fuzz-tests: add a test for handle_peer_error_or_warning()

tests/fuzz/Makefile

@@ -13,24 +13,24 @@ FUZZ_TARGETS_OBJS := $(FUZZ_TARGETS_SRC:.c=.o)
 FUZZ_TARGETS_BIN := $(FUZZ_TARGETS_SRC:.c=)
 
 FUZZ_COMMON_OBJS := \
-	common/amount.o					\
 	common/addr.o					\
+	common/amount.o					\
 	common/autodata.o				\
 	common/base32.o					\
 	common/base64.o					\
 	common/bech32.o					\
 	common/bech32_util.o				\
-	common/bip32.o					\
 	common/bigsize.o				\
+	common/bip32.o					\
 	common/blockheight_states.o			\
 	common/bolt11.o					\
 	common/bolt12_merkle.o				\
 	common/channel_config.o				\
+	common/channel_id.o				\
+	common/channel_type.o				\
 	common/close_tx.o				\
 	common/configdir.o				\
 	common/configvar.o				\
-	common/channel_id.o				\
-	common/channel_type.o				\
 	common/cryptomsg.o				\
 	common/daemon.o					\
 	common/daemon_conn.o				\
@@ -41,29 +41,29 @@ FUZZ_COMMON_OBJS := \
 	common/hash_u5.o				\
 	common/hsm_encryption.o				\
 	common/htlc_state.o				\
-	common/permute_tx.o				\
 	common/initial_channel.o			\
 	common/initial_commit_tx.o			\
 	common/key_derive.o				\
 	common/keyset.o					\
-	common/msg_queue.o				\
 	common/memleak.o				\
+	common/msg_queue.o				\
 	common/node_id.o				\
+	common/permute_tx.o				\
 	common/psbt_keypath.o				\
-	common/wireaddr.o				\
 	common/sciddir_or_pubkey.o			\
 	common/setup.o					\
 	common/status.o					\
 	common/status_wire.o				\
 	common/status_wiregen.o				\
 	common/utils.o					\
 	common/version.o				\
+	common/wireaddr.o				\
 	wire/bolt12_wiregen.o				\
+	wire/channel_type_wiregen.o			\
 	wire/fromwire.o					\
 	wire/onion_wiregen.o				\
 	wire/peer_wire.o				\
 	wire/peer_wiregen.o				\
-	wire/channel_type_wiregen.o			\
 	wire/tlvstream.o				\
 	wire/towire.o					\
 	wire/wire_io.o					\
@@ -72,5 +72,11 @@ FUZZ_COMMON_OBJS := \
 $(FUZZ_TARGETS_OBJS): $(COMMON_HEADERS) $(WIRE_HEADERS) $(COMMON_SRC)
 $(FUZZ_TARGETS_BIN): $(LIBFUZZ_OBJS) $(FUZZ_COMMON_OBJS) $(BITCOIN_OBJS)
 
+tests/fuzz/fuzz-error-warning:	common/peer_billboard.o		\
+				common/wire_error.o		\
+				common/peer_io.o		\
+				common/read_peer_msg.o		\
+				common/peer_status_wiregen.o
+
 ALL_C_SOURCES += $(FUZZ_TARGETS_SRC) $(LIBFUZZ_SRC)
 ALL_FUZZ_TARGETS += $(FUZZ_TARGETS_BIN)

tests/fuzz/corpora/fuzz-error-warning/4ff447b8ef42ca51fa6fb287bed8d40f49be58f1

@@ -0,0 +1 @@
+]

tests/fuzz/corpora/fuzz-error-warning/7c4d33785daa5c2370201ffa236b427aa37c9996

@@ -0,0 +1 @@
+&

tests/fuzz/corpora/fuzz-error-warning/adc83b19e793491b1c6ea0fd8b46cd9f32e592fc

@@ -0,0 +1 @@
+

tests/fuzz/corpora/fuzz-error-warning/b3c59681be1702bfdf21cde98e527c44a79aaa3c

@@ -0,0 +1 @@
+?

tests/fuzz/corpora/fuzz-error-warning/cf7e40dc388a21da7dec293da7433a1f4b5f392a

@@ -0,0 +1 @@
+

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tests/fuzz/corpora/fuzz-error-warning/d4d3a279af396d8a008a01df9a350554ce045f29

@@ -0,0 +1,2 @@
+
+

tests/fuzz/corpora/fuzz-error-warning/d52d59f9c0ff7f6fd265d517d63b49e1fcd81aba

@@ -0,0 +1 @@
+&

tests/fuzz/corpora/fuzz-error-warning/f3d8d414d0ad0c180a9121ed400c59280746ad6d

@@ -0,0 +1 @@
+

tests/fuzz/fuzz-error-warning.c

@@ -0,0 +1,42 @@
+#include "config.h"
+#include <stdio.h>
+#include <fcntl.h>
+#include <setjmp.h>
+#include <common/per_peer_state.h>
+#include <common/peer_failed.h>
+#include <common/read_peer_msg.h>
+#include <common/status.h>
+#include <common/utils.h>
+#include <tests/fuzz/libfuzz.h>
+
+static jmp_buf exit_jmp;
+
+/* MOCKS START */
+/* Stub for peer_failed_connection_lost */
+void peer_failed_connection_lost(void)
+{ fprintf(stderr, "peer_failed_connection_lost called!\n"); abort(); }
+/* Stub for peer_failed_received_errmsg */
+void peer_failed_received_errmsg(struct per_peer_state *pps UNNEEDED,
+				 bool disconnect UNNEEDED,
+				 const char *desc)
+
+{ longjmp(exit_jmp, 1); }
+/* MOCKS END */
+
+void init(int *argc, char ***argv)
+{
+	int devnull = open("/dev/null", O_WRONLY);
+	status_setup_sync(devnull);
+}
+
+void run(const u8 *data, size_t size)
+{
+	if (setjmp(exit_jmp) != 0)
+		return;
+
+	u8 *msg = tal_dup_arr(tmpctx, u8, data, size, 0);
+	struct per_peer_state pps = { .peer_fd = -1 };
+	handle_peer_error_or_warning(&pps, msg);
+
+	clean_tmpctx();
+}