From: Florin Coras <fcoras@cisco.com>
Date: Mon, 24 Jun 2019 23:54:52 +0000 (-0700)
Subject: svm: make sure chunk search does not return tnil
X-Git-Tag: v20.01-rc0~339
X-Git-Url: https://gerrit.fd.io/r/gitweb?a=commitdiff_plain;h=8eb3e07dea2c905ab46e0236bca9750224484ee8;p=vpp.git

svm: make sure chunk search does not return tnil

Type:fix

Change-Id: I8405bf8d93b4468c54f4f3c5dcd21ef91a6b1048
Signed-off-by: Florin Coras <fcoras@cisco.com>
---

diff --git a/src/svm/svm_fifo.c b/src/svm/svm_fifo.c
index 87e019ab1f1..3d538293c70 100644
--- a/src/svm/svm_fifo.c
+++ b/src/svm/svm_fifo.c
@@ -496,6 +496,8 @@ svm_fifo_find_chunk (svm_fifo_t * f, u32 pos)
 	  if (pos < prev->key)
 	    {
 	      cur = rb_tree_predecessor (rt, prev);
+	      if (rb_node_is_tnil (rt, cur))
+		return 0;
 	      c = uword_to_pointer (cur->opaque, svm_fifo_chunk_t *);
 	      if (svm_fifo_chunk_includes_pos (c, pos))
 		return c;