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Fix a bug in sqlite3_realloc() - if called with a size of more than

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2147483392 it returns 0 but it also releases the prior allocation. (CVS 6827)

FossilOrigin-Name: 653df0afcc58de82c8c1b5f6a7b2f4829ff69792
This commit is contained in:
drh
2009-06-27 00:48:33 +00:00
parent e08ed7e71b
commit b6063cf823
3 changed files with 13 additions and 10 deletions
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9
src/malloc.c
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@@ -12,7 +12,7 @@
**
** Memory allocation functions used throughout sqlite.
**
** $Id: malloc.c,v 1.63 2009/06/26 18:35:17 drh Exp $
** $Id: malloc.c,v 1.64 2009/06/27 00:48:33 drh Exp $
*/
#include "sqliteInt.h"
#include <stdarg.h>
@@ -473,11 +473,14 @@ void *sqlite3Realloc(void *pOld, int nBytes){
if( pOld==0 ){
return sqlite3Malloc(nBytes);
}
if( nBytes<=0 || nBytes>=0x7fffff00 ){
/* The 0x7ffff00 limit term is explained in comments on sqlite3Malloc() */
if( nBytes<=0 ){
sqlite3_free(pOld);
return 0;
}
if( nBytes>=0x7fffff00 ){
/* The 0x7ffff00 limit term is explained in comments on sqlite3Malloc() */
return 0;
}
nOld = sqlite3MallocSize(pOld);
if( sqlite3GlobalConfig.bMemstat ){
sqlite3_mutex_enter(mem0.mutex);