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mdns: fix possible crash when packet scheduled to transmit contained service which might have been already removed

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packets scheduled to transmit are pushed to action queue and removed from tx_queue_head structure, which is searched for all remaining services and while service is removed, then service questions/asnwers are also removed from this structure. This update fixes possible crash when packet is pushed to action queue, and when service is removed, its answers are removed from tx_queue_head, but not from action queue. this could lead to a crash when the packet is poped from action queue containing questions/answers to already removed (freed) service

Closes IDF-504


* Original commit: espressif/esp-idf@67051a286b
This commit is contained in:
David Cermak
2019-02-25 14:29:39 +01:00
committed by suren-gabrielyan-espressif
parent 34f6d8dd33
commit 450cbf03cf
2 changed files with 22 additions and 3 deletions
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components/mdns/private_include/mdns_private.h
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@ -289,6 +289,7 @@ typedef struct mdns_tx_packet_s {
mdns_out_answer_t * answers;
mdns_out_answer_t * servers;
mdns_out_answer_t * additional;
bool queued;
} mdns_tx_packet_t;
typedef struct {