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s3: Limit the number of unexpected packets per client to 10

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Non-reading clients could maliciously make nmbd allocate memory
This commit is contained in:
Volker Lendecke 2011-01-05 14:34:04 +01:00
parent 5f4ff3bfbd
commit 0cff82e054
1 changed files with 8 additions and 0 deletions
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8
source3/libsmb/unexpected.c
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@ -672,6 +672,14 @@ static void nb_packet_client_send(struct nb_packet_client *client,
struct nb_packet_client_state *state;
struct tevent_req *req;
if (tevent_queue_length(client->out_queue) > 10) {
/*
* Skip clients that don't listen anyway, some form of DoS
* protection
*/
return;
}
state = TALLOC_ZERO_P(client, struct nb_packet_client_state);
if (state == NULL) {
DEBUG(10, ("talloc failed\n"));