From e39cbb14428609a2bdacbf6bb8da264135cf8972 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Fri, 22 Nov 2024 12:14:59 +0100
Subject: [PATCH] varlink: apparently on old kernels SO_PEERPIDFD returns
 EINVAL

---
 src/libsystemd/sd-varlink/varlink-util.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libsystemd/sd-varlink/varlink-util.c b/src/libsystemd/sd-varlink/varlink-util.c
index 971be643e8..b16d4bddb6 100644
--- a/src/libsystemd/sd-varlink/varlink-util.c
+++ b/src/libsystemd/sd-varlink/varlink-util.c
@@ -16,7 +16,7 @@ int varlink_get_peer_pidref(sd_varlink *v, PidRef *ret) {
 
         int pidfd = sd_varlink_get_peer_pidfd(v);
         if (pidfd < 0) {
-                if (!ERRNO_IS_NEG_NOT_SUPPORTED(pidfd))
+                if (!ERRNO_IS_NEG_NOT_SUPPORTED(pidfd) && pidfd != -EINVAL)
                         return pidfd;
 
                 pid_t pid;
-- 
2.25.1