From b1005d127f164f49cf5aa08904b85194c5caf921 Mon Sep 17 00:00:00 2001
From: Stefan Eissing <stefan@eissing.org>
Date: Fri, 1 Mar 2024 09:12:50 +0100
Subject: [PATCH] bufq: writing into a softlimit queue cannot be partial

- when unable to obtain a new chunk on a softlimit bufq,
  this is an allocation error and needs to be reported as
  such.
- writes into a soflimit bufq never must be partial success

Reported-by: Dan Fandrich
Fixes #13020
Closes #13023
---
 lib/bufq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/bufq.c b/lib/bufq.c
index 4369fe0b26..c3245516c9 100644
--- a/lib/bufq.c
+++ b/lib/bufq.c
@@ -396,7 +396,7 @@ ssize_t Curl_bufq_write(struct bufq *q,
   while(len) {
     tail = get_non_full_tail(q);
     if(!tail) {
-      if(q->chunk_count < q->max_chunks) {
+      if((q->chunk_count < q->max_chunks) || (q->opts & BUFQ_OPT_SOFT_LIMIT)) {
         *err = CURLE_OUT_OF_MEMORY;
         return -1;
       }