From: Insu Yun <wuninsu@gmail.com>
To: tytso@mit.edu, adilger.kernel@dilger.ca,
linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: taesoo@gatech.edu, yeongjin.jang@gatech.edu, insu@gatech.edu,
changwoo@gatech.edu, Insu Yun <wuninsu@gmail.com>
Subject: [PATCH] ext4: fix potential integer overflow
Date: Wed, 20 Jan 2016 11:18:08 -0500 [thread overview]
Message-ID: <1453306688-5528-1-git-send-email-wuninsu@gmail.com> (raw)
Since sizeof(ext_new_group_data) > sizeof(ext_new_flex_group_data),
integer overflow could be happened.
Therefore, need to fix integer overflow sanitization.
Signed-off-by: Insu Yun <wuninsu@gmail.com>
---
fs/ext4/resize.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index ad62d7a..34038e3 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -198,7 +198,7 @@ static struct ext4_new_flex_group_data *alloc_flex_gd(unsigned long flexbg_size)
if (flex_gd == NULL)
goto out3;
- if (flexbg_size >= UINT_MAX / sizeof(struct ext4_new_flex_group_data))
+ if (flexbg_size >= UINT_MAX / sizeof(struct ext4_new_group_data))
goto out2;
flex_gd->count = flexbg_size;
--
1.9.1
next reply other threads:[~2016-01-20 16:16 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-20 16:18 Insu Yun [this message]
2016-02-12 6:16 ` Theodore Ts'o
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