commit 5472019152eef1701208fd82a1a0d3eff2ee5c34
author Michal Vasko <mvasko@cesnet.cz> Fri Jun 11 13:55:59 2021 +0200
committer Michal Vasko <mvasko@cesnet.cz> Fri Jun 11 13:55:59 2021 +0200
tree fcdd5a59858bfb6670d3dd34efc39f185721cc85
parent 9e5434052f9f8e20349e0433e7328d1c994da314

parser yang BUGFIX avoid calling memmove with invalid params

Refs #1611

src/parser_yang.c

diff --git a/src/parser_yang.c b/src/parser_yang.c
index 7e5cc98..f885b43 100644
--- a/src/parser_yang.c
+++ b/src/parser_yang.c
@@ -2061,7 +2061,9 @@
         buf = malloc(word_len + 2);
     }
     LY_CHECK_ERR_RET(!buf, LOGMEM(PARSER_CTX(ctx)), LY_EMEM);
-    memmove(buf + 1, word, word_len);
+    if (word_len) {
+        memmove(buf + 1, word, word_len);
+    }
     buf[0] = LYSP_RESTR_PATTERN_ACK; /* pattern's default regular-match flag */
     buf[word_len + 1] = '\0'; /* terminating NULL byte */
     LY_CHECK_RET(lydict_insert_zc(PARSER_CTX(ctx), buf, &restr->arg.str));