Public bug reported: [environment] * ubuntu version ``` jeff-kvm@ubuntu:/var/crash$ uname -r 5.13.0-17-generic ``` * crash version ``` jeff-kvm@ubuntu:/var/crash$ crash -v
crash 7.2.8 ... GNU gdb (GDB) 7.6 Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> 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-unknown-linux-gnu". ``` [Description of problem:] ``` root@ubuntu:/var/crash/202110312024# crash dump.202110312024 /home/jeff-kvm/Downloads/jeff/usr/lib/debug/boot/vmlinux-5.13.0-17-generic crash 7.2.8 Copyright (C) 2002-2020 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 NEC Corporation Copyright (C) 1999, 2002, 2007 Silicon Graphics, Inc. Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, 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. GNU gdb (GDB) 7.6 Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> 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-unknown-linux-gnu"... WARNING: kernel relocated [362MB]: patching 139284 gdb minimal_symbol values please wait... (patching 139284 gdb minimal_symbol values) Segmentation fault (core dumped) ``` And we can see the following error report(see dmesg): ``` [ 1198.548759] crash[3580]: segfault at 7ffffc57dff8 ip 0000560ea1af5ec0 sp 00007ffffc57e000 error 6 in crash[560ea1ad9000+43f000] [ 1198.548768] Code: 05 a5 3d 6c 00 48 39 78 08 0f 97 c0 0f b6 c0 c3 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 41 57 41 89 f7 41 56 41 55 49 89 cd <41> 54 49 89 fc 55 48 89 d5 53 4c 89 cb 48 83 ec 48 4c 89 04 24 64 ``` And we can see the crash-utility proc mem map(_usr_bin_crash.0.crash): ``` .... 7fb97b7d4000-7fb97b7d5000 rw-p 0002d000 08:05 2234671 /usr/lib/x86_64-linux-gnu/ld-2.31.so 7fb97b7d5000-7fb97b7d6000 rw-p 00000000 00:00 0 7ffffc57e000-7ffffcd7e000 rw-p 00000000 00:00 0 [stack] 7ffffcdb1000-7ffffcdb5000 r--p 00000000 00:00 0 [vvar] 7ffffcdb5000-7ffffcdb7000 r-xp 00000000 00:00 0 [vdso] ffffffffff600000-ffffffffff601000 --xp 00000000 00:00 0 [vsyscall] ... ProcStatus: ``` it seems that it's stack overflow,because segfault at 7ffffc57dff8,but the [stack]: 7ffffc57e000-7ffffcd7e000 [How to reproducible] always Steps to Reproduce: 1. Generate a vmcore with the sysrq 2. crash vmlinux vmcore 3. Actual results: Segmentation fault (core dumped) Expected results: crash can work as expected. ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: crash segfault ** Tags added: crash ** Tags added: segfault ** Description changed: - ### environment + [environment] * ubuntu version ``` jeff-kvm@ubuntu:/var/crash$ uname -r 5.13.0-17-generic ``` * crash version ``` jeff-kvm@ubuntu:/var/crash$ crash -v crash 7.2.8 ... GNU gdb (GDB) 7.6 Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> 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-unknown-linux-gnu". + ``` - ### Description of problem: + + + [Description of problem:] ``` root@ubuntu:/var/crash/202110312024# crash dump.202110312024 /home/jeff-kvm/Downloads/jeff/usr/lib/debug/boot/vmlinux-5.13.0-17-generic crash 7.2.8 Copyright (C) 2002-2020 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 NEC Corporation Copyright (C) 1999, 2002, 2007 Silicon Graphics, Inc. Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, 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. - + GNU gdb (GDB) 7.6 Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> 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-unknown-linux-gnu"... WARNING: kernel relocated [362MB]: patching 139284 gdb minimal_symbol values please wait... (patching 139284 gdb minimal_symbol values) Segmentation fault (core dumped) ``` And we can see the following error report(see dmesg): ``` [ 1198.548759] crash[3580]: segfault at 7ffffc57dff8 ip 0000560ea1af5ec0 sp 00007ffffc57e000 error 6 in crash[560ea1ad9000+43f000] [ 1198.548768] Code: 05 a5 3d 6c 00 48 39 78 08 0f 97 c0 0f b6 c0 c3 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 41 57 41 89 f7 41 56 41 55 49 89 cd <41> 54 49 89 fc 55 48 89 d5 53 4c 89 cb 48 83 ec 48 4c 89 04 24 64 ``` And we can see the crash-utility proc mem map(_usr_bin_crash.0.crash): ``` .... - 7fb97b7d4000-7fb97b7d5000 rw-p 0002d000 08:05 2234671 /usr/lib/x86_64-linux-gnu/ld-2.31.so - 7fb97b7d5000-7fb97b7d6000 rw-p 00000000 00:00 0 - 7ffffc57e000-7ffffcd7e000 rw-p 00000000 00:00 0 [stack] - 7ffffcdb1000-7ffffcdb5000 r--p 00000000 00:00 0 [vvar] - 7ffffcdb5000-7ffffcdb7000 r-xp 00000000 00:00 0 [vdso] - ffffffffff600000-ffffffffff601000 --xp 00000000 00:00 0 [vsyscall] + 7fb97b7d4000-7fb97b7d5000 rw-p 0002d000 08:05 2234671 /usr/lib/x86_64-linux-gnu/ld-2.31.so + 7fb97b7d5000-7fb97b7d6000 rw-p 00000000 00:00 0 + 7ffffc57e000-7ffffcd7e000 rw-p 00000000 00:00 0 [stack] + 7ffffcdb1000-7ffffcdb5000 r--p 00000000 00:00 0 [vvar] + 7ffffcdb5000-7ffffcdb7000 r-xp 00000000 00:00 0 [vdso] + ffffffffff600000-ffffffffff601000 --xp 00000000 00:00 0 [vsyscall] ... ProcStatus: ``` - it seems that it's stack overflow,because segfault at 7ffffc57dff8,but the [stack]: 7ffffc57e000-7ffffcd7e000 + it seems that it's stack overflow,because segfault at 7ffffc57dff8,but the [stack]: 7ffffc57e000-7ffffcd7e000 - ### How to reproducible + + [How to reproducible] always Steps to Reproduce: 1. Generate a vmcore with the sysrq 2. crash vmlinux vmcore 3. Actual results: Segmentation fault (core dumped) Expected results: crash can work as expected. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1949359 Title: crash-utility segfault in ubuntu20.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1949359/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
