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master aaf6b6b: Ensure that argument to 'verify' is a constant expressio


From: Philipp Stephani
Subject: master aaf6b6b: Ensure that argument to 'verify' is a constant expression.
Date: Thu, 22 Apr 2021 10:16:46 -0400 (EDT)

branch: master
commit aaf6b6bf80805d18180e1c16350e9473716f5915
Author: Philipp Stephani <phst@google.com>
Commit: Philipp Stephani <phst@google.com>

    Ensure that argument to 'verify' is a constant expression.
    
    Casting NULL is not a constant expression (Bug#47951).
    
    * lib-src/seccomp-filter.c (main): Turn check for null pointer
    representation into a runtime assertion.
---
 lib-src/seccomp-filter.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib-src/seccomp-filter.c b/lib-src/seccomp-filter.c
index 31d0809..dc568e0 100644
--- a/lib-src/seccomp-filter.c
+++ b/lib-src/seccomp-filter.c
@@ -35,6 +35,7 @@ variants of those files that can be used to sandbox Emacs 
before
 
 #include "config.h"
 
+#include <assert.h>
 #include <errno.h>
 #include <limits.h>
 #include <stdarg.h>
@@ -169,7 +170,7 @@ main (int argc, char **argv)
   verify (sizeof (long) == 8 && LONG_MIN == INT64_MIN
           && LONG_MAX == INT64_MAX);
   verify (sizeof (void *) == 8);
-  verify ((uintptr_t) NULL == 0);
+  assert ((uintptr_t) NULL == 0);
 
   /* Allow a clean exit.  */
   RULE (SCMP_ACT_ALLOW, SCMP_SYS (exit));



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