linux-kernel - [RFC][PATCH 1/4] fs: preserve S_IMA inode flag in fsstack_copy_attr

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Message-Id: <1304084515-22132-2-git-send-email-roberto.sassu@polito.it>
Date:	Fri, 29 Apr 2011 15:41:49 +0200
From:	Roberto Sassu <roberto.sassu@...ito.it>
To:	linux-security-module@...r.kernel.org
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	dhowells@...hat.com, jmorris@...ei.org, zohar@...ux.vnet.ibm.com,
	safford@...son.ibm.com, tyhicks@...ux.vnet.ibm.com,
	kirkland@...onical.com, ecryptfs-devel@...ts.launchpad.net,
	casey@...aufler-ca.com, eparis@...hat.com, sds@...ho.nsa.gov,
	selinux@...ho.nsa.gov, viro@...iv.linux.org.uk,
	john.johansen@...onical.com, apparmor@...ts.ubuntu.com,
	Roberto Sassu <roberto.sassu@...ito.it>
Subject: [RFC][PATCH 1/4] fs: preserve S_IMA inode flag in fsstack_copy_attr_all()

The S_IMA inode flag of the upper inode must be preserved to avoid IMA
tries to free its own structure for inodes that were not measured before.

Signed-off-by: Roberto Sassu <roberto.sassu@...ito.it>
---
 fs/stack.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/stack.c b/fs/stack.c
index 4a6f7f4..a6deb1c 100644
--- a/fs/stack.c
+++ b/fs/stack.c
@@ -73,7 +73,7 @@ void fsstack_copy_attr_all(struct inode *dest, const struct inode *src)
 	dest->i_mtime = src->i_mtime;
 	dest->i_ctime = src->i_ctime;
 	dest->i_blkbits = src->i_blkbits;
-	dest->i_flags = src->i_flags;
+	dest->i_flags = (src->i_flags & ~S_IMA) + (dest->i_flags & S_IMA);
 	dest->i_nlink = src->i_nlink;
 }
 EXPORT_SYMBOL_GPL(fsstack_copy_attr_all);
-- 
1.7.4.4


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