3.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 6f24f892871acc47b40dd594c63606a17c714f77 upstream.

Commit ec81aecb2966 ("hfs: fix a potential buffer overflow") fixed a few
potential buffer overflows in the hfs filesystem.  But as Timo Warns
pointed out, these changes also need to be made on the hfsplus
filesystem as well.

Reported-by: Timo Warns <redacted>
Acked-by: WANG Cong <redacted>
Cc: Alexey Khoroshilov <redacted>
Cc: Miklos Szeredi <redacted>
Cc: Sage Weil <redacted>
Cc: Eugene Teo <redacted>
Cc: Roman Zippel <redacted>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Alexey Dobriyan <redacted>
Cc: Dave Anderson <redacted>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <redacted>
---
 fs/hfsplus/catalog.c |    4 ++++
 fs/hfsplus/dir.c     |   11 +++++++++++
 2 files changed, 15 insertions(+)

diff --git a/fs/hfsplus/catalog.c b/fs/hfsplus/catalog.c
index 4dfbfec..ec2a9c2 100644
--- a/fs/hfsplus/catalog.c
+++ b/fs/hfsplus/catalog.c

@@ -366,6 +366,10 @@ int hfsplus_rename_cat(u32 cnid,
 	err = hfs_brec_find(&src_fd);
 	if (err)
 		goto out;
+	if (src_fd.entrylength > sizeof(entry) || src_fd.entrylength < 0) {
+		err = -EIO;
+		goto out;
+	}
 
 	hfs_bnode_read(src_fd.bnode, &entry, src_fd.entryoffset,
 				src_fd.entrylength);

diff --git a/fs/hfsplus/dir.c b/fs/hfsplus/dir.c
index 88e155f..26b53fb 100644
--- a/fs/hfsplus/dir.c
+++ b/fs/hfsplus/dir.c

@@ -150,6 +150,11 @@ static int hfsplus_readdir(struct file *filp, void *dirent, filldir_t filldir)
 		filp->f_pos++;
 		/* fall through */
 	case 1:
+		if (fd.entrylength > sizeof(entry) || fd.entrylength < 0) {
+			err = -EIO;
+			goto out;
+		}
+
 		hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 			fd.entrylength);
 		if (be16_to_cpu(entry.type) != HFSPLUS_FOLDER_THREAD) {

@@ -181,6 +186,12 @@ static int hfsplus_readdir(struct file *filp, void *dirent, filldir_t filldir)
 			err = -EIO;
 			goto out;
 		}
+
+		if (fd.entrylength > sizeof(entry) || fd.entrylength < 0) {
+			err = -EIO;
+			goto out;
+		}
+
 		hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 			fd.entrylength);
 		type = be16_to_cpu(entry.type);

-- 
1.7.10