fuzz: adds one target with predefined rules

src/Makefile.am

@@ -5,7 +5,7 @@ if BUILD_FUZZTARGETS
     fuzz_confyamlloadstring fuzz_decodepcapfile \
     fuzz_sigpcap fuzz_mimedecparseline
 if HAS_FUZZPCAP
-    bin_PROGRAMS += fuzz_sigpcap_aware
+    bin_PROGRAMS += fuzz_sigpcap_aware fuzz_predefpcap_aware
 endif
 endif
 
@@ -1344,6 +1344,17 @@ else
 endif
 # force usage of CXX for linker
 nodist_EXTRA_fuzz_sigpcap_aware_SOURCES = force-cxx-linking.cxx
+
+fuzz_predefpcap_aware_SOURCES = tests/fuzz/fuzz_predefpcap_aware.c
+fuzz_predefpcap_aware_LDFLAGS = $(LDFLAGS_FUZZ)
+fuzz_predefpcap_aware_LDADD = $(LDADD_FUZZ) -lfuzzpcap
+if HAS_FUZZLDFLAGS
+    fuzz_predefpcap_aware_LDFLAGS += $(LIB_FUZZING_ENGINE)
+else
+    fuzz_predefpcap_aware_SOURCES += tests/fuzz/onefile.c
+endif
+# force usage of CXX for linker
+nodist_EXTRA_fuzz_predefpcap_aware_SOURCES = force-cxx-linking.cxx
 endif
 
 fuzz_mimedecparseline_SOURCES = tests/fuzz/fuzz_mimedecparseline.c

src/tests/fuzz/fuzz_predefpcap_aware.c

@@ -0,0 +1,147 @@
+/**
+ * @file
+ * @author Philippe Antoine <contact@catenacyber.fr>
+ * fuzz target for predefined signatures and pcap (aware)
+ */
+
+#include "suricata-common.h"
+#include "source-pcap-file.h"
+#include "detect-engine.h"
+#include "util-classification-config.h"
+#include "util-reference-config.h"
+#include "app-layer.h"
+#include "tm-queuehandlers.h"
+#include "util-cidr.h"
+#include "util-proto-name.h"
+#include "detect-engine-tag.h"
+#include "detect-engine-threshold.h"
+#include "host-bit.h"
+#include "ippair-bit.h"
+#include "app-layer-htp.h"
+#include "detect-fast-pattern.h"
+#include "util-unittest-helper.h"
+#include "conf-yaml-loader.h"
+#include "pkt-var.h"
+
+#include <fuzz_pcap.h>
+
+int LLVMFuzzerInitialize(const int *argc, char ***argv);
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
+
+static int initialized = 0;
+ThreadVars tv;
+DecodeThreadVars *dtv;
+// FlowWorkerThreadData
+void *fwd;
+SCInstance surifuzz;
+
+#include "confyaml.c"
+
+char *filepath = NULL;
+
+int LLVMFuzzerInitialize(const int *argc, char ***argv)
+{
+    filepath = dirname(strdup((*argv)[0]));
+    return 0;
+}
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
+{
+    FPC_buffer_t pkts;
+    const u_char *pkt;
+    struct pcap_pkthdr header;
+    int r;
+    Packet *p;
+    size_t pcap_cnt = 0;
+
+    if (initialized == 0) {
+        // Redirects logs to /dev/null
+        setenv("SC_LOG_OP_IFACE", "file", 0);
+        setenv("SC_LOG_FILE", "/dev/null", 0);
+
+        InitGlobal();
+
+        GlobalsInitPreConfig();
+        run_mode = RUNMODE_PCAP_FILE;
+        // redirect logs to /tmp
+        ConfigSetLogDirectory("/tmp/");
+        // disables checksums validation for fuzzing
+        if (ConfYamlLoadString(configNoChecksum, strlen(configNoChecksum)) != 0) {
+            abort();
+        }
+        surifuzz.sig_file = malloc(strlen(filepath) + strlen("/fuzz.rules") + 1);
+        memcpy(surifuzz.sig_file, filepath, strlen(filepath));
+        memcpy(surifuzz.sig_file + strlen(filepath), "/fuzz.rules", strlen("/fuzz.rules"));
+        surifuzz.sig_file[strlen(filepath) + strlen("/fuzz.rules")] = 0;
+        surifuzz.sig_file_exclusive = 1;
+        // loads rules after init
+        surifuzz.delayed_detect = 1;
+
+        PostConfLoadedSetup(&surifuzz);
+        PreRunPostPrivsDropInit(run_mode);
+        PostConfLoadedDetectSetup(&surifuzz);
+
+        memset(&tv, 0, sizeof(tv));
+        tv.flow_queue = FlowQueueNew();
+        if (tv.flow_queue == NULL)
+            abort();
+        dtv = DecodeThreadVarsAlloc(&tv);
+        DecodeRegisterPerfCounters(dtv, &tv);
+        tmm_modules[TMM_FLOWWORKER].ThreadInit(&tv, NULL, &fwd);
+        StatsSetupPrivate(&tv);
+
+        extern intmax_t max_pending_packets;
+        max_pending_packets = 128;
+        PacketPoolInit();
+        if (DetectEngineReload(&surifuzz) < 0) {
+            return 0;
+        }
+
+        initialized = 1;
+    }
+
+    if (size < FPC0_HEADER_LEN) {
+        return 0;
+    }
+    // initialize FPC with the buffer
+    if (FPC_init(&pkts, data, size) < 0) {
+        return 0;
+    }
+
+    // loop over packets
+    r = FPC_next(&pkts, &header, &pkt);
+    p = PacketGetFromAlloc();
+    p->ts.tv_sec = header.ts.tv_sec;
+    p->ts.tv_usec = header.ts.tv_usec;
+    p->datalink = pkts.datalink;
+    while (r > 0) {
+        if (PacketCopyData(p, pkt, header.caplen) == 0) {
+            // DecodePcapFile
+            TmEcode ecode = tmm_modules[TMM_DECODEPCAPFILE].Func(&tv, p, dtv);
+            if (ecode == TM_ECODE_FAILED) {
+                break;
+            }
+            Packet *extra_p = PacketDequeueNoLock(&tv.decode_pq);
+            while (extra_p != NULL) {
+                PacketFreeOrRelease(extra_p);
+                extra_p = PacketDequeueNoLock(&tv.decode_pq);
+            }
+            tmm_modules[TMM_FLOWWORKER].Func(&tv, p, fwd);
+            extra_p = PacketDequeueNoLock(&tv.decode_pq);
+            while (extra_p != NULL) {
+                PacketFreeOrRelease(extra_p);
+                extra_p = PacketDequeueNoLock(&tv.decode_pq);
+            }
+        }
+        r = FPC_next(&pkts, &header, &pkt);
+        PACKET_RECYCLE(p);
+        p->ts.tv_sec = header.ts.tv_sec;
+        p->ts.tv_usec = header.ts.tv_usec;
+        p->datalink = pkts.datalink;
+        pcap_cnt++;
+        p->pcap_cnt = pcap_cnt;
+    }
+    PacketFree(p);
+
+    return 0;
+}