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Overview
| Comment: | Slight adjustment to the printf formatter large memory allocation detector so that it does not overestimate the amount of space needed for oversize %d conversions. |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
1aee70d6de8a9b17ebb74a7cb1dad651 |
| User & Date: | drh 2019-02-01 21:08:27 |
Context
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2019-02-02
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| 01:27 | Fix harmless compiler warning. check-in: dddda685 user: mistachkin tags: trunk | |
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2019-02-01
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| 21:08 | Slight adjustment to the printf formatter large memory allocation detector so that it does not overestimate the amount of space needed for oversize %d conversions. check-in: 1aee70d6 user: drh tags: trunk | |
| 20:29 | Prevent the printf formatter from doing large memory allocations - larger than either the size of the static buffer for interfaces like sqlite3_snprintf(), or larger than SQLITE_LIMIT_LENGTH for interfaces that are associated with a database connection. This helps to prevent DOS attacks on products that let hostile sources inject arbitrary SQL. It also helps fuzzers run faster and more effectively. check-in: 179e5d46 user: drh tags: trunk | |
Changes
Changes to src/printf.c.
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if( flag_zeropad && precision<width-(prefix!=0) ){
precision = width-(prefix!=0);
}
if( precision<etBUFSIZE-10-etBUFSIZE/3 ){
nOut = etBUFSIZE;
zOut = buf;
}else{
u64 n = (u64)precision + 10 + precision/3;
zOut = zExtra = printfTempBuf(pAccum, n);
if( zOut==0 ) return;
nOut = (int)n;
}
bufpt = &zOut[nOut-1];
if( xtype==etORDINAL ){
static const char zOrd[] = "thstndrd";
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> | > |
438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 |
if( flag_zeropad && precision<width-(prefix!=0) ){
precision = width-(prefix!=0);
}
if( precision<etBUFSIZE-10-etBUFSIZE/3 ){
nOut = etBUFSIZE;
zOut = buf;
}else{
u64 n;
n = (u64)precision + 10;
if( cThousand ) n += precision/3;
zOut = zExtra = printfTempBuf(pAccum, n);
if( zOut==0 ) return;
nOut = (int)n;
}
bufpt = &zOut[nOut-1];
if( xtype==etORDINAL ){
static const char zOrd[] = "thstndrd";
|