From a9b60de478de510a5e38c80b195456806cdc2b98 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Wed, 3 Dec 2025 09:38:50 +0100
Subject: [PATCH] mountfsd: return a better error when invalid file flags are
 specified on image fd

We already defined an error for this that we return for invalid dir fds
passed in, let's add the same niceness to the image fds.
---
 src/mountfsd/mountwork.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/mountfsd/mountwork.c b/src/mountfsd/mountwork.c
index 4c321ce1c07..7de8784e326 100644
--- a/src/mountfsd/mountwork.c
+++ b/src/mountfsd/mountwork.c
@@ -353,6 +353,8 @@ static int vl_method_mount_image(
         }
 
         r = validate_image_fd(image_fd, &p);
+        if (r == -EREMOTEIO)
+                return sd_varlink_errorbo(link, "io.systemd.MountFileSystem.BadFileDescriptorFlags", SD_JSON_BUILD_PAIR_STRING("parameter", "imageFileDescriptor"));
         if (r < 0)
                 return r;
 
-- 
2.47.3