On Tue, 2010-02-02 at 13:36 +0300, Dmitry Monakhov wrote: > After page was truncated it lost it's mapping, this result in null > pointer dereference on bdi_stat update. In fact we have to decrement > bdi_stat even for truncated pages, so let's pass correct mapping in > function arguments. Patch against linux-2.6 > ##TEST_CASE > /* > Tast case for bug in nfs_clear_request_commit() > caused by null pointer dereference in case of truncated page. > It takes less than 10 minutes to reproduce the bug. Something is wrong here. nfs_release_page() returns '0' if the page has an associated write request (i.e. PagePrivate is set), and so both invalidate_complete_page() and invalidate_complete_page2() will fail. So what is truncating the page? Trond -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
