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Overview
| Comment: | Fix the isLikeOrGlob() routine in the WHERE clause processing logic so that it avoids signed/unsigned character comparisons, as that can lead to an incorrect answer if the ESCAPE clause is an invalid UTF8 string. Problem found by OSSFuzz. |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
4195a3f8b5d2c2ec63771890c5aa7b5e |
| User & Date: | drh 2018-08-09 21:45:45 |
Context
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2018-08-13
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| 11:32 | Fix an incorrect comment on the unix-nolock VFS object. No functional code changes. check-in: 90f7c193b4 user: drh tags: trunk | |
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2018-08-10
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| 15:27 | Merge latest trunk changes with this branch. check-in: c355a83707 user: dan tags: alter-table-rename-column | |
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2018-08-09
| ||
| 21:45 | Fix the isLikeOrGlob() routine in the WHERE clause processing logic so that it avoids signed/unsigned character comparisons, as that can lead to an incorrect answer if the ESCAPE clause is an invalid UTF8 string. Problem found by OSSFuzz. check-in: 4195a3f8b5 user: drh tags: trunk | |
| 18:36 | When a column must be a constant due to WHERE clause and the value of that column is being coded as a constant, make sure the affinity is correct. check-in: 7404ea8316 user: drh tags: trunk | |
Changes
Changes to src/whereexpr.c.
190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 |
static int isLikeOrGlob(
Parse *pParse, /* Parsing and code generating context */
Expr *pExpr, /* Test this expression */
Expr **ppPrefix, /* Pointer to TK_STRING expression with pattern prefix */
int *pisComplete, /* True if the only wildcard is % in the last character */
int *pnoCase /* True if uppercase is equivalent to lowercase */
){
const u8 *z = 0; /* String on RHS of LIKE operator */
Expr *pRight, *pLeft; /* Right and left size of LIKE operator */
ExprList *pList; /* List of operands to the LIKE operator */
int c; /* One character in z[] */
int cnt; /* Number of non-wildcard prefix characters */
char wc[4]; /* Wildcard characters */
sqlite3 *db = pParse->db; /* Database connection */
sqlite3_value *pVal = 0;
int op; /* Opcode of pRight */
int rc; /* Result code to return */
if( !sqlite3IsLikeFunction(db, pExpr, pnoCase, wc) ){
return 0;
}
#ifdef SQLITE_EBCDIC
if( *pnoCase ) return 0;
#endif
pList = pExpr->x.pList;
pLeft = pList->a[1].pExpr;
|
| | | | |
190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 |
static int isLikeOrGlob(
Parse *pParse, /* Parsing and code generating context */
Expr *pExpr, /* Test this expression */
Expr **ppPrefix, /* Pointer to TK_STRING expression with pattern prefix */
int *pisComplete, /* True if the only wildcard is % in the last character */
int *pnoCase /* True if uppercase is equivalent to lowercase */
){
const u8 *z = 0; /* String on RHS of LIKE operator */
Expr *pRight, *pLeft; /* Right and left size of LIKE operator */
ExprList *pList; /* List of operands to the LIKE operator */
u8 c; /* One character in z[] */
int cnt; /* Number of non-wildcard prefix characters */
u8 wc[4]; /* Wildcard characters */
sqlite3 *db = pParse->db; /* Database connection */
sqlite3_value *pVal = 0;
int op; /* Opcode of pRight */
int rc; /* Result code to return */
if( !sqlite3IsLikeFunction(db, pExpr, pnoCase, (char*)wc) ){
return 0;
}
#ifdef SQLITE_EBCDIC
if( *pnoCase ) return 0;
#endif
pList = pExpr->x.pList;
pLeft = pList->a[1].pExpr;
|
Changes to test/fuzzdata5.db.
cannot compute difference between binary files