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radix-tree: fix private list warnings 

The newly introduced warning in radix_tree_free_nodes() was testing the
wrong variable; it should have been 'old' instead of 'node'.

Fixes: ea07b862ac ("mm: workingset: fix use-after-free in shadow node shrinker")
Link: http://lkml.kernel.org/r/20170118163746.GA32495@cmpxchg.org
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Matthew Wilcox 2017-01-24 15:18:16 -08:00 committed by Linus Torvalds
parent bbd88e1d53
commit dd040b6f6d
1 changed files with 1 additions and 1 deletions
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lib/radix-tree.c
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@ -769,7 +769,7 @@ static void radix_tree_free_nodes(struct radix_tree_node *node)
struct radix_tree_node *old = child; struct radix_tree_node *old = child;
offset = child->offset + 1; offset = child->offset + 1;
child = child->parent; child = child->parent;
WARN_ON_ONCE(!list_empty(&node->private_list)); WARN_ON_ONCE(!list_empty(&old->private_list));
radix_tree_node_free(old); radix_tree_node_free(old);
if (old == entry_to_node(node)) if (old == entry_to_node(node))
return; return;