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OSS-Fuzz: Fix block_check_fuzzer

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Signed-off-by: Arthur Chan <arthur.chan@adalogics.com>
This commit is contained in:
Arthur Chan authored and Jon Shallow committed 2026-05-07 14:22:46 +01:00
1 parent a77c2c64fe
commit feab110c7f
1 file changed
+24
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tests/oss-fuzz/block_check_target.c
+24
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@@ -2,6 +2,13 @@
#include <stdint.h>
#include <string.h>
static int
fuzz_event_handler(coap_session_t *session, const coap_event_t event) {
(void)session;
(void)event;
return 0;
}
static uint8_t test_data[4096];
int
@@ -24,6 +31,7 @@ LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
if (!ctx) {
return 0;
}
coap_register_event_handler(ctx, fuzz_event_handler);
if (data[0] & 0x01) {
ctx->block_mode |= COAP_BLOCK_USE_LIBCOAP;
@@ -62,6 +70,22 @@ LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
}
uint32_t block_num = (size > 4) ? (data[4] % 16) : 0;
/* Populate lg_xmit so timeout functions iterate a non-empty list */
{
uint32_t saved_mode = session->block_mode;
session->block_mode |= COAP_BLOCK_USE_LIBCOAP;
coap_pdu_t *setup_pdu = coap_pdu_init(COAP_MESSAGE_CON, COAP_REQUEST_CODE_PUT,
coap_new_message_id(session),
coap_session_max_pdu_size(session));
if (setup_pdu) {
coap_add_option(setup_pdu, COAP_OPTION_URI_PATH, 4, (const uint8_t *)"test");
coap_add_data_large_request_lkd(session, setup_pdu, sizeof(test_data),
test_data, NULL, NULL);
coap_delete_pdu(setup_pdu);
}
session->block_mode = saved_mode;
}
coap_tick_t now, tim_rem;
coap_ticks(&now);