diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 48c4b963e809..f86b3b7df742 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -1269,9 +1269,14 @@ int machines__create_guest_kernel_maps(struct machines *machines)
 				free(namelist[i]);
 				continue;
 			}
-			snprintf(path, sizeof(path), "%s/%s/proc/kallsyms",
-				 symbol_conf.guestmount,
-				 namelist[i]->d_name);
+			if (snprintf(path, sizeof(path), "%s/%s/proc/kallsyms",
+				     symbol_conf.guestmount,
+				     namelist[i]->d_name) >= (int)sizeof(path)) {
+				pr_debug("Guest kallsyms path too long for %s. Skipping.\n",
+					 namelist[i]->d_name);
+				free(namelist[i]);
+				continue;
+			}
 			if (access(path, R_OK)) {
 				pr_debug("Can't access file %s\n", path);
 				free(namelist[i]);