linux-kernel - [PATCH] securityfs: securityfs_remove should handle IS

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Message-ID: <20090512004714.4111.46789.stgit@dhcp231-142.rdu.redhat.com>
Date:	Mon, 11 May 2009 20:47:15 -0400
From:	Eric Paris <eparis@...hat.com>
To:	jmorris@...ei.org
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] securityfs: securityfs_remove should handle IS_ERR pointers

Both of the securityfs users (TPM and IMA) can call securityfs_remove and pass
an IS_ERR(dentry) in their failure paths.  This patch handles those rather
than panicing when it tries to start deferencing some negative memory.

Signed-off-by: Eric Paris <eparis@...hat.com>
---

 security/inode.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/security/inode.c b/security/inode.c
index f3b91bf..f7496c6 100644
--- a/security/inode.c
+++ b/security/inode.c
@@ -287,7 +287,7 @@ void securityfs_remove(struct dentry *dentry)
 {
 	struct dentry *parent;
 
-	if (!dentry)
+	if (!dentry || IS_ERR(dentry))
 		return;
 
 	parent = dentry->d_parent;

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