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child cleanup

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This commit is contained in:
van Hauser
2020-09-01 13:42:33 +02:00
parent 75c38d6243
commit e4a86b40a5
1 changed files with 17 additions and 3 deletions
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20
src/afl-forkserver.c
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@ -240,6 +240,17 @@ static void afl_fauxsrv_execv(afl_forkserver_t *fsrv, char **argv) {
if (!child_pid) { // New child if (!child_pid) { // New child
close(fsrv->out_dir_fd);
close(fsrv->dev_null_fd);
close(fsrv->dev_urandom_fd);
if (fsrv->plot_file != NULL) {
fclose(fsrv->plot_file);
fsrv->plot_file = NULL;
}
signal(SIGCHLD, old_sigchld_handler); signal(SIGCHLD, old_sigchld_handler);
// FORKSRV_FD is for communication with AFL, we don't need it in the // FORKSRV_FD is for communication with AFL, we don't need it in the
// child. // child.
@ -360,12 +371,10 @@ void afl_fsrv_start(afl_forkserver_t *fsrv, char **argv,
if (!fsrv->fsrv_pid) { if (!fsrv->fsrv_pid) {
/* CHILD PROCESS */ /* CHILD PROCESS */
struct rlimit r; struct rlimit r;
/* Umpf. On OpenBSD, the default fd limit for root users is set to /* Umpf. On OpenBSD, the default fd limit for root users is set to
soft 128. Let's try to fix that... */ soft 128. Let's try to fix that... */
if (!getrlimit(RLIMIT_NOFILE, &r) && r.rlim_cur < FORKSRV_FD + 2) { if (!getrlimit(RLIMIT_NOFILE, &r) && r.rlim_cur < FORKSRV_FD + 2) {
r.rlim_cur = FORKSRV_FD + 2; r.rlim_cur = FORKSRV_FD + 2;
@ -432,7 +441,12 @@ void afl_fsrv_start(afl_forkserver_t *fsrv, char **argv,
close(fsrv->dev_null_fd); close(fsrv->dev_null_fd);
close(fsrv->dev_urandom_fd); close(fsrv->dev_urandom_fd);
if (fsrv->plot_file != NULL) { fclose(fsrv->plot_file); } if (fsrv->plot_file != NULL) {
fclose(fsrv->plot_file);
fsrv->plot_file = NULL;
}
/* This should improve performance a bit, since it stops the linker from /* This should improve performance a bit, since it stops the linker from
doing extra work post-fork(). */ doing extra work post-fork(). */