[PATCH 3/4] seccomp: avoid overflow in implicit constant conversion

[Christian Brauner]

USER_NOTIF_MAGIC is assigned to int variables in this test so set it to INT_MAX
to avoid warnings:

seccomp_bpf.c: In function ‘user_notification_continue’:
seccomp_bpf.c:3088:26: warning: overflow in implicit constant conversion 
[-Woverflow]
 #define USER_NOTIF_MAGIC 116983961184613L
                          ^
seccomp_bpf.c:3572:15: note: in expansion of macro ‘USER_NOTIF_MAGIC’
  resp.error = USER_NOTIF_MAGIC;
               ^~~~~~~~~~~~~~~~

Fixes: 6a21cc50f0c7 ("seccomp: add a return code to trap to userspace")
Signed-off-by: Christian Brauner <christian.brau...@ubuntu.com>
Cc: Kees Cook <keesc...@chromium.org>
Cc: Andy Lutomirski <l...@amacapital.net>
Cc: Will Drewry <w...@chromium.org>
Cc: Shuah Khan <sh...@kernel.org>
Cc: Alexei Starovoitov <a...@kernel.org>
Cc: Daniel Borkmann <dan...@iogearbox.net>
Cc: Martin KaFai Lau <ka...@fb.com>
Cc: Song Liu <songliubrav...@fb.com>
Cc: Yonghong Song <y...@fb.com>
Cc: Tycho Andersen <ty...@tycho.ws>
CC: Tyler Hicks <tyhi...@canonical.com>
Cc: Jann Horn <ja...@google.com>
Cc: sta...@vger.kernel.org
Cc: linux-kselft...@vger.kernel.org
Cc: net...@vger.kernel.org
Cc: b...@vger.kernel.org
---
 tools/testing/selftests/seccomp/seccomp_bpf.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c 
b/tools/testing/selftests/seccomp/seccomp_bpf.c
index ee52eab01800..921f0e26f835 100644
--- a/tools/testing/selftests/seccomp/seccomp_bpf.c
+++ b/tools/testing/selftests/seccomp/seccomp_bpf.c
@@ -35,6 +35,7 @@
 #include <stdbool.h>
 #include <string.h>
 #include <time.h>
+#include <limits.h>
 #include <linux/elf.h>
 #include <sys/uio.h>
 #include <sys/utsname.h>
@@ -3080,7 +3081,7 @@ static int user_trap_syscall(int nr, unsigned int flags)
        return seccomp(SECCOMP_SET_MODE_FILTER, flags, &prog);
 }
 
-#define USER_NOTIF_MAGIC 116983961184613L
+#define USER_NOTIF_MAGIC INT_MAX
 TEST(user_notification_basic)
 {
        pid_t pid;
-- 
2.23.0