libssh/libssh2: return error on too big range

If trying to get the range 0 - 2^63 and the remote file is 2^63 bytes or
larger.

Fixes #12983
Closes #12984

diff --git a/lib/vssh/libssh.c b/lib/vssh/libssh.c
index c6dc63ae66f9743b8f2cc560b765b6aae9f80dfd..02148d0c1873d840ff390ad646ff59305ee1c670 100644 (file)
--- a/lib/vssh/libssh.c
+++ b/lib/vssh/libssh.c
@@ -1665,6 +1665,8 @@ static CURLcode myssh_statemach_act(struct Curl_easy *data, bool *block)
             size = 0;
           }
           else {
+            if((to - from) == CURL_OFF_T_MAX)
+              return CURLE_RANGE_ERROR;
             size = to - from + 1;
           }
 

diff --git a/lib/vssh/libssh2.c b/lib/vssh/libssh2.c
index e9dfef950d856abc9c57081aec934ee2ae4d9314..3a661f81eb2f2fc5189c885b059fa6c4ff3dc331 100644 (file)
--- a/lib/vssh/libssh2.c
+++ b/lib/vssh/libssh2.c
@@ -2544,6 +2544,8 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
             size = 0;
           }
           else {
+            if((to - from) == CURL_OFF_T_MAX)
+              return CURLE_RANGE_ERROR;
             size = to - from + 1;
           }