path: root/mm
diff options
authorChristoph Lameter <clameter@sgi.com>2007-08-31 00:12:08 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-08-31 01:42:23 -0700
commit3b42d28b2a04b3c9830eb865288239d45eccc402 (patch)
tree776a297ef8bd8a879da74290543907014abe6198 /mm
parentdec4ad86c2fbea062e9ef9caa6d6e79f7c5e0b12 (diff)
Page migration: Do not accept invalid nodes in the target nodeset
Page migration currently does not check if the target of the move contains nodes that that are invalid (if root attempts to migrate pages) and may try to allocate from invalid nodes if these are specified leading to oopses. Return -EINVAL if an offline node is specified. Signed-off-by: Christoph Lameter <clameter@sgi.com> Cc: Shaohua Li <shaohua.li@intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
1 files changed, 5 insertions, 0 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 172abffeb2e..bb54b88c3d5 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -955,6 +955,11 @@ asmlinkage long sys_migrate_pages(pid_t pid, unsigned long maxnode,
goto out;
+ if (!nodes_subset(new, node_online_map)) {
+ err = -EINVAL;
+ goto out;
+ }
err = security_task_movememory(task);
if (err)
goto out;