diff --git a/mm/slub.c b/mm/slub.c
index 749588a..a2cd47d 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -3597,7 +3597,7 @@
 	for (i = 0; i < t.count; i++) {
 		struct location *l = &t.loc[i];
 
-		if (len > PAGE_SIZE - 100)
+		if (len > PAGE_SIZE - KSYM_SYMBOL_LEN - 100)
 			break;
 		len += sprintf(buf + len, "%7ld ", l->count);
 
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index f3f6e07..1ddb77b 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1717,7 +1717,7 @@
 		v->addr, v->addr + v->size, v->size);
 
 	if (v->caller) {
-		char buff[2 * KSYM_NAME_LEN];
+		char buff[KSYM_SYMBOL_LEN];
 
 		seq_putc(m, ' ');
 		sprint_symbol(buff, (unsigned long)v->caller);