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| author | Toshi Kani <toshi.kani@hpe.com> | 2018-03-13 11:03:46 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-03-21 12:05:43 +0100 |
| commit | d7d57946c5f5474aa8a76ef3f9adaf13d9128be7 (patch) | |
| tree | bdec9137deeda45a775032b9d8b8a4c6f615028c /arch | |
| parent | 4abf8650d69379773ba9d03cc263507a1461b985 (diff) | |
| download | linux-stable-d7d57946c5f5474aa8a76ef3f9adaf13d9128be7.tar.gz linux-stable-d7d57946c5f5474aa8a76ef3f9adaf13d9128be7.tar.bz2 linux-stable-d7d57946c5f5474aa8a76ef3f9adaf13d9128be7.zip | |
x86/mm: Fix vmalloc_fault to use pXd_large
commit 18a955219bf7d9008ce480d4451b6b8bf4483a22 upstream.
Gratian Crisan reported that vmalloc_fault() crashes when CONFIG_HUGETLBFS
is not set since the function inadvertently uses pXn_huge(), which always
return 0 in this case. ioremap() does not depend on CONFIG_HUGETLBFS.
Fix vmalloc_fault() to call pXd_large() instead.
Fixes: f4eafd8bcd52 ("x86/mm: Fix vmalloc_fault() to handle large pages properly")
Reported-by: Gratian Crisan <gratian.crisan@ni.com>
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Cc: linux-mm@kvack.org
Cc: Borislav Petkov <bp@alien8.de>
Cc: Andy Lutomirski <luto@kernel.org>
Link: https://lkml.kernel.org/r/20180313170347.3829-2-toshi.kani@hpe.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/mm/fault.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index c88573d90f3e..25a30b5d6582 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -330,7 +330,7 @@ static noinline int vmalloc_fault(unsigned long address) if (!pmd_k) return -1; - if (pmd_huge(*pmd_k)) + if (pmd_large(*pmd_k)) return 0; pte_k = pte_offset_kernel(pmd_k, address); @@ -475,7 +475,7 @@ static noinline int vmalloc_fault(unsigned long address) if (pud_none(*pud) || pud_pfn(*pud) != pud_pfn(*pud_ref)) BUG(); - if (pud_huge(*pud)) + if (pud_large(*pud)) return 0; pmd = pmd_offset(pud, address); @@ -486,7 +486,7 @@ static noinline int vmalloc_fault(unsigned long address) if (pmd_none(*pmd) || pmd_pfn(*pmd) != pmd_pfn(*pmd_ref)) BUG(); - if (pmd_huge(*pmd)) + if (pmd_large(*pmd)) return 0; pte_ref = pte_offset_kernel(pmd_ref, address); |