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modules: limit the max amount of items in the protocol

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For now, put a limit on the amount of items we can send and receive
over the native protocol. A more complex way of allocating and freeing
can be implemented later when we really need to raise the limits.

Fixes #2070
This commit is contained in:
Wim Taymans 2022-01-28 15:55:44 +01:00
parent 92198e4d0d
commit ead827d6cb
6 changed files with 70 additions and 2 deletions
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7
src/modules/module-client-device/protocol-native.c
View file

@ -32,6 +32,9 @@
#include <pipewire/extensions/protocol-native.h>
#define MAX_DICT 256
#define MAX_PARAM_INFO 128
static inline void push_item(struct spa_pod_builder *b, const struct spa_dict_item *item)
{
const char *str;
@ -62,6 +65,8 @@ do { \
SPA_POD_Int(&(d)->n_items), NULL) < 0) \
return -EINVAL; \
if ((d)->n_items > 0) { \
if ((d)->n_items > MAX_DICT) \
return -ENOSPC; \
(d)->items = alloca((d)->n_items * sizeof(struct spa_dict_item)); \
for (i = 0; i < (d)->n_items; i++) { \
if (parse_item(prs, (struct spa_dict_item *) &(d)->items[i]) < 0) \
@ -77,6 +82,8 @@ do { \
SPA_POD_Int(&(n_params)), NULL) < 0) \
return -EINVAL; \
if (n_params > 0) { \
if (n_params > MAX_PARAM_INFO) \
return -ENOSPC; \
params = alloca(n_params * sizeof(struct spa_param_info)); \
for (i = 0; i < n_params; i++) { \
if (spa_pod_parser_get(prs, \