[commit] r1800 - trunk

[repository service]

Author: stefanct
Date: Tue May 27 02:06:14 2014
New Revision: 1800
URL: http://flashrom.org/trac/flashrom/changeset/1800

Log:
Fix various tiny problems in verify_range().

First of all, fix CID1130010: Resource leak as reported by Stefan Reinauer.
Alternatively to Stefan's approach, just move the malloc() out of the scope.

Additionally, get rid of an unnecessary exit(1) and correctly return -1 in all
error cases as documented.

Signed-off-by: Stefan Tauner 
Acked-by: Stefan Tauner

Modified:
   trunk/flashrom.c

Modified: trunk/flashrom.c
==============================================================================
--- trunk/flashrom.c	Tue May 27 00:05:31 2014	(r1799)
+++ trunk/flashrom.c	Tue May 27 02:06:14 2014	(r1800)
@@ -672,20 +672,20 @@
  */
 int verify_range(struct flashctx *flash, const uint8_t *cmpbuf, unsigned int start, unsigned int len)
 {
-	uint8_t *readbuf = malloc(len);
-	int ret = 0;
-
    if (!len)
-		goto out_free;
+		return -1;

if (!flash->chip->read) {
    	msg_cerr("ERROR: flashrom has no read function for this flash chip.\n");
-		return 1;
+		return -1;
    }
+
+	uint8_t *readbuf = malloc(len);
    if (!readbuf) {
    	msg_gerr("Could not allocate memory!\n");
-		exit(1);
+		return -1;
    }
+	int ret = 0;

if (start + len > flash->chip->total_size * 1024) {
    	msg_gerr("Error: %s called with start 0x%x + len 0x%x >"
@@ -699,7 +699,8 @@
    if (ret) {
    	msg_gerr("Verification impossible because read failed "
    		 "at 0x%x (len 0x%x)\n", start, len);
-		return ret;
+		ret = -1;
+		goto out_free;
    }

ret = compare_range(cmpbuf, readbuf, start, len);