crash 8.0.0++ Copyright (C) 2002-2021 Red Hat, Inc. Copyright (C) 2004, 2005, 2006, 2010 IBM Corporation Copyright (C) 1999-2006 Hewlett-Packard Co Copyright (C) 2005, 2006, 2011, 2012 Fujitsu Limited Copyright (C) 2006, 2007 VA Linux Systems Japan K.K. Copyright (C) 2005, 2011, 2020-2021 NEC Corporation Copyright (C) 1999, 2002, 2007 Silicon Graphics, Inc. Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc. Copyright (C) 2015, 2021 VMware, Inc. This program is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Enter "help copying" to see the conditions. This program has absolutely no warranty. Enter "help warranty" for details. NOTE: stdin: not a tty GNU gdb (GDB) 10.2 Copyright (C) 2021 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-pc-linux-gnu". Type "show configuration" for configuration details. Find the GDB manual and other documentation resources online at: . For help, type "help". Type "apropos word" to search for commands related to "word"... please wait... (gathering kmem slab cache data) please wait... (gathering module symbol data) please wait... (gathering task table data) please wait... (determining panic task) KERNEL: /tmp/crash-anaysis.rRhhW/vmlinux [TAINTED] DUMPFILE: /exports/testreports/68247/testresults/sanity1-zfs-rocky8.10_x86_64-rocky8.10_x86_64/oleg108-server-vmcore [PARTIAL DUMP] CPUS: 4 DATE: Wed Aug 19 23:57:51 EDT 2026 UPTIME: 02:16:16 LOAD AVERAGE: 1.41, 1.31, 1.11 TASKS: 397 NODENAME: oleg108-server.virtnet RELEASE: 4.18.0rh8.10-debug VERSION: #2 SMP Mon Jul 14 01:24:22 EDT 2025 MACHINE: x86_64 (2399 Mhz) MEMORY: 4.1 GB PANIC: "BUG: unable to handle kernel NULL pointer dereference at 0000000000000060" PID: 20426 COMMAND: "mdt00_002" TASK: ffff9c987d694f80 [THREAD_INFO: ffff9c987d694f80] CPU: 1 STATE: TASK_RUNNING (PANIC) Setting scroll off while initializing PyKdump /usr/local/crash/mpykdump.so: shared object loaded ./lustre.so: shared object loaded mod: cannot find or load object file for sha512_generic module mod: cannot find or load object file for sha512_ssse3 module mod: cannot find or load object file for dm_mod module mod: cannot find or load object file for dm_log module mod: cannot find or load object file for dm_region_hash module mod: cannot find or load object file for dm_mirror module mod: cannot find or load object file for libata module mod: cannot find or load object file for serio_raw module mod: cannot find or load object file for crc32_pclmul module mod: cannot find or load object file for pcspkr module mod: cannot find or load object file for intel_rapl_msr module mod: cannot find or load object file for ghash_clmulni_intel module mod: cannot find or load object file for dns_resolver module mod: cannot find or load object file for ata_piix module mod: cannot find or load object file for crc32c_intel module mod: cannot find or load object file for i2c_piix4 module mod: cannot find or load object file for ata_generic module mod: cannot find or load object file for crct10dif_pclmul module mod: cannot find or load object file for squashfs module mod: cannot find or load object file for sb_edac module mod: cannot find or load object file for rpcsec_gss_krb5 module mod: cannot find or load object file for rapl module mod: cannot find or load object file for intel_rapl_common module mod: cannot find or load object file for nfsv4 module mod: cannot find or load object file for auth_rpcgss module MODULE NAME BASE SIZE OBJECT FILE ffffffffc0797740 libcfs ffffffffc0777000 225280 /tmp/crash-anaysis.rRhhW/modules/libcfs.ko mod: cannot find or load object file for spl module mod: cannot find or load object file for zfs module ffffffffc11b93c0 lnet ffffffffc10de000 1490944 /tmp/crash-anaysis.rRhhW/modules/lnet.ko ffffffffc1274900 ksocklnd ffffffffc124b000 270336 /tmp/crash-anaysis.rRhhW/modules/ksocklnd.ko ffffffffc13cffc0 obdclass ffffffffc128e000 4374528 /tmp/crash-anaysis.rRhhW/modules/obdclass.ko ffffffffc1948080 ptlrpc ffffffffc16bb000 4182016 /tmp/crash-anaysis.rRhhW/modules/ptlrpc.ko ffffffffc1b07880 ptlrpc_gss ffffffffc1ab9000 524288 /tmp/crash-anaysis.rRhhW/modules/ptlrpc_gss.ko ffffffffc1b4cc80 fld ffffffffc1b3a000 126976 /tmp/crash-anaysis.rRhhW/modules/fld.ko ffffffffc1b6cac0 fid ffffffffc1b5a000 126976 /tmp/crash-anaysis.rRhhW/modules/fid.ko ffffffffc1b8c740 ec ffffffffc1b7a000 81920 /tmp/crash-anaysis.rRhhW/modules/ec.ko ffffffffc1bcc080 lmv ffffffffc1b8f000 372736 /tmp/crash-anaysis.rRhhW/modules/lmv.ko ffffffffc1c62e00 osc ffffffffc1beb000 729088 /tmp/crash-anaysis.rRhhW/modules/osc.ko ffffffffc1cf5780 lov ffffffffc1c9e000 548864 /tmp/crash-anaysis.rRhhW/modules/lov.ko ffffffffc1d6fb80 mdc ffffffffc1d25000 466944 /tmp/crash-anaysis.rRhhW/modules/mdc.ko ffffffffc1db4000 mgc ffffffffc1d98000 184320 /tmp/crash-anaysis.rRhhW/modules/mgc.ko ffffffffc1de75c0 obdecho ffffffffc1dc6000 225280 /tmp/crash-anaysis.rRhhW/modules/obdecho.ko ffffffffc1eb80c0 lfsck ffffffffc1dfe000 1077248 /tmp/crash-anaysis.rRhhW/modules/lfsck.ko ffffffffc1f86200 lquota ffffffffc1f06000 786432 /tmp/crash-anaysis.rRhhW/modules/lquota.ko ffffffffc2031ac0 osd_zfs ffffffffc1fc7000 655360 /tmp/crash-anaysis.rRhhW/modules/osd_zfs.ko ffffffffc20cb400 mgs ffffffffc2068000 626688 /tmp/crash-anaysis.rRhhW/modules/mgs.ko ffffffffc217d080 mdd ffffffffc2102000 745472 /tmp/crash-anaysis.rRhhW/modules/mdd.ko ffffffffc22c7880 mdt ffffffffc21b9000 1654784 /tmp/crash-anaysis.rRhhW/modules/mdt.ko ffffffffc23f8240 lod ffffffffc234e000 1048576 /tmp/crash-anaysis.rRhhW/modules/lod.ko ffffffffc24b1800 ofd ffffffffc244f000 610304 /tmp/crash-anaysis.rRhhW/modules/ofd.ko ffffffffc2540f80 osp ffffffffc24e5000 573440 /tmp/crash-anaysis.rRhhW/modules/osp.ko ffffffffc26a5340 lustre ffffffffc2572000 1904640 /tmp/crash-anaysis.rRhhW/modules/lustre.ko lustre_walk_cpus(0, 5, 1) cmd p (*cfs_trace_data[0])[0].tcd.tcd_cur_pages // p (*cfs_trace_data[0])[0].tcd.tcd_pages.next lustre_walk_trace_pages(0, 5, 0xffff9c986d3c8f48) lustre_walk_cpus(0, 5, 2) cmd p (*cfs_trace_data[0])[0].tcd.tcd_cur_daemon_pages // p (*cfs_trace_data[0])[0].tcd.tcd_daemon_pages.next lustre: Dumped 1285 debug pages from type 0 - CPU 0 lustre_walk_cpus(1, 5, 1) cmd p (*cfs_trace_data[0])[1].tcd.tcd_cur_pages // p (*cfs_trace_data[0])[1].tcd.tcd_pages.next lustre_walk_trace_pages(1, 5, 0xffff9c98749db288) lustre_walk_cpus(1, 5, 2) cmd p (*cfs_trace_data[0])[1].tcd.tcd_cur_daemon_pages // p (*cfs_trace_data[0])[1].tcd.tcd_daemon_pages.next lustre: Dumped 1368 debug pages from type 0 - CPU 1 lustre_walk_cpus(2, 5, 1) cmd p (*cfs_trace_data[0])[2].tcd.tcd_cur_pages // p (*cfs_trace_data[0])[2].tcd.tcd_pages.next lustre_walk_trace_pages(2, 5, 0xffff9c987ba5ce08) lustre_walk_cpus(2, 5, 2) cmd p (*cfs_trace_data[0])[2].tcd.tcd_cur_daemon_pages // p (*cfs_trace_data[0])[2].tcd.tcd_daemon_pages.next lustre: Dumped 1401 debug pages from type 0 - CPU 2 lustre_walk_cpus(3, 5, 1) cmd p (*cfs_trace_data[0])[3].tcd.tcd_cur_pages // p (*cfs_trace_data[0])[3].tcd.tcd_pages.next lustre_walk_trace_pages(3, 5, 0xffff9c986d02fce8) lustre_walk_cpus(3, 5, 2) cmd p (*cfs_trace_data[0])[3].tcd.tcd_cur_daemon_pages // p (*cfs_trace_data[0])[3].tcd.tcd_daemon_pages.next lustre: Dumped 1445 debug pages from type 0 - CPU 3 lustre_walk_cpus(0, 5, 1) cmd p (*cfs_trace_data[1])[0].tcd.tcd_cur_pages // p (*cfs_trace_data[1])[0].tcd.tcd_pages.next lustre_walk_trace_pages(0, 5, 0xffff9c984740d388) lustre_walk_cpus(0, 5, 2) cmd p (*cfs_trace_data[1])[0].tcd.tcd_cur_daemon_pages // p (*cfs_trace_data[1])[0].tcd.tcd_daemon_pages.next lustre: Dumped 128 debug pages from type 1 - CPU 0 lustre_walk_cpus(1, 5, 1) cmd p (*cfs_trace_data[1])[1].tcd.tcd_cur_pages // p (*cfs_trace_data[1])[1].tcd.tcd_pages.next lustre_walk_trace_pages(1, 5, 0xffff9c987b768068) lustre_walk_cpus(1, 5, 2) cmd p (*cfs_trace_data[1])[1].tcd.tcd_cur_daemon_pages // p (*cfs_trace_data[1])[1].tcd.tcd_daemon_pages.next lustre: Dumped 130 debug pages from type 1 - CPU 1 lustre_walk_cpus(2, 5, 1) cmd p (*cfs_trace_data[1])[2].tcd.tcd_cur_pages // p (*cfs_trace_data[1])[2].tcd.tcd_pages.next lustre_walk_trace_pages(2, 5, 0xffff9c9851f68a48) lustre_walk_cpus(2, 5, 2) cmd p (*cfs_trace_data[1])[2].tcd.tcd_cur_daemon_pages // p (*cfs_trace_data[1])[2].tcd.tcd_daemon_pages.next lustre: Dumped 129 debug pages from type 1 - CPU 2 lustre_walk_cpus(3, 5, 1) cmd p (*cfs_trace_data[1])[3].tcd.tcd_cur_pages // p (*cfs_trace_data[1])[3].tcd.tcd_pages.next lustre_walk_trace_pages(3, 5, 0xffff9c98551775c8) lustre_walk_cpus(3, 5, 2) cmd p (*cfs_trace_data[1])[3].tcd.tcd_cur_daemon_pages // p (*cfs_trace_data[1])[3].tcd.tcd_daemon_pages.next lustre: Dumped 135 debug pages from type 1 - CPU 3 lustre_walk_cpus(0, 5, 1) cmd p (*cfs_trace_data[2])[0].tcd.tcd_cur_pages // p (*cfs_trace_data[2])[0].tcd.tcd_pages.next lustre_walk_cpus(0, 5, 2) cmd p (*cfs_trace_data[2])[0].tcd.tcd_cur_daemon_pages // p (*cfs_trace_data[2])[0].tcd.tcd_daemon_pages.next lustre: Dumped 0 debug pages from type 2 - CPU 0 lustre_walk_cpus(1, 5, 1) cmd p (*cfs_trace_data[2])[1].tcd.tcd_cur_pages // p (*cfs_trace_data[2])[1].tcd.tcd_pages.next lustre_walk_cpus(1, 5, 2) cmd p (*cfs_trace_data[2])[1].tcd.tcd_cur_daemon_pages // p (*cfs_trace_data[2])[1].tcd.tcd_daemon_pages.next lustre: Dumped 0 debug pages from type 2 - CPU 1 lustre_walk_cpus(2, 5, 1) cmd p (*cfs_trace_data[2])[2].tcd.tcd_cur_pages // p (*cfs_trace_data[2])[2].tcd.tcd_pages.next lustre_walk_cpus(2, 5, 2) cmd p (*cfs_trace_data[2])[2].tcd.tcd_cur_daemon_pages // p (*cfs_trace_data[2])[2].tcd.tcd_daemon_pages.next lustre: Dumped 0 debug pages from type 2 - CPU 2 lustre_walk_cpus(3, 5, 1) cmd p (*cfs_trace_data[2])[3].tcd.tcd_cur_pages // p (*cfs_trace_data[2])[3].tcd.tcd_pages.next lustre_walk_cpus(3, 5, 2) cmd p (*cfs_trace_data[2])[3].tcd.tcd_cur_daemon_pages // p (*cfs_trace_data[2])[3].tcd.tcd_daemon_pages.next lustre: Dumped 0 debug pages from type 2 - CPU 3 lustre: Dumped 6021 total debug pages from 4 CPUs to /tmp/crash-anaysis.rRhhW/lustre.bin