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,
Vasily Averin
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