| From | Jiri Slaby <> | Subject | [PATCH 3.12 085/142] ext4: fix potential integer overflow | Date | Wed, 24 Feb 2016 11:04:40 +0100 |
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From: Insu Yun <wuninsu@gmail.com>
3.12-stable review patch. If anyone has any objections, please let me know.
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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: Jiri Slaby <jslaby@suse.cz> --- 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 831cb305c63f..ae8ce49c0437 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; -- 2.7.1
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