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| author | Insu Yun <wuninsu@gmail.com> | 2016-02-12 01:15:59 -0500 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2016-03-04 10:18:41 -0500 |
| commit | a1bd518443ff68b7c75f534000164d23426f49a6 (patch) | |
| tree | 1be129dd3a1a812166f3e1b402fead7abfd453ef | |
| parent | 66620e96ab6fd3ed93eb260b39141c925cb30484 (diff) | |
| download | lwn-a1bd518443ff68b7c75f534000164d23426f49a6.tar.gz lwn-a1bd518443ff68b7c75f534000164d23426f49a6.zip | |
ext4: fix potential integer overflow
[ Upstream commit 46901760b46064964b41015d00c140c83aa05bcf ]
Since sizeof(ext_new_group_data) > sizeof(ext_new_flex_group_data),
integer overflow could be happened.
Therefore, need to fix integer overflow sanitization.
Cc: stable@vger.kernel.org
Signed-off-by: Insu Yun <wuninsu@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
| -rw-r--r-- | fs/ext4/resize.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c index ca4588388fc3..77c81c64a47e 100644 --- a/fs/ext4/resize.c +++ b/fs/ext4/resize.c @@ -186,7 +186,7 @@ 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; |