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.cxxfV/vmlinux [TAINTED] DUMPFILE: /exports/testreports/68890/testresults/sanity-compr-special10-zfs-rocky8.10_x86_64-rocky8.10_x86_64/oleg247-server-vmcore [PARTIAL DUMP] CPUS: 4 DATE: Wed Aug 26 13:20:47 EDT 2026 UPTIME: 00:04:01 LOAD AVERAGE: 0.79, 0.82, 0.37 TASKS: 356 NODENAME: oleg247-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: 6471 COMMAND: "dp_sync_taskq" TASK: ffffa0c4d107a7c0 [THREAD_INFO: ffffa0c4d107a7c0] CPU: 3 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 ghash_clmulni_intel module mod: cannot find or load object file for crc32_pclmul module mod: cannot find or load object file for crct10dif_pclmul module mod: cannot find or load object file for ata_generic module mod: cannot find or load object file for pcspkr module mod: cannot find or load object file for dns_resolver module mod: cannot find or load object file for serio_raw module mod: cannot find or load object file for intel_rapl_msr module mod: cannot find or load object file for ata_piix module mod: cannot find or load object file for i2c_piix4 module mod: cannot find or load object file for crc32c_intel 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 ffffffffc07f5c80 fld ffffffffc07e3000 126976 /tmp/crash-anaysis.cxxfV/modules/fld.ko ffffffffc0815740 ec ffffffffc0803000 81920 /tmp/crash-anaysis.cxxfV/modules/ec.ko mod: cannot find or load object file for spl module mod: cannot find or load object file for zfs module ffffffffc116a740 libcfs ffffffffc114a000 225280 /tmp/crash-anaysis.cxxfV/modules/libcfs.ko ffffffffc125d3c0 lnet ffffffffc1182000 1490944 /tmp/crash-anaysis.cxxfV/modules/lnet.ko ffffffffc1318900 ksocklnd ffffffffc12ef000 270336 /tmp/crash-anaysis.cxxfV/modules/ksocklnd.ko ffffffffc14790c0 obdclass ffffffffc1332000 4415488 /tmp/crash-anaysis.cxxfV/modules/obdclass.ko ffffffffc19f50c0 ptlrpc ffffffffc1769000 4173824 /tmp/crash-anaysis.cxxfV/modules/ptlrpc.ko ffffffffc1bb3880 ptlrpc_gss ffffffffc1b65000 524288 /tmp/crash-anaysis.cxxfV/modules/ptlrpc_gss.ko ffffffffc1bf8ac0 fid ffffffffc1be6000 126976 /tmp/crash-anaysis.cxxfV/modules/fid.ko ffffffffc1c43080 lmv ffffffffc1c06000 372736 /tmp/crash-anaysis.cxxfV/modules/lmv.ko ffffffffc1ce4380 osc ffffffffc1c62000 790528 /tmp/crash-anaysis.cxxfV/modules/osc.ko ffffffffc1d7ca00 lov ffffffffc1d24000 552960 /tmp/crash-anaysis.cxxfV/modules/lov.ko ffffffffc1df6b80 mdc ffffffffc1dac000 466944 /tmp/crash-anaysis.cxxfV/modules/mdc.ko ffffffffc1e3b000 mgc ffffffffc1e1f000 184320 /tmp/crash-anaysis.cxxfV/modules/mgc.ko ffffffffc1e6e5c0 obdecho ffffffffc1e4d000 225280 /tmp/crash-anaysis.cxxfV/modules/obdecho.ko ffffffffc1f3f340 lfsck ffffffffc1e85000 1081344 /tmp/crash-anaysis.cxxfV/modules/lfsck.ko ffffffffc200e240 lquota ffffffffc1f8e000 786432 /tmp/crash-anaysis.cxxfV/modules/lquota.ko ffffffffc20bab80 osd_zfs ffffffffc204f000 659456 /tmp/crash-anaysis.cxxfV/modules/osd_zfs.ko ffffffffc2154400 mgs ffffffffc20f1000 626688 /tmp/crash-anaysis.cxxfV/modules/mgs.ko ffffffffc2206080 mdd ffffffffc218b000 745472 /tmp/crash-anaysis.cxxfV/modules/mdd.ko ffffffffc2350900 mdt ffffffffc2242000 1654784 /tmp/crash-anaysis.cxxfV/modules/mdt.ko ffffffffc2482540 lod ffffffffc23d7000 1056768 /tmp/crash-anaysis.cxxfV/modules/lod.ko ffffffffc2548e40 ofd ffffffffc24da000 688128 /tmp/crash-anaysis.cxxfV/modules/ofd.ko ffffffffc25def80 osp ffffffffc2583000 573440 /tmp/crash-anaysis.cxxfV/modules/osp.ko ffffffffc27444c0 lustre ffffffffc2610000 1908736 /tmp/crash-anaysis.cxxfV/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, 0xffffa0c4e04ce848) 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 116 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, 0xffffa0c4c4fdd0e8) 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 118 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, 0xffffa0c4c2adba48) 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 130 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, 0xffffa0c4e8a179e8) 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 101 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 465 total debug pages from 4 CPUs to /tmp/crash-anaysis.cxxfV/lustre.bin