diff -Nru cryptsetup-2.6.1/debian/changelog cryptsetup-2.6.1/debian/changelog
--- cryptsetup-2.6.1/debian/changelog	2024-01-03 10:38:16.000000000 +0000
+++ cryptsetup-2.6.1/debian/changelog	2024-02-20 07:44:59.000000000 +0000
@@ -1,3 +1,10 @@
+cryptsetup (2:2.6.1-6ubuntu2) noble; urgency=medium
+
+  * Refine proc mounts entries traversal (LP: #2054390)
+    - d/functions: use awk to filter out relevant mount points initially
+
+ -- Chengen Du <chengen.du@canonical.com>  Tue, 20 Feb 2024 07:44:59 +0000
+
 cryptsetup (2:2.6.1-6ubuntu1) noble; urgency=medium
 
   * Merge with Debian unstable. Remaining changes:
diff -Nru cryptsetup-2.6.1/debian/functions cryptsetup-2.6.1/debian/functions
--- cryptsetup-2.6.1/debian/functions	2024-01-03 10:38:16.000000000 +0000
+++ cryptsetup-2.6.1/debian/functions	2024-02-20 07:44:55.000000000 +0000
@@ -612,8 +612,7 @@
         # treat lines starting with '#' as comments; /proc/mounts
         # doesn't seem to contain these but per procfs(5) the format of
         # that file is analogous to fstab(5)'s
-        if [ "${spec#\#}" = "$spec" ] && [ -n "$spec" ] &&
-                [ "$(printf '%b' "$mountpoint")" = "$wantmount" ]; then
+        if [ "${spec#\#}" = "$spec" ] && [ -n "$spec" ]; then
             # take the last mountpoint if used several times (shadowed)
             unset -v devnos
             spec="$(printf '%b' "$spec")"
@@ -639,7 +638,9 @@
                 devnos="$MAJ:$MIN"
             fi
         fi
-    done </proc/mounts
+    done <<EOF
+$(awk -v mp="$wantmount" '$2 == mp' /proc/mounts | tail -n 1)
+EOF
 
     if [ -z "${devnos:+x}" ]; then
         return 1 # not found