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-rw-r--r--lib/ftp.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/lib/ftp.c b/lib/ftp.c
index 7dbf08004..429708fc5 100644
--- a/lib/ftp.c
+++ b/lib/ftp.c
@@ -3963,10 +3963,14 @@ CURLcode Curl_ftpsend(struct connectdata *conn, const char *cmd)
enum protection_level data_sec = conn->data_prot;
#endif
+ if(!cmd)
+ return CURLE_BAD_FUNCTION_ARGUMENT;
+
write_len = strlen(cmd);
- if(write_len > (sizeof(s) -3))
+ if(!write_len || write_len > (sizeof(s) -3))
return CURLE_BAD_FUNCTION_ARGUMENT;
+ memcpy(&s, cmd, write_len);
strcpy(&s[write_len], "\r\n"); /* append a trailing CRLF */
write_len += 2;
bytes_written = 0;