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.JJS0W/vmlinux [TAINTED] DUMPFILE: /exports/testreports/68247/testresults/conf-sanity-slow-106-zfs-rocky8.10_x86_64-rocky8.10_x86_64/oleg150-server-vmcore [PARTIAL DUMP] CPUS: 4 DATE: Wed Aug 19 21:48:37 EDT 2026 UPTIME: 00:09:40 LOAD AVERAGE: 2.66, 1.78, 0.98 TASKS: 305 NODENAME: oleg150-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: 18125 COMMAND: "mdt00_005" TASK: ffff990707b14f80 [THREAD_INFO: ffff990707b14f80] 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_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 intel_rapl_msr 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 crc32_pclmul module mod: cannot find or load object file for i2c_piix4 module mod: cannot find or load object file for pcspkr module mod: cannot find or load object file for serio_raw module mod: cannot find or load object file for dns_resolver module mod: cannot find or load object file for ata_generic 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 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 rapl 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 MODULE NAME BASE SIZE OBJECT FILE ffffffffc03cf740 libcfs ffffffffc03af000 225280 /tmp/crash-anaysis.JJS0W/modules/libcfs.ko mod: cannot find or load object file for auth_rpcgss module mod: cannot find or load object file for spl module mod: cannot find or load object file for zfs module ffffffffc0e363c0 lnet ffffffffc0d5b000 1490944 /tmp/crash-anaysis.JJS0W/modules/lnet.ko ffffffffc0ef1900 ksocklnd ffffffffc0ec8000 270336 /tmp/crash-anaysis.JJS0W/modules/ksocklnd.ko ffffffffc104cfc0 obdclass ffffffffc0f0b000 4374528 /tmp/crash-anaysis.JJS0W/modules/obdclass.ko ffffffffc15c5080 ptlrpc ffffffffc1338000 4182016 /tmp/crash-anaysis.JJS0W/modules/ptlrpc.ko ffffffffc1784880 ptlrpc_gss ffffffffc1736000 524288 /tmp/crash-anaysis.JJS0W/modules/ptlrpc_gss.ko ffffffffc17c9c80 fld ffffffffc17b7000 126976 /tmp/crash-anaysis.JJS0W/modules/fld.ko ffffffffc17e9ac0 fid ffffffffc17d7000 126976 /tmp/crash-anaysis.JJS0W/modules/fid.ko ffffffffc1809740 ec ffffffffc17f7000 81920 /tmp/crash-anaysis.JJS0W/modules/ec.ko ffffffffc1849080 lmv ffffffffc180c000 372736 /tmp/crash-anaysis.JJS0W/modules/lmv.ko ffffffffc18dfe00 osc ffffffffc1868000 729088 /tmp/crash-anaysis.JJS0W/modules/osc.ko ffffffffc1972780 lov ffffffffc191b000 548864 /tmp/crash-anaysis.JJS0W/modules/lov.ko ffffffffc19ecb80 mdc ffffffffc19a2000 466944 /tmp/crash-anaysis.JJS0W/modules/mdc.ko ffffffffc1a31000 mgc ffffffffc1a15000 184320 /tmp/crash-anaysis.JJS0W/modules/mgc.ko ffffffffc1a645c0 obdecho ffffffffc1a43000 225280 /tmp/crash-anaysis.JJS0W/modules/obdecho.ko ffffffffc1b350c0 lfsck ffffffffc1a7b000 1077248 /tmp/crash-anaysis.JJS0W/modules/lfsck.ko ffffffffc1c03200 lquota ffffffffc1b83000 786432 /tmp/crash-anaysis.JJS0W/modules/lquota.ko ffffffffc1caeac0 osd_zfs ffffffffc1c44000 655360 /tmp/crash-anaysis.JJS0W/modules/osd_zfs.ko ffffffffc1d48400 mgs ffffffffc1ce5000 626688 /tmp/crash-anaysis.JJS0W/modules/mgs.ko ffffffffc1dfa080 mdd ffffffffc1d7f000 745472 /tmp/crash-anaysis.JJS0W/modules/mdd.ko ffffffffc1f44880 mdt ffffffffc1e36000 1654784 /tmp/crash-anaysis.JJS0W/modules/mdt.ko ffffffffc2075240 lod ffffffffc1fcb000 1048576 /tmp/crash-anaysis.JJS0W/modules/lod.ko ffffffffc212e800 ofd ffffffffc20cc000 610304 /tmp/crash-anaysis.JJS0W/modules/ofd.ko ffffffffc21bdf80 osp ffffffffc2162000 573440 /tmp/crash-anaysis.JJS0W/modules/osp.ko ffffffffc2322340 lustre ffffffffc21ef000 1904640 /tmp/crash-anaysis.JJS0W/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, 0xffff990711868708) 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, 0xffff9907090a25c8) 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, 0xffff9907182226a8) 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, 0xffff99070673e628) 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_trace_pages(0, 5, 0xffff990711868608) 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 2 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, 0xffff99073bc29ba8) 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 3 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, 0xffff9907384607a8) 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 2 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, 0xffff9907182389a8) 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 1 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 4104 total debug pages from 4 CPUs to /tmp/crash-anaysis.JJS0W/lustre.bin