Casting the node returned by rtems_chain_head is incorrect. That node is
owned by the control structure and use of it post-cast could cause
memory corruption.
---
c-user/chains.rst | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/c-user/chains.rst b/c-user/chains.rst
index f518ef4..2044966 100644
--- a/c-user/chains.rst
+++ b/c-user/chains.rst
@@ -193,10 +193,14 @@ placed on another chain:
rtems_chain_initialize_empty (out);
node = rtems_chain_head (chain);
+
+ /* The node returned by rtems_chain_head() is owned by the chain */
+ node = rtems_chain_next(node);
+
while (!rtems_chain_is_tail (chain, node))
{
bar = (foo*) node;
- rtems_chain_node* next_node = node->next;
+ rtems_chain_node* next_node = rtems_chain_next(node);
if (strcmp (match, bar->data) == 0)
{
rtems_chain_extract (node);
--
2.30.2
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