[PATCH 4.4 20/72] selinux: Remove unnecessary check of array base in selinux_set_mapping()

[Greg Kroah-Hartman]

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Matthias Kaehlcke <mka@xxxxxxxxxxxx>

commit 342e91578eb6909529bc7095964cd44b9c057c4e upstream.

'perms' will never be NULL since it isn't a plain pointer but an array
of u32 values.

This fixes the following warning when building with clang:

security/selinux/ss/services.c:158:16: error: address of array
'p_in->perms' will always evaluate to 'true'
[-Werror,-Wpointer-bool-conversion]
                while (p_in->perms && p_in->perms[k]) {

Signed-off-by: Matthias Kaehlcke <mka@xxxxxxxxxxxx>
Signed-off-by: Paul Moore <paul@xxxxxxxxxxxxxx>
Cc: Nathan Chancellor <natechancellor@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 security/selinux/ss/services.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -155,7 +155,7 @@ static int selinux_set_mapping(struct po
 		}
 
 		k = 0;
-		while (p_in->perms && p_in->perms[k]) {
+		while (p_in->perms[k]) {
 			/* An empty permission string skips ahead */
 			if (!*p_in->perms[k]) {
 				k++;