tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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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>

authored by

Christoph Lameter and committed by
Linus Torvalds 3b42d28b dec4ad86

+5
+5
mm/mempolicy.c
··· 955 955 goto out; 956 956 } 957 957 958 + if (!nodes_subset(new, node_online_map)) { 959 + err = -EINVAL; 960 + goto out; 961 + } 962 + 958 963 err = security_task_movememory(task); 959 964 if (err) 960 965 goto out;