From 421cf15486eea1b52f10e2b0be305018fee8c285 Mon Sep 17 00:00:00 2001
From: Rudi Heitbaum <rudi@heitbaum.com>
Date: Sun, 13 Aug 2023 09:37:32 +0000
Subject: [PATCH] shm: allow for older versions of Linux without
 MFD_NOEXEC_SEAL

Part-of: <https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/794>
---
 src/pulsecore/shm.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/pulsecore/shm.c b/src/pulsecore/shm.c
index 4247b0921..694f971b4 100644
--- a/src/pulsecore/shm.c
+++ b/src/pulsecore/shm.c
@@ -164,7 +164,11 @@ static int sharedmem_create(pa_shm *m, pa_mem_type_t type, size_t size, mode_t m
 #endif
 #ifdef HAVE_MEMFD
     case PA_MEM_TYPE_SHARED_MEMFD:
+        /* For linux >= 6.3 create fd with MFD_NOEXEC_SEAL flag */
         fd = memfd_create("pulseaudio", MFD_ALLOW_SEALING|MFD_CLOEXEC|MFD_NOEXEC_SEAL);
+        /* Retry creating fd without MFD_NOEXEC_SEAL to support linux < 6.3 */
+        if (fd < 0)
+            fd = memfd_create("pulseaudio", MFD_ALLOW_SEALING|MFD_CLOEXEC);
         break;
 #endif
     default: