svn commit: r346189 - stable/11/sys/fs/ext2fs

[Pedro F. Giffuni]

Author: pfg
Date: Sat Apr 13 20:49:16 2019
New Revision: 346189
URL: https://svnweb.freebsd.org/changeset/base/346189

Log:
  MFC r344755 (by fsu@)
  Fix integer overflow possibility.
  
  Reported by:	Christopher Krah, Thomas Barabosch, and Jan-Niclas Hilgert
  		of Fraunhofer FKIE
  Reported as:    FS-2-EXT2-1: Out-of-Bounds Write in nmount (ext2_vget)
  Reviewed by:    pfg
  MFC after:      1 week
  
  Differential Revision:    https://reviews.freebsd.org/D19326

Modified:
  stable/11/sys/fs/ext2fs/ext2_vfsops.c
Directory Properties:
  stable/11/   (props changed)

Modified: stable/11/sys/fs/ext2fs/ext2_vfsops.c
==============================================================================
--- stable/11/sys/fs/ext2fs/ext2_vfsops.c	Sat Apr 13 19:23:11 2019	(r346188)
+++ stable/11/sys/fs/ext2fs/ext2_vfsops.c	Sat Apr 13 20:49:16 2019	(r346189)
@@ -940,8 +940,8 @@ ext2_vget(struct mount *mp, ino_t ino, int flags, stru
 	struct buf *bp;
 	struct vnode *vp;
 	struct thread *td;
-	int i, error;
-	int used_blocks;
+	unsigned int i, used_blocks;
+	int error;
 
 	td = curthread;
 	error = vfs_hash_get(mp, ino, flags, td, vpp, NULL, NULL);