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.3b2Lv/vmlinux [TAINTED] DUMPFILE: /exports/testreports/68908/testresults/sanity-compr-special7-zfs-rocky8.10_x86_64-rocky8.10_x86_64/oleg455-server-vmcore [PARTIAL DUMP] CPUS: 4 DATE: Wed Aug 26 10:41:12 EDT 2026 UPTIME: 00:06:13 LOAD AVERAGE: 1.75, 1.39, 0.68 TASKS: 338 NODENAME: oleg455-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: 6514 COMMAND: "dp_sync_taskq" TASK: ffff88ff98940000 [THREAD_INFO: ffff88ff98940000] 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_mirror 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 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 ata_generic 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 dns_resolver module mod: cannot find or load object file for crct10dif_pclmul 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 i2c_piix4 module mod: cannot find or load object file for intel_rapl_common 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 mod: cannot find or load object file for rpcsec_gss_krb5 module MODULE NAME BASE SIZE OBJECT FILE ffffffffc0608740 libcfs ffffffffc05e8000 225280 /tmp/crash-anaysis.3b2Lv/modules/libcfs.ko mod: cannot find or load object file for spl module mod: cannot find or load object file for zfs module ffffffffc102a3c0 lnet ffffffffc0f4f000 1490944 /tmp/crash-anaysis.3b2Lv/modules/lnet.ko ffffffffc10e5900 ksocklnd ffffffffc10bc000 270336 /tmp/crash-anaysis.3b2Lv/modules/ksocklnd.ko ffffffffc1244a80 obdclass ffffffffc10ff000 4403200 /tmp/crash-anaysis.3b2Lv/modules/obdclass.ko ffffffffc17bf0c0 ptlrpc ffffffffc1533000 4173824 /tmp/crash-anaysis.3b2Lv/modules/ptlrpc.ko ffffffffc197d880 ptlrpc_gss ffffffffc192f000 524288 /tmp/crash-anaysis.3b2Lv/modules/ptlrpc_gss.ko ffffffffc19c2c80 fld ffffffffc19b0000 126976 /tmp/crash-anaysis.3b2Lv/modules/fld.ko ffffffffc19e2ac0 fid ffffffffc19d0000 126976 /tmp/crash-anaysis.3b2Lv/modules/fid.ko ffffffffc1a02740 ec ffffffffc19f0000 81920 /tmp/crash-anaysis.3b2Lv/modules/ec.ko ffffffffc1a42080 lmv ffffffffc1a05000 372736 /tmp/crash-anaysis.3b2Lv/modules/lmv.ko ffffffffc1ae3200 osc ffffffffc1a61000 790528 /tmp/crash-anaysis.3b2Lv/modules/osc.ko ffffffffc1b7ba00 lov ffffffffc1b23000 552960 /tmp/crash-anaysis.3b2Lv/modules/lov.ko ffffffffc1bf5b80 mdc ffffffffc1bab000 466944 /tmp/crash-anaysis.3b2Lv/modules/mdc.ko ffffffffc1c3a000 mgc ffffffffc1c1e000 184320 /tmp/crash-anaysis.3b2Lv/modules/mgc.ko ffffffffc1c6d5c0 obdecho ffffffffc1c4c000 225280 /tmp/crash-anaysis.3b2Lv/modules/obdecho.ko ffffffffc1d3e340 lfsck ffffffffc1c84000 1081344 /tmp/crash-anaysis.3b2Lv/modules/lfsck.ko ffffffffc1e0d240 lquota ffffffffc1d8d000 786432 /tmp/crash-anaysis.3b2Lv/modules/lquota.ko ffffffffc1eb8ac0 osd_zfs ffffffffc1e4e000 655360 /tmp/crash-anaysis.3b2Lv/modules/osd_zfs.ko ffffffffc1f52400 mgs ffffffffc1eef000 626688 /tmp/crash-anaysis.3b2Lv/modules/mgs.ko ffffffffc2004080 mdd ffffffffc1f89000 745472 /tmp/crash-anaysis.3b2Lv/modules/mdd.ko ffffffffc214e940 mdt ffffffffc2040000 1654784 /tmp/crash-anaysis.3b2Lv/modules/mdt.ko ffffffffc2280480 lod ffffffffc21d5000 1052672 /tmp/crash-anaysis.3b2Lv/modules/lod.ko ffffffffc2345ac0 ofd ffffffffc22d7000 684032 /tmp/crash-anaysis.3b2Lv/modules/ofd.ko ffffffffc23daf80 osp ffffffffc237f000 573440 /tmp/crash-anaysis.3b2Lv/modules/osp.ko ffffffffc25406c0 lustre ffffffffc240c000 1912832 /tmp/crash-anaysis.3b2Lv/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, 0xffff88ff89b8ee48) 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 127 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, 0xffff88ff90e3ae28) 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 146 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, 0xffff88ff999c88c8) 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 146 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, 0xffff88ffa024ab28) 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 129 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 548 total debug pages from 4 CPUs to /tmp/crash-anaysis.3b2Lv/lustre.bin