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| author | Ralf Baechle <ralf@linux-mips.org> | 2013-02-21 12:51:33 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2013-02-21 12:51:33 +0100 |
| commit | 8bfc245f9ad7bd4e461179e4e7852ef99b8b6144 (patch) | |
| tree | 0ad091f645fbc8318634599d278966a53d3922ee /mm/huge_memory.c | |
| parent | 612663a974065c3445e641d046769fe4c55a6438 (diff) | |
| parent | 535237cecab2b078114be712c67e89a0db61965f (diff) | |
| download | kernel_replicant_linux-8bfc245f9ad7bd4e461179e4e7852ef99b8b6144.tar.gz kernel_replicant_linux-8bfc245f9ad7bd4e461179e4e7852ef99b8b6144.tar.bz2 kernel_replicant_linux-8bfc245f9ad7bd4e461179e4e7852ef99b8b6144.zip | |
Merge branch 'mips-next-3.9' of git://git.linux-mips.org/pub/scm/john/linux-john into mips-for-linux-next
Diffstat (limited to 'mm/huge_memory.c')
| -rw-r--r-- | mm/huge_memory.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 6001ee6347a9..b5783d81eda9 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1257,6 +1257,10 @@ struct page *follow_trans_huge_pmd(struct vm_area_struct *vma, if (flags & FOLL_WRITE && !pmd_write(*pmd)) goto out; + /* Avoid dumping huge zero page */ + if ((flags & FOLL_DUMP) && is_huge_zero_pmd(*pmd)) + return ERR_PTR(-EFAULT); + page = pmd_page(*pmd); VM_BUG_ON(!PageHead(page)); if (flags & FOLL_TOUCH) { |