From: Stephan Mueller <smueller@chronox.de>

The patch ensures that body_size is checked for improper values.

Signed-off-by: Stephan Mueller <smueller@chronox.de>
Acked-by: Michael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 fs/ecryptfs/keystore.c |    6 ++++++
 1 files changed, 6 insertions(+)

diff -puN fs/ecryptfs/keystore.c~ecryptfs-validate-body-size fs/ecryptfs/keystore.c
--- 25/fs/ecryptfs/keystore.c~ecryptfs-validate-body-size	Tue Jun 27 15:09:33 2006
+++ 25-akpm/fs/ecryptfs/keystore.c	Tue Jun 27 15:09:33 2006
@@ -397,6 +397,12 @@ parse_tag_11_packet(unsigned char *data,
 		rc = -EINVAL;
 		goto out;
 	}
+	if (body_size < 13) {
+		ecryptfs_printk(KERN_WARNING, "Invalid body size ([%d])\n",
+				body_size);
+		rc = -EINVAL;
+		goto out;
+	}
 	/* We have 13 bytes of surrounding packet values */
 	(*tag_11_contents_size) = (body_size - 13);
 	if ((*tag_11_contents_size) > max_contents_bytes) {
_