[Qemu-devel] [PULL 2/2] migration: use g_free for ram load bitmap

[Juan Quintela <quintela@redhat.com>]

From: Peter Xu <peterx@redhat.com>

Buffers allocated with bitmap_new() should be freed with g_free().

Both reported by Coverity:

*** CID 1391300:  API usage errors  (ALLOC_FREE_MISMATCH)
/migration/ram.c: 3517 in ram_dirty_bitmap_reload()
3511          * the last one to sync, we need to notify the main send thread.
3512          */
3513         ram_dirty_bitmap_reload_notify(s);
3514
3515         ret = 0;
3516     out:
>>>     CID 1391300:  API usage errors  (ALLOC_FREE_MISMATCH)
>>>     Calling "free" frees "le_bitmap" using "free" but it should have been freed using "g_free".
3517         free(le_bitmap);
3518         return ret;
3519     }
3520
3521     static int ram_resume_prepare(MigrationState *s, void *opaque)
3522     {

*** CID 1391292:  API usage errors  (ALLOC_FREE_MISMATCH)
/migration/ram.c: 249 in ramblock_recv_bitmap_send()
243          * Mark as an end, in case the middle part is screwed up due to
244          * some "misterious" reason.
245          */
246         qemu_put_be64(file, RAMBLOCK_RECV_BITMAP_ENDING);
247         qemu_fflush(file);
248
>>>     CID 1391292:  API usage errors  (ALLOC_FREE_MISMATCH)
>>>     Calling "free" frees "le_bitmap" using "free" but it should have been freed using "g_free".
249         free(le_bitmap);
250
251         if (qemu_file_get_error(file)) {
252             return qemu_file_get_error(file);
253         }
254

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Message-Id: <20180525015042.31778-1-peterx@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
---
 migration/ram.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/migration/ram.c b/migration/ram.c
index 5bcbf7a9f9..c53e8369a3 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -246,7 +246,7 @@ int64_t ramblock_recv_bitmap_send(QEMUFile *file,
     qemu_put_be64(file, RAMBLOCK_RECV_BITMAP_ENDING);
     qemu_fflush(file);
 
-    free(le_bitmap);
+    g_free(le_bitmap);
 
     if (qemu_file_get_error(file)) {
         return qemu_file_get_error(file);
@@ -3514,7 +3514,7 @@ int ram_dirty_bitmap_reload(MigrationState *s, RAMBlock *block)
 
     ret = 0;
 out:
-    free(le_bitmap);
+    g_free(le_bitmap);
     return ret;
 }
 
-- 
2.17.0