diff --git a/clamav-type-conversion.patch b/clamav-type-conversion.patch
new file mode 100644
index 0000000000000000000000000000000000000000..10ec3575620629ed6b2651adc9600493de907840
--- /dev/null
+++ b/clamav-type-conversion.patch
@@ -0,0 +1,57 @@
+From adcae42c2094096606a26976fb5829aa1ce5937b Mon Sep 17 00:00:00 2001
+From: caodongxia <315816521@qq.com>
+Date: Mon, 31 May 2021 16:43:12 +0800
+Subject: [PATCH] create patch
+
+---
+ libclamav/upx.c             | 6 +++---
+ libclammspack/mspack/cabd.c | 2 +-
+ 2 files changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/libclamav/upx.c b/libclamav/upx.c
+index 4663861..0e7b2c8 100644
+--- a/libclamav/upx.c
++++ b/libclamav/upx.c
+@@ -333,7 +333,7 @@ int upx_inflate2b(const char *src, uint32_t ssize, char *dst, uint32_t *dsize, u
+                 return -1;
+             if (backbytes & 0xff000000)
+                 return -1;
+-            backbytes <<= 8;
++            backbytes = (int32_t)((uint32_t)(backbytes) << 8);
+             backbytes += (unsigned char)(src[scur++]);
+             backbytes ^= 0xffffffff;
+ 
+@@ -425,7 +425,7 @@ int upx_inflate2d(const char *src, uint32_t ssize, char *dst, uint32_t *dsize, u
+                 return -1;
+             if (backbytes & 0xff000000)
+                 return -1;
+-            backbytes <<= 8;
++            backbytes = (int32_t)((uint32_t)(backbytes) << 8); 
+             backbytes += (unsigned char)(src[scur++]);
+             backbytes ^= 0xffffffff;
+ 
+@@ -517,7 +517,7 @@ int upx_inflate2e(const char *src, uint32_t ssize, char *dst, uint32_t *dsize, u
+                 return -1;
+             if (backbytes & 0xff000000)
+                 return -1;
+-            backbytes <<= 8;
++            backbytes = (int32_t)((uint32_t)(backbytes) << 8);
+             backbytes += (unsigned char)(src[scur++]);
+             backbytes ^= 0xffffffff;
+ 
+diff --git a/libclammspack/mspack/cabd.c b/libclammspack/mspack/cabd.c
+index 75ef277..4dffd6b 100644
+--- a/libclammspack/mspack/cabd.c
++++ b/libclammspack/mspack/cabd.c
+@@ -1398,7 +1398,7 @@ static unsigned int cabd_checksum(unsigned char *data, unsigned int bytes,
+   unsigned int len, ul = 0;
+ 
+   for (len = bytes >> 2; len--; data += 4) {
+-    cksum ^= ((data[0]) | (data[1]<<8) | (data[2]<<16) | (data[3]<<24));
++    cksum ^= ((data[0]) | ((unsigned int)(data[1])<<8) | ((unsigned int)(data[2])<<16) | ((unsigned int)(data[3])<<24));
+   }
+ 
+   switch (bytes & 3) {
+-- 
+2.27.0
+
diff --git a/clamav.spec b/clamav.spec
index 27a6b5678ea430f03ef14d877ab0c9ad5039d492..ec2ed21e386f896f5e94c4fac924886fee145fb6 100644
--- a/clamav.spec
+++ b/clamav.spec
@@ -1,7 +1,8 @@
 Name:           clamav
 Summary:        End-user tools for the Clam Antivirus scanner
 Version:        0.103.2
-Release:        1
+Release:        2
+
 License:        GPLv2 and Public Domain and bzip2-1.0.6 and Zlib and Apache-2.0
 URL:            https://www.clamav.net/
 Source0:        https://www.clamav.net/downloads/production/clamav-%{version}.tar.gz
@@ -26,6 +27,7 @@ Patch0003:      clamav-0.99-private.patch
 Patch0004:      clamav-check.patch
 Patch0005:      clamav-clamonacc-service.patch
 Patch0006:      clamav-freshclam.service.patch
+Patch0007:      clamav-type-conversion.patch
 
 BuildRequires:  autoconf automake gettext-devel libtool libtool-ltdl-devel
 BuildRequires:  gcc-c++ zlib-devel bzip2-devel gmp-devel curl-devel json-c-devel
@@ -410,6 +412,9 @@ test -e %_var/log/clamav-milter.log || {
 
 
 %changelog
+* Tue Jun 1 2021 caodongxia <caodongxia@huawei.com> - 0.103.2-2
+- fix left shift
+
 * Fri Apr 16 2021 wangyue <wangyue92@huawei.com> - 0.103.2-1
 - Upgrade to 0.103.2-1