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From: "Pedro F. Giffuni" <pfg@FreeBSD.org>
Date: Fri, 18 Dec 2015 21:58:43 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-head@freebsd.org
Subject: svn commit: r292454 - head/bin/ed
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Author: pfg
Date: Fri Dec 18 21:58:42 2015
New Revision: 292454
URL: https://svnweb.freebsd.org/changeset/base/292454

Log:
  ed(1): Prevent possible string overflows
  
  CID:		1007252
  MFC after:	2 weeks

Modified:
  head/bin/ed/main.c

Modified: head/bin/ed/main.c
==============================================================================
--- head/bin/ed/main.c	Fri Dec 18 21:34:28 2015	(r292453)
+++ head/bin/ed/main.c	Fri Dec 18 21:58:42 2015	(r292454)
@@ -505,7 +505,8 @@ exec_command(void)
 			return ERR;
 		else if (open_sbuf() < 0)
 			return FATAL;
-		if (*fnp && *fnp != '!') strcpy(old_filename, fnp);
+		if (*fnp && *fnp != '!')
+			 strncpy(old_filename, fnp, PATH_MAX);
 #ifdef BACKWARDS
 		if (*fnp == '\0' && *old_filename == '\0') {
 			errmsg = "no current filename";
@@ -532,7 +533,8 @@ exec_command(void)
 			return ERR;
 		}
 		GET_COMMAND_SUFFIX();
-		if (*fnp) strcpy(old_filename, fnp);
+		if (*fnp)
+			strncpy(old_filename, fnp, PATH_MAX);
 		printf("%s\n", strip_escapes(old_filename));
 		break;
 	case 'g':
@@ -663,7 +665,7 @@ exec_command(void)
 		GET_COMMAND_SUFFIX();
 		if (!isglobal) clear_undo_stack();
 		if (*old_filename == '\0' && *fnp != '!')
-			strcpy(old_filename, fnp);
+			strncpy(old_filename, fnp, PATH_MAX);
 #ifdef BACKWARDS
 		if (*fnp == '\0' && *old_filename == '\0') {
 			errmsg = "no current filename";
@@ -797,7 +799,7 @@ exec_command(void)
 			return ERR;
 		GET_COMMAND_SUFFIX();
 		if (*old_filename == '\0' && *fnp != '!')
-			strcpy(old_filename, fnp);
+			strncpy(old_filename, fnp, PATH_MAX);
 #ifdef BACKWARDS
 		if (*fnp == '\0' && *old_filename == '\0') {
 			errmsg = "no current filename";