diff --git a/kpatch.spec b/kpatch.spec
index c0fbc39446046c4473e37f716eb6027cf923fbe8..072ba8f7a366e77fbcc17274e949cd01c389e0ae 100644
--- a/kpatch.spec
+++ b/kpatch.spec
@@ -1,7 +1,7 @@
 Name:           kpatch
 Epoch:          1
 Version:        0.9.9
-Release:        14
+Release:        15
 Summary:        A Linux dynamic kernel patching infrastructure
 
 License:        GPLv2
@@ -127,11 +127,17 @@ popd
 %{_mandir}/man1/*.1.gz
 
 %changelog
+* Thu Jul 10 2025 fuanan <fuanan3@h-partners.com> - 1:0.9.9-15
+- Type:bugfix
+- CVE:NA
+- SUG:NA
+- DESC:Delete the lock after make_hotpatch single instance run.
+
 * Thu Jun 26 2025 jinsaihang <jinsaihang@h-partners.com> - 1:0.9.9-14
 - Type:bugfix
 - CVE:NA  
 - SUG:NA  
-- DESC:make sure make_hotpath is running in a single instance
+- DESC:make sure make_hotpatch is running in a single instance
 
 * Tue Jun 03 2025 jinsaihang <jinsaihang@h-partners.com> - 1:0.9.9-13
 - Type:bugfix
diff --git a/make_hotpatch b/make_hotpatch
index 358754c9dbee0b1d2ed0d1819a33204bcd118eb7..e5d9f71020725ed114da528471614d03b63cbd08 100644
--- a/make_hotpatch
+++ b/make_hotpatch
@@ -121,7 +121,7 @@ function fn_check_reg_char()
         echo "error: the string is empty, check string failed"
         return 1
     fi
-    ## character string length
+    # character string length
     if [ -n "$l_str_maxlen" ] && [ -z "`echo $l_str_maxlen | sed 's/[0-9]//g'`" ];then
         if [ $len_str -gt $l_str_maxlen ]; then
             echo "error: The length of $l_str exceed max length $l_str_maxlen." 
@@ -138,7 +138,7 @@ function fn_check_reg_char()
         echo "error: string $l_str must start with a character ('0-9' or 'A-Z' or 'a-z')."
         return 1
     fi 
-    # only '-' and '_' numbers and letters are allowed
+    # only '-' and '_' and numbers and letters are allowed
     if [ -n "`echo $l_str | grep -E '[^a-z0-9A-Z_-]'`" ];then
         if [ -n "$l_str_ex" ] ;then
             # starting with numbers and letters
@@ -673,10 +673,10 @@ function fn_prepare()
 LOCK_FILE="/var/run/make_hotpatch.lock"
 # define the lock value
 LOCK_FD=200
- 
+
 # get the pid
 make_hotpatch_pid=$$
- 
+
 if [ -e "$LOCK_FILE" ]; then
     lock_pid=$(cat "$LOCK_FILE")
     # check if the lock process is running
@@ -689,20 +689,27 @@ if [ -e "$LOCK_FILE" ]; then
         exit 1
     fi
 fi
- 
+
 # trap exception exit and delete lock file
 trap 'rm -f "$LOCK_FILE"' EXIT TERM INT
- 
+
 # binding the lock value to Lock File
 exec {LOCK_FD}> "$LOCK_FILE"
 echo $$ > "$LOCK_FILE"
- 
+
 # obtaining a Lock in Non-Block Mode
 if ! flock -n $LOCK_FD; then
     echo "[$0] Someone is making, please try again later."
     exit 1
 fi
 
+echo "The pid of make_hotpatch is: $make_hotpatch_pid"
+
 fn_prepare
 fn_main $@
-exit $?
+main_exit_code=$?
+
+# remove lock file
+rm -f "$LOCK_FILE"
+
+exit $main_exit_code