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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>
This commit is contained in:
Christoph Lameter 2007-08-31 00:12:08 -07:00 committed by Linus Torvalds
parent dec4ad86c2
commit 3b42d28b2a
1 changed files with 5 additions and 0 deletions
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5
mm/mempolicy.c
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@ -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;