Linux Kernel https://git.stealer.net/cgit.cgi/user/sven/linux.git/atom?h=v3.0.9 2009-04-01T15:59:13Z 2009-04-01T15:59:13Z Akinobu Mita akinobu.mita@gmail.com 2009-03-31T22:23:17Z urn:sha1:6a11f75b6a17b5d9ac5025f8d048382fd1f47377 CONFIG_DEBUG_PAGEALLOC is now supported by x86, powerpc, sparc64, and s390. This patch implements it for the rest of the architectures by filling the pages with poison byte patterns after free_pages() and verifying the poison patterns before alloc_pages(). This generic one cannot detect invalid page accesses immediately but invalid read access may cause invalid dereference by poisoned memory and invalid write access can be detected after a long delay. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>