On 7/28/21, 11:14 AM, "crash-utility-bounces@redhat.com on behalf of David Wysochanski" <crash-utility-bounces@redhat.com on behalf of dwysocha@redhat.com> wrote:

        On Wed, Apr 28, 2021 at 8:54 AM lijiang <lijiang@redhat.com> wrote:
        >
        > ? 2021?04?26? 19:17, crash-utility-request@redhat.com ??:
        > > Message: 3
        > > Date: Mon, 26 Apr 2021 11:27:40 +0300
        > > From: Vasily Averin <vvs@virtuozzo.com>
        > > To: crash-utility@redhat.com
        > > Subject: [Crash-utility] crash does not work with last fedora kernels?
        > > Message-ID: <8f8782a9-3da6-5d3c-c509-8b8ec8a30957@virtuozzo.com>
        > > Content-Type: text/plain; charset=utf-8
        > >
        > > It looks like Fedora kernels uses gcc11 and generates debuginfo in DWARF 5 format.
        > >
        > > [root@localhost ~]# rpm -q crash
        > > crash-7.2.9-5.fc35.x86_64
        > > [root@localhost ~]# uname -a
        > > Linux localhost.localdomain 5.11.12-300.fc34.x86_64 #1 SMP Wed Apr 7 16:31:13 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
        > >
        > >
        > > [root@localhost ~]# crash -1
        > > Dwarf Error: wrong version in compilation unit header (is 5, should be 2, 3, or 4) [in module /usr/lib/debug/usr/lib/modules/5.11.12-300.fc34.x86_64/vmlinux]
        > > crash: gdb_session_init: pulling in debug data by accessing init_mm.mmap
        > > Dwarf Error: wrong version in compilation unit header (is 5, should be 2, 3, or 4) [in module /usr/lib/debug/usr/lib/modules/5.11.12-300.fc34.x86_64/vmlinux]
        > >
        > > crash: /usr/lib/debug/lib/modules/5.11.12-300.fc34.x86_64/vmlinux: no debugging data available
        > >
        > > [root@localhost ~]# ls -al /usr/lib/debug/lib/modules/5.11.12-300.fc34.x86_64/vmlinux
        > > -rwxr-xr-x. 1 root root 679679112 Apr  7 20:14 /usr/lib/debug/lib/modules/5.11.12-300.fc34.x86_64/vmlinux
        > > [root@localhost ~]# rpm -qf /usr/lib/debug/lib/modules/5.11.12-300.fc34.x86_64/vmlinux
        > > kernel-debuginfo-5.11.12-300.fc34.x86_64
        > >
        > > NB: last fc35 does not work too.
        > >
        >
        > Thank you for reporting this issue, Vasily.
        >
        > The DWARF-5 caused this failure. I will have a look and try to handle this issue later.
        >
        > Thanks.
        > Lianbo
        >

        What's the status of this issue?  Is this due to needing updated
        embedded gdb or something else?