diff options
Diffstat (limited to 'src/evaluate.c')
| -rw-r--r-- | src/evaluate.c | 61 |
1 files changed, 60 insertions, 1 deletions
diff --git a/src/evaluate.c b/src/evaluate.c index 77bdb9cd..cc35f884 100644 --- a/src/evaluate.c +++ b/src/evaluate.c @@ -1640,10 +1640,18 @@ static int list_member_evaluate(struct eval_ctx *ctx, struct expr **expr) struct expr *next = list_entry((*expr)->list.next, struct expr, list); int err; + /* should never be hit in practice */ + if (ctx->recursion.list >= USHRT_MAX) + return expr_binary_error(ctx->msgs, next, NULL, + "List limit %u reached ", + ctx->recursion.list); + + ctx->recursion.list++; assert(*expr != next); list_del(&(*expr)->list); err = expr_evaluate(ctx, expr); list_add_tail(&(*expr)->list, &next->list); + ctx->recursion.list--; return err; } @@ -1706,10 +1714,61 @@ static int expr_evaluate_concat(struct eval_ctx *ctx, struct expr **expr) if (list_member_evaluate(ctx, &i) < 0) return -1; - if (i->etype == EXPR_SET) + switch (i->etype) { + case EXPR_INVALID: + case __EXPR_MAX: + BUG("Unexpected etype %d", i->etype); + break; + case EXPR_VALUE: + case EXPR_UNARY: + case EXPR_BINOP: + case EXPR_RELATIONAL: + case EXPR_CONCAT: + case EXPR_MAP: + case EXPR_PAYLOAD: + case EXPR_EXTHDR: + case EXPR_META: + case EXPR_RT: + case EXPR_CT: + case EXPR_SET_ELEM: + case EXPR_NUMGEN: + case EXPR_HASH: + case EXPR_FIB: + case EXPR_SOCKET: + case EXPR_OSF: + case EXPR_XFRM: + break; + case EXPR_RANGE: + case EXPR_PREFIX: + /* allowed on RHS (e.g. th dport . mark { 1-65535 . 42 } + * ~~~~~~~~ allowed + * but not on LHS (e.g 1-4 . mark { ...} + * ~~~ illegal + * + * recursion.list > 0 means that the concatenation is + * part of another expression, such as EXPR_MAPPING or + * EXPR_SET_ELEM (is used as RHS). + */ + if (ctx->recursion.list > 0) + break; + + return expr_error(ctx->msgs, i, + "cannot use %s in concatenation", + expr_name(i)); + case EXPR_VERDICT: + case EXPR_SYMBOL: + case EXPR_VARIABLE: + case EXPR_LIST: + case EXPR_SET: + case EXPR_SET_REF: + case EXPR_MAPPING: + case EXPR_SET_ELEM_CATCHALL: + case EXPR_RANGE_VALUE: + case EXPR_RANGE_SYMBOL: return expr_error(ctx->msgs, i, "cannot use %s in concatenation", expr_name(i)); + } if (!i->dtype) return expr_error(ctx->msgs, i, |