kdumpctl: fix fragile loops over find output

upstream: fedora
resolves: bz2003832
conflict: none

commit dfb76467c9
Author: Kairui Song <kasong@redhat.com>
Date:   Wed Aug 4 16:22:17 2021 +0800

    kdumpctl: fix fragile loops over find output

    For loops over find output are fragile, use a while read loop:
    https://github.com/koalaman/shellcheck/wiki/SC2044

    Signed-off-by: Kairui Song <kasong@redhat.com>
    Acked-by: Philipp Rudo <prudo@redhat.com

Signed-off-by: Tao Liu <ltao@redhat.com>

kdumpctl

@@ -912,12 +912,12 @@ selinux_relabel()
 		return
 	fi
 
-	for _i in $(find $_path); do
-		_attr=$(getfattr -m "security.selinux" $_i 2>/dev/null)
+	while IFS= read -r -d '' _i; do
+		_attr=$(getfattr -m "security.selinux" "$_i" 2>/dev/null)
 		if [ -z "$_attr" ]; then
-			restorecon $_i;
+			restorecon "$_i";
 		fi
-	done
+	done < <(find "$_path" -print0)
 }
 
 check_fence_kdump_config()