From 8073a5137f223bb481606b15edaa5ecb93ceffcb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dag-Erling=20Sm=C3=B8rgrav?= <des@FreeBSD.org>
Date: Sun, 17 Aug 2025 19:07:45 +0200
Subject: [PATCH] getmntpoint: Don't compare st_rdev for non-devices

If the mntfromname of a mountpoint is not a device (e.g. nullfs, tarfs,
procfs) we shouldn't compare st_rdev, as any match will be spurious.

MFC after:	1 week
Sponsored by:	Klara, Inc.
Sponsored by:	NetApp, Inc.
Reviewed by:	kib
Differential Revision:	https://reviews.freebsd.org/D51945
---
 lib/libutil/mntopts.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/libutil/mntopts.c b/lib/libutil/mntopts.c
index 1d9347e3108..07d3dd6d98a 100644
--- a/lib/libutil/mntopts.c
+++ b/lib/libutil/mntopts.c
@@ -185,6 +185,7 @@ getmntpoint(const char *name)
 				strncpy(statfsp->f_mntfromname, device, len);
 		}
 		if (stat(ddevname, &mntdevstat) == 0 &&
+		    S_ISCHR(mntdevstat.st_mode) &&
 		    mntdevstat.st_rdev == devstat.st_rdev)
 			return (statfsp);
 	}