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.nt87A/vmlinux [TAINTED] DUMPFILE: /exports/testreports/68887/testresults/sanity-compr-special5-zfs-rocky8.10_x86_64-rocky8.10_x86_64/oleg222-server-vmcore [PARTIAL DUMP] CPUS: 4 DATE: Wed Aug 26 13:36:29 EDT 2026 UPTIME: 00:06:29 LOAD AVERAGE: 1.23, 1.34, 0.68 TASKS: 347 NODENAME: oleg222-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 0000000000000028" PID: 6507 COMMAND: "dp_sync_taskq" TASK: ffff9c30d8188000 [THREAD_INFO: ffff9c30d8188000] 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 libata module mod: cannot find or load object file for crc32c_intel 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 i2c_piix4 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 pcspkr module mod: cannot find or load object file for rapl 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 intel_rapl_common 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 squashfs module mod: cannot find or load object file for rpcsec_gss_krb5 module mod: cannot find or load object file for sb_edac 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 ffffffffc066b740 libcfs ffffffffc064b000 225280 /tmp/crash-anaysis.nt87A/modules/libcfs.ko mod: cannot find or load object file for spl module mod: cannot find or load object file for zfs module ffffffffc108d3c0 lnet ffffffffc0fb2000 1490944 /tmp/crash-anaysis.nt87A/modules/lnet.ko ffffffffc1148900 ksocklnd ffffffffc111f000 270336 /tmp/crash-anaysis.nt87A/modules/ksocklnd.ko ffffffffc12a90c0 obdclass ffffffffc1162000 4415488 /tmp/crash-anaysis.nt87A/modules/obdclass.ko ffffffffc18250c0 ptlrpc ffffffffc1599000 4173824 /tmp/crash-anaysis.nt87A/modules/ptlrpc.ko ffffffffc19e3880 ptlrpc_gss ffffffffc1995000 524288 /tmp/crash-anaysis.nt87A/modules/ptlrpc_gss.ko ffffffffc1a28c80 fld ffffffffc1a16000 126976 /tmp/crash-anaysis.nt87A/modules/fld.ko ffffffffc1a48ac0 fid ffffffffc1a36000 126976 /tmp/crash-anaysis.nt87A/modules/fid.ko ffffffffc1a68740 ec ffffffffc1a56000 81920 /tmp/crash-anaysis.nt87A/modules/ec.ko ffffffffc1aa8080 lmv ffffffffc1a6b000 372736 /tmp/crash-anaysis.nt87A/modules/lmv.ko ffffffffc1b49440 osc ffffffffc1ac7000 790528 /tmp/crash-anaysis.nt87A/modules/osc.ko ffffffffc1be1a80 lov ffffffffc1b89000 552960 /tmp/crash-anaysis.nt87A/modules/lov.ko ffffffffc1c5bb80 mdc ffffffffc1c11000 466944 /tmp/crash-anaysis.nt87A/modules/mdc.ko ffffffffc1ca0000 mgc ffffffffc1c84000 184320 /tmp/crash-anaysis.nt87A/modules/mgc.ko ffffffffc1cd35c0 obdecho ffffffffc1cb2000 225280 /tmp/crash-anaysis.nt87A/modules/obdecho.ko ffffffffc1da4340 lfsck ffffffffc1cea000 1081344 /tmp/crash-anaysis.nt87A/modules/lfsck.ko ffffffffc1e73240 lquota ffffffffc1df3000 786432 /tmp/crash-anaysis.nt87A/modules/lquota.ko ffffffffc1f1fb80 osd_zfs ffffffffc1eb4000 659456 /tmp/crash-anaysis.nt87A/modules/osd_zfs.ko ffffffffc1fb9400 mgs ffffffffc1f56000 626688 /tmp/crash-anaysis.nt87A/modules/mgs.ko ffffffffc206b0c0 mdd ffffffffc1ff0000 745472 /tmp/crash-anaysis.nt87A/modules/mdd.ko ffffffffc21b5900 mdt ffffffffc20a7000 1654784 /tmp/crash-anaysis.nt87A/modules/mdt.ko ffffffffc22e7680 lod ffffffffc223c000 1056768 /tmp/crash-anaysis.nt87A/modules/lod.ko ffffffffc23ade40 ofd ffffffffc233f000 688128 /tmp/crash-anaysis.nt87A/modules/ofd.ko ffffffffc2443f80 osp ffffffffc23e8000 573440 /tmp/crash-anaysis.nt87A/modules/osp.ko ffffffffc25aa580 lustre ffffffffc2475000 1912832 /tmp/crash-anaysis.nt87A/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, 0xffff9c30ca59be88) 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 128 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, 0xffff9c30c2d12628) 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 145 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, 0xffff9c30c54744e8) 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 133 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, 0xffff9c30c52ef108) 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 126 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 532 total debug pages from 4 CPUs to /tmp/crash-anaysis.nt87A/lustre.bin