Comment # 2 on bug 1231040 from Jiri Slaby

How is the kernel installed into the image?

I see no /boot/vmlinuz link in the image so mkdumprd fails:
+ '[' -f /boot/vmlinuz ']'
+ echo 'Kernel not found.'
Kernel not found.

If I run the post script of the kernel manually:
# rpm -q kernel-default-base --scripts|grep -A11 'postinstall scriptlet'
postinstall scriptlet (using /bin/sh):
run_if_exists() { 
if [ -x "$1" ] ; then                   
  "$@"                                  
else                                    
  echo Cannot execute "$1" >&2          
fi                                      
}                                       
run_if_exists /usr/lib/module-init-tools/kernel-scriptlets/rpm-post --name
"kernel-default" \
  --version "6.11.0" --release "1.1" --kernelrelease "6.11.0-1" \
  --image "vmlinuz" --flavor "default" --variant "" \
  --usrmerged "1" --certs "1F673297" "$@"



as:

# sh -xx /usr/lib/module-init-tools/kernel-scriptlets/rpm-post --name
"kernel-default" --version "6.11.0" --release "1.1" --kernelrelease "6.11.0-1"
--image "vmlinuz" --flavor "default" --variant "" --usrmerged "1" --certs
"1F673297" "$@"



the link is correctly created:
# ls -l /boot/vmlinuz
lrwxrwxrwx 1 root root 24 Sep 30 09:18 /boot/vmlinuz ->
vmlinuz-6.11.0-1-default

and mkdumprd works:
...
dracut[I]: *** Creating initramfs image file '/var/lib/kdump/initrd' done ***