diff --git a/osal/android/os_mem.c b/osal/android/os_mem.c
index 19f648f6..bd747acd 100644
--- a/osal/android/os_mem.c
+++ b/osal/android/os_mem.c
@@ -22,6 +22,13 @@ int os_malloc(void **memptr, size_t alignment, size_t size)
     return posix_memalign(memptr, alignment, size);
 }
 
+int os_realloc(void *src, void **dst, size_t alignment, size_t size)
+{
+    (void)alignment;
+    *dst = realloc(src, size);
+    return (*dst) ? (0) : (-1);
+}
+
 void os_free(void *ptr)
 {
     free(ptr);
diff --git a/osal/inc/mpp_mem.h b/osal/inc/mpp_mem.h
index 5bca3f66..a3fd815e 100644
--- a/osal/inc/mpp_mem.h
+++ b/osal/inc/mpp_mem.h
@@ -27,6 +27,9 @@
 #define mpp_malloc(type, count)  \
     (type*)mpp_osal_malloc(MODULE_TAG, sizeof(type) * (count))
 
+#define mpp_realloc(ptr, type, count) \
+    (type*)mpp_osal_realloc(MODULE_TAG, ptr, sizeof(type) * (count))
+
 #define mpp_free(ptr) mpp_osal_free(ptr)
 
 #ifdef __cplusplus
@@ -35,6 +38,7 @@ extern "C" {
 
 void mpp_show_mem_status();
 void *mpp_osal_malloc(char *tag, size_t size);
+void *mpp_osal_realloc(char *tag, void *ptr, size_t size);
 void mpp_osal_free(void *ptr);
 
 #ifdef __cplusplus
diff --git a/osal/mpp_log.cpp b/osal/mpp_log.cpp
index d549064d..05bc7177 100644
--- a/osal/mpp_log.cpp
+++ b/osal/mpp_log.cpp
@@ -53,7 +53,7 @@ void _mpp_log(const char *tag, const char *fmt, ...)
     } else if (len == MPP_LOG_MAX_LEN) {
         buf = msg_log_warning;
     } else if (fmt[len - 1] != '\n') {
-        char msg[MPP_LOG_MAX_LEN];
+        char msg[MPP_LOG_MAX_LEN+1];
         snprintf(msg, sizeof(msg), "%s", fmt);
         msg[len]    = '\n';
         msg[len + 1]  = '\0';
@@ -79,7 +79,7 @@ void _mpp_err(const char *tag, const char *fmt, ...)
     } else if (len == MPP_LOG_MAX_LEN) {
         buf = msg_log_warning;
     } else if (fmt[len - 1] != '\n') {
-        char msg[MPP_LOG_MAX_LEN];
+        char msg[MPP_LOG_MAX_LEN+1];
         snprintf(msg, sizeof(msg), "%s", fmt);
         msg[len]    = '\n';
         msg[len + 1]  = '\0';
diff --git a/osal/mpp_mem.cpp b/osal/mpp_mem.cpp
index dbbec435..366955b5 100644
--- a/osal/mpp_mem.cpp
+++ b/osal/mpp_mem.cpp
@@ -89,6 +89,44 @@ void *mpp_osal_malloc(char *tag, size_t size)
         return NULL;
 }
 
+void *mpp_osal_realloc(char *tag, void *ptr, size_t size)
+{
+    void *ret;
+
+    if (NULL == ptr)
+        return mpp_osal_malloc(tag, size);
+
+    if (0 == size)
+        return NULL;
+
+    get_osal_mem_flag();
+
+    if (osal_mem_flag & OSAL_MEM_LIST_EN) {
+        struct mem_node *pos, *n;
+        ret = NULL;
+        list_for_each_entry_safe(pos, n, &mem_list, struct mem_node, list) {
+            if (ptr == pos->ptr) {
+                if (MPP_OK == os_realloc(ptr, &pos->ptr, RK_OSAL_MEM_ALIGN, size)) {
+                    pos->size   = size;
+                    strncpy(pos->tag, tag, sizeof(pos->tag));
+                    ret = pos->ptr;
+                } else {
+                    list_del_init(&pos->list);
+                    free(pos);
+                }
+                break;
+            }
+        }
+    } else {
+        ret = realloc(ptr, size);
+    }
+
+    if (NULL == ret)
+        mpp_err("mpp_realloc ptr 0x%p to size %d failed\n", ptr, size);
+
+    return ret;
+}
+
 void mpp_osal_free(void *ptr)
 {
     if (NULL == ptr)
diff --git a/osal/os_malloc.h b/osal/os_malloc.h
index 813a85e0..8c0ef8a6 100644
--- a/osal/os_malloc.h
+++ b/osal/os_malloc.h
@@ -22,6 +22,7 @@ extern "C" {
 #endif
 
 int os_malloc(void **memptr, size_t alignment, size_t size);
+int os_realloc(void *src, void **dst, size_t alignment, size_t size);
 void os_free(void *ptr);
 
 #ifdef __cplusplus
diff --git a/osal/test/mpp_mem_test.c b/osal/test/mpp_mem_test.c
index ed46256f..27fc2c33 100644
--- a/osal/test/mpp_mem_test.c
+++ b/osal/test/mpp_mem_test.c
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-#define MODULE_TAG "mpp_malloc_test"
+#define MODULE_TAG "mpp_mem_test"
 
 #include "mpp_log.h"
 #include "mpp_env.h"
@@ -29,11 +29,20 @@ int main()
     mpp_set_env_u32("osal_mem_list", 1);
     tmp = mpp_malloc(int, 100);
     if (tmp) {
-        mpp_log("malloc success\n");
-        mpp_free(tmp);
+        mpp_log("malloc  success ptr 0x%p\n", tmp);
     } else {
-        mpp_log("malloc failed\n");
+        mpp_log("malloc  failed\n");
     }
+    if (tmp) {
+        tmp = mpp_realloc(tmp, int, 200);
+        if (tmp) {
+            mpp_log("realloc success ptr 0x%p\n", tmp);
+        } else {
+            mpp_log("realloc failed\n");
+        }
+    }
+    mpp_free(tmp);
+    mpp_log("mpp_mem_test done\n");
 
     return 0;
 }
diff --git a/osal/window/os_mem.c b/osal/window/os_mem.c
index d47076f5..6301f13f 100644
--- a/osal/window/os_mem.c
+++ b/osal/window/os_mem.c
@@ -23,6 +23,12 @@ int os_malloc(void **memptr, size_t alignment, size_t size)
     return (*memptr) ? (0) : (-1);
 }
 
+int os_realloc(void *src, void **dst, size_t alignment, size_t size)
+{
+    *dst = _aligned_realloc(src, size, alignment);
+    return (*dst) ? (0) : (-1);
+}
+
 void os_free(void *ptr)
 {
     _aligned_free(ptr);