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From 4a92545b8711df405dc804236d66386780696ce1 Mon Sep 17 00:00:00 2001
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From: Zhiqiang Liu <liuzhiqiang26@huawei.com>
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Date: Wed, 30 Jun 2021 16:27:20 +0800
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Subject: [PATCH 31/46] misc: fix potential segmentation fault problem in
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scandir()
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Content-Type: text/plain
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In scandir(), temp_list[num_dent] is allocated by calling
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malloc(), we should check whether malloc() returns NULL before
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accessing temp_list[num_dent].
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Signed-off-by: Zhiqiang Liu <liuzhiqiang26@huawei.com>
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Signed-off-by: Wu Guanghao <wuguanghao3@huawei.com>
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Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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Signed-off-by: Lukas Czerner <lczerner@redhat.com>
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---
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misc/create_inode.c | 2 ++
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1 file changed, 2 insertions(+)
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diff --git a/misc/create_inode.c b/misc/create_inode.c
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index 6f8487b9..38f37beb 100644
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--- a/misc/create_inode.c
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+++ b/misc/create_inode.c
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@@ -752,6 +752,8 @@ static int scandir(const char *dir_name, struct dirent ***name_list,
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}
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// add the copy of dirent to the list
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temp_list[num_dent] = (struct dirent*)malloc((dent->d_reclen + 3) & ~3);
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+ if (!temp_list[num_dent])
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+ goto out;
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memcpy(temp_list[num_dent], dent, dent->d_reclen);
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num_dent++;
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}
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--
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2.35.1
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