Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.13 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.13-rc4 ** Changed in: linux (Ubuntu) Importance: Undecided => High ** Tags added: kernel-key ** Also affects: linux (Ubuntu Artful) Importance: High Status: Confirmed ** Changed in: linux (Ubuntu Artful) Status: Confirmed => Triaged -- 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/1711009 Title: jfs filesystem is crashy, multiple panic and I/O errors Status in linux package in Ubuntu: Triaged Status in linux source package in Artful: Triaged Bug description: Loading initial ramdisk ... OF stdout device is: /vdevice/vty@71000000 Preparing to boot Linux version 4.11.0-13-generic (buildd@bos01-ppc64el-022) (gcc version 6.4.0 20170724 (Ubuntu 6.4.0-2ubuntu1) ) #19-Ubuntu SMP Thu Aug 3 15:11:49 UTC 2017 (Ubuntu 4.11.0-13.19-generic 4.11.12) Detected machine type: 0000000000000101 command line: BOOT_IMAGE=/boot/vmlinux-4.11.0-13-generic root=UUID=8c6162e8-9bb1-4171-a901-30e001222a14 ro splash quiet Max number of cores passed to firmware: 2048 (NR_CPUS = 2048) Calling ibm,client-architecture-support... done memory layout at init: memory_limit : 0000000000000000 (16 MB aligned) alloc_bottom : 0000000007620000 alloc_top : 0000000030000000 alloc_top_hi : 0000000780000000 rmo_top : 0000000030000000 ram_top : 0000000780000000 instantiating rtas at 0x000000002fff0000... done prom_hold_cpus: skipped copying OF device tree... Building dt strings... Building dt structure... Device tree strings 0x0000000007630000 -> 0x00000000076309e6 Device tree struct 0x0000000007640000 -> 0x0000000007650000 Quiescing Open Firmware ... Booting Linux via __start() @ 0x0000000002000000 ... -> smp_release_cpus() spinning_secondaries = 7 <- smp_release_cpus() Linux ppc64le Got multiple instances of panics, on artful: [ 11.772333] ERROR: (device dm-3): dtSearch [jfs]: stack overrun! [ 11.772333] [ 11.772384] bn = 0, index = 0 [ 11.772408] bn = 4307af, index = 0 [ 11.772432] bn = 0, index = 0 [ 11.772456] bn = 4307af, index = 0 [ 11.772493] bn = 0, index = 0 [ 11.772537] bn = 4307af, index = 0 [ 11.772573] bn = 0, index = 0 [ 11.772599] bn = c00000077b994800, index = 0 /sbin/init: error while loading shared libraries: liblz4.so.1: cannot open shared object file: Input/output error [ 11.772964] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00007f00 [ 11.772964] [ 11.773043] CPU: 2 PID: 1 Comm: init Not tainted 4.11.0-13-generic #19-Ubuntu [ 11.773102] Call Trace: [ 11.773167] [c00000077e10bc30] [c000000000b831bc] dump_stack+0xb0/0xf0 (unreliable) [ 11.773243] [c00000077e10bc70] [c000000000b7fbc8] panic+0x144/0x318 [ 11.773311] [c00000077e10bd00] [c0000000000ea5b8] do_exit+0xc98/0xca0 [ 11.773373] [c00000077e10bdd0] [c0000000000ea690] do_group_exit+0x60/0x100 [ 11.773424] [c00000077e10be10] [c0000000000ea754] SyS_exit_group+0x24/0x30 [ 11.773470] [c00000077e10be30] [c00000000000b184] system_call+0x38/0xe0 [ 11.775434] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x00007f00 [ 11.775434] And also: [ 12.338435] Unable to handle kernel paging request for data at address 0x00000000 [ 12.338754] Faulting instruction address: 0xd0000000043be02c [ 12.338951] Oops: Kernel access of bad area, sig: 11 [#1] [ 12.338998] SMP NR_CPUS=2048 [ 12.338999] NUMA [ 12.339053] pSeries [ 12.339166] Modules linked in: ip_tables x_tables autofs4 jfs dm_service_time ibmveth ibmvscsi crc32c_vpmsum scsi_dh_emc scsi_dh_rdac scsi_dh_alua dm_multipath [ 12.339305] CPU: 2 PID: 2135 Comm: tty Not tainted 4.11.0-13-generic #19-Ubuntu [ 12.339441] task: c000000005562c00 task.stack: c000000006f78000 [ 12.339512] NIP: d0000000043be02c LR: d0000000043bdfbc CTR: c0000000001458f0 [ 12.339614] REGS: c000000006f7b4b0 TRAP: 0300 Not tainted (4.11.0-13-generic) [ 12.339707] MSR: 800000000280b033 <SF,VEC,VSX,EE,FP,ME,IR,DR,RI,LE> [ 12.339714] CR: 44008244 XER: 00000000 [ 12.339822] CFAR: 00003fff9aa23f14 DAR: 0000000000000000 DSISR: 40000000 SOFTE: 1 [ 12.339822] GPR00: d0000000043bdfbc c000000006f7b730 d0000000043d8c90 c000000778e765f8 [ 12.339822] GPR04: d0000000043cf770 d0000000043d2b58 00000000000005f1 0000000000000000 [ 12.339822] GPR08: 0000000000000000 003ffff80000102d 0000000000100002 d0000000043ca6e0 [ 12.339822] GPR12: c0000000001458f0 c00000000fb81200 0000000000000000 0000000000000000 [ 12.339822] GPR16: c00000077b8c81d8 c00000077b8c80c8 c000000778e91200 c00000077b8c8300 [ 12.339822] GPR20: c000000006f7ba30 c000000778e911fe c000000778c38800 c000000006f7b950 [ 12.339822] GPR24: 0000000000100002 0000000000100002 0000000000000000 d0000000043d2b38 [ 12.339822] GPR28: 0000000000001000 f000000001ddf440 c00000076b096480 c000000778e765b8 [ 12.340436] NIP [d0000000043be02c] __get_metapage+0x204/0x6b0 [jfs] [ 12.340541] LR [d0000000043bdfbc] __get_metapage+0x194/0x6b0 [jfs] [ 12.340585] Call Trace: [ 12.340608] [c000000006f7b730] [d0000000043bdf78] __get_metapage+0x150/0x6b0 [jfs] (unreliable) [ 12.340671] [c000000006f7b810] [d0000000043b9210] dtSearch+0x4d8/0xa20 [jfs] [ 12.340731] [c000000006f7b930] [d0000000043a3a88] jfs_lookup+0x80/0x100 [jfs] [ 12.340789] [c000000006f7ba60] [c0000000003683c0] lookup_slow+0xe0/0x240 [ 12.340840] [c000000006f7bae0] [c00000000036ccb8] walk_component+0x268/0x3f0 [ 12.340896] [c000000006f7bb60] [c00000000036d018] link_path_walk+0x1d8/0x5c0 [ 12.340950] [c000000006f7bc00] [c00000000036f19c] path_openat+0xbc/0x3b0 [ 12.340997] [c000000006f7bc80] [c000000000370d8c] do_filp_open+0xec/0x160 [ 12.341042] [c000000006f7bdb0] [c000000000355cdc] do_sys_open+0x1cc/0x380 [ 12.341087] [c000000006f7be30] [c00000000000b184] system_call+0x38/0xe0 [ 12.341130] Instruction dump: [ 12.341161] 7fc9f214 39200001 fbdf0030 f93f0028 e93d0000 712a1000 41820424 ebdd0030 [ 12.341218] 41920034 e8fd0008 811e0000 e95f0038 <e8c70000> 38e80001 81060090 90fe0000 [ 12.341281] ---[ end trace f65cb3ebef53fce5 ]--- [ 12.343113] [ 12.408425] systemd-journald[2059]: Received request to flush runtime journal from PID 1 [ 12.447465] Adding 1670336k swap on /swapfile. Priority:-1 extents:1 across:1670336k FS [ 12.494156] crypto_register_alg 'aes' = 0 [ 12.495040] crypto_register_alg 'cbc(aes)' = 0 [ 12.495535] crypto_register_alg 'ctr(aes)' = 0 [ 12.496075] crypto_register_alg 'xts(aes)' = 0 [ 13.210945] ------------[ cut here ]------------ [ 13.211085] kernel BUG at /build/linux-OXomHO/linux-4.11.0/arch/powerpc/lib/locks.c:34! [ 13.211421] Oops: Exception in kernel mode, sig: 5 [#2] [ 13.211475] SMP NR_CPUS=2048 [ 13.211475] NUMA [ 13.211517] pSeries [ 13.211794] Modules linked in: vmx_crypto ip_tables x_tables autofs4 jfs dm_service_time ibmveth ibmvscsi crc32c_vpmsum scsi_dh_emc scsi_dh_rdac scsi_dh_alua dm_multipath The crashes are easily reproducible in a ppc64el when installing artful from the latest mini.iso. As soon as I manage to boot to a proper command-line I'll try to run apport-collect. 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