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added read_timed

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This commit is contained in:
Dominik Maier
2020-03-30 00:50:04 +02:00
parent 3ce5efc44b
commit 452067ffca
7 changed files with 112 additions and 81 deletions
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23
src/afl-fuzz-run.c
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@ -33,13 +33,10 @@
u8 run_target(afl_state_t *afl, u32 timeout) {
s32 res;
int sret;
u32 time_ms;
fd_set readfds;
struct timeval it;
int status = 0;
u32 tb4;
int status = 0;
u32 tb4;
afl->fsrv.child_timed_out = 0;
@ -70,26 +67,20 @@ u8 run_target(afl_state_t *afl, u32 timeout) {
if (afl->fsrv.child_pid <= 0) FATAL("Fork server is misbehaving (OOM?)");
/* use select to monitor the forkserver for timeouts. */
time_ms = read_timed(afl->fsrv.fsrv_st_fd, &status, 4, timeout);
FD_ZERO(&readfds);
FD_SET(afl->fsrv.fsrv_st_fd, &readfds);
it.tv_sec = ((timeout) / 1000);
it.tv_usec = ((timeout) % 1000) * 1000;
sret = select(afl->fsrv.fsrv_st_fd + 1, &readfds, NULL, NULL, &it);
if (sret == 0) {
if (time_ms > timeout) {
/* If there was no response from forkserver after timeout seconds,
we kill the child. The forkserver should inform us afterwards */
kill(afl->fsrv.child_pid, SIGKILL);
afl->fsrv.child_timed_out = 1;
if (read(afl->fsrv.fsrv_st_fd, &status, 4) < 4) time_ms = 0;
}
if ((res = read(afl->fsrv.fsrv_st_fd, &status, 4)) != 4) {
if (!time_ms) {
if (afl->stop_soon) return 0;
SAYF("\n" cLRD "[-] " cRST