[13/46] selinux: Move four assignments for the variable "rc" in genfs_read()
diff mbox

Message ID 99ebe15e-c30f-d129-82a0-a809769aa5dc@users.sourceforge.net
State New
Headers show

Commit Message

SF Markus Elfring Jan. 15, 2017, 3:13 p.m. UTC
From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sat, 14 Jan 2017 17:21:59 +0100

One local variable was set to an error code in four cases before
a concrete error situation was detected. Thus move the corresponding
assignments into if branches to indicate a software failure there.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
 security/selinux/ss/policydb.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

Comments

Paul Moore March 23, 2017, 9:50 p.m. UTC | #1
On Sun, Jan 15, 2017 at 10:13 AM, SF Markus Elfring
<elfring@users.sourceforge.net> wrote:
> From: Markus Elfring <elfring@users.sourceforge.net>
> Date: Sat, 14 Jan 2017 17:21:59 +0100
>
> One local variable was set to an error code in four cases before
> a concrete error situation was detected. Thus move the corresponding
> assignments into if branches to indicate a software failure there.
>
> Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
> ---
>  security/selinux/ss/policydb.c | 16 ++++++++--------
>  1 file changed, 8 insertions(+), 8 deletions(-)

See my previous comments.

> diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c
> index 7544e374dec9..a12d9166f0e4 100644
> --- a/security/selinux/ss/policydb.c
> +++ b/security/selinux/ss/policydb.c
> @@ -2012,11 +2012,11 @@ static int genfs_read(struct policydb *p, void *fp)
>                 if (rc)
>                         goto out;
>                 len = le32_to_cpu(buf[0]);
> -
> -               rc = -ENOMEM;
>                 newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL);
> -               if (!newgenfs)
> +               if (!newgenfs) {
> +                       rc = -ENOMEM;
>                         goto out;
> +               }
>
>                 rc = str_read(&newgenfs->fstype, GFP_KERNEL, fp, len);
>                 if (rc)
> @@ -2024,10 +2024,10 @@ static int genfs_read(struct policydb *p, void *fp)
>
>                 for (genfs_p = NULL, genfs = p->genfs; genfs;
>                      genfs_p = genfs, genfs = genfs->next) {
> -                       rc = -EINVAL;
>                         if (strcmp(newgenfs->fstype, genfs->fstype) == 0) {
>                                 printk(KERN_ERR "SELinux:  dup genfs fstype %s\n",
>                                        newgenfs->fstype);
> +                               rc = -EINVAL;
>                                 goto out;
>                         }
>                         if (strcmp(newgenfs->fstype, genfs->fstype) < 0)
> @@ -2051,11 +2051,11 @@ static int genfs_read(struct policydb *p, void *fp)
>                         if (rc)
>                                 goto out;
>                         len = le32_to_cpu(buf[0]);
> -
> -                       rc = -ENOMEM;
>                         newc = kzalloc(sizeof(*newc), GFP_KERNEL);
> -                       if (!newc)
> +                       if (!newc) {
> +                               rc = -ENOMEM;
>                                 goto out;
> +                       }
>
>                         rc = str_read(&newc->u.name, GFP_KERNEL, fp, len);
>                         if (rc)
> @@ -2072,12 +2072,12 @@ static int genfs_read(struct policydb *p, void *fp)
>
>                         for (l = NULL, c = genfs->head; c;
>                              l = c, c = c->next) {
> -                               rc = -EINVAL;
>                                 if (!strcmp(newc->u.name, c->u.name) &&
>                                     (!c->v.sclass || !newc->v.sclass ||
>                                      newc->v.sclass == c->v.sclass)) {
>                                         printk(KERN_ERR "SELinux:  dup genfs entry (%s,%s)\n",
>                                                genfs->fstype, c->u.name);
> +                                       rc = -EINVAL;
>                                         goto out;
>                                 }
>                                 len = strlen(newc->u.name);
> --
> 2.11.0
>

Patch
diff mbox

diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c
index 7544e374dec9..a12d9166f0e4 100644
--- a/security/selinux/ss/policydb.c
+++ b/security/selinux/ss/policydb.c
@@ -2012,11 +2012,11 @@  static int genfs_read(struct policydb *p, void *fp)
 		if (rc)
 			goto out;
 		len = le32_to_cpu(buf[0]);
-
-		rc = -ENOMEM;
 		newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL);
-		if (!newgenfs)
+		if (!newgenfs) {
+			rc = -ENOMEM;
 			goto out;
+		}
 
 		rc = str_read(&newgenfs->fstype, GFP_KERNEL, fp, len);
 		if (rc)
@@ -2024,10 +2024,10 @@  static int genfs_read(struct policydb *p, void *fp)
 
 		for (genfs_p = NULL, genfs = p->genfs; genfs;
 		     genfs_p = genfs, genfs = genfs->next) {
-			rc = -EINVAL;
 			if (strcmp(newgenfs->fstype, genfs->fstype) == 0) {
 				printk(KERN_ERR "SELinux:  dup genfs fstype %s\n",
 				       newgenfs->fstype);
+				rc = -EINVAL;
 				goto out;
 			}
 			if (strcmp(newgenfs->fstype, genfs->fstype) < 0)
@@ -2051,11 +2051,11 @@  static int genfs_read(struct policydb *p, void *fp)
 			if (rc)
 				goto out;
 			len = le32_to_cpu(buf[0]);
-
-			rc = -ENOMEM;
 			newc = kzalloc(sizeof(*newc), GFP_KERNEL);
-			if (!newc)
+			if (!newc) {
+				rc = -ENOMEM;
 				goto out;
+			}
 
 			rc = str_read(&newc->u.name, GFP_KERNEL, fp, len);
 			if (rc)
@@ -2072,12 +2072,12 @@  static int genfs_read(struct policydb *p, void *fp)
 
 			for (l = NULL, c = genfs->head; c;
 			     l = c, c = c->next) {
-				rc = -EINVAL;
 				if (!strcmp(newc->u.name, c->u.name) &&
 				    (!c->v.sclass || !newc->v.sclass ||
 				     newc->v.sclass == c->v.sclass)) {
 					printk(KERN_ERR "SELinux:  dup genfs entry (%s,%s)\n",
 					       genfs->fstype, c->u.name);
+					rc = -EINVAL;
 					goto out;
 				}
 				len = strlen(newc->u.name);