[PATCH V5 2/2] rpm-pkg: avoid install/remove the running kernel

[Jose Ignacio Tornos Martinez <jtornosm@redhat.com>]

Normally, upper tools and scripts are checking if we want to modify the
running kernel but not always. Check install and remove operation that
affect the running kernel to avoid possible issues.

Tested with Fedora 38, Fedora 39, RHEL 9, Oracle Linux 9.3,
openSUSE Tumbleweed and openMandrive ROME, using dnf/zypper and rpm tools.

cc: stable@vger.kernel.org
Signed-off-by: Jose Ignacio Tornos Martinez <jtornosm@redhat.com>
---
 scripts/package/kernel.spec | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/scripts/package/kernel.spec b/scripts/package/kernel.spec
index 74542af8cbfe..216514cbf5f6 100644
--- a/scripts/package/kernel.spec
+++ b/scripts/package/kernel.spec
@@ -69,6 +69,12 @@ ln -fns /usr/src/kernels/%{KERNELRELEASE} %{buildroot}/lib/modules/%{KERNELRELEA
 %clean
 rm -rf %{buildroot}
 
+%pre
+if [ $(uname -r) == %{KERNELRELEASE} ];then
+echo "same kernel release is running" > /dev/stderr
+exit 1
+fi
+
 %post
 if [ -x /usr/bin/kernel-install ]; then
 /usr/bin/kernel-install add %{KERNELRELEASE} /lib/modules/%{KERNELRELEASE}/vmlinuz
@@ -85,6 +91,10 @@ fi
 done
 
 %preun
+if [ $(uname -r) == %{KERNELRELEASE} ];then
+echo "same kernel release is running" > /dev/stderr
+exit 1
+fi
 if [ -x /sbin/new-kernel-pkg ]; then
 new-kernel-pkg --remove %{KERNELRELEASE} --rminitrd --initrdfile=/boot/initramfs-%{KERNELRELEASE}.img
 elif [ -x /usr/bin/kernel-install ]; then
-- 
2.43.0