From 85720291bc64f18f83a505a9bc0d82911e790328 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Sat, 27 Feb 1993 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1993-02-27

---
 port/sysproc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/port/sysproc.c b/port/sysproc.c
index 33bec8f7dc403e692c2a0fd55d41b29b1f27a6e5..f3e7413399576a9f4c5a4f9c4bf5a7e6748ec18c 100644
--- a/port/sysproc.c
+++ b/port/sysproc.c
@@ -301,7 +301,7 @@ sysexec(ulong *arg)
 		if(((ulong)argp&(BY2PG-1)) < BY2WD)
 			validaddr((ulong)argp, BY2WD, 0);
 		validaddr((ulong)a, 1, 0);
-		nbytes += (vmemchr(a, 0, 0xFFFFFFFF) - a) + 1;
+		nbytes += (vmemchr(a, 0, 0x7FFFFFFF) - a) + 1;
 		nargs++;
 	}
 	ssize = BY2WD*(nargs+1) + ((nbytes+(BY2WD-1)) & ~(BY2WD-1));