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[PATCH] selinux: MLS compatibility

This patch enables files created on a MLS-enabled SELinux system to be
accessible on a non-MLS SELinux system, by skipping the MLS component of
the security context in the non-MLS case.

Signed-off-by:  Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by:  James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Stephen Smalley há 19 anos atrás
pai
commit
e517a0cd85
1 ficheiros alterados com 4 adições e 1 exclusões
  1. 4 1
      security/selinux/ss/mls.c

+ 4 - 1
security/selinux/ss/mls.c

@@ -262,8 +262,11 @@ int mls_context_to_sid(char oldc,
 	struct cat_datum *catdatum, *rngdatum;
 	int l, rc = -EINVAL;
 
-	if (!selinux_mls_enabled)
+	if (!selinux_mls_enabled) {
+		if (def_sid != SECSID_NULL && oldc)
+			*scontext += strlen(*scontext);
 		return 0;
+	}
 
 	/*
 	 * No MLS component to the security context, try and map to