From: Mike Yuan <me@yhndnzj.com>
Date: Sat, 8 Nov 2025 19:26:31 +0000 (+0100)
Subject: core/exec-credential: work around tmpfs reconfigure bug
X-Git-Tag: v259-rc1~92^2~3
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=44f23805b083108cb7524fb0558dba04c1ac692f;p=thirdparty%2Fsystemd.git

core/exec-credential: work around tmpfs reconfigure bug
---

diff --git a/src/core/exec-credential.c b/src/core/exec-credential.c
index 632365fbac7..d2b83073694 100644
--- a/src/core/exec-credential.c
+++ b/src/core/exec-credential.c
@@ -1065,6 +1065,11 @@ static int setup_credentials_internal(
         if (r < 0)
                 return log_debug_errno(r, "Failed to adjust ACLs of credentials dir: %m");
 
+        // Work around a kernel bug that results in tmpfs reconfiguration failure.
+        // FIXME: drop this once https://lore.kernel.org/linux-fsdevel/20251108190930.440685-1-me@yhndnzj.com/
+        // is merged and hits the distro kernels.
+        (void) fsconfig(fs_fd, FSCONFIG_SET_FLAG, "noswap", NULL, 0);
+
         if (fsconfig(fs_fd, FSCONFIG_SET_FLAG, "ro", NULL, 0) < 0)
                 return -errno;