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.K6qtG/vmlinux [TAINTED] DUMPFILE: /exports/testreports/68898/testresults/sanity-compr-special1-zfs-rocky8.10_x86_64-rocky8.10_x86_64/oleg622-server-vmcore [PARTIAL DUMP] CPUS: 4 DATE: Wed Aug 26 09:24:15 EDT 2026 UPTIME: 00:05:21 LOAD AVERAGE: 1.52, 1.00, 0.45 TASKS: 359 NODENAME: oleg622-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: 6483 COMMAND: "dp_sync_taskq" TASK: ffff975dae638000 [THREAD_INFO: ffff975dae638000] 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_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 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 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 crc32c_intel module mod: cannot find or load object file for squashfs module mod: cannot find or load object file for intel_rapl_common module mod: cannot find or load object file for dns_resolver 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 ffffffffc076c740 libcfs ffffffffc074c000 225280 /tmp/crash-anaysis.K6qtG/modules/libcfs.ko mod: cannot find or load object file for spl module mod: cannot find or load object file for zfs module ffffffffc118e3c0 lnet ffffffffc10b3000 1490944 /tmp/crash-anaysis.K6qtG/modules/lnet.ko ffffffffc1249900 ksocklnd ffffffffc1220000 270336 /tmp/crash-anaysis.K6qtG/modules/ksocklnd.ko ffffffffc13aa0c0 obdclass ffffffffc1263000 4415488 /tmp/crash-anaysis.K6qtG/modules/obdclass.ko ffffffffc19260c0 ptlrpc ffffffffc169a000 4173824 /tmp/crash-anaysis.K6qtG/modules/ptlrpc.ko ffffffffc1ae4880 ptlrpc_gss ffffffffc1a96000 524288 /tmp/crash-anaysis.K6qtG/modules/ptlrpc_gss.ko ffffffffc1b29c80 fld ffffffffc1b17000 126976 /tmp/crash-anaysis.K6qtG/modules/fld.ko ffffffffc1b49ac0 fid ffffffffc1b37000 126976 /tmp/crash-anaysis.K6qtG/modules/fid.ko ffffffffc1b69740 ec ffffffffc1b57000 81920 /tmp/crash-anaysis.K6qtG/modules/ec.ko ffffffffc1ba9080 lmv ffffffffc1b6c000 372736 /tmp/crash-anaysis.K6qtG/modules/lmv.ko ffffffffc1c4a380 osc ffffffffc1bc8000 790528 /tmp/crash-anaysis.K6qtG/modules/osc.ko ffffffffc1ce2a00 lov ffffffffc1c8a000 552960 /tmp/crash-anaysis.K6qtG/modules/lov.ko ffffffffc1d5cb80 mdc ffffffffc1d12000 466944 /tmp/crash-anaysis.K6qtG/modules/mdc.ko ffffffffc1da1000 mgc ffffffffc1d85000 184320 /tmp/crash-anaysis.K6qtG/modules/mgc.ko ffffffffc1dd45c0 obdecho ffffffffc1db3000 225280 /tmp/crash-anaysis.K6qtG/modules/obdecho.ko ffffffffc1ea5340 lfsck ffffffffc1deb000 1081344 /tmp/crash-anaysis.K6qtG/modules/lfsck.ko ffffffffc1f74240 lquota ffffffffc1ef4000 786432 /tmp/crash-anaysis.K6qtG/modules/lquota.ko ffffffffc2020b80 osd_zfs ffffffffc1fb5000 659456 /tmp/crash-anaysis.K6qtG/modules/osd_zfs.ko ffffffffc20ba400 mgs ffffffffc2057000 626688 /tmp/crash-anaysis.K6qtG/modules/mgs.ko ffffffffc216c080 mdd ffffffffc20f1000 745472 /tmp/crash-anaysis.K6qtG/modules/mdd.ko ffffffffc22b6900 mdt ffffffffc21a8000 1654784 /tmp/crash-anaysis.K6qtG/modules/mdt.ko ffffffffc23e8540 lod ffffffffc233d000 1056768 /tmp/crash-anaysis.K6qtG/modules/lod.ko ffffffffc24aee00 ofd ffffffffc2440000 688128 /tmp/crash-anaysis.K6qtG/modules/ofd.ko ffffffffc2544f80 osp ffffffffc24e9000 573440 /tmp/crash-anaysis.K6qtG/modules/osp.ko ffffffffc26aa4c0 lustre ffffffffc2576000 1908736 /tmp/crash-anaysis.K6qtG/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, 0xffff975d882033a8) 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 133 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, 0xffff975d83967208) 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 114 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, 0xffff975d855f6288) 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 107 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, 0xffff975d8938cc28) 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 117 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 471 total debug pages from 4 CPUs to /tmp/crash-anaysis.K6qtG/lustre.bin