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.ZhjgI/vmlinux [TAINTED] DUMPFILE: /exports/testreports/68890/testresults/sanity-compr-special5-zfs-rocky8.10_x86_64-rocky8.10_x86_64/oleg256-server-vmcore [PARTIAL DUMP] CPUS: 4 DATE: Wed Aug 26 13:21:19 EDT 2026 UPTIME: 00:04:01 LOAD AVERAGE: 0.53, 0.52, 0.24 TASKS: 362 NODENAME: oleg256-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: 6451 COMMAND: "dp_sync_taskq" TASK: ffff8f6240f4a7c0 [THREAD_INFO: ffff8f6240f4a7c0] 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_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 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 intel_rapl_msr 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 crc32c_intel module mod: cannot find or load object file for crct10dif_pclmul 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 rapl module mod: cannot find or load object file for auth_rpcgss 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 rpcsec_gss_krb5 module MODULE NAME BASE SIZE OBJECT FILE ffffffffc06e7740 libcfs ffffffffc06c7000 225280 /tmp/crash-anaysis.ZhjgI/modules/libcfs.ko mod: cannot find or load object file for spl module mod: cannot find or load object file for zfs module ffffffffc11093c0 lnet ffffffffc102e000 1490944 /tmp/crash-anaysis.ZhjgI/modules/lnet.ko ffffffffc11c4900 ksocklnd ffffffffc119b000 270336 /tmp/crash-anaysis.ZhjgI/modules/ksocklnd.ko ffffffffc13250c0 obdclass ffffffffc11de000 4415488 /tmp/crash-anaysis.ZhjgI/modules/obdclass.ko ffffffffc18a10c0 ptlrpc ffffffffc1615000 4173824 /tmp/crash-anaysis.ZhjgI/modules/ptlrpc.ko ffffffffc1a5f880 ptlrpc_gss ffffffffc1a11000 524288 /tmp/crash-anaysis.ZhjgI/modules/ptlrpc_gss.ko ffffffffc1aa4c80 fld ffffffffc1a92000 126976 /tmp/crash-anaysis.ZhjgI/modules/fld.ko ffffffffc1ac4ac0 fid ffffffffc1ab2000 126976 /tmp/crash-anaysis.ZhjgI/modules/fid.ko ffffffffc1ae4740 ec ffffffffc1ad2000 81920 /tmp/crash-anaysis.ZhjgI/modules/ec.ko ffffffffc1b24080 lmv ffffffffc1ae7000 372736 /tmp/crash-anaysis.ZhjgI/modules/lmv.ko ffffffffc1bc5380 osc ffffffffc1b43000 790528 /tmp/crash-anaysis.ZhjgI/modules/osc.ko ffffffffc1c5da00 lov ffffffffc1c05000 552960 /tmp/crash-anaysis.ZhjgI/modules/lov.ko ffffffffc1cd7b80 mdc ffffffffc1c8d000 466944 /tmp/crash-anaysis.ZhjgI/modules/mdc.ko ffffffffc1d1c000 mgc ffffffffc1d00000 184320 /tmp/crash-anaysis.ZhjgI/modules/mgc.ko ffffffffc1d4f5c0 obdecho ffffffffc1d2e000 225280 /tmp/crash-anaysis.ZhjgI/modules/obdecho.ko ffffffffc1e20340 lfsck ffffffffc1d66000 1081344 /tmp/crash-anaysis.ZhjgI/modules/lfsck.ko ffffffffc1eef240 lquota ffffffffc1e6f000 786432 /tmp/crash-anaysis.ZhjgI/modules/lquota.ko ffffffffc1f9bb80 osd_zfs ffffffffc1f30000 659456 /tmp/crash-anaysis.ZhjgI/modules/osd_zfs.ko ffffffffc2035400 mgs ffffffffc1fd2000 626688 /tmp/crash-anaysis.ZhjgI/modules/mgs.ko ffffffffc20e7080 mdd ffffffffc206c000 745472 /tmp/crash-anaysis.ZhjgI/modules/mdd.ko ffffffffc2231900 mdt ffffffffc2123000 1654784 /tmp/crash-anaysis.ZhjgI/modules/mdt.ko ffffffffc2363540 lod ffffffffc22b8000 1056768 /tmp/crash-anaysis.ZhjgI/modules/lod.ko ffffffffc2429e40 ofd ffffffffc23bb000 688128 /tmp/crash-anaysis.ZhjgI/modules/ofd.ko ffffffffc24bff80 osp ffffffffc2464000 573440 /tmp/crash-anaysis.ZhjgI/modules/osp.ko ffffffffc26254c0 lustre ffffffffc24f1000 1908736 /tmp/crash-anaysis.ZhjgI/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, 0xffff8f6210fefbe8) 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 112 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, 0xffff8f6202ec6968) 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 126 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, 0xffff8f62095f0ea8) 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 127 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, 0xffff8f62180df768) 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 96 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 461 total debug pages from 4 CPUs to /tmp/crash-anaysis.ZhjgI/lustre.bin