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Overview
| Comment: | Fix an OOB read in the INSTR() function introduced yesterday by check-in [3fb40f518086c1e8] and detected by OSSFuzz. The test case is in TH3. |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
d49047c1b59bbfd05204af9973cdb0fa |
| User & Date: | drh 2019-09-18 11:16:46 |
Context
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2019-09-18
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| 11:46 | Fix a "jump depends on unititialized value" valgrind error in fts5 triggered by corrupt database records. check-in: 6b6751cd90 user: dan tags: trunk | |
| 11:16 | Fix an OOB read in the INSTR() function introduced yesterday by check-in [3fb40f518086c1e8] and detected by OSSFuzz. The test case is in TH3. check-in: d49047c1b5 user: drh tags: trunk | |
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2019-09-17
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| 21:28 | Do not change the OP_String8 opcode into OP_String until *after* any necessary encoding conversions are accomplished. Otherwise, a rerun of the prepared statement after an OOM can result in errors. Test case in TH3. check-in: 8efd62594e user: drh tags: trunk | |
Changes
Changes to src/func.c.
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}else if( typeHaystack!=SQLITE_BLOB && typeNeedle!=SQLITE_BLOB ){
zHaystack = sqlite3_value_text(argv[0]);
zNeedle = sqlite3_value_text(argv[1]);
isText = 1;
}else{
pC1 = sqlite3_value_dup(argv[0]);
zHaystack = sqlite3_value_text(pC1);
pC2 = sqlite3_value_dup(argv[1]);
zNeedle = sqlite3_value_text(pC2);
isText = 1;
}
if( zNeedle==0 || (nHaystack && zHaystack==0) ){
sqlite3_result_error_nomem(context);
goto endInstr;
}
firstChar = zNeedle[0];
while( nNeedle<=nHaystack
&& (zHaystack[0]!=firstChar || memcmp(zHaystack, zNeedle, nNeedle)!=0)
){
N++;
do{
nHaystack--;
................................................................................
}
if( nNeedle>nHaystack ) N = 0;
}
sqlite3_result_int(context, N);
endInstr:
sqlite3_value_free(pC1);
sqlite3_value_free(pC2);
}
/*
** Implementation of the printf() function.
*/
static void printfFunc(
sqlite3_context *context,
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}else if( typeHaystack!=SQLITE_BLOB && typeNeedle!=SQLITE_BLOB ){
zHaystack = sqlite3_value_text(argv[0]);
zNeedle = sqlite3_value_text(argv[1]);
isText = 1;
}else{
pC1 = sqlite3_value_dup(argv[0]);
zHaystack = sqlite3_value_text(pC1);
if( zHaystack==0 ) goto endInstrOOM;
nHaystack = sqlite3_value_bytes(pC1);
pC2 = sqlite3_value_dup(argv[1]);
zNeedle = sqlite3_value_text(pC2);
if( zNeedle==0 ) goto endInstrOOM;
nNeedle = sqlite3_value_bytes(pC2);
isText = 1;
}
if( zNeedle==0 || (nHaystack && zHaystack==0) ) goto endInstrOOM;
firstChar = zNeedle[0];
while( nNeedle<=nHaystack
&& (zHaystack[0]!=firstChar || memcmp(zHaystack, zNeedle, nNeedle)!=0)
){
N++;
do{
nHaystack--;
................................................................................
}
if( nNeedle>nHaystack ) N = 0;
}
sqlite3_result_int(context, N);
endInstr:
sqlite3_value_free(pC1);
sqlite3_value_free(pC2);
return;
endInstrOOM:
sqlite3_result_error_nomem(context);
goto endInstr;
}
/*
** Implementation of the printf() function.
*/
static void printfFunc(
sqlite3_context *context,
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