From: Henry C Chang <henry_c_chang@xxxxxxxxxxxxxxxxxxx> The get_user_pages() helper can return fewer than the requested pages. Error out in that case, and clean up the partial result. Signed-off-by: Henry C Chang <henry_c_chang@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Sage Weil <sage@xxxxxxxxxxxx> --- net/ceph/pagevec.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/net/ceph/pagevec.c b/net/ceph/pagevec.c index 01947a5..1a040e6 100644 --- a/net/ceph/pagevec.c +++ b/net/ceph/pagevec.c @@ -26,12 +26,12 @@ struct page **ceph_get_direct_page_vector(const char __user *data, rc = get_user_pages(current, current->mm, (unsigned long)data, num_pages, write_page, 0, pages, NULL); up_read(¤t->mm->mmap_sem); - if (rc < 0) + if (rc < num_pages) goto fail; return pages; fail: - kfree(pages); + ceph_put_page_vector(pages, rc > 0 ? rc : 0, false); return ERR_PTR(rc); } EXPORT_SYMBOL(ceph_get_direct_page_vector); -- 1.6.6.1 -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
