[PATCH] fix an endianness bug in ext4_encrypted_follow_link()

From: Al Viro
Date: Thu Nov 26 2015 - 10:27:35 EST


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

Cc: stable@xxxxxxxxxxxxxxx # v4.1+
Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
---

diff --git a/fs/ext4/symlink.c b/fs/ext4/symlink.c
index abe2401..e8e7af6 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) {
--
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