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From foo@baz Fri May 4 12:02:41 PDT 2012
Date: Fri, 04 May 2012 12:02:41 -0700
To: Greg KH <gregkh@linuxfoundation.org>
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: [PATCH] hfsplus: Fix potential buffer overflows
commit ec81aecb29668ad71f699f4e7b96ec46691895b6 (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 <warns@pre-sense.de>
Signed-off-by: WANG Cong <amwang@redhat.com>
Cc: Alexey Khoroshilov <khoroshilov@ispras.ru>
Cc: Cong Wang <amwang@redhat.com>
Cc: Miklos Szeredi <mszeredi@suse.cz>
Cc: Sage Weil <sage@newdream.net>
Cc: Eugene Teo <eteo@redhat.com>
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Dave Anderson <anderson@redhat.com>
Cc: stable <stable@vger.kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/hfsplus/catalog.c | 4 ++++
fs/hfsplus/dir.c | 11 +++++++++++
2 files changed, 15 insertions(+)
--- 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);
--- a/fs/hfsplus/dir.c
+++ b/fs/hfsplus/dir.c
@@ -150,6 +150,11 @@ static int hfsplus_readdir(struct file *
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 *
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);
|
