linux-kernel - [PATCH v3 5/7] selinux: avoid implicit conversions in selinuxfs code

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Message-Id: <20230807171143.208481-4-cgzones@googlemail.com>
Date:   Mon,  7 Aug 2023 19:11:39 +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: [PATCH v3 5/7] selinux: avoid implicit conversions in selinuxfs code

Use umode_t as parameter type for sel_make_inode(), which assigns the
value to the member i_mode of struct inode.

Use identical and unsigned types for loop iterators.

Signed-off-by: Christian Göttsche <cgzones@...glemail.com>
---
v3:
  - drop leftover declaration in init-clauses of for loops
  - use unsigned int instead of u32 for loop iterator with loop bounds
    known at compile time to be small (<100)
v2: avoid declarations in init-clauses of for loops
---
 security/selinux/selinuxfs.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index b969e87fd870..107b028d5e40 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -97,7 +97,7 @@ static int selinux_fs_info_create(struct super_block *sb)
 static void selinux_fs_info_free(struct super_block *sb)
 {
 	struct selinux_fs_info *fsi = sb->s_fs_info;
-	int i;
+	unsigned int i;
 
 	if (fsi) {
 		for (i = 0; i < fsi->bool_num; i++)
@@ -1075,8 +1075,8 @@ 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;
-	u32 len, nsids;
+	int rc;
+	u32 i, len, nsids;
 
 	length = avc_has_perm(current_sid(), SECINITSID_SECURITY,
 			      SECCLASS_SECURITY, SECURITY__COMPUTE_USER,
@@ -1192,7 +1192,7 @@ static ssize_t sel_write_member(struct file *file, char *buf, size_t size)
 	return length;
 }
 
-static struct inode *sel_make_inode(struct super_block *sb, int mode)
+static struct inode *sel_make_inode(struct super_block *sb, umode_t mode)
 {
 	struct inode *ret = new_inode(sb);
 
@@ -1613,7 +1613,7 @@ 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;
+	unsigned int i;
 	static const struct tree_descr files[] = {
 		{ "cache_threshold",
 		  &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR },
@@ -1649,7 +1649,7 @@ 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;
+	unsigned int i;
 	static const struct tree_descr files[] = {
 		{ "sidtab_hash_stats", &sel_sidtab_hash_stats_ops, S_IRUGO },
 	};
@@ -1700,7 +1700,7 @@ static const struct file_operations sel_initcon_ops = {
 
 static int sel_make_initcon_files(struct dentry *dir)
 {
-	int i;
+	unsigned int i;
 
 	for (i = 1; i <= SECINITSID_NUM; i++) {
 		struct inode *inode;
-- 
2.40.1