From 522883505d3b02e3294f045f49007b61c00e2c31 Mon Sep 17 00:00:00 2001
From: Chao Liu <liuchao173@huawei.com>
Date: Wed, 8 Jun 2022 10:04:02 +0800
Subject: [PATCH] check whether savedptr is NULL before invoking strlen

savedptr can be null in musl libc, so the strlen(NULL) will segfault

Signed-off-by: Chao Liu <liuchao173@huawei.com>
---
 procinterrupts.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/procinterrupts.c b/procinterrupts.c
index 9015177..57c8801 100644
--- a/procinterrupts.c
+++ b/procinterrupts.c
@@ -178,7 +178,7 @@ void init_irq_class_and_type(char *savedline, struct irq_info *info, int irq)
 	}
 
 #ifdef AARCH64
-	if (strlen(savedptr) > 0) {
+	if (savedptr && strlen(savedptr) > 0) {
 		snprintf(irq_fullname, PATH_MAX, "%s %s", last_token, savedptr);
 		tmp = strchr(irq_fullname, '\n');
 		if (tmp)