* [PATCH nft] expression: define .clone for catchall set element
@ 2023-06-30 8:01 Pablo Neira Ayuso
0 siblings, 0 replies; 2+ messages in thread
From: Pablo Neira Ayuso @ 2023-06-30 8:01 UTC (permalink / raw
To: netfilter-devel
Otherwise reuse of catchall set element expression in variable triggers
a null-pointer dereference.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
src/expression.c | 15 +++++++++++--
.../shell/testcases/maps/0017_map_variable_0 | 21 +++++++++++++++++++
2 files changed, 34 insertions(+), 2 deletions(-)
create mode 100755 tests/shell/testcases/maps/0017_map_variable_0
diff --git a/src/expression.c b/src/expression.c
index 9b53f43b5267..34902c842d16 100644
--- a/src/expression.c
+++ b/src/expression.c
@@ -1342,9 +1342,8 @@ static void set_elem_expr_destroy(struct expr *expr)
stmt_free(stmt);
}
-static void set_elem_expr_clone(struct expr *new, const struct expr *expr)
+static void __set_elem_expr_clone(struct expr *new, const struct expr *expr)
{
- new->key = expr_clone(expr->key);
new->expiration = expr->expiration;
new->timeout = expr->timeout;
if (expr->comment)
@@ -1352,6 +1351,12 @@ static void set_elem_expr_clone(struct expr *new, const struct expr *expr)
init_list_head(&new->stmt_list);
}
+static void set_elem_expr_clone(struct expr *new, const struct expr *expr)
+{
+ new->key = expr_clone(expr->key);
+ __set_elem_expr_clone(new, expr);
+}
+
static const struct expr_ops set_elem_expr_ops = {
.type = EXPR_SET_ELEM,
.name = "set element",
@@ -1379,11 +1384,17 @@ static void set_elem_catchall_expr_print(const struct expr *expr,
nft_print(octx, "*");
}
+static void set_elem_catchall_expr_clone(struct expr *new, const struct expr *expr)
+{
+ __set_elem_expr_clone(new, expr);
+}
+
static const struct expr_ops set_elem_catchall_expr_ops = {
.type = EXPR_SET_ELEM_CATCHALL,
.name = "catch-all set element",
.print = set_elem_catchall_expr_print,
.json = set_elem_catchall_expr_json,
+ .clone = set_elem_catchall_expr_clone,
};
struct expr *set_elem_catchall_expr_alloc(const struct location *loc)
diff --git a/tests/shell/testcases/maps/0017_map_variable_0 b/tests/shell/testcases/maps/0017_map_variable_0
new file mode 100755
index 000000000000..70cea88de238
--- /dev/null
+++ b/tests/shell/testcases/maps/0017_map_variable_0
@@ -0,0 +1,21 @@
+#!/bin/bash
+
+set -e
+
+RULESET="define x = {
+ 1.1.1.1 : 2,
+ * : 3,
+}
+
+table ip x {
+ map y {
+ typeof ip saddr : mark
+ elements = \$x
+ }
+ map z {
+ typeof ip saddr : mark
+ elements = \$x
+ }
+}"
+
+$NFT -f - <<< "$RULESET"
--
2.30.2
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [PATCH nft] expression: define .clone for catchall set element
@ 2023-07-04 8:33 Pablo Neira Ayuso
0 siblings, 0 replies; 2+ messages in thread
From: Pablo Neira Ayuso @ 2023-07-04 8:33 UTC (permalink / raw
To: netfilter-devel
Otherwise reuse of catchall set element expression in variable triggers
a null-pointer dereference.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
src/expression.c | 15 +++++++++++--
.../shell/testcases/maps/0017_map_variable_0 | 21 +++++++++++++++++++
2 files changed, 34 insertions(+), 2 deletions(-)
create mode 100755 tests/shell/testcases/maps/0017_map_variable_0
diff --git a/src/expression.c b/src/expression.c
index 9b53f43b5267..34902c842d16 100644
--- a/src/expression.c
+++ b/src/expression.c
@@ -1342,9 +1342,8 @@ static void set_elem_expr_destroy(struct expr *expr)
stmt_free(stmt);
}
-static void set_elem_expr_clone(struct expr *new, const struct expr *expr)
+static void __set_elem_expr_clone(struct expr *new, const struct expr *expr)
{
- new->key = expr_clone(expr->key);
new->expiration = expr->expiration;
new->timeout = expr->timeout;
if (expr->comment)
@@ -1352,6 +1351,12 @@ static void set_elem_expr_clone(struct expr *new, const struct expr *expr)
init_list_head(&new->stmt_list);
}
+static void set_elem_expr_clone(struct expr *new, const struct expr *expr)
+{
+ new->key = expr_clone(expr->key);
+ __set_elem_expr_clone(new, expr);
+}
+
static const struct expr_ops set_elem_expr_ops = {
.type = EXPR_SET_ELEM,
.name = "set element",
@@ -1379,11 +1384,17 @@ static void set_elem_catchall_expr_print(const struct expr *expr,
nft_print(octx, "*");
}
+static void set_elem_catchall_expr_clone(struct expr *new, const struct expr *expr)
+{
+ __set_elem_expr_clone(new, expr);
+}
+
static const struct expr_ops set_elem_catchall_expr_ops = {
.type = EXPR_SET_ELEM_CATCHALL,
.name = "catch-all set element",
.print = set_elem_catchall_expr_print,
.json = set_elem_catchall_expr_json,
+ .clone = set_elem_catchall_expr_clone,
};
struct expr *set_elem_catchall_expr_alloc(const struct location *loc)
diff --git a/tests/shell/testcases/maps/0017_map_variable_0 b/tests/shell/testcases/maps/0017_map_variable_0
new file mode 100755
index 000000000000..70cea88de238
--- /dev/null
+++ b/tests/shell/testcases/maps/0017_map_variable_0
@@ -0,0 +1,21 @@
+#!/bin/bash
+
+set -e
+
+RULESET="define x = {
+ 1.1.1.1 : 2,
+ * : 3,
+}
+
+table ip x {
+ map y {
+ typeof ip saddr : mark
+ elements = \$x
+ }
+ map z {
+ typeof ip saddr : mark
+ elements = \$x
+ }
+}"
+
+$NFT -f - <<< "$RULESET"
--
2.30.2
^ permalink raw reply related [flat|nested] 2+ messages in thread
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