From: Theodore Ts'o <tytso@mit.edu>
To: Ext4 Developers List <linux-ext4@vger.kernel.org>
Cc: jaegeuk@kernel.org, mhalcrow@google.com, Theodore Ts'o <tytso@mit.edu>
Subject: [PATCH 10/22] ext4 crypto: validate context consistency on lookup
Date: Thu, 2 Apr 2015 18:10:47 -0400 [thread overview]
Message-ID: <1428012659-12709-11-git-send-email-tytso@mit.edu> (raw)
In-Reply-To: <1428012659-12709-1-git-send-email-tytso@mit.edu>
Change-Id: Ifb904b2bec9300b178062ee70cbdfd333f03f865
Signed-off-by: Michael Halcrow <mhalcrow@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
fs/ext4/namei.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 2fb55fd..12d2592 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1418,6 +1418,13 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, unsi
return ERR_PTR(-EIO);
}
}
+ if (ext4_encrypted_inode(dir) &&
+ !ext4_is_child_context_consistent_with_parent(dir,
+ dentry->d_inode)) {
+ printk(KERN_ERR "%s: Security warning: Inconsistent contexts\n",
+ __func__);
+ return ERR_PTR(-EINVAL);
+ }
return d_splice_alias(inode, dentry);
}
--
2.3.0
next prev parent reply other threads:[~2015-04-02 22:13 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-02 22:10 [PATCH 00/22] ext4 encryption patches Theodore Ts'o
2015-04-02 22:10 ` [PATCH 01/22] ext4: add ext4_mpage_readpages() Theodore Ts'o
2015-04-06 21:08 ` Andreas Dilger
2015-04-08 3:04 ` Theodore Ts'o
2015-04-02 22:10 ` [PATCH 02/22] ext4: reserve codepoints used by the ext4 encryption feature Theodore Ts'o
2015-04-02 22:10 ` [PATCH 03/22] ext4 crypto: add ext4 encryption Kconfig Theodore Ts'o
2015-04-02 22:10 ` [PATCH 04/22] ext4 crypto: export ext4_empty_dir() Theodore Ts'o
2015-04-02 22:10 ` [PATCH 05/22] ext4 crypto: add encryption xattr support Theodore Ts'o
2015-04-02 22:10 ` [PATCH 06/22] ext4 crypto: add encryption policy checking Theodore Ts'o
2015-04-06 21:31 ` Andreas Dilger
2015-04-11 13:06 ` Theodore Ts'o
2015-04-11 13:18 ` Theodore Ts'o
2015-04-08 18:07 ` Andreas Dilger
2015-04-11 13:10 ` Theodore Ts'o
2015-04-02 22:10 ` [PATCH 07/22] ext4 crypto: add ioctl to set encryption policy Theodore Ts'o
2015-04-02 22:10 ` [PATCH 08/22] ext4 crypto: add ext4 encryption facilities Theodore Ts'o
2015-04-09 12:54 ` Maurizio Lombardi
2015-04-11 12:50 ` Theodore Ts'o
2015-04-02 22:10 ` [PATCH 09/22] ext4 crypto: add encryption key management facilities Theodore Ts'o
2015-04-02 22:10 ` Theodore Ts'o [this message]
2015-04-02 22:10 ` [PATCH 11/22] ext4 crypto: inherit encryption policies on inode and directory create Theodore Ts'o
2015-04-02 22:10 ` [PATCH 12/22] ext4 crypto: implement the ext4 encryption write path Theodore Ts'o
2015-04-09 21:44 ` Andreas Dilger
2015-04-11 13:17 ` Theodore Ts'o
2015-04-02 22:10 ` [PATCH 13/22] ext4 crypto: implement the ext4 decryption read path Theodore Ts'o
2015-04-08 18:51 ` Andreas Dilger
2015-04-11 13:38 ` Theodore Ts'o
2015-04-02 22:10 ` [PATCH 14/22] ext4 crypto: filename encryption facilities Theodore Ts'o
2015-04-02 22:10 ` [PATCH 15/22] ext4: teach ext4_htree_store_dirent() to store decrypted filenames Theodore Ts'o
2015-04-02 22:10 ` [PATCH 16/22] ext4 crypto: insert encrypted filenames into a leaf directory block Theodore Ts'o
2015-04-02 22:10 ` [PATCH 17/22] ext4 crypto: partial update to namei.c for fname crypto Theodore Ts'o
2015-04-08 17:44 ` Andreas Dilger
2015-04-12 5:06 ` Theodore Ts'o
2015-04-02 22:10 ` [PATCH 18/22] ext4 crypto: filename encryption modifications Theodore Ts'o
2015-04-02 22:10 ` [PATCH 19/22] ext4 crypto: enable filename encryption Theodore Ts'o
2015-04-08 18:38 ` Andreas Dilger
2015-04-02 22:10 ` [PATCH 20/22] ext4 crypto: Add symlink encryption Theodore Ts'o
2015-04-08 17:58 ` Andreas Dilger
2015-04-12 5:29 ` Theodore Ts'o
2015-04-02 22:10 ` [PATCH 21/22] ext4 crypto: enable encryption feature flag Theodore Ts'o
2015-04-02 22:10 ` [PATCH 22/22] ext4 crypto: add password salt support Theodore Ts'o
2015-04-03 1:57 ` [PATCH 00/22] ext4 encryption patches Theodore Ts'o
2015-04-06 20:28 ` Jonathan Corbet
2015-04-08 3:07 ` Theodore Ts'o
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