From 726d181ab4faddce7260568f067102fa448ee6ab Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Sat, 19 Sep 1998 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1998-09-19

---
 port/segment.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/port/segment.c b/port/segment.c
index 128bb9f595b1ba5d199abbde9dadeb5c2a91674f..fd3d1b4ed53bb14d47d7309b678cf4741db7a992 100644
--- a/port/segment.c
+++ b/port/segment.c
@@ -62,6 +62,9 @@ newseg(int type, ulong base, ulong size)
 
 	mapsize = ROUND(size, PTEPERTAB)/PTEPERTAB;
 	if(mapsize > nelem(s->ssegmap)){
+		mapsize *= 2;
+		if(mapsize > (SEGMAPSIZE*PTEPERTAB))
+			mapsize = (SEGMAPSIZE*PTEPERTAB);
 		s->map = smalloc(mapsize*sizeof(Pte*));
 		s->mapsize = mapsize;
 	}
@@ -436,7 +439,7 @@ ibrk(ulong addr, int seg)
 	mapsize = ROUND(newsize, PTEPERTAB)/PTEPERTAB;
 	if(mapsize > s->mapsize){
 		map = smalloc(mapsize*sizeof(Pte*));
-		memmove(map, s->map, s->mapsize);
+		memmove(map, s->map, s->mapsize*sizeof(Pte*));
 		if(s->map != s->ssegmap)
 			free(s->map);
 		s->map = map;