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.4APTt/vmlinux [TAINTED] DUMPFILE: /exports/testreports/68883/testresults/sanity-compr-special10-zfs-rocky8.10_x86_64-rocky8.10_x86_64-retry1/oleg336-server-vmcore [PARTIAL DUMP] CPUS: 4 DATE: Wed Aug 26 13:30:22 EDT 2026 UPTIME: 00:06:32 LOAD AVERAGE: 1.89, 1.43, 0.71 TASKS: 355 NODENAME: oleg336-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: 6510 COMMAND: "dp_sync_taskq" TASK: ffff9ff4ba55a7c0 [THREAD_INFO: ffff9ff4ba55a7c0] 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_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 crc32_pclmul module mod: cannot find or load object file for pcspkr module mod: cannot find or load object file for i2c_piix4 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 rapl 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 intel_rapl_msr module mod: cannot find or load object file for ata_generic module mod: cannot find or load object file for squashfs module mod: cannot find or load object file for dns_resolver 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 ffffffffc07f9740 libcfs ffffffffc07d9000 225280 /tmp/crash-anaysis.4APTt/modules/libcfs.ko mod: cannot find or load object file for spl module mod: cannot find or load object file for zfs module ffffffffc121b3c0 lnet ffffffffc1140000 1490944 /tmp/crash-anaysis.4APTt/modules/lnet.ko ffffffffc12d6900 ksocklnd ffffffffc12ad000 270336 /tmp/crash-anaysis.4APTt/modules/ksocklnd.ko ffffffffc14370c0 obdclass ffffffffc12f0000 4415488 /tmp/crash-anaysis.4APTt/modules/obdclass.ko ffffffffc19b30c0 ptlrpc ffffffffc1727000 4173824 /tmp/crash-anaysis.4APTt/modules/ptlrpc.ko ffffffffc1b71880 ptlrpc_gss ffffffffc1b23000 524288 /tmp/crash-anaysis.4APTt/modules/ptlrpc_gss.ko ffffffffc1bb6c80 fld ffffffffc1ba4000 126976 /tmp/crash-anaysis.4APTt/modules/fld.ko ffffffffc1bd6ac0 fid ffffffffc1bc4000 126976 /tmp/crash-anaysis.4APTt/modules/fid.ko ffffffffc1bf6740 ec ffffffffc1be4000 81920 /tmp/crash-anaysis.4APTt/modules/ec.ko ffffffffc1c36080 lmv ffffffffc1bf9000 372736 /tmp/crash-anaysis.4APTt/modules/lmv.ko ffffffffc1cd7480 osc ffffffffc1c55000 790528 /tmp/crash-anaysis.4APTt/modules/osc.ko ffffffffc1d6fb00 lov ffffffffc1d17000 552960 /tmp/crash-anaysis.4APTt/modules/lov.ko ffffffffc1de9b80 mdc ffffffffc1d9f000 466944 /tmp/crash-anaysis.4APTt/modules/mdc.ko ffffffffc1e2e000 mgc ffffffffc1e12000 184320 /tmp/crash-anaysis.4APTt/modules/mgc.ko ffffffffc1e615c0 obdecho ffffffffc1e40000 225280 /tmp/crash-anaysis.4APTt/modules/obdecho.ko ffffffffc1f32340 lfsck ffffffffc1e78000 1081344 /tmp/crash-anaysis.4APTt/modules/lfsck.ko ffffffffc2001240 lquota ffffffffc1f81000 786432 /tmp/crash-anaysis.4APTt/modules/lquota.ko ffffffffc20adb80 osd_zfs ffffffffc2042000 659456 /tmp/crash-anaysis.4APTt/modules/osd_zfs.ko ffffffffc2147400 mgs ffffffffc20e4000 626688 /tmp/crash-anaysis.4APTt/modules/mgs.ko ffffffffc21f90c0 mdd ffffffffc217e000 745472 /tmp/crash-anaysis.4APTt/modules/mdd.ko ffffffffc2343900 mdt ffffffffc2235000 1654784 /tmp/crash-anaysis.4APTt/modules/mdt.ko ffffffffc2477900 lod ffffffffc23ca000 1064960 /tmp/crash-anaysis.4APTt/modules/lod.ko ffffffffc253de40 ofd ffffffffc24cf000 688128 /tmp/crash-anaysis.4APTt/modules/ofd.ko ffffffffc25d3f80 osp ffffffffc2578000 573440 /tmp/crash-anaysis.4APTt/modules/osp.ko ffffffffc273b780 lustre ffffffffc2605000 1925120 /tmp/crash-anaysis.4APTt/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, 0xffff9ff4901c66a8) 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 124 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, 0xffff9ff491984908) 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 143 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, 0xffff9ff4867ec088) 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 112 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, 0xffff9ff485b6b668) 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 508 total debug pages from 4 CPUs to /tmp/crash-anaysis.4APTt/lustre.bin