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| author | Insu Yun <wuninsu@gmail.com> | 2016-02-12 01:15:59 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-02-25 11:57:46 -0800 |
| commit | 819f428a70930100319b7e30716e467c6a183737 (patch) | |
| tree | e187943e4665808579cdfad9681c8fb333493daf /fs/ext4 | |
| parent | ff19ac8fb71e8a2bf07d61b959062998139c1104 (diff) | |
| download | lwn-819f428a70930100319b7e30716e467c6a183737.tar.gz lwn-819f428a70930100319b7e30716e467c6a183737.zip | |
ext4: fix potential integer overflow
commit 46901760b46064964b41015d00c140c83aa05bcf upstream.
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>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/ext4')
| -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 fa7d2e668c3a..cf0a70486618 100644 --- a/fs/ext4/resize.c +++ b/fs/ext4/resize.c @@ -181,7 +181,7 @@ 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; |