From f1a8a66c35fbfe70d4f425e68becd8c1d1313464 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
Date: Thu, 25 Mar 2021 13:50:13 +0100
Subject: [PATCH] basic/fileio: use malloc_usable_size() to use all allocated
 memory

---
 src/basic/fileio.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/basic/fileio.c b/src/basic/fileio.c
index 7c370d4fc3c..a158ab080d7 100644
--- a/src/basic/fileio.c
+++ b/src/basic/fileio.c
@@ -426,6 +426,7 @@ int read_full_virtual_file(const char *filename, char **ret_contents, size_t *re
                 buf = malloc(size + 1);
                 if (!buf)
                         return -ENOMEM;
+                size = malloc_usable_size(buf) - 1; /* Use a bigger allocation if we got it anyway */
 
                 for (;;) {
                         ssize_t k;
-- 
2.47.3