From bd068e29030e9efef2ef692837ee60905d2812af Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Tue, 8 Jul 2025 18:51:55 +0900
Subject: [PATCH] binfmt-util: propagate failure in access_fd()

It is not necessary to hide errors in access_fd(), and only acceptable
errors here are -EROFS, -EACCES, and -EPERM.
---
 src/shared/binfmt-util.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/shared/binfmt-util.c b/src/shared/binfmt-util.c
index c88ce2cd0e..49d920c292 100644
--- a/src/shared/binfmt-util.c
+++ b/src/shared/binfmt-util.c
@@ -25,7 +25,13 @@ int binfmt_mounted(void) {
         if (r <= 0)
                 return r;
 
-        return access_fd(fd, W_OK) >= 0;
+        r = access_fd(fd, W_OK);
+        if (ERRNO_IS_NEG_FS_WRITE_REFUSED(r))
+                return false;
+        if (r < 0)
+                return r;
+
+        return true;
 }
 
 int disable_binfmt(void) {