[PATCH 1/2] tracing: Fix memory leak on failure path in ftrace_allocate_pages()

[Namhyung Kim]

As struct ftrace_page is managed in a single linked list, it should
free from the start page.

Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
---
 kernel/trace/ftrace.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 5b372e3ed675..ddfda763ded7 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -2398,7 +2398,8 @@ ftrace_allocate_pages(unsigned long num_to_init)
 	return start_pg;
 
  free_pages:
-	while (start_pg) {
+	pg = start_pg;
+	while (pg) {
 		order = get_count_order(pg->size / ENTRIES_PER_PAGE);
 		free_pages((unsigned long)pg->records, order);
 		start_pg = pg->next;
-- 
2.0.0

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