linux-ext4 - [PATCH 6/8] ext4 crypto: policies may only be set on directories

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Message-Id: <1432856867-5710-6-git-send-email-tytso@mit.edu>
Date:	Thu, 28 May 2015 19:47:45 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Ext4 Developers List <linux-ext4@...r.kernel.org>
Cc:	jaegeuk@...nel.org, mhalcrow@...gle.com,
	Theodore Ts'o <tytso@....edu>, Chao Yu <chao2.yu@...sung.com>
Subject: [PATCH 6/8] ext4 crypto: policies may only be set on directories

Thanks to Chao Yu <chao2.yu@...sung.com> for pointing out we were
missing this check.

Signed-off-by: Theodore Ts'o <tytso@....edu>
---
 fs/ext4/crypto_policy.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/ext4/crypto_policy.c b/fs/ext4/crypto_policy.c
index 81980a15..a1d434d 100644
--- a/fs/ext4/crypto_policy.c
+++ b/fs/ext4/crypto_policy.c
@@ -93,6 +93,8 @@ int ext4_process_policy(const struct ext4_encryption_policy *policy,
 		return -EINVAL;
 
 	if (!ext4_inode_has_encryption_context(inode)) {
+		if (!S_ISDIR(inode->i_mode))
+			return -EINVAL;
 		if (!ext4_empty_dir(inode))
 			return -ENOTEMPTY;
 		return ext4_create_encryption_context_from_policy(inode,
-- 
2.3.0

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