The patch titled
Subject: mm, hugetlb: fix a double unlock bug in alloc_surplus_huge_page()
has been added to the -mm tree. Its filename is
mm-hugetlb-further-simplify-hugetlb-allocation-api-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-hugetlb-further-simplify-hugetlb-allocation-api-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-hugetlb-further-simplify-hugetlb-allocation-api-fix.patch
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------------------------------------------------------
From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Subject: mm, hugetlb: fix a double unlock bug in alloc_surplus_huge_page()
We aren't holding the hugetlb_lock so there is no need to unlock.
Link: http://lkml.kernel.org/r/20180109200559.g3iz5kvbdrz7yydp@mwanda
Fixes: b27f11e5e675 ("mm, hugetlb: get rid of surplus page accounting tricks")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/hugetlb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/hugetlb.c~mm-hugetlb-further-simplify-hugetlb-allocation-api-fix mm/hugetlb.c
--- a/mm/hugetlb.c~mm-hugetlb-further-simplify-hugetlb-allocation-api-fix
+++ a/mm/hugetlb.c
@@ -1567,7 +1567,7 @@ static struct page *alloc_surplus_huge_p
page = alloc_fresh_huge_page(h, gfp_mask, nid, nmask);
if (!page)
- goto out_unlock;
+ return NULL;
spin_lock(&hugetlb_lock);
/*
_
Patches currently in -mm which might be from dan.carpenter@xxxxxxxxxx are
mm-hugetlb-further-simplify-hugetlb-allocation-api-fix.patch
ipc-mqueue-add-missing-error-code-in-init_mqueue_fs.patch
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