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Message-Id: <1457391064-6660-153-git-send-email-kamal@canonical.com> Date: Mon, 7 Mar 2016 14:49:03 -0800 From: Kamal Mostafa <kamal@...onical.com> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org, kernel-team@...ts.ubuntu.com Cc: Insu Yun <wuninsu@...il.com>, Theodore Ts'o <tytso@....edu>, Kamal Mostafa <kamal@...onical.com> Subject: [PATCH 4.2.y-ckt 152/273] ext4: fix potential integer overflow 4.2.8-ckt5 -stable review patch. If anyone has any objections, please let me know. ---8<------------------------------------------------------------ From: Insu Yun <wuninsu@...il.com> 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@...il.com> Signed-off-by: Theodore Ts'o <tytso@....edu> Signed-off-by: Kamal Mostafa <kamal@...onical.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 c7c53fd..c9a514f 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; -- 2.7.0
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