/* $NetBSD: fuzz.c,v 1.3.4.2 2024/02/29 12:28:18 martin Exp $ */ /* * Copyright (C) Internet Systems Consortium, Inc. ("ISC") * * SPDX-License-Identifier: MPL-2.0 * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, you can obtain one at https://mozilla.org/MPL/2.0/. * * See the COPYRIGHT file distributed with this work for additional * information regarding copyright ownership. */ #include #include #include #ifdef ENABLE_AFL #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * We are using pthreads directly because we might be using it with * unthreaded version of BIND, where all thread functions are * mocks. Since AFL for now only works on Linux it's not a problem. */ static pthread_cond_t cond; static pthread_mutex_t mutex; static bool ready; /* * In "client:" mode, this thread reads fuzzed query messages from AFL * from standard input and sends it to named's listening port (DNS) that * is passed in the -A client:
: option. It can be used to * test named from the client side. */ static void * fuzz_thread_client(void *arg) { char *host; char *port; struct sockaddr_in servaddr; int sockfd; void *buf; UNUSED(arg); /* * Parse named -A argument in the "address:port" syntax. Due to * the syntax used, this only supports IPv4 addresses. */ host = strdup(named_g_fuzz_addr); RUNTIME_CHECK(host != NULL); port = strchr(host, ':'); RUNTIME_CHECK(port != NULL); *port = 0; ++port; memset(&servaddr, 0, sizeof(servaddr)); servaddr.sin_family = AF_INET; RUNTIME_CHECK(inet_pton(AF_INET, host, &servaddr.sin_addr) == 1); servaddr.sin_port = htons(atoi(port)); free(host); /* * Wait for named to start. This is set in run_server() in the * named thread. */ while (!named_g_run_done) { usleep(10000); } sockfd = socket(AF_INET, SOCK_DGRAM, 0); RUNTIME_CHECK(sockfd != -1); buf = malloc(65536); RUNTIME_CHECK(buf != NULL); /* * Processing fuzzed packets 100,000 times before shutting down * the app. */ #ifdef __AFL_LOOP for (int loop = 0; loop < 100000; loop++) { #else /* ifdef __AFL_LOOP */ { #endif /* ifdef __AFL_LOOP */ ssize_t length; ssize_t sent; length = read(0, buf, 65536); if (length <= 0) { usleep(1000000); goto next; } /* * Ignore packets that are larger than 4096 bytes. */ if (length > 4096) { /* * AFL_CMIN doesn't support persistent mode, so * shutdown the server. */ if (getenv("AFL_CMIN")) { free(buf); close(sockfd); named_server_flushonshutdown(named_g_server, false); isc_app_shutdown(); return (NULL); } raise(SIGSTOP); goto next; } RUNTIME_CHECK(pthread_mutex_lock(&mutex) == 0); ready = false; sent = sendto(sockfd, buf, length, 0, (struct sockaddr *)&servaddr, sizeof(servaddr)); RUNTIME_CHECK(sent == length); /* * Read the reply message from named to unclog it. Don't * bother if there isn't a reply. */ (void)recvfrom(sockfd, buf, 65536, MSG_DONTWAIT, NULL, NULL); while (!ready) { pthread_cond_wait(&cond, &mutex); } RUNTIME_CHECK(pthread_mutex_unlock(&mutex) == 0); next:; } free(buf); close(sockfd); named_server_flushonshutdown(named_g_server, false); isc_app_shutdown(); return (NULL); } /* * In "resolver:" mode, this thread reads fuzzed reply messages from AFL * from standard input. It also sets up a listener as a remote * authoritative server and sends a driver query to the client side of * named(resolver). When named(resolver) connects to this authoritative * server, this thread writes the fuzzed reply message from AFL to it. * * -A resolver:::: * * Here, : is where named(resolver) is listening on. * : is where the thread is supposed to setup the * authoritative server. This address should be configured via the root * zone to be the authoritiative server for aaaaaaaaaa.example. * * named(resolver) when being fuzzed will not cache answers. */ static void * fuzz_thread_resolver(void *arg) { char *sqtype, *shost, *sport, *rhost, *rport; struct sockaddr_in servaddr, recaddr, recvaddr; /* * Query for aaaaaaaaaa.example./A in wire format with RD=1, * EDNS and DO=1. 0x88, 0x0c at the start is the ID field which * will be updated for each query. */ char respacket[] = { 0x88, 0x0c, 0x01, 0x20, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x0a, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x07, 0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x29, 0x10, 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00 }; /* * Response for example./DNSKEY in wire format. Note that RRSIGs * were generated with this DNSKEY that are used as seeds for * AFL in the DNSSEC fuzzing job. So the DNSKEY content of this * message must not change, or the corresponding RRSIGs will * have to be updated. 0x8d, 0xf6 at the start is the ID field * which will be made to match the query. */ const uint8_t dnskey_wf[] = { 0x8d, 0xf6, 0x84, 0x00, 0x00, 0x01, 0x00, 0x02, 0x00, 0x00, 0x00, 0x01, 0x07, 0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65, 0x00, 0x00, 0x30, 0x00, 0x01, 0xc0, 0x0c, 0x00, 0x30, 0x00, 0x01, 0x00, 0x00, 0x01, 0x2c, 0x01, 0x08, 0x01, 0x00, 0x03, 0x08, 0x03, 0x01, 0x00, 0x01, 0xbd, 0x81, 0xdc, 0x7f, 0x16, 0xd4, 0x81, 0x7c, 0x1f, 0x9f, 0x6a, 0x68, 0xdd, 0xd4, 0xda, 0x48, 0xd9, 0x1c, 0xbd, 0xa6, 0x46, 0x1a, 0xf0, 0xb4, 0xb9, 0xec, 0x3d, 0x6c, 0x0b, 0x57, 0xc7, 0xd6, 0x54, 0x66, 0xe6, 0x6c, 0xd5, 0x90, 0x3a, 0x78, 0x7d, 0x7f, 0x78, 0x80, 0xa2, 0x89, 0x61, 0x6d, 0x8a, 0x2b, 0xcd, 0x0a, 0x77, 0x7a, 0xad, 0xc9, 0x61, 0x53, 0x53, 0x8c, 0x99, 0x72, 0x86, 0x14, 0x74, 0x9c, 0x49, 0x2a, 0x47, 0x23, 0xf7, 0x02, 0x07, 0x73, 0x1c, 0x5c, 0x2e, 0xb4, 0x9a, 0xa4, 0xd7, 0x98, 0x42, 0xc3, 0xd2, 0xfe, 0xbf, 0xf3, 0xb3, 0x6a, 0x52, 0x92, 0xd5, 0xfa, 0x47, 0x00, 0xe3, 0xd9, 0x59, 0x31, 0x95, 0x48, 0x40, 0xfc, 0x06, 0x73, 0x90, 0xc6, 0x73, 0x96, 0xba, 0x29, 0x91, 0xe2, 0xac, 0xa3, 0xa5, 0x6d, 0x91, 0x6d, 0x52, 0xb9, 0x34, 0xba, 0x68, 0x4f, 0xad, 0xf0, 0xc3, 0xf3, 0x1d, 0x6d, 0x61, 0x76, 0xe5, 0x3d, 0xa3, 0x9b, 0x2a, 0x0c, 0x92, 0xb3, 0x78, 0x6b, 0xf1, 0x20, 0xd6, 0x90, 0xb7, 0xac, 0xe2, 0xf8, 0x2b, 0x94, 0x10, 0x79, 0xce, 0xa8, 0x60, 0x42, 0xea, 0x6a, 0x18, 0x2f, 0xc0, 0xd8, 0x05, 0x0a, 0x3b, 0x06, 0x0f, 0x02, 0x7e, 0xff, 0x33, 0x46, 0xee, 0xb6, 0x21, 0x25, 0x90, 0x63, 0x4b, 0x3b, 0x5e, 0xb2, 0x72, 0x3a, 0xcb, 0x91, 0x41, 0xf4, 0x20, 0x50, 0x78, 0x1c, 0x93, 0x95, 0xda, 0xfa, 0xae, 0x85, 0xc5, 0xd7, 0x6b, 0x92, 0x0c, 0x70, 0x6b, 0xe4, 0xb7, 0x29, 0x3a, 0x2e, 0x18, 0x88, 0x82, 0x33, 0x7c, 0xa8, 0xea, 0xb8, 0x31, 0x8f, 0xaf, 0x50, 0xc5, 0x9c, 0x08, 0x56, 0x8f, 0x09, 0x76, 0x4e, 0xdf, 0x97, 0x75, 0x9d, 0x00, 0x52, 0x7f, 0xdb, 0xec, 0x30, 0xcb, 0x1c, 0x4c, 0x2a, 0x21, 0x93, 0xc4, 0x6d, 0x85, 0xa9, 0x40, 0x3b, 0xc0, 0x0c, 0x00, 0x2e, 0x00, 0x01, 0x00, 0x00, 0x01, 0x2c, 0x01, 0x1b, 0x00, 0x30, 0x08, 0x01, 0x00, 0x00, 0x01, 0x2c, 0x67, 0x74, 0x85, 0x80, 0x58, 0xb3, 0xc5, 0x17, 0x36, 0x90, 0x07, 0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65, 0x00, 0x45, 0xac, 0xd3, 0x82, 0x69, 0xf3, 0x10, 0x3a, 0x97, 0x2c, 0x6a, 0xa9, 0x78, 0x99, 0xea, 0xb0, 0xcc, 0xf7, 0xaf, 0x33, 0x51, 0x5b, 0xdf, 0x77, 0x04, 0x18, 0x14, 0x99, 0x61, 0xeb, 0x8d, 0x76, 0x3f, 0xd1, 0x71, 0x14, 0x43, 0x80, 0x53, 0xc2, 0x3b, 0x9f, 0x09, 0x4f, 0xb3, 0x51, 0x04, 0x89, 0x0e, 0xc8, 0x54, 0x12, 0xcd, 0x07, 0x20, 0xbe, 0x94, 0xc2, 0xda, 0x99, 0xdd, 0x1e, 0xf8, 0xb0, 0x84, 0x2e, 0xf9, 0x19, 0x35, 0x36, 0xf5, 0xd0, 0x5d, 0x82, 0x18, 0x74, 0xa0, 0x00, 0xb6, 0x15, 0x57, 0x40, 0x5f, 0x78, 0x2d, 0x27, 0xac, 0xc7, 0x8a, 0x29, 0x55, 0xa9, 0xcd, 0xbc, 0xf7, 0x3e, 0xff, 0xae, 0x1a, 0x5a, 0x1d, 0xac, 0x0d, 0x78, 0x0e, 0x08, 0x33, 0x6c, 0x59, 0x70, 0x40, 0xb9, 0x65, 0xbd, 0x35, 0xbb, 0x9a, 0x70, 0xdc, 0x93, 0x66, 0xb0, 0xef, 0xfe, 0xf0, 0x32, 0xa6, 0xee, 0xb7, 0x03, 0x89, 0xa2, 0x4d, 0xe0, 0xf1, 0x20, 0xdf, 0x39, 0xe8, 0xe3, 0xcc, 0x95, 0xe9, 0x9a, 0xad, 0xbf, 0xbd, 0x7c, 0xf7, 0xd7, 0xde, 0x47, 0x9e, 0xf6, 0x17, 0xbb, 0x84, 0xa9, 0xed, 0xf2, 0x45, 0x61, 0x6d, 0x13, 0x0b, 0x06, 0x29, 0x50, 0xde, 0xfd, 0x42, 0xb0, 0x66, 0x2c, 0x1c, 0x2b, 0x63, 0xcb, 0x4e, 0xb9, 0x31, 0xc4, 0xea, 0xd2, 0x07, 0x3a, 0x08, 0x79, 0x19, 0x4b, 0x4c, 0x50, 0x97, 0x02, 0xd7, 0x26, 0x41, 0x2f, 0xdd, 0x57, 0xaa, 0xb0, 0xa0, 0x21, 0x4e, 0x74, 0xb6, 0x97, 0x4b, 0x8b, 0x09, 0x9c, 0x3d, 0x29, 0xfb, 0x12, 0x27, 0x47, 0x8f, 0xb8, 0xc5, 0x8e, 0x65, 0xcd, 0xca, 0x2f, 0xba, 0xf5, 0x3e, 0xec, 0x56, 0xc3, 0xc9, 0xa1, 0x62, 0x7d, 0xf2, 0x9f, 0x90, 0x16, 0x1d, 0xbf, 0x97, 0x28, 0xe1, 0x92, 0xb1, 0x53, 0xab, 0xc4, 0xe0, 0x99, 0xbb, 0x19, 0x90, 0x7c, 0x00, 0x00, 0x29, 0x10, 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00 }; int sockfd; int listenfd; int loop; uint16_t qtype; char *buf, *rbuf; char *nameptr; unsigned int i; uint8_t llen; uint64_t seed; UNUSED(arg); /* * Parse named -A argument in the "qtype:saddress:sport:raddress:rport" * syntax. Due to the syntax used, this only supports IPv4 addresses. */ sqtype = strdup(named_g_fuzz_addr); RUNTIME_CHECK(sqtype != NULL); shost = strchr(sqtype, ':'); RUNTIME_CHECK(shost != NULL); *shost = 0; shost++; sport = strchr(shost, ':'); RUNTIME_CHECK(sport != NULL); *sport = 0; sport++; rhost = strchr(sport, ':'); RUNTIME_CHECK(rhost != NULL); *rhost = 0; rhost++; rport = strchr(rhost, ':'); RUNTIME_CHECK(rport != NULL); *rport = 0; rport++; /* * Patch in the qtype into the question section of respacket. */ qtype = atoi(sqtype); respacket[32] = (qtype >> 8) & 0xff; respacket[33] = qtype & 0xff; memset(&servaddr, 0, sizeof(servaddr)); servaddr.sin_family = AF_INET; RUNTIME_CHECK(inet_pton(AF_INET, shost, &servaddr.sin_addr) == 1); servaddr.sin_port = htons(atoi(sport)); memset(&recaddr, 0, sizeof(recaddr)); recaddr.sin_family = AF_INET; RUNTIME_CHECK(inet_pton(AF_INET, rhost, &recaddr.sin_addr) == 1); recaddr.sin_port = htons(atoi(rport)); free(sqtype); /* * Wait for named to start. This is set in run_server() in the * named thread. */ while (!named_g_run_done) { usleep(10000); } sockfd = socket(AF_INET, SOCK_DGRAM, 0); RUNTIME_CHECK(sockfd != -1); listenfd = socket(AF_INET, SOCK_DGRAM, 0); RUNTIME_CHECK(listenfd != -1); RUNTIME_CHECK(bind(listenfd, (struct sockaddr *)&recaddr, sizeof(struct sockaddr_in)) == 0); buf = malloc(65536); rbuf = malloc(65536); RUNTIME_CHECK(buf != NULL); RUNTIME_CHECK(rbuf != NULL); seed = 42; /* * Processing fuzzed packets 100,000 times before shutting down * the app. */ for (loop = 0; loop < 100000; loop++) { ssize_t length; ssize_t sent; unsigned short id; socklen_t socklen; memset(buf, 0, 12); length = read(0, buf, 65536); if (length <= 0) { usleep(1000000); continue; } if (length > 4096) { if (getenv("AFL_CMIN")) { free(buf); free(rbuf); close(sockfd); close(listenfd); named_server_flushonshutdown(named_g_server, false); isc_app_shutdown(); return (NULL); } raise(SIGSTOP); continue; } if (length < 12) { length = 12; } RUNTIME_CHECK(pthread_mutex_lock(&mutex) == 0); ready = false; /* Use a unique query ID. */ seed = 1664525 * seed + 1013904223; id = seed & 0xffff; respacket[0] = (id >> 8) & 0xff; respacket[1] = id & 0xff; /* * Flush any pending data on the authoritative server. */ socklen = sizeof(recvaddr); (void)recvfrom(listenfd, rbuf, 65536, MSG_DONTWAIT, (struct sockaddr *)&recvaddr, &socklen); /* * Send a fixed client query to named(resolver) of * aaaaaaaaaa.example./A. This is the starting query * driver. */ sent = sendto(sockfd, respacket, sizeof(respacket), 0, (struct sockaddr *)&servaddr, sizeof(servaddr)); RUNTIME_CHECK(sent == sizeof(respacket)); /* * named(resolver) will process the query above and send * an upstream query to the authoritative server. We * handle that here as the upstream authoritative server * on listenfd. */ socklen = sizeof(recvaddr); sent = recvfrom(listenfd, rbuf, 65536, 0, (struct sockaddr *)&recvaddr, &socklen); RUNTIME_CHECK(sent > 0); /* * Copy QID and set QR so that response is always * accepted by named(resolver). */ buf[0] = rbuf[0]; buf[1] = rbuf[1]; buf[2] |= 0x80; /* * NOTE: We are not copying the QNAME or setting * rcode=NOERROR each time. So the resolver may fail the * client query (driver) / wander due to this. AA flag * may also not be set based on the contents of the AFL * fuzzed packet. */ /* * A hack - set QTYPE to the one from query so that we * can easily share packets between instances. If we * write over something else we'll get FORMERR anyway. */ /* Skip DNS header to get to the name */ nameptr = buf + 12; /* Skip the name to get to the qtype */ i = 0; while (((llen = nameptr[i]) != 0) && (i < 255) && (((nameptr + i + 1 + llen) - buf) < length)) { i += 1 + llen; } if (i <= 255) { nameptr += 1 + i; /* Patch the qtype */ if ((nameptr - buf) < (length - 2)) { *nameptr++ = (qtype >> 8) & 0xff; *nameptr++ = qtype & 0xff; } /* Patch the qclass */ if ((nameptr - buf) < (length - 2)) { *nameptr++ = 0; *nameptr++ = 1; } } /* * Send the reply to named(resolver). */ sent = sendto(listenfd, buf, length, 0, (struct sockaddr *)&recvaddr, sizeof(recvaddr)); RUNTIME_CHECK(sent == length); /* We might get additional questions here (e.g. for CNAME). */ for (;;) { fd_set fds; struct timeval tv; int rv; int max; FD_ZERO(&fds); FD_SET(listenfd, &fds); FD_SET(sockfd, &fds); tv.tv_sec = 10; tv.tv_usec = 0; max = (listenfd > sockfd ? listenfd : sockfd) + 1; rv = select(max, &fds, NULL, NULL, &tv); RUNTIME_CHECK(rv > 0); if (FD_ISSET(sockfd, &fds)) { /* * It's the reply from named(resolver) * to the client(query driver), so we're * done. */ (void)recvfrom(sockfd, buf, 65536, 0, NULL, NULL); break; } /* * We've got additional question (eg. due to * CNAME). Bounce it - setting QR flag and * NOERROR rcode and sending it back. */ length = recvfrom(listenfd, buf, 65536, 0, (struct sockaddr *)&recvaddr, &socklen); /* * If this is a DNSKEY query, send the DNSKEY, * otherwise, bounce the query. */ /* Skip DNS header to get to the name */ nameptr = buf + 12; /* Skip the name to get to the qtype */ i = 0; while (((llen = nameptr[i]) != 0) && (i < 255) && (((nameptr + i + 1 + llen) - buf) < length)) { i += 1 + llen; } if (i <= 255) { nameptr += 1 + i; /* * Patch in the DNSKEY reply without * touching the ID field. Note that we * don't compare the name in the * question section in the query, but we * don't expect to receive any query for * type DNSKEY but for the name * "example." */ if ((nameptr - buf) < (length - 2)) { uint8_t hb, lb; hb = *nameptr++; lb = *nameptr++; qtype = (hb << 8) | lb; if (qtype == 48) { memmove(buf + 2, dnskey_wf + 2, sizeof(dnskey_wf) - 2); length = sizeof(dnskey_wf); } } } buf[2] |= 0x80; buf[3] &= 0xF0; sent = sendto(listenfd, buf, length, 0, (struct sockaddr *)&recvaddr, sizeof(recvaddr)); RUNTIME_CHECK(sent == length); } while (!ready) { pthread_cond_wait(&cond, &mutex); } RUNTIME_CHECK(pthread_mutex_unlock(&mutex) == 0); } free(buf); free(rbuf); close(sockfd); close(listenfd); named_server_flushonshutdown(named_g_server, false); isc_app_shutdown(); #ifdef __AFL_LOOP /* * This is here just for the signature, that's how AFL detects * if it's a 'persistent mode' binary. It has to occur somewhere * in the file, that's all. < wpk_> AFL checks the binary for * this signature ("##SIG_AFL_PERSISTENT##") and runs the binary * in persistent mode if it's present. */ __AFL_LOOP(0); #endif /* ifdef __AFL_LOOP */ return (NULL); } /* * In "tcp:", "http:" and "rndc:" modes, this thread reads fuzzed query * blobs from AFL from standard input and sends it to the corresponding * TCP listening port of named (port 53 DNS, or the HTTP statistics * channels listener or the rndc port) that is passed in the -A * :
: option. It can be used to test named from the * client side. */ static void * fuzz_thread_tcp(void *arg) { char *host; char *port; struct sockaddr_in servaddr; int sockfd; char *buf; int loop; UNUSED(arg); /* * Parse named -A argument in the "address:port" syntax. Due to * the syntax used, this only supports IPv4 addresses. */ host = strdup(named_g_fuzz_addr); RUNTIME_CHECK(host != NULL); port = strchr(host, ':'); RUNTIME_CHECK(port != NULL); *port = 0; ++port; memset(&servaddr, 0, sizeof(servaddr)); servaddr.sin_family = AF_INET; RUNTIME_CHECK(inet_pton(AF_INET, host, &servaddr.sin_addr) == 1); servaddr.sin_port = htons(atoi(port)); free(host); /* * Wait for named to start. This is set in run_server() in the * named thread. */ while (!named_g_run_done) { usleep(10000); } buf = malloc(65539); RUNTIME_CHECK(buf != NULL); /* * Processing fuzzed packets 100,000 times before shutting down * the app. */ for (loop = 0; loop < 100000; loop++) { ssize_t length; ssize_t sent; int yes; int r; if (named_g_fuzz_type == isc_fuzz_tcpclient) { /* * To fuzz DNS TCP client we have to put 16-bit * message length preceding the start of packet. */ length = read(0, buf + 2, 65535); buf[0] = (length >> 8) & 0xff; buf[1] = length & 0xff; length += 2; } else { /* * Other types of TCP clients such as HTTP, etc. */ length = read(0, buf, 65535); } if (length <= 0) { usleep(1000000); continue; } if (named_g_fuzz_type == isc_fuzz_http) { /* * This guarantees that the request will be * processed. */ INSIST(length <= 65535); buf[length++] = '\r'; buf[length++] = '\n'; buf[length++] = '\r'; buf[length++] = '\n'; } RUNTIME_CHECK(pthread_mutex_lock(&mutex) == 0); ready = false; yes = 1; sockfd = socket(AF_INET, SOCK_STREAM, 0); RUNTIME_CHECK(sockfd != -1); RUNTIME_CHECK(setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)) == 0); do { r = connect(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr)); if (r != 0) { usleep(10000); } } while (r != 0); /* * Send the fuzzed query blob to the target server. */ sent = write(sockfd, buf, length); RUNTIME_CHECK(sent == length); close(sockfd); while (!ready) { pthread_cond_wait(&cond, &mutex); } RUNTIME_CHECK(pthread_mutex_unlock(&mutex) == 0); } free(buf); close(sockfd); named_server_flushonshutdown(named_g_server, false); isc_app_shutdown(); return (NULL); } #endif /* ENABLE_AFL */ /* * named has finished processing a message and has sent the * reply. Signal the fuzz thread using the condition variable, to read * and process the next item from AFL. */ void named_fuzz_notify(void) { #ifdef ENABLE_AFL if (getenv("AFL_CMIN")) { named_server_flushonshutdown(named_g_server, false); isc_app_shutdown(); return; } raise(SIGSTOP); RUNTIME_CHECK(pthread_mutex_lock(&mutex) == 0); ready = true; RUNTIME_CHECK(pthread_cond_signal(&cond) == 0); RUNTIME_CHECK(pthread_mutex_unlock(&mutex) == 0); #endif /* ENABLE_AFL */ } void named_fuzz_setup(void) { #ifdef ENABLE_AFL if (getenv("__AFL_PERSISTENT") || getenv("AFL_CMIN")) { pthread_t thread; void *(fn) = NULL; switch (named_g_fuzz_type) { case isc_fuzz_client: fn = fuzz_thread_client; break; case isc_fuzz_http: case isc_fuzz_tcpclient: case isc_fuzz_rndc: fn = fuzz_thread_tcp; break; case isc_fuzz_resolver: fn = fuzz_thread_resolver; break; default: RUNTIME_CHECK(fn != NULL); } RUNTIME_CHECK(pthread_mutex_init(&mutex, NULL) == 0); RUNTIME_CHECK(pthread_cond_init(&cond, NULL) == 0); RUNTIME_CHECK(pthread_create(&thread, NULL, fn, NULL) == 0); } #endif /* ENABLE_AFL */ }