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.buzQP/vmlinux [TAINTED] DUMPFILE: /exports/testreports/68899/testresults/sanity-compr-special10-zfs-DNE-rocky8.10_x86_64-rocky8.10_x86_64/oleg450-server-vmcore [PARTIAL DUMP] CPUS: 4 DATE: Wed Aug 26 11:02:48 EDT 2026 UPTIME: 00:07:07 LOAD AVERAGE: 1.06, 1.30, 0.71 TASKS: 404 NODENAME: oleg450-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: 7926 COMMAND: "dp_sync_taskq" TASK: ffff916301864f80 [THREAD_INFO: ffff916301864f80] CPU: 0 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 ata_generic module mod: cannot find or load object file for intel_rapl_msr 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 crct10dif_pclmul 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 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 rpcsec_gss_krb5 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 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 ffffffffc06c1740 libcfs ffffffffc06a1000 225280 /tmp/crash-anaysis.buzQP/modules/libcfs.ko mod: cannot find or load object file for spl module mod: cannot find or load object file for zfs module ffffffffc10e33c0 lnet ffffffffc1008000 1490944 /tmp/crash-anaysis.buzQP/modules/lnet.ko ffffffffc119e900 ksocklnd ffffffffc1175000 270336 /tmp/crash-anaysis.buzQP/modules/ksocklnd.ko ffffffffc12ff0c0 obdclass ffffffffc11b8000 4415488 /tmp/crash-anaysis.buzQP/modules/obdclass.ko ffffffffc187b0c0 ptlrpc ffffffffc15ef000 4173824 /tmp/crash-anaysis.buzQP/modules/ptlrpc.ko ffffffffc1a39880 ptlrpc_gss ffffffffc19eb000 524288 /tmp/crash-anaysis.buzQP/modules/ptlrpc_gss.ko ffffffffc1a7ec80 fld ffffffffc1a6c000 126976 /tmp/crash-anaysis.buzQP/modules/fld.ko ffffffffc1a9eac0 fid ffffffffc1a8c000 126976 /tmp/crash-anaysis.buzQP/modules/fid.ko ffffffffc1abe740 ec ffffffffc1aac000 81920 /tmp/crash-anaysis.buzQP/modules/ec.ko ffffffffc1afe080 lmv ffffffffc1ac1000 372736 /tmp/crash-anaysis.buzQP/modules/lmv.ko ffffffffc1b9f340 osc ffffffffc1b1d000 790528 /tmp/crash-anaysis.buzQP/modules/osc.ko ffffffffc1c37a00 lov ffffffffc1bdf000 552960 /tmp/crash-anaysis.buzQP/modules/lov.ko ffffffffc1cb1b80 mdc ffffffffc1c67000 466944 /tmp/crash-anaysis.buzQP/modules/mdc.ko ffffffffc1cf6000 mgc ffffffffc1cda000 184320 /tmp/crash-anaysis.buzQP/modules/mgc.ko ffffffffc1d295c0 obdecho ffffffffc1d08000 225280 /tmp/crash-anaysis.buzQP/modules/obdecho.ko ffffffffc1dfa340 lfsck ffffffffc1d40000 1081344 /tmp/crash-anaysis.buzQP/modules/lfsck.ko ffffffffc1ec9240 lquota ffffffffc1e49000 786432 /tmp/crash-anaysis.buzQP/modules/lquota.ko ffffffffc1f75b80 osd_zfs ffffffffc1f0a000 659456 /tmp/crash-anaysis.buzQP/modules/osd_zfs.ko ffffffffc200f400 mgs ffffffffc1fac000 626688 /tmp/crash-anaysis.buzQP/modules/mgs.ko ffffffffc20c1080 mdd ffffffffc2046000 745472 /tmp/crash-anaysis.buzQP/modules/mdd.ko ffffffffc220b900 mdt ffffffffc20fd000 1654784 /tmp/crash-anaysis.buzQP/modules/mdt.ko ffffffffc233d540 lod ffffffffc2292000 1056768 /tmp/crash-anaysis.buzQP/modules/lod.ko ffffffffc2403e00 ofd ffffffffc2395000 688128 /tmp/crash-anaysis.buzQP/modules/ofd.ko ffffffffc2499f80 osp ffffffffc243e000 573440 /tmp/crash-anaysis.buzQP/modules/osp.ko ffffffffc25ff4c0 lustre ffffffffc24cb000 1908736 /tmp/crash-anaysis.buzQP/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, 0xffff9162ca502f68) 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 220 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, 0xffff9162c5f39288) 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 213 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, 0xffff9162c5205d68) 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 206 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, 0xffff9162e9778208) 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 199 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 838 total debug pages from 4 CPUs to /tmp/crash-anaysis.buzQP/lustre.bin