From bb45a893c2cd44b7e30b31221303b6c4e10ae1ec Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Mon, 20 Oct 2025 12:35:05 +0200
Subject: [PATCH] blockdev-util: in blockdev_partscan_enabled() check if we are
 operating on block device first

The function makes no sense on any other type of fd, hence we better
check this explicitly.
---
 src/shared/blockdev-util.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/shared/blockdev-util.c b/src/shared/blockdev-util.c
index 7641f17aec..4db38374be 100644
--- a/src/shared/blockdev-util.c
+++ b/src/shared/blockdev-util.c
@@ -414,6 +414,12 @@ int blockdev_partscan_enabled(sd_device *dev) {
 
         assert(dev);
 
+        r = device_in_subsystem(dev, "block");
+        if (r < 0)
+                return r;
+        if (r == 0)
+                return -ENOTBLK;
+
         /* For v6.10 or newer. */
         r = device_get_sysattr_bool(dev, "partscan");
         if (r != -ENOENT)