From ebc96086af49fe70108cafcea6ab4bebd658a41a Mon Sep 17 00:00:00 2001
From: slaren <slarengh@gmail.com>
Date: Fri, 8 Sep 2023 04:04:56 +0200
Subject: [PATCH] ggml-alloc : correctly check mmap return value for errors
 (#3075)

---
 ggml-alloc.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/ggml-alloc.c b/ggml-alloc.c
index a896601d1..e2ac891d1 100644
--- a/ggml-alloc.c
+++ b/ggml-alloc.c
@@ -316,7 +316,11 @@ static void * alloc_vmem(size_t size) {
 #if defined(_WIN32)
     return VirtualAlloc(NULL, size, MEM_RESERVE, PAGE_NOACCESS);
 #elif defined(_POSIX_MAPPED_FILES)
-    return mmap(NULL, size, PROT_NONE, MAP_PRIVATE | MAP_ANON, -1, 0);
+    void * ptr = mmap(NULL, size, PROT_NONE, MAP_PRIVATE | MAP_ANON, -1, 0);
+    if (ptr == MAP_FAILED) {
+        return NULL;
+    }
+    return ptr;
 #else
     // use a fixed address for other platforms
     uintptr_t base_addr = (uintptr_t)-size - 0x100;