From bbda77769d5be17206923d9b4944e2fbd463b3a7 Mon Sep 17 00:00:00 2001
From: Lephe <sebastien.michelland@protonmail.com>
Date: Thu, 10 Nov 2022 19:54:45 +0100
Subject: [PATCH] kmalloc: fix krealloc() not trying across arenas

---
 src/kmalloc/kmalloc.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/kmalloc/kmalloc.c b/src/kmalloc/kmalloc.c
index bb2d2ca..c734c32 100644
--- a/src/kmalloc/kmalloc.c
+++ b/src/kmalloc/kmalloc.c
@@ -112,6 +112,16 @@ void *krealloc(void *ptr, size_t size)
 	else
 	{
 		a->stats.total_failures++;
+
+		/* If reallocation within the original arena fails, try another
+		   one. The memory copy behavior is sub-optimal (we copy the
+		   new size which might be more than the original size) but
+		   it's all we can do with this arena interface. */
+		rc = kmalloc(size, NULL);
+		if(rc)
+		{
+			memcpy(rc, ptr, size);
+		}
 	}
 
 	return rc;