Messages in this thread Patch in this message | | | From | "Kirill A. Shutemov" <> | Subject | [RFCv2 09/13] shmem: Fail shmem_getpage_gfp() on poisoned pages | Date | Fri, 16 Apr 2021 18:41:02 +0300 |
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Forbid access to poisoned pages.
TODO: Probably more fine-grained approach is needed. It shuld be a allowed to fault-in these pages as hwpoison entries.
Not-Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> --- mm/shmem.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/mm/shmem.c b/mm/shmem.c index 7c6b6d8f6c39..d29a0c9be19c 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -1832,6 +1832,13 @@ static int shmem_getpage_gfp(struct inode *inode, pgoff_t index, if (page) hindex = page->index; + + if (page && PageHWPoison(page)) { + unlock_page(page); + put_page(page); + return -EIO; + } + if (page && sgp == SGP_WRITE) mark_page_accessed(page); -- 2.26.3
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