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authorMatthew Wilcox <matthew.r.wilcox@intel.com>2016-02-02 16:57:57 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-02-03 08:28:43 -0800
commit12c9d70bd5056b3ae84746fca973c286f48384cc (patch)
treef6b95cb55c397b738b8509c03d895fa8e2bd6f21 /fs
parentc6400ba7e13a41539342f1b6e1f9e78419cb0148 (diff)
downloadlinux-12c9d70bd5056b3ae84746fca973c286f48384cc.tar.bz2
mm: fix memory leak in copy_huge_pmd()
We allocate a pgtable but do not attach it to anything if the PMD is in a DAX VMA, causing it to leak. We certainly try to not free pgtables associated with the huge zero page if the zero page is in a DAX VMA, so I think this is the right solution. This needs to be properly audited. Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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