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From:   =?UTF-8?q?Christian=20G=C3=B6ttsche?= <cgzones@googlemail.com>
To:     selinux@vger.kernel.org
Cc:     Paul Moore <paul@paul-moore.com>,
        Stephen Smalley <stephen.smalley.work@gmail.com>,
        Eric Paris <eparis@parisplace.org>,
        Nathan Chancellor <nathan@kernel.org>,
        Nick Desaulniers <ndesaulniers@google.com>,
        Ondrej Mosnacek <omosnace@redhat.com>,
        Xiong Zhenwu <xiong.zhenwu@zte.com.cn>,
        Tyler Hicks <tyhicks@linux.microsoft.com>,
        Serge Hallyn <serge@hallyn.com>,
        Austin Kim <austin.kim@lge.com>,
        Yang Li <yang.lee@linux.alibaba.com>,
        Lakshmi Ramasubramanian <nramas@linux.microsoft.com>,
        Jeff Vander Stoep <jeffv@google.com>,
        linux-kernel@vger.kernel.org, llvm@lists.linux.dev
Subject: [PATCH 2/9] selinux: declare path parameters of _genfs_sid const
Date:   Tue, 25 Jan 2022 15:14:12 +0100
Message-Id: <20220125141422.32655-1-cgzones@googlemail.com>
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Precedence: bulk

The path parameter is only read from in security_genfs_sid(),
selinux_policy_genfs_sid() and __security_genfs_sid(). Since a string
literal is passed as argument, declare the parameter const.
Also align the parameter names in the declaration and definition.

Reported by clang [-Wwrite-strings]:

    security/selinux/hooks.c:553:60: error: passing 'const char [2]' to parameter of type 'char *' discards qualifiers [-Wincompatible-pointer-types-discards-qualifiers]
            rc = security_genfs_sid(&selinux_state, sb->s_type->name, /,
                                                                      ^~~
    ./security/selinux/include/security.h:389:36: note: passing argument to parameter 'name' here
                           const char *fstype, char *name, u16 sclass,
                                                     ^

Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
---
 security/selinux/include/security.h | 4 ++--
 security/selinux/ss/services.c      | 6 +++---
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/security/selinux/include/security.h b/security/selinux/include/security.h
index ac0ece01305a..6482e0efb368 100644
--- a/security/selinux/include/security.h
+++ b/security/selinux/include/security.h
@@ -386,11 +386,11 @@ int security_get_allow_unknown(struct selinux_state *state);
 int security_fs_use(struct selinux_state *state, struct super_block *sb);
 
 int security_genfs_sid(struct selinux_state *state,
-		       const char *fstype, char *name, u16 sclass,
+		       const char *fstype, const char *path, u16 sclass,
 		       u32 *sid);
 
 int selinux_policy_genfs_sid(struct selinux_policy *policy,
-		       const char *fstype, char *name, u16 sclass,
+		       const char *fstype, const char *path, u16 sclass,
 		       u32 *sid);
 
 #ifdef CONFIG_NETLABEL
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index 8e92af7dd284..5a7df45bdab1 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -2875,7 +2875,7 @@ int security_get_user_sids(struct selinux_state *state,
  */
 static inline int __security_genfs_sid(struct selinux_policy *policy,
 				       const char *fstype,
-				       char *path,
+				       const char *path,
 				       u16 orig_sclass,
 				       u32 *sid)
 {
@@ -2928,7 +2928,7 @@ static inline int __security_genfs_sid(struct selinux_policy *policy,
  */
 int security_genfs_sid(struct selinux_state *state,
 		       const char *fstype,
-		       char *path,
+		       const char *path,
 		       u16 orig_sclass,
 		       u32 *sid)
 {
@@ -2952,7 +2952,7 @@ int security_genfs_sid(struct selinux_state *state,
 
 int selinux_policy_genfs_sid(struct selinux_policy *policy,
 			const char *fstype,
-			char *path,
+			const char *path,
 			u16 orig_sclass,
 			u32 *sid)
 {
-- 
2.34.1