linux-kernel - [PATCH 5/5] security/selinux/ss: correct size computation

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Date:	Sun, 6 Dec 2009 10:16:51 +0100 (CET)
From:	Julia Lawall <julia@...u.dk>
To:	Stephen Smalley <sds@...ho.nsa.gov>,
	James Morris <jmorris@...ei.org>,
	Eric Paris <eparis@...isplace.org>,
	linux-security-module@...r.kernel.org,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH 5/5] security/selinux/ss: correct size computation

From: Julia Lawall <julia@...u.dk>

The size argument to kcalloc should be the size of desired structure,
not the pointer to it.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@expression@
expression *x;
@@

x =
 <+...
-sizeof(x)
+sizeof(*x)
...+>// </smpl>

Signed-off-by: Julia Lawall <julia@...u.dk>

---
 security/selinux/ss/services.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff -u -p a/security/selinux/ss/services.c b/security/selinux/ss/services.c
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -2555,7 +2555,7 @@ int security_get_classes(char ***classes
 	read_lock(&policy_rwlock);
 
 	*nclasses = policydb.p_classes.nprim;
-	*classes = kcalloc(*nclasses, sizeof(*classes), GFP_ATOMIC);
+	*classes = kcalloc(*nclasses, sizeof(**classes), GFP_ATOMIC);
 	if (!*classes)
 		goto out;
 
@@ -2602,7 +2602,7 @@ int security_get_permissions(char *class
 	}
 
 	*nperms = match->permissions.nprim;
-	*perms = kcalloc(*nperms, sizeof(*perms), GFP_ATOMIC);
+	*perms = kcalloc(*nperms, sizeof(**perms), GFP_ATOMIC);
 	if (!*perms)
 		goto out;
 
--
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