From f47487c219978cd9d9db34f7b1669e5e44051af1 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Sat, 24 Feb 2024 22:38:22 +0100
Subject: [PATCH] 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
---
 lib/vssh/libssh.c  | 2 ++
 lib/vssh/libssh2.c | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/lib/vssh/libssh.c b/lib/vssh/libssh.c
index c6dc63ae66..02148d0c18 100644
--- 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 e9dfef950d..3a661f81eb 100644
--- 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;
           }