The patch titled Subject: hugetlb: fix memoryleak in hugetlb_mcopy_atomic_pte has been added to the -mm mm-hotfixes-unstable branch. Its filename is hugetlb-fix-memoryleak-in-hugetlb_mcopy_atomic_pte.patch

This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches...

This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------ From: Miaohe Lin linmiaohe@huawei.com Subject: hugetlb: fix memoryleak in hugetlb_mcopy_atomic_pte Date: Sat, 9 Jul 2022 17:26:29 +0800

When alloc_huge_page fails, *pagep is set to NULL without put_page first. So the hugepage indicated by *pagep is leaked.

Link: https://lkml.kernel.org/r/20220709092629.54291-1-linmiaohe@huawei.com Fixes: 8cc5fcbb5be8 ("mm, hugetlb: fix racy resv_huge_pages underflow on UFFDIO_COPY") Signed-off-by: Miaohe Lin linmiaohe@huawei.com Acked-by: Muchun Song songmuchun@bytedance.com Cc: Mike Kravetz mike.kravetz@oracle.com Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

mm/hugetlb.c | 1 + 1 file changed, 1 insertion(+)

--- a/mm/hugetlb.c~hugetlb-fix-memoryleak-in-hugetlb_mcopy_atomic_pte +++ a/mm/hugetlb.c @@ -5952,6 +5952,7 @@ int hugetlb_mcopy_atomic_pte(struct mm_s

page = alloc_huge_page(dst_vma, dst_addr, 0); if (IS_ERR(page)) { + put_page(*pagep); ret = -ENOMEM; *pagep = NULL; goto out; _

Patches currently in -mm which might be from linmiaohe@huawei.com are

hugetlb-fix-memoryleak-in-hugetlb_mcopy_atomic_pte.patch mm-page_alloc-minor-clean-up-for-memmap_init_compound.patch mm-mmapc-fix-missing-call-to-vm_unacct_memory-in-mmap_region.patch filemap-minor-cleanup-for-filemap_write_and_wait_range.patch mm-huge_memory-use-flush_pmd_tlb_range-in-move_huge_pmd.patch mm-huge_memory-access-vm_page_prot-with-read_once-in-remove_migration_pmd.patch mm-huge_memory-fix-comment-of-__pud_trans_huge_lock.patch mm-huge_memory-use-helper-touch_pud-in-huge_pud_set_accessed.patch mm-huge_memory-use-helper-touch_pmd-in-huge_pmd_set_accessed.patch mm-huge_memory-rename-mmun_start-to-haddr-in-remove_migration_pmd.patch mm-huge_memory-use-helper-function-vma_lookup-in-split_huge_pages_pid.patch mm-huge_memory-use-helper-macro-__attr_rw.patch mm-huge_memory-fix-comment-in-zap_huge_pud.patch mm-huge_memory-check-pmd_present-first-in-is_huge_zero_pmd.patch mm-huge_memory-try-to-free-subpage-in-swapcache-when-possible.patch mm-huge_memory-minor-cleanup-for-split_huge_pages_all.patch mm-huge_memory-fix-comment-of-page_deferred_list.patch mm-huge_memory-correct-comment-of-prep_transhuge_page.patch mm-huge_memory-comment-the-subtly-logic-in-__split_huge_pmd.patch mm-huge_memory-use-helper-macro-is_err_or_null-in-split_huge_pages_pid.patch