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authorFan Yang <Fan_Yang@sjtu.edu.cn>2020-06-04 18:22:07 +0800
committerLinus Torvalds <torvalds@linux-foundation.org>2020-06-04 19:05:24 -0700
commit5bfea2d9b17f1034a68147a8b03b9789af5700f9 (patch)
treeedad86fc86a98a8f13c4ebd1c4cdc3beb2114435 /fs/aio.c
parent15a2bc4dbb9cfed1c661a657fcb10798150b7598 (diff)
mm: Fix mremap not considering huge pmd devmap
The original code in mm/mremap.c checks huge pmd by: if (is_swap_pmd(*old_pmd) || pmd_trans_huge(*old_pmd)) { However, a DAX mapped nvdimm is mapped as huge page (by default) but it is not transparent huge page (_PAGE_PSE | PAGE_DEVMAP). This commit changes the condition to include the case. This addresses CVE-2020-10757. Fixes: 5c7fb56e5e3f ("mm, dax: dax-pmd vs thp-pmd vs hugetlbfs-pmd") Cc: <stable@vger.kernel.org> Reported-by: Fan Yang <Fan_Yang@sjtu.edu.cn> Signed-off-by: Fan Yang <Fan_Yang@sjtu.edu.cn> Tested-by: Fan Yang <Fan_Yang@sjtu.edu.cn> Tested-by: Dan Williams <dan.j.williams@intel.com> Reviewed-by: Dan Williams <dan.j.williams@intel.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/aio.c')
0 files changed, 0 insertions, 0 deletions