[PATCH] perf intel-bts: Free the old snapshot reference array after growing it

[lirongqing]

From: Li RongQing <lirongqing@xxxxxxxxx>

The snapshot reference array grows when a mapping index exceeds its
capacity. Its old entries are copied into a new allocation, but the old
array is abandoned when snapshot_refs is replaced.

Release the old array after copying it so expanding past sixteen
mappings does not leak it.

Fixes: d0170af7004d ("perf tools: Add Intel BTS support")
Signed-off-by: Li RongQing <lirongqing@xxxxxxxxx>
---
 tools/perf/arch/x86/util/intel-bts.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/arch/x86/util/intel-bts.c b/tools/perf/arch/x86/util/intel-bts.c
index d44d568..9403681 100644
--- a/tools/perf/arch/x86/util/intel-bts.c
+++ b/tools/perf/arch/x86/util/intel-bts.c
@@ -299,6 +299,7 @@ static int intel_bts_alloc_snapshot_refs(struct intel_bts_recording *btsr,
 
 	memcpy(refs, btsr->snapshot_refs, cnt * sz);
 
+	free(btsr->snapshot_refs);
 	btsr->snapshot_refs = refs;
 	btsr->snapshot_ref_cnt = new_cnt;
 
-- 
2.9.4