Patch "udf: Check length of extended attributes and allocation" has been added to the 3.14-stable tree

This is a note to let you know that I've just added the patch titled

udf: Check length of extended attributes and allocation

to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
udf-check-length-of-extended-attributes-and-allocation.patch
and it can be found in the queue-3.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Jan Kara <[email protected]>
Date: Wed, 7 Jan 2015 13:49:08 +0100
Subject: udf: Check length of extended attributes and allocation
descriptors

From: Jan Kara <[email protected]>

commit 23b133bdc452aa441fcb9b82cbf6dd05cfd342d0 upstream.

Check length of extended attributes and allocation descriptors when loading inodes from disk. Otherwise corrupted filesystems could confuse the code and make the kernel oops.

This fixes CVE-2015-4167.

---
 fs/udf/inode.c |   16 ++++++++++++++++
 1 file changed, 16 insertions(+)

@@ -1496,6 +1496,22 @@ static void udf_fill_inode(struct inode
 		iinfo->i_checkpoint = le32_to_cpu(efe->checkpoint);
 	}
 
+	/*
+	 * Sanity check length of allocation descriptors and extended attrs to
+	 * avoid integer overflows
+	 */
+	if (iinfo->i_lenEAttr > inode->i_sb->s_blocksize
+			|| iinfo->i_lenAlloc > inode->i_sb->s_blocksize) {
+		make_bad_inode(inode);
+		return;
+	}
+	/* Now do exact checks */
+	if (udf_file_entry_alloc_offset(inode)
+			+ iinfo->i_lenAlloc > inode->i_sb->s_blocksize) {
+		make_bad_inode(inode);
+		return;
+	}
+
 	switch (fe->icbTag.fileType) {
 	case ICBTAG_FILE_TYPE_DIRECTORY:
 		inode->i_op = &udf_dir_inode_operations;

Patches currently in stable-queue which might be from [email protected] are

queue-3.14/udf-check-length-of-extended-attributes-and-allocation.patch