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OSS-Fuzz: Add new fuzzer targets json processing

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Signed-off-by: Arthur Chan <arthur.chan@adalogics.com>
This commit is contained in:
Arthur Chan
2026-09-25 05:58:37 +01:00
parent 4f523f41c9
commit 041f30acbe
2 changed files with 92 additions and 1 deletions
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5
Makefile.am
View File

@@ -258,7 +258,8 @@ check_PROGRAMS = \
fuzz/cmd-parse-fuzzer \ fuzz/cmd-parse-fuzzer \
fuzz/format-fuzzer \ fuzz/format-fuzzer \
fuzz/style-fuzzer \ fuzz/style-fuzzer \
fuzz/layout-fuzzer fuzz/layout-fuzzer \
fuzz/json-fuzzer
fuzz_input_fuzzer_LDFLAGS = $(FUZZING_LIBS) fuzz_input_fuzzer_LDFLAGS = $(FUZZING_LIBS)
fuzz_input_fuzzer_LDADD = $(LDADD) $(tmux_OBJECTS) fuzz_input_fuzzer_LDADD = $(LDADD) $(tmux_OBJECTS)
fuzz_cmd_parse_fuzzer_LDFLAGS = $(FUZZING_LIBS) fuzz_cmd_parse_fuzzer_LDFLAGS = $(FUZZING_LIBS)
@@ -269,6 +270,8 @@ fuzz_style_fuzzer_LDFLAGS = $(FUZZING_LIBS)
fuzz_style_fuzzer_LDADD = $(LDADD) $(tmux_OBJECTS) fuzz_style_fuzzer_LDADD = $(LDADD) $(tmux_OBJECTS)
fuzz_layout_fuzzer_LDFLAGS = $(FUZZING_LIBS) fuzz_layout_fuzzer_LDFLAGS = $(FUZZING_LIBS)
fuzz_layout_fuzzer_LDADD = $(LDADD) $(tmux_OBJECTS) fuzz_layout_fuzzer_LDADD = $(LDADD) $(tmux_OBJECTS)
fuzz_json_fuzzer_LDFLAGS = $(FUZZING_LIBS)
fuzz_json_fuzzer_LDADD = $(LDADD) $(tmux_OBJECTS)
endif endif
# Install tmux.1 in the right format. # Install tmux.1 in the right format.

88
fuzz/json-fuzzer.c Normal file
View File

@@ -0,0 +1,88 @@
/*
* Fuzz the tmux JSON parser and serializer.
*/
#include <stdint.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include "tmux.h"
struct event_base *libevent;
static void
walk_json(struct json_node *node)
{
struct json_node *child, *object;
const char *string;
int64_t number;
int boolean;
if (node == NULL)
return;
(void)json_get_string(node, &string);
(void)json_get_number(node, &number);
(void)json_get_boolean(node, &boolean);
if (json_get_object(node, &object) == 0) {
(void)json_find(object, "V");
(void)json_find(object, "L");
}
for (child = json_array_first(node); child != NULL;
child = json_array_next(child))
walk_json(child);
}
int
LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
struct json_node *node;
char *input, *serialized, *cause = NULL;
if (size == 0 || size > 1U << 20)
return 0;
input = malloc(size + 1);
if (input == NULL)
return 0;
memcpy(input, data, size);
input[size] = '\0';
node = json_parse(input, &cause);
free(cause);
if (node != NULL) {
walk_json(node);
serialized = json_to_string(node);
free(serialized);
json_destroy_node(node);
}
free(input);
return 0;
}
int
LLVMFuzzerInitialize(__unused int *argc, __unused char ***argv)
{
const struct options_table_entry *oe;
global_environ = environ_create();
global_options = options_create(NULL);
global_s_options = options_create(NULL);
global_w_options = options_create(NULL);
for (oe = options_table; oe->name != NULL; oe++) {
if (oe->scope & OPTIONS_TABLE_SERVER)
options_default(global_options, oe);
if (oe->scope & OPTIONS_TABLE_SESSION)
options_default(global_s_options, oe);
if (oe->scope & OPTIONS_TABLE_WINDOW)
options_default(global_w_options, oe);
}
libevent = osdep_event_init();
socket_path = xstrdup("dummy");
return 0;
}