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Message-ID: <20210630082724.50838-13-wuguanghao3@huawei.com> Date: Wed, 30 Jun 2021 16:27:24 +0800 From: wuguanghao <wuguanghao3@...wei.com> To: <linux-ext4@...r.kernel.org>, <artem.blagodarenko@...il.com> CC: <liuzhiqiang26@...wei.com>, <linfeilong@...wei.com>, <wuguanghao3@...wei.com> Subject: [PATCH v2 12/12] ext2ed: fix potential NULL pointer dereference in dupstr() From: Zhiqiang Liu <liuzhiqiang26@...wei.com> In dupstr(), we should check return value of malloc(). Signed-off-by: Zhiqiang Liu <liuzhiqiang26@...wei.com> Signed-off-by: Wu Guanghao <wuguanghao3@...wei.com> Reviewed-by: Wu Bo <wubo40@...wei.com> --- ext2ed/main.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/ext2ed/main.c b/ext2ed/main.c index f7e7d7df..9d33a8e1 100644 --- a/ext2ed/main.c +++ b/ext2ed/main.c @@ -524,6 +524,8 @@ char *dupstr (char *src) char *ptr; ptr=(char *) malloc (strlen (src)+1); + if (!ptr) + return NULL; strcpy (ptr,src); return (ptr); } -- 2.19.1
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