linux-ext4 - [PATCH 09/12] lib/ss/error.c: check return value malloc in ss

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Date:   Mon, 24 May 2021 19:24:53 +0800
From:   Wu Guanghao <wuguanghao3@...wei.com>
To:     <linux-ext4@...r.kernel.org>
CC:     <liuzhiqiang26@...wei.com>, <linfeilong@...wei.com>
Subject: [PATCH 09/12] lib/ss/error.c: check return value malloc in ss_name()

In ss_name(), we should check return value of malloc(),
otherwise, it may cause a segmentation fault problem.

Signed-off-by: Zhiqiang Liu <liuzhiqiang26@...wei.com>
Signed-off-by: Wu Guanghao <wuguanghao3@...wei.com>
---
 lib/ss/error.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/ss/error.c b/lib/ss/error.c
index 8d345a9f..656b71be 100644
--- a/lib/ss/error.c
+++ b/lib/ss/error.c
@@ -42,6 +42,8 @@ char *ss_name(int sci_idx)
 			 (strlen(infop->subsystem_name)+
 			  strlen(infop->current_request)+
 			  4));
+	if (ret_val == (char *)NULL)
+		return ((char *)NULL);
 	cp = ret_val;
 	cp1 = infop->subsystem_name;
 	while (*cp1)
--