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.Mm91f/vmlinux [TAINTED] DUMPFILE: /exports/testreports/68247/testresults/racer-zfs-rocky8.10_x86_64-rocky8.10_x86_64-retry1/oleg619-server-vmcore [PARTIAL DUMP] CPUS: 4 DATE: Wed Aug 19 21:52:11 EDT 2026 UPTIME: 00:08:04 LOAD AVERAGE: 13.86, 6.65, 2.76 TASKS: 410 NODENAME: oleg619-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: 11721 COMMAND: "mdt00_006" TASK: ffff89ee92060000 [THREAD_INFO: ffff89ee92060000] CPU: 2 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_region_hash module mod: cannot find or load object file for dm_log 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 ghash_clmulni_intel module mod: cannot find or load object file for crct10dif_pclmul 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 rapl module mod: cannot find or load object file for intel_rapl_msr module mod: cannot find or load object file for serio_raw 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 squashfs module mod: cannot find or load object file for dns_resolver 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 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 ffffffffc0640740 libcfs ffffffffc0620000 225280 /tmp/crash-anaysis.Mm91f/modules/libcfs.ko mod: cannot find or load object file for spl module mod: cannot find or load object file for zfs module ffffffffc10623c0 lnet ffffffffc0f87000 1490944 /tmp/crash-anaysis.Mm91f/modules/lnet.ko ffffffffc111d900 ksocklnd ffffffffc10f4000 270336 /tmp/crash-anaysis.Mm91f/modules/ksocklnd.ko ffffffffc1278fc0 obdclass ffffffffc1137000 4374528 /tmp/crash-anaysis.Mm91f/modules/obdclass.ko ffffffffc17f1080 ptlrpc ffffffffc1564000 4182016 /tmp/crash-anaysis.Mm91f/modules/ptlrpc.ko ffffffffc19b0880 ptlrpc_gss ffffffffc1962000 524288 /tmp/crash-anaysis.Mm91f/modules/ptlrpc_gss.ko ffffffffc19f5c80 fld ffffffffc19e3000 126976 /tmp/crash-anaysis.Mm91f/modules/fld.ko ffffffffc1a15ac0 fid ffffffffc1a03000 126976 /tmp/crash-anaysis.Mm91f/modules/fid.ko ffffffffc1a35740 ec ffffffffc1a23000 81920 /tmp/crash-anaysis.Mm91f/modules/ec.ko ffffffffc1a75080 lmv ffffffffc1a38000 372736 /tmp/crash-anaysis.Mm91f/modules/lmv.ko ffffffffc1b0be00 osc ffffffffc1a94000 729088 /tmp/crash-anaysis.Mm91f/modules/osc.ko ffffffffc1b9e780 lov ffffffffc1b47000 548864 /tmp/crash-anaysis.Mm91f/modules/lov.ko ffffffffc1c18b80 mdc ffffffffc1bce000 466944 /tmp/crash-anaysis.Mm91f/modules/mdc.ko ffffffffc1c5d000 mgc ffffffffc1c41000 184320 /tmp/crash-anaysis.Mm91f/modules/mgc.ko ffffffffc1c905c0 obdecho ffffffffc1c6f000 225280 /tmp/crash-anaysis.Mm91f/modules/obdecho.ko ffffffffc1d610c0 lfsck ffffffffc1ca7000 1077248 /tmp/crash-anaysis.Mm91f/modules/lfsck.ko ffffffffc1e2f200 lquota ffffffffc1daf000 786432 /tmp/crash-anaysis.Mm91f/modules/lquota.ko ffffffffc1edaac0 osd_zfs ffffffffc1e70000 655360 /tmp/crash-anaysis.Mm91f/modules/osd_zfs.ko ffffffffc1f74400 mgs ffffffffc1f11000 626688 /tmp/crash-anaysis.Mm91f/modules/mgs.ko ffffffffc2026080 mdd ffffffffc1fab000 745472 /tmp/crash-anaysis.Mm91f/modules/mdd.ko ffffffffc2170880 mdt ffffffffc2062000 1654784 /tmp/crash-anaysis.Mm91f/modules/mdt.ko ffffffffc22a1240 lod ffffffffc21f7000 1048576 /tmp/crash-anaysis.Mm91f/modules/lod.ko ffffffffc235a800 ofd ffffffffc22f8000 610304 /tmp/crash-anaysis.Mm91f/modules/ofd.ko ffffffffc23e9f80 osp ffffffffc238e000 573440 /tmp/crash-anaysis.Mm91f/modules/osp.ko ffffffffc254e340 lustre ffffffffc241b000 1904640 /tmp/crash-anaysis.Mm91f/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, 0xffff89ee855be788) 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 1024 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, 0xffff89ee91ea2da8) 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 1024 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, 0xffff89eeb69638e8) 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 1024 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, 0xffff89eeb7f64568) 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 1024 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_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 0 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_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 0 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_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 0 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_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 0 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 4096 total debug pages from 4 CPUs to /tmp/crash-anaysis.Mm91f/lustre.bin