diff --git a/components/debugtools/los_hwidump.c b/components/debugtools/los_hwidump.c
index 2c60058c..d72edc40 100644
--- a/components/debugtools/los_hwidump.c
+++ b/components/debugtools/los_hwidump.c
@@ -84,7 +84,7 @@ STATIC VOID ShellCmdHwiInfoShow(OsIrqCpupCB *irqData, CPUP_INFO_S *hwiCpup1s,
         }
         irqName = OsGetHwiFormName(i);
 
-        PRINTK(" %10u:%11u%11llu%10llu%9u.%-2u%9u.%-2u %-12s\n", i - OS_SYS_VECTOR_CNT, count, cycles, timeMax,
+        PRINTK(" %10d:%11u%11llu%10llu%9u.%-2u%9u.%-2u %-12s\n", i - OS_SYS_VECTOR_CNT, count, cycles, timeMax,
                hwiCpup1s[i].uwUsage / CPUP_PRECISION_MULT, hwiCpup1s[i].uwUsage % CPUP_PRECISION_MULT,
                hwiCpup10s[i].uwUsage / CPUP_PRECISION_MULT, hwiCpup10s[i].uwUsage % CPUP_PRECISION_MULT,
                (irqName != NULL) ? irqName : NULL);
diff --git a/components/debugtools/los_schedtrace.c b/components/debugtools/los_schedtrace.c
index 7de17e59..c6f1462b 100644
--- a/components/debugtools/los_schedtrace.c
+++ b/components/debugtools/los_schedtrace.c
@@ -126,8 +126,10 @@ VOID LOS_SchedTraceStop(VOID)
     ShowFormat(g_traceRingBuf, g_schedCount);
     g_schedCount = 0;
 
-    (VOID)LOS_MemFree(OS_SYS_MEM_ADDR, g_traceRingBuf);
-    g_traceRingBuf = NULL;
+    if (g_traceRingBuf != NULL) {
+        (VOID)LOS_MemFree(OS_SYS_MEM_ADDR, g_traceRingBuf);
+        g_traceRingBuf = NULL;
+    }
 
     return;
 }