From: Al Viro <viro@ZenIV.linux.org.uk>
Date: Thu, 26 Nov 2015 20:20:50 +0000 (-0500)
Subject: ext4: fix an endianness bug in ext4_encrypted_follow_link()
X-Git-Tag: firefly_0821_release~176^2~594^2~2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=5a1c7f47da9b32d0671e776b0f388095b7f91e2e;p=firefly-linux-kernel-4.4.55.git
ext4: fix an endianness bug in ext4_encrypted_follow_link()
applying le32_to_cpu() to 16bit value is a bad idea...
Cc: stable@vger.kernel.org # v4.1+
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
diff --git a/fs/ext4/symlink.c b/fs/ext4/symlink.c
index abe2401ce405..e8e7af62ac95 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) {