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Walking these callback lists that might unregister callbacks is a use after free hazard. Hmm.

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git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@3709 ed5197a5-7fde-0310-b194-c3ffbd925b24
This commit is contained in:
Cory McWilliams 2021-12-27 22:28:27 +00:00
parent 9f0315458f
commit 6eed168b7d
1 changed files with 15 additions and 5 deletions
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20
src/ssb.c
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@ -563,8 +563,10 @@ bool tf_ssb_id_str_to_bin(uint8_t* bin, const char* str)
static void _tf_ssb_notify_connections_changed(tf_ssb_t* ssb, tf_ssb_change_t change, tf_ssb_connection_t* connection)
{
for (tf_ssb_connections_changed_callback_node_t* node = ssb->connections_changed; node; node = node->next)
tf_ssb_connections_changed_callback_node_t* next = NULL;
for (tf_ssb_connections_changed_callback_node_t* node = ssb->connections_changed; node; node = next)
{
next = node->next;
node->callback(ssb, change, connection, node->user_data);
}
}
@ -2088,8 +2090,10 @@ static void _tf_ssb_on_broadcast_listener_alloc(uv_handle_t* handle, size_t sugg
static void _tf_ssb_notify_broadcasts_changed(tf_ssb_t* ssb)
{
for (tf_ssb_broadcasts_changed_callback_node_t* node = ssb->broadcasts_changed; node; node = node->next)
tf_ssb_broadcasts_changed_callback_node_t* next = NULL;
for (tf_ssb_broadcasts_changed_callback_node_t* node = ssb->broadcasts_changed; node; node = next)
{
next = node->next;
if (node->callback)
{
node->callback(ssb, node->user_data);
@ -2162,8 +2166,10 @@ static void _tf_ssb_on_broadcast_listener_recv(uv_udp_t* handle, ssize_t nread,
void tf_ssb_visit_broadcasts(tf_ssb_t* ssb, void (*callback)(const struct sockaddr_in* addr, const uint8_t* pub, void* user_data), void* user_data)
{
time_t now = time(NULL);
for (tf_ssb_broadcast_t* node = ssb->broadcasts; node; node = node->next)
tf_ssb_broadcast_t* next = NULL;
for (tf_ssb_broadcast_t* node = ssb->broadcasts; node; node = next)
{
next = node->next;
if (node->mtime - now < 60)
{
callback(&node->addr, node->pub, user_data);
@ -2417,8 +2423,10 @@ void tf_ssb_remove_message_added_callback(tf_ssb_t* ssb, tf_ssb_message_added_ca
void tf_ssb_notify_message_added(tf_ssb_t* ssb, const char* id)
{
for (tf_ssb_message_added_callback_node_t* node = ssb->message_added; node; node = node->next)
tf_ssb_message_added_callback_node_t* next = NULL;
for (tf_ssb_message_added_callback_node_t* node = ssb->message_added; node; node = next)
{
next = node->next;
node->callback(ssb, id, node->user_data);
}
}
@ -2461,8 +2469,10 @@ void tf_ssb_remove_blob_want_added_callback(tf_ssb_t* ssb, tf_ssb_blob_want_adde
void tf_ssb_notify_blob_want_added(tf_ssb_t* ssb, const char* id)
{
for (tf_ssb_blob_want_added_callback_node_t* node = ssb->blob_want_added; node; node = node->next)
tf_ssb_blob_want_added_callback_node_t* next = NULL;
for (tf_ssb_blob_want_added_callback_node_t* node = ssb->blob_want_added; node; node = next)
{
next = node->next;
node->callback(ssb, id, node->user_data);
}
}