [stdout] [ 6521.210520] [c000000109703af0] [c000000000642ebc] fuse_dev_do_write+0x2cc/0x5c0 16:20:39 DEBUG| [stdout] [ 6521.210591] [c000000109703b70] [c000000000643654] fuse_dev_write+0x74/0xd0 16:20:39 DEBUG| [stdout] [ 6521.210660] [c000000109703c00] [c0000000004707c0] do_iter_readv_writev+0x240/0x290 16:20:39 DEBUG| [stdout] [ 6521.210735] [c000000109703c70] [c0000000004730d8] do_iter_write+0xc8/0x280 16:20:39 DEBUG| [stdout] [ 6521.210794] [c000000109703cc0] [c0000000004733a0] vfs_writev+0xe0/0x180 16:20:39 DEBUG| [stdout] [ 6521.210854] [c000000109703dc0] [c0000000004734dc] do_writev+0x9c/0x1a0 16:20:39 DEBUG| [stdout] [ 6521.210915] [c000000109703e20] [c00000000000b278] system_call+0x5c/0x68 16:20:39 DEBUG| [stdout] [ 6521.210973] Instruction dump: 16:20:39 DEBUG| [stdout] [ 6521.211018] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX 16:20:39 DEBUG| [stdout] [ 6521.211089] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX 16:20:39 DEBUG| [stdout] [ 6521.211168] ---[ end trace 141e6d1cc5d48ea2 ]--- Full testing log: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac /autopkgtest-focal/focal/ppc64el/l/linux/20191218_163756_0e1f6@/log.gz ** Affects: linux (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1856900 Title: stress-ng sysinfo stressor fails on ppc64el with linux 5.4.0-9.12 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1856900/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
