linux-kernel - [PATCH 1/5] apparmor: Remove redundant assignments

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Date:   Thu, 31 Mar 2022 19:33:54 +0200
From:   Michal Orzel <michalorzel.eng@...il.com>
To:     John Johansen <john.johansen@...onical.com>,
        James Morris <jmorris@...ei.org>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     Michal Orzel <michalorzel.eng@...il.com>,
        linux-security-module@...r.kernel.org,
        linux-kernel@...r.kernel.org, llvm@...ts.linux.dev
Subject: [PATCH 1/5] apparmor: Remove redundant assignments

Get rid of redundant assignments which end up in values not being
read either because they are overwritten or the function ends.

Reported by clang-tidy [deadcode.DeadStores]

Signed-off-by: Michal Orzel <michalorzel.eng@...il.com>
---
 security/apparmor/domain.c | 3 +--
 security/apparmor/label.c  | 2 +-
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/security/apparmor/domain.c b/security/apparmor/domain.c
index a29e69d2c300..77724acd9d8a 100644
--- a/security/apparmor/domain.c
+++ b/security/apparmor/domain.c
@@ -627,7 +627,6 @@ static struct aa_label *profile_transition(struct aa_profile *profile,
 {
 	struct aa_label *new = NULL;
 	const char *info = NULL, *name = NULL, *target = NULL;
-	unsigned int state = profile->file.start;
 	struct aa_perms perms = {};
 	bool nonewprivs = false;
 	int error = 0;
@@ -661,7 +660,7 @@ static struct aa_label *profile_transition(struct aa_profile *profile,
 	}
 
 	/* find exec permissions for name */
-	state = aa_str_perms(profile->file.dfa, state, name, cond, &perms);
+	aa_str_perms(profile->file.dfa, profile->file.start, name, cond, &perms);
 	if (perms.allow & MAY_EXEC) {
 		/* exec permission determine how to transition */
 		new = x_to_label(profile, bprm, name, perms.xindex, &target,
diff --git a/security/apparmor/label.c b/security/apparmor/label.c
index 0b0265da1926..ce9ae9b6b303 100644
--- a/security/apparmor/label.c
+++ b/security/apparmor/label.c
@@ -807,7 +807,7 @@ bool aa_label_replace(struct aa_label *old, struct aa_label *new)
 		struct aa_labelset *ls = labels_set(old);
 
 		write_lock_irqsave(&ls->lock, flags);
-		res = __label_remove(old, new);
+		__label_remove(old, new);
 		if (labels_ns(old) != labels_ns(new)) {
 			write_unlock_irqrestore(&ls->lock, flags);
 			ls = labels_set(new);
-- 
2.25.1