Add patch to fix Linux kernel regression with mmap and MAP_32BIT

files/patches/mono-linux-disable-mmap-MAP_32BIT.diff

@@ -0,0 +1,47 @@
+From e019d4ac4735e774d0a3c15bb36d5eb3ebfa3053 Mon Sep 17 00:00:00 2001
+From: Raphael Robatsch <[email protected]>
+Date: Tue, 9 May 2023 11:55:02 +0200
+Subject: [PATCH] Disable mmap(MAP_32BIT) support
+
+mmap(2) with flag MAP_32BIT can erroneously return ENOMEM on recent
+kernels. Disable MAP_32BIT support for now.
+
+Reference: https://lore.kernel.org/linux-mm/[email protected]/
+Reference: https://lore.kernel.org/all/[email protected]/T/#m00a0ac8a72bf2f26711b7f8cc56612a8ef62c3d0
+---
+ mono/mini/mini-amd64.h    | 2 --
+ mono/utils/mono-codeman.c | 4 ----
+ 2 files changed, 6 deletions(-)
+
+diff --git a/mono/mini/mini-amd64.h b/mono/mini/mini-amd64.h
+index b321743b67d..0a81bb4bd6b 100644
+--- a/mono/mini/mini-amd64.h
++++ b/mono/mini/mini-amd64.h
+@@ -390,9 +390,7 @@ typedef struct {
+
+ #endif /* !HOST_WIN32 */
+
+-#if !defined(__linux__)
+ #define MONO_ARCH_NOMAP32BIT 1
+-#endif
+
+ #ifdef TARGET_WIN32
+ #define MONO_AMD64_ARG_REG1 AMD64_RCX
+diff --git a/mono/utils/mono-codeman.c b/mono/utils/mono-codeman.c
+index 234aac4b0ca..5eccda92bd0 100644
+--- a/mono/utils/mono-codeman.c
++++ b/mono/utils/mono-codeman.c
+@@ -68,11 +68,7 @@ static const MonoCodeManagerCallbacks *code_manager_callbacks;
+ #define MAX_WASTAGE 32
+ #define MIN_BSIZE 32
+
+-#ifdef __x86_64__
+-#define ARCH_MAP_FLAGS MONO_MMAP_32BIT
+-#else
+ #define ARCH_MAP_FLAGS 0
+-#endif
+
+ #define MONO_PROT_RWX (MONO_MMAP_READ|MONO_MMAP_WRITE|MONO_MMAP_EXEC|MONO_MMAP_JIT)
+
+--
+2.40.1

patch_mono.py

@@ -35,6 +35,7 @@ def main(raw_args):
         'btls-cmake-args-linux-mingw.diff',
         'btls-cmake-arm64.diff',
         'xcode_13_14_fix.diff',
+        'mono-linux-disable-mmap-MAP_32BIT.diff',
     ]
 
     if os.path.isfile(os.path.join(mono_source_root, 'mono/tools/offsets-tool/offsets-tool.py')):