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gnrc_sock: add comment to fuzzing termination condition

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This commit is contained in:
Sören Tempel 2020-05-26 17:10:58 +02:00
parent e24774b739
commit f37c1fd9dd
1 changed files with 7 additions and 0 deletions
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7
sys/net/gnrc/sock/gnrc_sock.c
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@ -93,6 +93,13 @@ ssize_t gnrc_sock_recv(gnrc_sock_reg_t *reg, gnrc_pktsnip_t **pkt_out,
gnrc_pktsnip_t *pkt, *netif;
msg_t msg;
/* The fuzzing module is only enabled when building a fuzzing
* application from the fuzzing/ subdirectory. When using gnrc_sock
* the fuzzer assumes that gnrc_sock_recv is called in a loop. If it
* is called again and the previous return value was the special
* crafted fuzzing packet, the fuzzing application terminates.
*
* sock_async_event has its on fuzzing termination condition. */
#if defined(MODULE_FUZZING) && !defined(MODULE_SOCK_ASYNC_EVENT)
if (gnrc_sock_prevpkt && gnrc_sock_prevpkt == gnrc_pktbuf_fuzzptr) {
exit(EXIT_SUCCESS);