3.2.56-rc1 review patch. If anyone has any objections, please let me know.
------------------ From: Jianguo Wu <[email protected]> commit 98398c32f6687ee1e1f3ae084effb4b75adb0747 upstream. In __page_check_address(), if address's pud is not present, huge_pte_offset() will return NULL, we should check the return value. Signed-off-by: Jianguo Wu <[email protected]> Cc: Naoya Horiguchi <[email protected]> Cc: Mel Gorman <[email protected]> Cc: qiuxishi <[email protected]> Cc: Hanjun Guo <[email protected]> Acked-by: Kirill A. Shutemov <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]> [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings <[email protected]> --- mm/rmap.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/mm/rmap.c +++ b/mm/rmap.c @@ -581,7 +581,11 @@ pte_t *__page_check_address(struct page spinlock_t *ptl; if (unlikely(PageHuge(page))) { + /* when pud is not present, pte will be NULL */ pte = huge_pte_offset(mm, address); + if (!pte) + return NULL; + ptl = &mm->page_table_lock; goto check; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
