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This commit is contained in:
van Hauser 2020-06-01 12:30:55 +02:00
parent bca7ce8043
commit 0de25f08ba
4 changed files with 43 additions and 23 deletions
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9
examples/persistent_demo/test-instr.c
View File

@ -25,7 +25,7 @@ int main(int argc, char **argv) {
__AFL_INIT();
unsigned char *buf = __AFL_FUZZ_TESTCASE_BUF;
while(__AFL_LOOP(2147483647)) {
while (__AFL_LOOP(2147483647)) {
unsigned int len = __AFL_FUZZ_TESTCASE_LEN;
@ -35,12 +35,18 @@ int main(int argc, char **argv) {
sprintf(fn, "%09u:test-instr", counter);
int fd_doc = open(fn, O_WRONLY | O_CREAT | O_TRUNC, 0600);
if (fd_doc >= 0) {
if (write(fd_doc, __afl_fuzz_ptr, __afl_fuzz_len) != __afl_fuzz_len) {
fprintf(stderr, "write of mutation file failed: %s\n", fn);
unlink(fn);
}
close(fd_doc);
}
counter++;
#endif
@ -52,6 +58,7 @@ int main(int argc, char **argv) {
printf("Pretty sure that is a one!\n");
else
printf("Neither one or zero? How quaint!\n");
}
return 0;

31
llvm_mode/afl-llvm-rt.o.c
View File

@ -74,9 +74,9 @@ u8 __afl_area_initial[MAP_INITIAL_SIZE];
#else
u8 __afl_area_initial[MAP_SIZE];
#endif
u8 *__afl_area_ptr = __afl_area_initial;
u8 *__afl_dictionary;
u8 *__afl_fuzz_ptr;
u8 * __afl_area_ptr = __afl_area_initial;
u8 * __afl_dictionary;
u8 * __afl_fuzz_ptr;
u32 __afl_fuzz_len;
u32 __afl_fuzz_len_dummy;
u32 *__afl_fuzz_len_shmem = &__afl_fuzz_len_dummy;
@ -166,7 +166,8 @@ static void __afl_map_shm_fuzz() {
}
__afl_fuzz_len_shmem = (u32*) mmap(NULL, sizeof(int), PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, -1, 0);
__afl_fuzz_len_shmem = (u32 *)mmap(NULL, sizeof(int), PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_ANONYMOUS, -1, 0);
}
@ -450,22 +451,31 @@ static void __afl_start_snapshots(void) {
*__afl_fuzz_len_shmem = __afl_fuzz_len = (was_killed >> 8);
was_killed = (was_killed & 0xff);
#ifdef _AFL_DOCUMENT_MUTATIONS
#ifdef _AFL_DOCUMENT_MUTATIONS
if (__afl_fuzz_ptr) {
static uint32_t counter = 0;
char fn[32];
sprintf(fn, "%09u:forkserver", counter);
s32 fd_doc = open(fn, O_WRONLY | O_CREAT | O_TRUNC, 0600);
if (fd_doc >= 0) {
if (write(fd_doc, __afl_fuzz_ptr, __afl_fuzz_len) != __afl_fuzz_len) {
fprintf(stderr, "write of mutation file failed: %s\n", fn);
unlink(fn);
}
close(fd_doc);
}
counter++;
}
#endif
#endif
/* If we stopped the child in persistent mode, but there was a race
condition and afl-fuzz already issued SIGKILL, write off the old
@ -646,19 +656,28 @@ static void __afl_start_forkserver(void) {
#ifdef _AFL_DOCUMENT_MUTATIONS
if (__afl_fuzz_ptr) {
static uint32_t counter = 0;
char fn[32];
sprintf(fn, "%09u:forkserver", counter);
s32 fd_doc = open(fn, O_WRONLY | O_CREAT | O_TRUNC, 0600);
if (fd_doc >= 0) {
if (write(fd_doc, __afl_fuzz_ptr, __afl_fuzz_len) != __afl_fuzz_len) {
fprintf(stderr, "write of mutation file failed: %s\n", fn);
unlink(fn);
}
close(fd_doc);
}
counter++;
}
#endif
/* If we stopped the child in persistent mode, but there was a race

2
src/afl-fuzz-init.c
View File

@ -1949,7 +1949,6 @@ static void handle_skipreq(int sig) {
}
/* Setup shared map for fuzzing with input via sharedmem */
void setup_testcase_shmem(afl_state_t *afl) {
@ -1978,7 +1977,6 @@ void setup_testcase_shmem(afl_state_t *afl) {
}
/* Do a PATH search and find target binary to see that it exists and
isn't a shell script - a common and painful mistake. We also check for
a valid ELF header and for evidence of AFL instrumentation. */

6
src/afl-fuzz.c
View File

@ -1179,11 +1179,7 @@ int main(int argc, char **argv_orig, char **envp) {
check_binary(afl, argv[optind]);
if (afl->shmem_testcase_mode) {
setup_testcase_shmem(afl);
}
if (afl->shmem_testcase_mode) { setup_testcase_shmem(afl); }
afl->start_time = get_cur_time();