aboutsummaryrefslogtreecommitdiffstats
path: root/net
diff options
context:
space:
mode:
authorHenry C Chang <henry_c_chang@tcloudcomputing.com>2010-12-17 12:55:59 -0500
committerSage Weil <sage@newdream.net>2010-12-17 12:55:59 -0500
commit361cf40519a491f68b28ad90225e4611c4bf8e12 (patch)
treeac0a77f2d6b36d4140bbaf3b8c14a37e8ae1ef11 /net
parentb6aa5901c7a2bd90d0b6b9866300d2648b2568f3 (diff)
ceph: handle partial result from get_user_pages
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@tcloudcomputing.com> Signed-off-by: Sage Weil <sage@newdream.net>
Diffstat (limited to 'net')
-rw-r--r--net/ceph/pagevec.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/ceph/pagevec.c b/net/ceph/pagevec.c
index 01947a5d03b7..1a040e64c69f 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,
26 rc = get_user_pages(current, current->mm, (unsigned long)data, 26 rc = get_user_pages(current, current->mm, (unsigned long)data,
27 num_pages, write_page, 0, pages, NULL); 27 num_pages, write_page, 0, pages, NULL);
28 up_read(&current->mm->mmap_sem); 28 up_read(&current->mm->mmap_sem);
29 if (rc < 0) 29 if (rc < num_pages)
30 goto fail; 30 goto fail;
31 return pages; 31 return pages;
32 32
33fail: 33fail:
34 kfree(pages); 34 ceph_put_page_vector(pages, rc > 0 ? rc : 0, false);
35 return ERR_PTR(rc); 35 return ERR_PTR(rc);
36} 36}
37EXPORT_SYMBOL(ceph_get_direct_page_vector); 37EXPORT_SYMBOL(ceph_get_direct_page_vector);