In dm_get_maps func, if vector_alloc_slot(mp) fails, the
mpp should be free.

Here we call free_multipath(mpp, KEEP_PATHS) to free map.

Signed-off-by: Lixiaokeng <lixiaok...@huawei.com>
Signed-off-by: Zhiqiang Liu <liuzhiqian...@huawei.com>

---
 libmultipath/devmapper.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libmultipath/devmapper.c b/libmultipath/devmapper.c
index f597ff8b..92eef6f1 100644
--- a/libmultipath/devmapper.c
+++ b/libmultipath/devmapper.c
@@ -1198,8 +1198,10 @@ dm_get_maps (vector mp)
                if (!mpp)
                        goto out;

-               if (!vector_alloc_slot(mp))
+               if (!vector_alloc_slot(mp)) {
+                       free_multipath(mpp, KEEP_PATHS);
                        goto out;
+               }

                vector_set_slot(mp, mpp);
                mpp = NULL;
-- 

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