linux-kernel - [PATCH 3/8] ima: return d_name.name if d

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Date:	Fri, 28 Feb 2014 16:59:27 +0200
From:	Dmitry Kasatkin <d.kasatkin@...sung.com>
To:	linux-security-module@...r.kernel.org, zohar@...ux.vnet.ibm.com
Cc:	jmorris@...ei.org, linux-kernel@...r.kernel.org,
	casey.schaufler@...el.com, dmitry.kasatkin@...il.com,
	Dmitry Kasatkin <d.kasatkin@...sung.com>
Subject: [PATCH 3/8] ima: return d_name.name if d_path fails

Signed-off-by: Dmitry Kasatkin <d.kasatkin@...sung.com>
---
 security/integrity/ima/ima_api.c  | 2 +-
 security/integrity/ima/ima_main.c | 7 +------
 2 files changed, 2 insertions(+), 7 deletions(-)

diff --git a/security/integrity/ima/ima_api.c b/security/integrity/ima/ima_api.c
index c6b4a73..ba9e4d7 100644
--- a/security/integrity/ima/ima_api.c
+++ b/security/integrity/ima/ima_api.c
@@ -332,5 +332,5 @@ const char *ima_d_path(struct path *path, char **pathbuf)
 			pathname = NULL;
 		}
 	}
-	return pathname;
+	return pathname ?: (const char *)path->dentry->d_name.name;
 }
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index 50413d0..52ac6cf 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -79,7 +79,6 @@ __setup("ima_hash=", hash_setup);
  */
 static void ima_rdwr_violation_check(struct file *file)
 {
-	struct dentry *dentry = file->f_path.dentry;
 	struct inode *inode = file_inode(file);
 	fmode_t mode = file->f_mode;
 	int must_measure;
@@ -111,8 +110,6 @@ out:
 		return;
 
 	pathname = ima_d_path(&file->f_path, &pathbuf);
-	if (!pathname || strlen(pathname) > IMA_EVENT_NAME_LEN_MAX)
-		pathname = dentry->d_name.name;
 
 	if (send_tomtou)
 		ima_add_violation(file, pathname, "invalid_pcr", "ToMToU");
@@ -220,9 +217,7 @@ static int process_measurement(struct file *file, const char *filename,
 	if (rc != 0)
 		goto out_digsig;
 
-	pathname = !filename ? ima_d_path(&file->f_path, &pathbuf) : filename;
-	if (!pathname)
-		pathname = (const char *)file->f_dentry->d_name.name;
+	pathname = filename ?: ima_d_path(&file->f_path, &pathbuf);
 
 	if (action & IMA_MEASURE)
 		ima_store_measurement(iint, file, pathname,
-- 
1.8.3.2

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