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- Avoid potential NULL dereference in huge_pte_alloc() on pmd_alloc()

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failure
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fix from Catalin Marinas:
 "Avoid potential NULL dereference in huge_pte_alloc() on pmd_alloc()
  failure"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: hugetlb: avoid potential NULL dereference
This commit is contained in:
Linus Torvalds 2020-05-07 09:55:58 -07:00
commit 6e7f2eacf0
1 changed files with 2 additions and 0 deletions
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2
arch/arm64/mm/hugetlbpage.c
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@ -230,6 +230,8 @@ pte_t *huge_pte_alloc(struct mm_struct *mm,
ptep = (pte_t *)pudp;
} else if (sz == (CONT_PTE_SIZE)) {
pmdp = pmd_alloc(mm, pudp, addr);
if (!pmdp)
return NULL;
WARN_ON(addr & (sz - 1));
/*