linux-kernel - [PATCH 2/5] selinux: use correct type for context length

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Message-Id: <20220217142133.72205-1-cgzones@googlemail.com>
Date:   Thu, 17 Feb 2022 15:21:25 +0100
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>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Ondrej Mosnacek <omosnace@...hat.com>,
        Austin Kim <austin.kim@....com>,
        Kees Cook <keescook@...omium.org>,
        Yang Li <yang.lee@...ux.alibaba.com>,
        Casey Schaufler <casey@...aufler-ca.com>,
        linux-kernel@...r.kernel.org, llvm@...ts.linux.dev
Subject: [PATCH 2/5] selinux: use correct type for context length

security_sid_to_context() expects a pointer to an u32 as the address
where to store the length of the computed context.

Reported by sparse:

    security/selinux/xfrm.c:359:39: warning: incorrect type in argument 4 (different signedness)
    security/selinux/xfrm.c:359:39:    expected unsigned int [usertype] *scontext_len
    security/selinux/xfrm.c:359:39:    got int *

Signed-off-by: Christian Göttsche <cgzones@...glemail.com>
---
 security/selinux/xfrm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/security/selinux/xfrm.c b/security/selinux/xfrm.c
index 90697317895f..c576832febc6 100644
--- a/security/selinux/xfrm.c
+++ b/security/selinux/xfrm.c
@@ -347,7 +347,7 @@ int selinux_xfrm_state_alloc_acquire(struct xfrm_state *x,
 	int rc;
 	struct xfrm_sec_ctx *ctx;
 	char *ctx_str = NULL;
-	int str_len;
+	u32 str_len;
 
 	if (!polsec)
 		return 0;
-- 
2.35.1