From: Liu Xiang <liu.xiang@zlingsmart.com> mainline inclusion from mainline-v5.11-rc1 commit 0a4f3d1bb91cac4efdd780373638b6a1a4c24c51 category: bugfix bugzilla: NA CVE: NA ----------------------------------------------- On 64-bit machine, delta variable in hugetlb_acct_memory() may be larger than 0xffffffff, but gather_surplus_pages() can only use the low 32-bit value now. So we need to fix type of delta parameter and related local variables in gather_surplus_pages(). Link: https://lkml.kernel.org/r/1605793733-3573-1-git-send-email-liu.xiang@zlingsm... Reported-by: Ma Chenggong <ma.chenggong@zlingsmart.com> Signed-off-by: Liu Xiang <liu.xiang@zlingsmart.com> Signed-off-by: Pan Jiagen <pan.jiagen@zlingsmart.com> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com> Cc: Liu Xiang <liuxiang_1999@126.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> conflict: mm/hugetlb.c Signed-off-by: Tong Tiangen <tongtiangen@huawei.com> Reviewed-by: Chen Wandun <chenwandun@huawei.com> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> --- mm/hugetlb.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 8ab6a9903ec9a..bac44fb7593df 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1820,12 +1820,13 @@ struct page *alloc_huge_page_vma(struct hstate *h, struct vm_area_struct *vma, * Increase the hugetlb pool such that it can accommodate a reservation * of size 'delta'. */ -static int gather_surplus_pages(struct hstate *h, int delta) +static int gather_surplus_pages(struct hstate *h, long delta) { struct list_head surplus_list; struct page *page, *tmp; - int ret, i; - int needed, allocated; + int ret; + long i; + long needed, allocated; bool alloc_ok = true; needed = (h->resv_huge_pages + delta) - h->free_huge_pages; -- 2.25.1