diff --git a/sys/geom/label/g_label_ufs.c b/sys/geom/label/g_label_ufs.c
index ababbaa4b43a..70d59488d7b6 100644
--- a/sys/geom/label/g_label_ufs.c
+++ b/sys/geom/label/g_label_ufs.c
@@ -1,155 +1,130 @@
 /*-
  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
  *
  * Copyright (c) 2002, 2003 Gordon Tetlow
  * Copyright (c) 2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
 
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/malloc.h>
 #include <sys/vnode.h>
 
 #include <ufs/ufs/dinode.h>
 #include <ufs/ffs/fs.h>
 #include <ufs/ufs/quota.h>
 #include <ufs/ufs/extattr.h>
 #include <ufs/ffs/ffs_extern.h>
 
 #include <geom/geom.h>
 #include <geom/geom_dbg.h>
 #include <geom/label/g_label.h>
 
 #define	G_LABEL_UFS_VOLUME	0
 #define	G_LABEL_UFS_ID		1
 
 /*
- * G_LABEL_UFS_CMP returns true if difference between provider mediasize
- * and filesystem size is less than G_LABEL_UFS_MAXDIFF sectors
- */
-#define	G_LABEL_UFS_CMP(prov, fsys, size) 				   \
-	( abs( ((fsys)->size) - ( (prov)->mediasize / (fsys)->fs_fsize ))  \
-				< G_LABEL_UFS_MAXDIFF )
-#define	G_LABEL_UFS_MAXDIFF	0x100
-
-/*
- * Try to find a superblock on the provider. If successful, then
- * check that the size in the superblock corresponds to the size
- * of the underlying provider. Finally, look for a volume label
- * and create an appropriate provider based on that.
+ * Try to find a superblock on the provider. If successful, look for a volume
+ * label and create an appropriate provider based on that.
  */
 static void
 g_label_ufs_taste_common(struct g_consumer *cp, char *label, size_t size, int what)
 {
 	struct g_provider *pp;
 	struct fs *fs;
 
 	g_topology_assert_not();
 	pp = cp->provider;
 	label[0] = '\0';
 
 	fs = NULL;
 	if (SBLOCKSIZE % pp->sectorsize != 0 || ffs_sbget(cp, &fs,
 	    STDSB_NOHASHFAIL, M_GEOM, g_use_g_read_data) != 0) {
 		KASSERT(fs == NULL,
 		    ("g_label_ufs_taste_common: non-NULL fs %p\n", fs));
 		return;
 	}
 
-	/*
-	 * Check for magic. We also need to check if file system size
-	 * is almost equal to providers size, because sysinstall(8)
-	 * used to bogusly put first partition at offset 0
-	 * instead of 16, and glabel/ufs would find file system on slice
-	 * instead of partition.
-	 *
-	 * In addition, media size can be a bit bigger than file system
-	 * size. For instance, mkuzip can append bytes to align data
-	 * to large sector size (it improves compression rates).
-	 */
-	if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_fsize > 0 &&
-	    ( G_LABEL_UFS_CMP(pp, fs, fs_old_size)
-		|| G_LABEL_UFS_CMP(pp, fs, fs_providersize))) {
+	/* Check for magic. */
+	if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_fsize > 0) {
 		/* Valid UFS1. */
-	} else if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_fsize > 0 &&
-	    ( G_LABEL_UFS_CMP(pp, fs, fs_size)
-		|| G_LABEL_UFS_CMP(pp, fs, fs_providersize))) {
+	} else if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_fsize > 0) {
 		/* Valid UFS2. */
 	} else {
 		goto out;
 	}
 	G_LABEL_DEBUG(1, "%s file system detected on %s.",
 	    fs->fs_magic == FS_UFS1_MAGIC ? "UFS1" : "UFS2", pp->name);
 	switch (what) {
 	case G_LABEL_UFS_VOLUME:
 		/* Check for volume label */
 		if (fs->fs_volname[0] != '\0')
 			strlcpy(label, fs->fs_volname, size);
 		break;
 	case G_LABEL_UFS_ID:
 		if (fs->fs_id[0] != 0 || fs->fs_id[1] != 0)
 			snprintf(label, size, "%08x%08x", fs->fs_id[0],
 			    fs->fs_id[1]);
 		break;
 	}
 out:
 	g_free(fs->fs_csp);
 	g_free(fs->fs_si);
 	g_free(fs);
 }
 
 static void
 g_label_ufs_volume_taste(struct g_consumer *cp, char *label, size_t size)
 {
 
 	g_label_ufs_taste_common(cp, label, size, G_LABEL_UFS_VOLUME);
 }
 
 static void
 g_label_ufs_id_taste(struct g_consumer *cp, char *label, size_t size)
 {
 
 	g_label_ufs_taste_common(cp, label, size, G_LABEL_UFS_ID);
 }
 
 struct g_label_desc g_label_ufs_volume = {
 	.ld_taste = g_label_ufs_volume_taste,
 	.ld_dirprefix = "ufs/",
 	.ld_enabled = 1
 };
 
 struct g_label_desc g_label_ufs_id = {
 	.ld_taste = g_label_ufs_id_taste,
 	.ld_dirprefix = "ufsid/",
 	.ld_enabled = 1
 };
 
 G_LABEL_INIT(ufsid, g_label_ufs_id, "Create device nodes for UFS file system IDs");
 G_LABEL_INIT(ufs, g_label_ufs_volume, "Create device nodes for UFS volume names");
 
 MODULE_DEPEND(g_label, ufs, 1, 1, 1);