Re: FFS: wrong superblock check ~> crash

[Maxime Villard <max%M00nBSD.net@localhost>]

I'll commit this, unless anyone disagrees.

Index: ffs_vfsops.c
===================================================================
RCS file: /cvsroot/src/sys/ufs/ffs/ffs_vfsops.c,v
retrieving revision 1.299
diff -u -r1.299 ffs_vfsops.c
--- ffs_vfsops.c	24 May 2014 16:34:04 -0000	1.299
+++ ffs_vfsops.c	27 Oct 2014 18:29:50 -0000
@@ -684,7 +684,7 @@
 		fs->fs_flags &= ~FS_SWAPPED;
 	if ((newfs->fs_magic != FS_UFS1_MAGIC &&
 	     newfs->fs_magic != FS_UFS2_MAGIC)||
-	     newfs->fs_bsize > MAXBSIZE ||
+	     newfs->fs_bsize > SBLOCKSIZE ||
 	     newfs->fs_bsize < sizeof(struct fs)) {
 		brelse(bp, 0);
 		kmem_free(newfs, fs->fs_sbsize);
@@ -974,7 +974,7 @@
 			continue;
 
 		/* Validate size of superblock */
-		if (sbsize > MAXBSIZE || sbsize < sizeof(struct fs))
+		if (sbsize > SBLOCKSIZE || sbsize < sizeof(struct fs))
 			continue;
 
 		/* Check that we can handle the file system blocksize */