vcl: if the ldp user send buf with 0 len, it will assert failed.

Type: fix

Change-Id: I8ff60cf8726c463491c687e170ad0b1026a1303a
Signed-off-by: jiangxiaoming <jiangxiaoming@outlook.com>

diff --git a/src/vcl/vppcom.c b/src/vcl/vppcom.c
index 263fa91..0e5d4fa 100644 (file)
--- a/src/vcl/vppcom.c
+++ b/src/vcl/vppcom.c
@@ -1897,7 +1897,7 @@ vppcom_session_write_inline (uint32_t session_handle, void *buf, size_t n,
   svm_msg_q_t *mq;
   u8 is_ct;
 
-  if (PREDICT_FALSE (!buf))
+  if (PREDICT_FALSE (!buf || n == 0))
     return VPPCOM_EINVAL;
 
   s = vcl_session_get_w_handle (wrk, session_handle);