[PATCH 4.2.y-ckt 132/305] ext4: fix an endianness bug in ext4_encrypted_follow_link()

From: Kamal Mostafa
Date: Fri Jan 15 2016 - 19:58:58 EST


4.2.8-ckt2 -stable review patch. If anyone has any objections, please let me know.

---8<------------------------------------------------------------

From: Al Viro <viro@xxxxxxxxxxxxxxxxxx>

commit 5a1c7f47da9b32d0671e776b0f388095b7f91e2e upstream.

applying le32_to_cpu() to 16bit value is a bad idea...

Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
---
fs/ext4/symlink.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ext4/symlink.c b/fs/ext4/symlink.c
index c677f2c..3627fd7 100644
--- a/fs/ext4/symlink.c
+++ b/fs/ext4/symlink.c
@@ -52,7 +52,7 @@ static const char *ext4_encrypted_follow_link(struct dentry *dentry, void **cook
/* Symlink is encrypted */
sd = (struct ext4_encrypted_symlink_data *)caddr;
cstr.name = sd->encrypted_path;
- cstr.len = le32_to_cpu(sd->len);
+ cstr.len = le16_to_cpu(sd->len);
if ((cstr.len +
sizeof(struct ext4_encrypted_symlink_data) - 1) >
max_size) {
--
1.9.1