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Overview
| Comment: | Avoid passing NULL pointers to memcmp() or memcpy(), even when the "number-of-bytes" argument is passed 0. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
56ff72ab44288296efc99a608f7edc43 |
| User & Date: | dan 2016-12-30 14:15:56 |
Context
|
2016-12-30
| ||
| 14:25 | Add a test to ensure that the app-defined pcache xFetch() method is never passed a key of zero. check-in: 0bdbe49c user: drh tags: trunk | |
| 14:15 | Avoid passing NULL pointers to memcmp() or memcpy(), even when the "number-of-bytes" argument is passed 0. check-in: 56ff72ab user: dan tags: trunk | |
| 12:10 | Fix a harmless compiler warning in fuzzcheck.c check-in: 2842bc60 user: drh tags: trunk | |
Changes
Changes to ext/session/sqlite3session.c.
370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 .... 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 .... 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 |
}
n = sqlite3_value_bytes(pValue);
if( z==0 && (eType!=SQLITE_BLOB || n>0) ) return SQLITE_NOMEM;
nVarint = sessionVarintLen(n);
if( aBuf ){
sessionVarintPut(&aBuf[1], n);
memcpy(&aBuf[nVarint + 1], eType==SQLITE_TEXT ?
sqlite3_value_text(pValue) : sqlite3_value_blob(pValue), n
);
}
nByte = 1 + nVarint + n;
break;
}
}
}else{
................................................................................
*/
static void sessionAppendBlob(
SessionBuffer *p,
const u8 *aBlob,
int nBlob,
int *pRc
){
if( 0==sessionBufferGrow(p, nBlob, pRc) ){
memcpy(&p->aBuf[p->nBuf], aBlob, nBlob);
p->nBuf += nBlob;
}
}
/*
** This function is a no-op if *pRc is other than SQLITE_OK when it is
................................................................................
}
}
bChanged = 1;
break;
}
default: {
int nByte;
int nHdr = 1 + sessionVarintGet(&pCsr[1], &nByte);
assert( eType==SQLITE_TEXT || eType==SQLITE_BLOB );
nAdvance = nHdr + nByte;
if( eType==sqlite3_column_type(pStmt, i)
&& nByte==sqlite3_column_bytes(pStmt, i)
&& 0==memcmp(&pCsr[nHdr], sqlite3_column_blob(pStmt, i), nByte)
){
break;
}
bChanged = 1;
}
}
|
| < < | | | | | | |
370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 .... 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 .... 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 |
}
n = sqlite3_value_bytes(pValue);
if( z==0 && (eType!=SQLITE_BLOB || n>0) ) return SQLITE_NOMEM;
nVarint = sessionVarintLen(n);
if( aBuf ){
sessionVarintPut(&aBuf[1], n);
if( n ) memcpy(&aBuf[nVarint + 1], z, n);
}
nByte = 1 + nVarint + n;
break;
}
}
}else{
................................................................................
*/
static void sessionAppendBlob(
SessionBuffer *p,
const u8 *aBlob,
int nBlob,
int *pRc
){
if( nBlob>0 && 0==sessionBufferGrow(p, nBlob, pRc) ){
memcpy(&p->aBuf[p->nBuf], aBlob, nBlob);
p->nBuf += nBlob;
}
}
/*
** This function is a no-op if *pRc is other than SQLITE_OK when it is
................................................................................
}
}
bChanged = 1;
break;
}
default: {
int n;
int nHdr = 1 + sessionVarintGet(&pCsr[1], &n);
assert( eType==SQLITE_TEXT || eType==SQLITE_BLOB );
nAdvance = nHdr + n;
if( eType==sqlite3_column_type(pStmt, i)
&& n==sqlite3_column_bytes(pStmt, i)
&& (n==0 || 0==memcmp(&pCsr[nHdr], sqlite3_column_blob(pStmt, i), n))
){
break;
}
bChanged = 1;
}
}
|
Changes to src/analyze.c.
1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 |
** a buffer overread. */
pSample->n = sqlite3_column_bytes(pStmt, 4);
pSample->p = sqlite3DbMallocZero(db, pSample->n + 2);
if( pSample->p==0 ){
sqlite3_finalize(pStmt);
return SQLITE_NOMEM_BKPT;
}
memcpy(pSample->p, sqlite3_column_blob(pStmt, 4), pSample->n);
pIdx->nSample++;
}
rc = sqlite3_finalize(pStmt);
if( rc==SQLITE_OK ) initAvgEq(pPrevIdx);
return rc;
}
|
> | > |
1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 |
** a buffer overread. */
pSample->n = sqlite3_column_bytes(pStmt, 4);
pSample->p = sqlite3DbMallocZero(db, pSample->n + 2);
if( pSample->p==0 ){
sqlite3_finalize(pStmt);
return SQLITE_NOMEM_BKPT;
}
if( pSample->n ){
memcpy(pSample->p, sqlite3_column_blob(pStmt, 4), pSample->n);
}
pIdx->nSample++;
}
rc = sqlite3_finalize(pStmt);
if( rc==SQLITE_OK ) initAvgEq(pPrevIdx);
return rc;
}
|
Changes to src/func.c.
196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 |
UNUSED_PARAMETER(argc);
typeHaystack = sqlite3_value_type(argv[0]);
typeNeedle = sqlite3_value_type(argv[1]);
if( typeHaystack==SQLITE_NULL || typeNeedle==SQLITE_NULL ) return;
nHaystack = sqlite3_value_bytes(argv[0]);
nNeedle = sqlite3_value_bytes(argv[1]);
if( typeHaystack==SQLITE_BLOB && typeNeedle==SQLITE_BLOB ){
zHaystack = sqlite3_value_blob(argv[0]);
zNeedle = sqlite3_value_blob(argv[1]);
isText = 0;
}else{
zHaystack = sqlite3_value_text(argv[0]);
zNeedle = sqlite3_value_text(argv[1]);
isText = 1;
if( zNeedle==0 ) return;
assert( zHaystack );
}
while( nNeedle<=nHaystack && memcmp(zHaystack, zNeedle, nNeedle)!=0 ){
N++;
do{
nHaystack--;
zHaystack++;
}while( isText && (zHaystack[0]&0xc0)==0x80 );
}
if( nNeedle>nHaystack ) N = 0;
sqlite3_result_int(context, N);
}
/*
** Implementation of the printf() function.
*/
static void printfFunc(
|
> | | | | | | | | | | | | | | | | | | | > |
196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 |
UNUSED_PARAMETER(argc); typeHaystack = sqlite3_value_type(argv[0]); typeNeedle = sqlite3_value_type(argv[1]); if( typeHaystack==SQLITE_NULL || typeNeedle==SQLITE_NULL ) return; nHaystack = sqlite3_value_bytes(argv[0]); nNeedle = sqlite3_value_bytes(argv[1]); if( nNeedle>0 ){ if( typeHaystack==SQLITE_BLOB && typeNeedle==SQLITE_BLOB ){ zHaystack = sqlite3_value_blob(argv[0]); zNeedle = sqlite3_value_blob(argv[1]); isText = 0; }else{ zHaystack = sqlite3_value_text(argv[0]); zNeedle = sqlite3_value_text(argv[1]); isText = 1; if( zNeedle==0 ) return; assert( zHaystack ); } while( nNeedle<=nHaystack && memcmp(zHaystack, zNeedle, nNeedle)!=0 ){ N++; do{ nHaystack--; zHaystack++; }while( isText && (zHaystack[0]&0xc0)==0x80 ); } if( nNeedle>nHaystack ) N = 0; } sqlite3_result_int(context, N); } /* ** Implementation of the printf() function. */ static void printfFunc( |
Changes to src/main.c.
2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 |
zOpt = &zVal[nVal+1];
}
}else{
zFile = sqlite3_malloc64(nUri+2);
if( !zFile ) return SQLITE_NOMEM_BKPT;
memcpy(zFile, zUri, nUri);
zFile[nUri] = '\0';
zFile[nUri+1] = '\0';
flags &= ~SQLITE_OPEN_URI;
}
*ppVfs = sqlite3_vfs_find(zVfs);
if( *ppVfs==0 ){
|
> | > |
2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 |
zOpt = &zVal[nVal+1];
}
}else{
zFile = sqlite3_malloc64(nUri+2);
if( !zFile ) return SQLITE_NOMEM_BKPT;
if( nUri ){
memcpy(zFile, zUri, nUri);
}
zFile[nUri] = '\0';
zFile[nUri+1] = '\0';
flags &= ~SQLITE_OPEN_URI;
}
*ppVfs = sqlite3_vfs_find(zVfs);
if( *ppVfs==0 ){
|
Changes to src/printf.c.
837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 |
void sqlite3StrAccumAppend(StrAccum *p, const char *z, int N){
assert( z!=0 || N==0 );
assert( p->zText!=0 || p->nChar==0 || p->accError );
assert( N>=0 );
assert( p->accError==0 || p->nAlloc==0 );
if( p->nChar+N >= p->nAlloc ){
enlargeAndAppend(p,z,N);
}else{
assert( p->zText );
p->nChar += N;
memcpy(&p->zText[p->nChar-N], z, N);
}
}
/*
|
| |
837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 |
void sqlite3StrAccumAppend(StrAccum *p, const char *z, int N){
assert( z!=0 || N==0 );
assert( p->zText!=0 || p->nChar==0 || p->accError );
assert( N>=0 );
assert( p->accError==0 || p->nAlloc==0 );
if( p->nChar+N >= p->nAlloc ){
enlargeAndAppend(p,z,N);
}else if( N ){
assert( p->zText );
p->nChar += N;
memcpy(&p->zText[p->nChar-N], z, N);
}
}
/*
|