Fixes ticket #9507.

Signed-off-by: wujian_nanjing <wujian2@huawei.com>
---
 libavcodec/v4l2_m2m.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavcodec/v4l2_m2m.c b/libavcodec/v4l2_m2m.c
index 51932ba..9849360 100644
--- a/libavcodec/v4l2_m2m.c
+++ b/libavcodec/v4l2_m2m.c
@@ -251,7 +251,8 @@ static void v4l2_m2m_destroy_context(void *opaque, uint8_t *context)
     ff_v4l2_context_release(&s->capture);
     sem_destroy(&s->refsync);
 
-    close(s->fd);
+    if (s->fd >= 0)
+        close(s->fd);
     av_frame_unref(s->frame);
     av_frame_free(&s->frame);
     av_packet_unref(&s->buf_pkt);
-- 
2.7.4
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