linux-kernel - [RFC PATCH 20/20] selinux: selinuxfs: avoid implicit conversions

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Date:   Thu,  6 Jul 2023 15:23:35 +0200
From:   Christian Göttsche <cgzones@...glemail.com>
To:     selinux@...r.kernel.org
Cc:     Paul Moore <paul@...l-moore.com>,
        Stephen Smalley <stephen.smalley.work@...il.com>,
        Eric Paris <eparis@...isplace.org>,
        linux-kernel@...r.kernel.org
Subject: [RFC PATCH 20/20] selinux: selinuxfs: avoid implicit conversions

Use unsigned loop counters where the upper bound is of unsigned
type.

Signed-off-by: Christian Göttsche <cgzones@...glemail.com>
---
 security/selinux/selinuxfs.c | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index 88d856f5c6bc..a2dc415779ae 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -1074,7 +1074,7 @@ static ssize_t sel_write_user(struct file *file, char *buf, size_t size)
 	u32 sid, *sids = NULL;
 	ssize_t length;
 	char *newcon;
-	int i, rc;
+	int rc;
 	u32 len, nsids;
 
 	length = avc_has_perm(current_sid(), SECINITSID_SECURITY,
@@ -1107,7 +1107,7 @@ static ssize_t sel_write_user(struct file *file, char *buf, size_t size)
 
 	length = sprintf(buf, "%u", nsids) + 1;
 	ptr = buf + length;
-	for (i = 0; i < nsids; i++) {
+	for (u32 i = 0; i < nsids; i++) {
 		rc = security_sid_to_context(sids[i], &newcon, &len);
 		if (rc) {
 			length = rc;
@@ -1612,7 +1612,6 @@ static int sel_make_avc_files(struct dentry *dir)
 {
 	struct super_block *sb = dir->d_sb;
 	struct selinux_fs_info *fsi = sb->s_fs_info;
-	int i;
 	static const struct tree_descr files[] = {
 		{ "cache_threshold",
 		  &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR },
@@ -1622,7 +1621,7 @@ static int sel_make_avc_files(struct dentry *dir)
 #endif
 	};
 
-	for (i = 0; i < ARRAY_SIZE(files); i++) {
+	for (u32 i = 0; i < ARRAY_SIZE(files); i++) {
 		struct inode *inode;
 		struct dentry *dentry;
 
@@ -1648,12 +1647,11 @@ static int sel_make_ss_files(struct dentry *dir)
 {
 	struct super_block *sb = dir->d_sb;
 	struct selinux_fs_info *fsi = sb->s_fs_info;
-	int i;
 	static const struct tree_descr files[] = {
 		{ "sidtab_hash_stats", &sel_sidtab_hash_stats_ops, S_IRUGO },
 	};
 
-	for (i = 0; i < ARRAY_SIZE(files); i++) {
+	for (u32 i = 0; i < ARRAY_SIZE(files); i++) {
 		struct inode *inode;
 		struct dentry *dentry;
 
@@ -1699,9 +1697,7 @@ static const struct file_operations sel_initcon_ops = {
 
 static int sel_make_initcon_files(struct dentry *dir)
 {
-	int i;
-
-	for (i = 1; i <= SECINITSID_NUM; i++) {
+	for (u32 i = 1; i <= SECINITSID_NUM; i++) {
 		struct inode *inode;
 		struct dentry *dentry;
 		const char *s = security_get_initial_sid_context(i);
-- 
2.40.1