diff --git a/bugfix-fix-unsigned-integer-subtraction-sign-overflow.patch b/bugfix-fix-unsigned-integer-subtraction-sign-overflow.patch
new file mode 100644
index 0000000..e8d3969
--- /dev/null
+++ b/bugfix-fix-unsigned-integer-subtraction-sign-overflow.patch
@@ -0,0 +1,26 @@
+From 2a66a666d3e202dec5b1a4309447e32d5f292871 Mon Sep 17 00:00:00 2001
+From: liuchao173 <55137861+liuchao173@users.noreply.github.com>
+Date: Tue, 24 Aug 2021 20:50:18 +0800
+Subject: [PATCH] fix unsigned integer subtraction sign overflow
+
+Min_load, adjustment_load  and load are unsigned integers, so it overflows when (lb_info->min_load + info->load) < (lb_info->adjustment_load - info->load). The result will be greater than zero. Therefore the irq cannot be selected to rebalanced.
+---
+ irqlist.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/irqlist.c b/irqlist.c
+index 9ab321a..4dd4a83 100644
+--- a/irqlist.c
++++ b/irqlist.c
+@@ -97,7 +97,7 @@ static void move_candidate_irqs(struct irq_info *info, void *data)
+ 	}
+ 
+ 	/* If we can migrate an irq without swapping the imbalance do it. */
+-	if ((lb_info->min_load + info->load) - (lb_info->adjustment_load - info->load) < delta_load) {
++	if ((lb_info->min_load + info->load) < delta_load + (lb_info->adjustment_load - info->load)) {
+ 		lb_info->adjustment_load -= info->load;
+ 		lb_info->min_load += info->load;
+ 		if (lb_info->min_load > lb_info->adjustment_load) {
+-- 
+1.8.3.1
+
diff --git a/feature-add-new-irq-migrate-rule-to-avoid-high-cpu-i.patch b/feature-add-new-irq-migrate-rule-to-avoid-high-cpu-i.patch
index ae40242..974d579 100644
--- a/feature-add-new-irq-migrate-rule-to-avoid-high-cpu-i.patch
+++ b/feature-add-new-irq-migrate-rule-to-avoid-high-cpu-i.patch
@@ -8,7 +8,7 @@ the min_load after moving irq. However, we can accept that the delta load become
 ---
  irqbalance.c | 8 +++++++-
  irqbalance.h | 1 +
- irqlist.c    | 3 ++-
+ irqlist.c    | 6 ++++-
  3 files changed, 10 insertions(+), 2 deletions(-)
 
 diff --git a/irqbalance.c b/irqbalance.c
@@ -74,13 +74,16 @@ diff --git a/irqlist.c b/irqlist.c
 index 9ab321a..98a4224 100644
 --- a/irqlist.c
 +++ b/irqlist.c
-@@ -97,7 +97,8 @@ static void move_candidate_irqs(struct irq_info *info, void *data)
+@@ -97,7 +97,11 @@ static void move_candidate_irqs(struct irq_info *info, void *data)
  	}
  
  	/* If we can migrate an irq without swapping the imbalance do it. */
--	if ((lb_info->min_load + info->load) - (lb_info->adjustment_load - info->load) < delta_load) {
-+	if ((lb_info->min_load + info->load) - (lb_info->adjustment_load - info->load) < delta_load &&
-+		lb_info->adjustment_load > load_limit) {
+-	if ((lb_info->min_load + info->load) < delta_load + (lb_info->adjustment_load - info->load)) {
++	if ((lb_info->adjustment_load - info->load) > (lb_info->min_load + info->load)) {
++		lb_info->adjustment_load -= info->load;
++		lb_info->min_load += info->load;
++	} else if (delta_load && load_limit && (lb_info->adjustment_load > load_limit) &&
++		  (lb_info->min_load + info->load) < (lb_info->adjustment_load - info->load) + delta_load) {
  		lb_info->adjustment_load -= info->load;
  		lb_info->min_load += info->load;
  		if (lb_info->min_load > lb_info->adjustment_load) {
diff --git a/irqbalance.spec b/irqbalance.spec
index 342b1d0..3f46d80 100644
--- a/irqbalance.spec
+++ b/irqbalance.spec
@@ -1,7 +1,7 @@
 Summary:	A dynamic adaptive IRQ balancing daemon
 Name:		irqbalance
 Version:	1.8.0
-Release:	2
+Release:	3
 Epoch:		3
 License:	GPLv2
 Source0:	https://github.com/Irqbalance/irqbalance/archive/v%{version}.tar.gz#/irqbalance-%{version}.tar.gz
@@ -23,6 +23,8 @@ Requires:	numactl-libs
 
 %define _hardened_build 1
 
+Patch6000:	bugfix-fix-unsigned-integer-subtraction-sign-overflow.patch
+
 Patch9000:	feature-aarch64-add-the-regular-to-get-the-correct-i.patch
 Patch9001:	feature-add-new-user-irq-policy-config-rule.patch
 Patch9002:	feature-add-the-switch-of-printing-log.patch
@@ -119,6 +121,12 @@ fi
 /sbin/chkconfig --del %{name} >/dev/null 2>&1 || :
 
 %changelog
+* Wed Aug 25 2021 Liu Chao <liuchao173@huawei.com> - 3:1.8.0-3
+- Type:bugfix
+- ID:NA
+- SUG:restart
+- DESC:fix unsigned integer subtraction sign overflow
+
 * Tue Aug 24 2021 Liu Chao <liuchao173@huawei.com> - 3:1.8.0-2
 - Type:bugfix
 - ID:NA