From d711f459ae1b73f7a1e6e6b596c1aff3066ecc29 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Thu, 5 Jan 2023 16:36:55 -0700
Subject: [PATCH] std.crypto.tls.Client: fix crash in read()

An abstraction for giving bytes to the read buffer didn't check for an
out-of-space condition.
---
 lib/std/crypto/tls/Client.zig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/std/crypto/tls/Client.zig b/lib/std/crypto/tls/Client.zig
index 44891a1973..627ad7ea59 100644
--- a/lib/std/crypto/tls/Client.zig
+++ b/lib/std/crypto/tls/Client.zig
@@ -1207,6 +1207,7 @@ const VecPut = struct {
     /// Returns the amount actually put which is always equal to bytes.len
     /// unless the vectors ran out of space.
     fn put(vp: *VecPut, bytes: []const u8) usize {
+        if (vp.idx >= vp.iovecs.len) return 0;
         var bytes_i: usize = 0;
         while (true) {
             const v = vp.iovecs[vp.idx];