From: Rob Landley <rob@landley.net>
Date: Wed, 28 Jun 2006 13:50:59 +0000 (-0000)
Subject: Fix http://bugs.busybox.net/view.php?id=826 in which "(echo; echo) | sed x"
X-Git-Tag: 1_2_0~70
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=ea7c18514b6c9304b969cd977390aa09f5095f8d;p=oweals%2Fbusybox.git

Fix bugs.busybox.net/view.php?id=826 in which "(echo; echo) | sed x"
crashes because the empty state of the hold space is NULL but the empty
state of the pattern space is "".
---

diff --git a/editors/sed.c b/editors/sed.c
index 219a44008..ed584e5df 100644
--- a/editors/sed.c
+++ b/editors/sed.c
@@ -1054,7 +1054,7 @@ restart:
 					case 'x': /* Exchange hold and pattern space */
 					{
 						char *tmp = pattern_space;
-						pattern_space = bbg.hold_space;
+						pattern_space = bbg.hold_space ? : xzalloc(1);
 						no_newline=0;
 						bbg.hold_space = tmp;
 						break;