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access only when parsing is valid

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This commit is contained in:
Sergio R. Caprile 2023-06-29 18:37:10 -03:00
parent 1b9b8e3f6c
commit dc0f9aca4a
1 changed files with 22 additions and 19 deletions
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41
test/fuzz.c
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@ -21,14 +21,15 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
mg_dns_parse(NULL, 0, &dm); mg_dns_parse(NULL, 0, &dm);
struct mg_http_message hm; struct mg_http_message hm;
mg_http_parse((const char *) data, size, &hm); if (mg_http_parse((const char *) data, size, &hm) > 0) {
mg_crc32(0, hm.method.ptr, hm.method.len); mg_crc32(0, hm.method.ptr, hm.method.len);
mg_crc32(0, hm.uri.ptr, hm.uri.len); mg_crc32(0, hm.uri.ptr, hm.uri.len);
mg_crc32(0, hm.uri.ptr, hm.uri.len); mg_crc32(0, hm.uri.ptr, hm.uri.len);
for (size_t i = 0; i < sizeof(hm.headers) / sizeof(hm.headers[0]) ; i++) { for (size_t i = 0; i < sizeof(hm.headers) / sizeof(hm.headers[0]); i++) {
struct mg_str *k = &hm.headers[i].name, *v = &hm.headers[i].value; struct mg_str *k = &hm.headers[i].name, *v = &hm.headers[i].value;
mg_crc32(0, k->ptr, k->len); mg_crc32(0, k->ptr, k->len);
mg_crc32(0, v->ptr, v->len); mg_crc32(0, v->ptr, v->len);
}
} }
mg_http_parse(NULL, 0, &hm); mg_http_parse(NULL, 0, &hm);
@ -41,15 +42,17 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
mg_url_decode(NULL, 0, tmp, 1, 1); mg_url_decode(NULL, 0, tmp, 1, 1);
struct mg_mqtt_message mm; struct mg_mqtt_message mm;
mg_mqtt_parse(data, size, 0, &mm); if (mg_mqtt_parse(data, size, 0, &mm) == MQTT_OK) {
mg_crc32(0, mm.topic.ptr, mm.topic.len); mg_crc32(0, mm.topic.ptr, mm.topic.len);
mg_crc32(0, mm.data.ptr, mm.data.len); mg_crc32(0, mm.data.ptr, mm.data.len);
mg_crc32(0, mm.dgram.ptr, mm.dgram.len); mg_crc32(0, mm.dgram.ptr, mm.dgram.len);
}
mg_mqtt_parse(NULL, 0, 0, &mm); mg_mqtt_parse(NULL, 0, 0, &mm);
mg_mqtt_parse(data, size, 5, &mm); if (mg_mqtt_parse(data, size, 5, &mm) == MQTT_OK) {
mg_crc32(0, mm.topic.ptr, mm.topic.len); mg_crc32(0, mm.topic.ptr, mm.topic.len);
mg_crc32(0, mm.data.ptr, mm.data.len); mg_crc32(0, mm.data.ptr, mm.data.len);
mg_crc32(0, mm.dgram.ptr, mm.dgram.len); mg_crc32(0, mm.dgram.ptr, mm.dgram.len);
}
mg_mqtt_parse(NULL, 0, 5, &mm); mg_mqtt_parse(NULL, 0, 5, &mm);
mg_sntp_parse(data, size); mg_sntp_parse(data, size);
@ -73,9 +76,9 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
if (size > 0) { if (size > 0) {
struct mg_tcpip_if mif = {.ip = 0x01020304, struct mg_tcpip_if mif = {.ip = 0x01020304,
.mask = 255, .mask = 255,
.gw = 0x01010101, .gw = 0x01010101,
.driver = &mg_tcpip_driver_mock}; .driver = &mg_tcpip_driver_mock};
struct mg_mgr mgr; struct mg_mgr mgr;
mg_mgr_init(&mgr); mg_mgr_init(&mgr);
mg_tcpip_init(&mgr, &mif); mg_tcpip_init(&mgr, &mif);