git: 4d0adee4e678 - main - stress2: Added procctl(2) PROC_REAP_KILL regression tests
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Date: Wed, 01 Jun 2022 08:04:08 UTC
The branch main has been updated by pho:
URL: https://cgit.FreeBSD.org/src/commit/?id=4d0adee4e678d1e1b973fd7cf0650950f609a44b
commit 4d0adee4e678d1e1b973fd7cf0650950f609a44b
Author: Peter Holm <pho@FreeBSD.org>
AuthorDate: 2022-06-01 07:58:28 +0000
Commit: Peter Holm <pho@FreeBSD.org>
CommitDate: 2022-06-01 07:58:28 +0000
stress2: Added procctl(2) PROC_REAP_KILL regression tests
---
tools/test/stress2/misc/reaper2.sh | 131 ++++++++++
tools/test/stress2/misc/reaper3.sh | 155 +++++++++++
tools/test/stress2/misc/reaper4.sh | 154 +++++++++++
tools/test/stress2/misc/reaper5.sh | 40 +++
tools/test/stress2/misc/syzkaller52.sh | 458 +++++++++++++++++++++++++++++++++
tools/test/stress2/misc/syzkaller53.sh | 172 +++++++++++++
6 files changed, 1110 insertions(+)
diff --git a/tools/test/stress2/misc/reaper2.sh b/tools/test/stress2/misc/reaper2.sh
new file mode 100755
index 000000000000..8290e38d34e4
--- /dev/null
+++ b/tools/test/stress2/misc/reaper2.sh
@@ -0,0 +1,131 @@
+#!/bin/sh
+
+#
+# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+#
+# Copyright (c) 2022 Peter Holm <pho@FreeBSD.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+
+# procctl(2) threaded test
+
+# panic: exiting process is stopped" seen:
+# https://people.freebsd.org/~pho/stress/log/log0285.txt
+
+prog=`basename ${0%.sh}`
+cat > /tmp/$prog.c <<EOF
+#include <sys/param.h>
+#include <sys/mman.h>
+#include <sys/procctl.h>
+
+#include <err.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+
+static volatile u_int *share;
+
+#define PARALLEL 25
+#define RUNTIME 120
+
+static void *
+tr(void *arg __unused)
+{
+ for (;;)
+ pause();
+
+ return (NULL);
+}
+
+static void
+test(void) {
+ pthread_t thr;
+ struct procctl_reaper_kill killemall;
+ pid_t pid;
+ time_t start;
+ int data[20], e, n, m;
+
+ n = m = 0;
+ if (procctl(P_PID, getpid(), PROC_REAP_ACQUIRE, NULL) == -1)
+ err(EXIT_FAILURE, "Fail to acquire the reaper");
+ start = time(NULL);
+ while (time(NULL) - start < RUNTIME) {
+ m++;
+ share[0] = 0;
+ if ((pid = fork()) == 0) {
+ e = pthread_create(&thr, NULL, tr, NULL);
+ if (e != 0)
+ errc(1, e, "pthread_create");
+ share[0] = 1;
+ setproctitle("child");
+ usleep(arc4random() % 200);
+ _exit(0);
+ }
+ arc4random_buf(data, sizeof(data));
+ while (share[0] == 0)
+ usleep(10);
+ killemall.rk_sig = SIGTERM;
+ killemall.rk_flags = 0;
+ if (procctl(P_PID, getpid(), PROC_REAP_KILL,
+ &killemall) == 0)
+ n++;
+ if (waitpid(pid, NULL, 0) != pid)
+ err(1, "waitpid()");
+ }
+#if defined(DEBUG)
+ fprintf(stderr, "n = %d out of %d\n", n, m);
+#endif
+ _exit(0);
+}
+
+int
+main(void) {
+ pid_t pids[PARALLEL];
+ size_t len;
+ int i;
+
+ len = PAGE_SIZE;
+ if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE,
+ MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED)
+ err(1, "mmap");
+ for (i = 0; i < PARALLEL; i++) {
+ if ((pids[i] = fork()) == 0)
+ test();
+ }
+ for (i = 0; i < PARALLEL; i++)
+ if (waitpid(pids[i], NULL, 0) != pids[i])
+ err(1, "waitpid()");
+}
+EOF
+cc -o /tmp/$prog -Wall -Wextra -O0 /tmp/$prog.c -lpthread || exit 1
+rm /tmp/$prog.c
+
+here=`pwd`
+cd /tmp
+./$prog; s=$?
+cd $here
+
+rm /tmp/$prog
+exit $s
diff --git a/tools/test/stress2/misc/reaper3.sh b/tools/test/stress2/misc/reaper3.sh
new file mode 100755
index 000000000000..fdf715fa7b0b
--- /dev/null
+++ b/tools/test/stress2/misc/reaper3.sh
@@ -0,0 +1,155 @@
+#!/bin/sh
+
+#
+# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+#
+# Copyright (c) 2022 Peter Holm <pho@FreeBSD.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+
+# procctl(2) fuzz test
+
+prog=`basename ${0%.sh}`
+cat > /tmp/$prog.c <<EOF
+#include <sys/param.h>
+#include <sys/mman.h>
+#include <sys/procctl.h>
+
+#include <err.h>
+#include <pthread.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+
+static volatile u_int *share;
+
+#define PARALLEL 25
+#define RUNTIME 120
+
+static long
+random_long(long mi, long ma)
+{
+ return (arc4random() % (ma - mi + 1) + mi);
+}
+
+static void
+flip(void *ap, size_t len)
+{
+ unsigned char *cp;
+ int byte;
+ unsigned char bit, buf, mask, old __unused;
+
+ cp = (unsigned char *)ap;
+ byte = random_long(0, len);
+ bit = random_long(0,7);
+ mask = ~(1 << bit);
+ buf = cp[byte];
+ old = cp[byte];
+ buf = (buf & mask) | (~buf & ~mask);
+ cp[byte] = buf;
+}
+
+static void *
+tr(void *arg __unused)
+{
+ for (;;)
+ pause();
+
+ return (NULL);
+}
+
+static void
+test(void) {
+ pthread_t thr;
+ struct procctl_reaper_kill killemall;
+ pid_t pid;
+ time_t start;
+ int data[20], e, n, m;
+
+ n = m = 0;
+ if (procctl(P_PID, getpid(), PROC_REAP_ACQUIRE, NULL) == -1)
+ err(EXIT_FAILURE, "Fail to acquire the reaper");
+ start = time(NULL);
+ while (time(NULL) - start < RUNTIME) {
+ m++;
+ share[0] = 0;
+ if ((pid = fork()) == 0) {
+ e = pthread_create(&thr, NULL, tr, NULL);
+ if (e != 0)
+ errc(1, e, "pthread_create");
+ share[0] = 1;
+ setproctitle("child");
+ usleep(arc4random() % 200);
+ if (arc4random() % 100 < 2)
+ raise(SIGSEGV);
+ _exit(0);
+ }
+ arc4random_buf(data, sizeof(data));
+ while (share[0] == 0)
+ usleep(10);
+ killemall.rk_sig = SIGTERM;
+ killemall.rk_flags = 0;
+ flip(&killemall, sizeof(killemall));
+ if (procctl(P_PID, getpid(), PROC_REAP_KILL,
+ &killemall) == 0)
+ n++;
+ if (waitpid(pid, NULL, 0) != pid)
+ err(1, "waitpid()");
+ }
+#if defined(DEBUG)
+ fprintf(stderr, "n = %d out of %d\n", n, m);
+#endif
+ _exit(0);
+}
+
+int
+main(void) {
+ pid_t pids[PARALLEL];
+ size_t len;
+ int i;
+
+ len = PAGE_SIZE;
+ if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE,
+ MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED)
+ err(1, "mmap");
+ for (i = 0; i < PARALLEL; i++) {
+ if ((pids[i] = fork()) == 0)
+ test();
+ }
+ for (i = 0; i < PARALLEL; i++)
+ if (waitpid(pids[i], NULL, 0) != pids[i])
+ err(1, "waitpid()");
+}
+EOF
+cc -o /tmp/$prog -Wall -Wextra -O0 /tmp/$prog.c -lpthread || exit 1
+rm /tmp/$prog.c
+
+here=`pwd`
+cd /tmp
+./$prog; s=$?
+cd $here
+
+rm -f /tmp/$prog /tmp/$prog.core
+exit $s
diff --git a/tools/test/stress2/misc/reaper4.sh b/tools/test/stress2/misc/reaper4.sh
new file mode 100755
index 000000000000..bf400e396e63
--- /dev/null
+++ b/tools/test/stress2/misc/reaper4.sh
@@ -0,0 +1,154 @@
+#!/bin/sh
+
+#
+# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+#
+# Copyright (c) 2022 Peter Holm <pho@FreeBSD.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+
+# procctl(2) fuzz test
+
+prog=`basename ${0%.sh}`
+cat > /tmp/$prog.c <<EOF
+#include <sys/param.h>
+#include <sys/mman.h>
+#include <sys/procctl.h>
+
+#include <err.h>
+#include <pthread.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+
+static volatile u_int *share;
+
+#define PARALLEL 25
+#define RUNTIME 120
+
+static long
+random_long(long mi, long ma)
+{
+ return (arc4random() % (ma - mi + 1) + mi);
+}
+
+static void
+flip(void *ap, size_t len)
+{
+ unsigned char *cp;
+ int byte;
+ unsigned char bit, buf, mask, old __unused;
+
+ cp = (unsigned char *)ap;
+ byte = random_long(0, len);
+ bit = random_long(0,7);
+ mask = ~(1 << bit);
+ buf = cp[byte];
+ old = cp[byte];
+ buf = (buf & mask) | (~buf & ~mask);
+ cp[byte] = buf;
+}
+
+static void *
+tr(void *arg __unused)
+{
+ usleep(arc4random() % 400);
+
+ return (NULL);
+}
+
+static void
+test(void) {
+ pthread_t thr;
+ struct procctl_reaper_kill killemall;
+ pid_t pid;
+ time_t start;
+ int data[20], e, n, m;
+
+ n = m = 0;
+ if (procctl(P_PID, getpid(), PROC_REAP_ACQUIRE, NULL) == -1)
+ err(EXIT_FAILURE, "Fail to acquire the reaper");
+ start = time(NULL);
+ while (time(NULL) - start < RUNTIME) {
+ m++;
+ share[0] = 0;
+ if ((pid = fork()) == 0) {
+ e = pthread_create(&thr, NULL, tr, NULL);
+ if (e != 0)
+ errc(1, e, "pthread_create");
+ share[0] = 1;
+ setproctitle("child");
+ usleep(arc4random() % 200);
+ if (arc4random() % 100 < 2)
+ raise(SIGSEGV);
+ _exit(0);
+ }
+ arc4random_buf(data, sizeof(data));
+ while (share[0] == 0)
+ usleep(10);
+ killemall.rk_sig = SIGTERM;
+ killemall.rk_flags = 0;
+ flip(&killemall, sizeof(killemall));
+ if (procctl(P_PID, getpid(), PROC_REAP_KILL,
+ &killemall) == 0)
+ n++;
+ if (waitpid(pid, NULL, 0) != pid)
+ err(1, "waitpid()");
+ }
+#if defined(DEBUG)
+ fprintf(stderr, "n = %d out of %d\n", n, m);
+#endif
+ _exit(0);
+}
+
+int
+main(void) {
+ pid_t pids[PARALLEL];
+ size_t len;
+ int i;
+
+ len = PAGE_SIZE;
+ if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE,
+ MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED)
+ err(1, "mmap");
+ for (i = 0; i < PARALLEL; i++) {
+ if ((pids[i] = fork()) == 0)
+ test();
+ }
+ for (i = 0; i < PARALLEL; i++)
+ if (waitpid(pids[i], NULL, 0) != pids[i])
+ err(1, "waitpid()");
+}
+EOF
+cc -o /tmp/$prog -Wall -Wextra -O0 /tmp/$prog.c -lpthread || exit 1
+rm /tmp/$prog.c
+
+here=`pwd`
+cd /tmp
+./$prog; s=$?
+cd $here
+
+rm -f /tmp/$prog /tmp/$prog.core
+exit $s
diff --git a/tools/test/stress2/misc/reaper5.sh b/tools/test/stress2/misc/reaper5.sh
new file mode 100755
index 000000000000..eec58c36713a
--- /dev/null
+++ b/tools/test/stress2/misc/reaper5.sh
@@ -0,0 +1,40 @@
+#!/bin/sh
+
+#
+# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+#
+# Copyright (c) 2022 Peter Holm <pho@FreeBSD.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+
+# "panic: Assertion (t->parent->p_treeflag & P_TREE_REAPER) != 0 failed at
+# ../../../kern/kern_procctl.c:373" seen in WiP kernel code
+
+start=`date +%s`
+while [ $((`date +%s` - start)) -lt 120 ]; do
+ for i in `jot 100`; do
+ timeout 2s sh -c "timeout 2s sleep 60" &
+ done
+ wait
+done
+exit 0
diff --git a/tools/test/stress2/misc/syzkaller52.sh b/tools/test/stress2/misc/syzkaller52.sh
new file mode 100755
index 000000000000..ec5244bdae65
--- /dev/null
+++ b/tools/test/stress2/misc/syzkaller52.sh
@@ -0,0 +1,458 @@
+#!/bin/sh
+
+# panic: already suspended
+# cpuid = 6
+# time = 1651176216
+# KDB: stack backtrace:
+# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe014194ea70
+# vpanic() at vpanic+0x17f/frame 0xfffffe014194eac0
+# panic() at panic+0x43/frame 0xfffffe014194eb20
+# thread_single() at thread_single+0x774/frame 0xfffffe014194eb90
+# reap_kill_proc() at reap_kill_proc+0x296/frame 0xfffffe014194ebf0
+# reap_kill() at reap_kill+0x371/frame 0xfffffe014194ed00
+# kern_procctl() at kern_procctl+0x30b/frame 0xfffffe014194ed70
+# sys_procctl() at sys_procctl+0x11e/frame 0xfffffe014194ee00
+# amd64_syscall() at amd64_syscall+0x145/frame 0xfffffe014194ef30
+# fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe014194ef30
+# --- syscall (0, FreeBSD ELF64, nosys), rip = 0x8226f27aa, rsp = 0x82803ef48, rbp = 0x82803ef70 ---
+# KDB: enter: panic
+# [ thread pid 3074 tid 100404 ]
+# Stopped at kdb_enter+0x32: movq $0,0x12790b3(%rip)
+# db> x/s version
+# FreeBSD 14.0-CURRENT #0 main-n255099-0923ff82fb383: Thu Apr 28 09:48:48 CEST 2022
+# pho@mercat1.netperf.freebsd.org:/usr/src/sys/amd64/compile/PHO
+# db>
+
+[ `uname -p` != "amd64" ] && exit 0
+
+. ../default.cfg
+cat > /tmp/syzkaller52.c <<EOF
+// https://syzkaller.appspot.com/bug?id=20185b6047d7371885412b56ff188be88f740eab
+// autogenerated by syzkaller (https://github.com/google/syzkaller)
+// Reported-by: syzbot+79cd12371d417441b175@syzkaller.appspotmail.com
+
+#define _GNU_SOURCE
+
+#include <sys/types.h>
+
+#include <dirent.h>
+#include <errno.h>
+#include <pthread.h>
+#include <pwd.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/endian.h>
+#include <sys/resource.h>
+#include <sys/stat.h>
+#include <sys/syscall.h>
+#include <sys/wait.h>
+#include <time.h>
+#include <unistd.h>
+
+static unsigned long long procid;
+
+static void kill_and_wait(int pid, int* status)
+{
+ kill(pid, SIGKILL);
+ while (waitpid(-1, status, 0) != pid) {
+ }
+}
+
+static void sleep_ms(uint64_t ms)
+{
+ usleep(ms * 1000);
+}
+
+static uint64_t current_time_ms(void)
+{
+ struct timespec ts;
+ if (clock_gettime(CLOCK_MONOTONIC, &ts))
+ exit(1);
+ return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
+}
+
+static void use_temporary_dir(void)
+{
+ char tmpdir_template[] = "./syzkaller.XXXXXX";
+ char* tmpdir = mkdtemp(tmpdir_template);
+ if (!tmpdir)
+ exit(1);
+ if (chmod(tmpdir, 0777))
+ exit(1);
+ if (chdir(tmpdir))
+ exit(1);
+}
+
+static void __attribute__((noinline)) remove_dir(const char* dir)
+{
+ DIR* dp = opendir(dir);
+ if (dp == NULL) {
+ if (errno == EACCES) {
+ if (rmdir(dir))
+ exit(1);
+ return;
+ }
+ exit(1);
+ }
+ struct dirent* ep = 0;
+ while ((ep = readdir(dp))) {
+ if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0)
+ continue;
+ char filename[FILENAME_MAX];
+ snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name);
+ struct stat st;
+ if (lstat(filename, &st))
+ exit(1);
+ if (S_ISDIR(st.st_mode)) {
+ remove_dir(filename);
+ continue;
+ }
+ if (unlink(filename))
+ exit(1);
+ }
+ closedir(dp);
+ if (rmdir(dir))
+ exit(1);
+}
+
+static void thread_start(void* (*fn)(void*), void* arg)
+{
+ pthread_t th;
+ pthread_attr_t attr;
+ pthread_attr_init(&attr);
+ pthread_attr_setstacksize(&attr, 128 << 10);
+ int i = 0;
+ for (; i < 100; i++) {
+ if (pthread_create(&th, &attr, fn, arg) == 0) {
+ pthread_attr_destroy(&attr);
+ return;
+ }
+ if (errno == EAGAIN) {
+ usleep(50);
+ continue;
+ }
+ break;
+ }
+ exit(1);
+}
+
+typedef struct {
+ pthread_mutex_t mu;
+ pthread_cond_t cv;
+ int state;
+} event_t;
+
+static void event_init(event_t* ev)
+{
+ if (pthread_mutex_init(&ev->mu, 0))
+ exit(1);
+ if (pthread_cond_init(&ev->cv, 0))
+ exit(1);
+ ev->state = 0;
+}
+
+static void event_reset(event_t* ev)
+{
+ ev->state = 0;
+}
+
+static void event_set(event_t* ev)
+{
+ pthread_mutex_lock(&ev->mu);
+ if (ev->state)
+ exit(1);
+ ev->state = 1;
+ pthread_mutex_unlock(&ev->mu);
+ pthread_cond_broadcast(&ev->cv);
+}
+
+static void event_wait(event_t* ev)
+{
+ pthread_mutex_lock(&ev->mu);
+ while (!ev->state)
+ pthread_cond_wait(&ev->cv, &ev->mu);
+ pthread_mutex_unlock(&ev->mu);
+}
+
+static int event_isset(event_t* ev)
+{
+ pthread_mutex_lock(&ev->mu);
+ int res = ev->state;
+ pthread_mutex_unlock(&ev->mu);
+ return res;
+}
+
+static int event_timedwait(event_t* ev, uint64_t timeout)
+{
+ uint64_t start = current_time_ms();
+ uint64_t now = start;
+ pthread_mutex_lock(&ev->mu);
+ for (;;) {
+ if (ev->state)
+ break;
+ uint64_t remain = timeout - (now - start);
+ struct timespec ts;
+ ts.tv_sec = remain / 1000;
+ ts.tv_nsec = (remain % 1000) * 1000 * 1000;
+ pthread_cond_timedwait(&ev->cv, &ev->mu, &ts);
+ now = current_time_ms();
+ if (now - start > timeout)
+ break;
+ }
+ int res = ev->state;
+ pthread_mutex_unlock(&ev->mu);
+ return res;
+}
+
+static void sandbox_common()
+{
+ struct rlimit rlim;
+ rlim.rlim_cur = rlim.rlim_max = 128 << 20;
+ setrlimit(RLIMIT_AS, &rlim);
+ rlim.rlim_cur = rlim.rlim_max = 8 << 20;
+ setrlimit(RLIMIT_MEMLOCK, &rlim);
+ rlim.rlim_cur = rlim.rlim_max = 1 << 20;
+ setrlimit(RLIMIT_FSIZE, &rlim);
+ rlim.rlim_cur = rlim.rlim_max = 1 << 20;
+ setrlimit(RLIMIT_STACK, &rlim);
+ rlim.rlim_cur = rlim.rlim_max = 0;
+ setrlimit(RLIMIT_CORE, &rlim);
+ rlim.rlim_cur = rlim.rlim_max = 256;
+ setrlimit(RLIMIT_NOFILE, &rlim);
+}
+
+static void loop();
+
+static int do_sandbox_none(void)
+{
+ sandbox_common();
+ loop();
+ return 0;
+}
+
+struct thread_t {
+ int created, call;
+ event_t ready, done;
+};
+
+static struct thread_t threads[16];
+static void execute_call(int call);
+static int running;
+
+static void* thr(void* arg)
+{
+ struct thread_t* th = (struct thread_t*)arg;
+ for (;;) {
+ event_wait(&th->ready);
+ event_reset(&th->ready);
+ execute_call(th->call);
+ __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
+ event_set(&th->done);
+ }
+ return 0;
+}
+
+static void execute_one(void)
+{
+ int i, call, thread;
+ for (call = 0; call < 14; call++) {
+ for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0]));
+ thread++) {
+ struct thread_t* th = &threads[thread];
+ if (!th->created) {
+ th->created = 1;
+ event_init(&th->ready);
+ event_init(&th->done);
+ event_set(&th->done);
+ thread_start(thr, th);
+ }
+ if (!event_isset(&th->done))
+ continue;
+ event_reset(&th->done);
+ th->call = call;
+ __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
+ event_set(&th->ready);
+ event_timedwait(&th->done, 50);
+ break;
+ }
+ }
+ for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
+ sleep_ms(1);
+}
+
+static void execute_one(void);
+
+#define WAIT_FLAGS 0
+
+static void loop(void)
+{
+ int iter = 0;
+ for (;; iter++) {
+ char cwdbuf[32];
+ sprintf(cwdbuf, "./%d", iter);
+ if (mkdir(cwdbuf, 0777))
+ exit(1);
+ int pid = fork();
+ if (pid < 0)
+ exit(1);
+ if (pid == 0) {
+ if (chdir(cwdbuf))
+ exit(1);
+ execute_one();
+ exit(0);
+ }
+ int status = 0;
+ uint64_t start = current_time_ms();
+ for (;;) {
+ if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
+ break;
+ sleep_ms(1);
+ if (current_time_ms() - start < 5000)
+ continue;
+ kill_and_wait(pid, &status);
+ break;
+ }
+ remove_dir(cwdbuf);
+ }
+}
+
+uint64_t r[4] = {0x0, 0x0, 0x0, 0x0};
+
+void execute_call(int call)
+{
+ intptr_t res = 0;
+ switch (call) {
+ case 0:
+ *(uint32_t*)0x20000000 = 0x3f;
+ *(uint32_t*)0x20000004 = 8;
+ *(uint32_t*)0x20000008 = 0x1000;
+ *(uint32_t*)0x2000000c = 7;
+ syscall(SYS_sigsuspend, 0x20000000ul);
+ break;
+ case 1:
+ syscall(SYS_setgid, 0);
+ break;
+ case 2:
+ syscall(SYS_getgroups, 0ul, 0ul);
+ break;
+ case 3:
+ syscall(SYS_setegid, 0);
+ break;
+ case 4:
+ res = syscall(SYS_shmget, 0ul, 0x2000ul, 0x420ul, 0x20ffd000ul);
+ if (res != -1)
+ r[0] = res;
+ break;
+ case 5:
+ res = syscall(SYS_getpid);
+ if (res != -1)
+ r[1] = res;
+ break;
+ case 6:
+ *(uint32_t*)0x20000200 = -1;
+ *(uint32_t*)0x20000204 = 0;
+ *(uint32_t*)0x20000208 = -1;
+ *(uint32_t*)0x2000020c = 0;
+ *(uint16_t*)0x20000210 = 0xf965;
+ *(uint16_t*)0x20000212 = 0x2000;
+ *(uint32_t*)0x20000214 = 0;
+ *(uint64_t*)0x20000218 = 0x2d;
+ *(uint32_t*)0x20000220 = 0x1f;
+ *(uint64_t*)0x20000228 = 2;
+ *(uint64_t*)0x20000230 = 4;
+ *(uint64_t*)0x20000238 = 0;
+ *(uint32_t*)0x20000240 = r[1];
+ *(uint32_t*)0x20000244 = -1;
+ *(uint16_t*)0x20000248 = 7;
+ *(uint16_t*)0x2000024a = 0;
+ *(uint64_t*)0x20000250 = 0;
+ *(uint64_t*)0x20000258 = 0;
+ syscall(SYS_shmctl, r[0], 1ul, 0x20000200ul);
+ break;
+ case 7:
+ syscall(SYS_getgid);
+ break;
+ case 8:
+ syscall(SYS___semctl, 0, 0ul, 1ul, 0ul);
+ break;
+ case 9:
+ *(uint32_t*)0x20000300 = 4;
+ *(uint32_t*)0x20000304 = 0;
+ *(uint16_t*)0x20000308 = 7;
+ *(uint16_t*)0x2000030a = 6;
+ memcpy((void*)0x2000030c,
+ "\x26\xb9\x52\x60\x70\xe1\xb8\x97\x99\x4b\x39\xd3\xea\x42\xe7\xed",
+ 16);
+ syscall(SYS_fhstat, 0x20000300ul, 0ul);
+ break;
+ case 10:
+ res = syscall(SYS_getgid);
+ if (res != -1)
+ r[2] = res;
+ break;
+ case 11:
+ *(uint32_t*)0x20000440 = 3;
+ *(uint32_t*)0x20000444 = 0;
+ *(uint32_t*)0x20000448 = r[1];
+ *(uint32_t*)0x2000044c = 0x81;
+ *(uint32_t*)0x20000450 = r[1];
+ memset((void*)0x20000454, 0, 60);
+ res = syscall(SYS_procctl, 0ul, r[1], 6ul, 0x20000440ul);
+ if (res != -1)
+ r[3] = *(uint32_t*)0x20000450;
+ break;
+ case 12:
+ *(uint32_t*)0x200004c0 = 0;
+ *(uint32_t*)0x200004c4 = 0;
+ *(uint32_t*)0x200004c8 = 0;
+ *(uint32_t*)0x200004cc = r[2];
+ *(uint16_t*)0x200004d0 = 0x100;
+ *(uint16_t*)0x200004d2 = 8;
+ *(uint32_t*)0x200004d4 = 0;
+ *(uint64_t*)0x200004d8 = 0x7ff;
+ *(uint64_t*)0x200004e0 = 0x7f;
+ *(uint64_t*)0x200004e8 = 0x81;
+ *(uint64_t*)0x200004f0 = 0xfff;
+ *(uint64_t*)0x200004f8 = 0x3a;
+ *(uint64_t*)0x20000500 = 0x100000000;
+ *(uint64_t*)0x20000508 = 9;
+ *(uint32_t*)0x20000510 = r[1];
+ *(uint32_t*)0x20000514 = r[3];
+ *(uint64_t*)0x20000518 = 0;
+ *(uint64_t*)0x20000520 = 0;
+ syscall(SYS_msgctl, -1, 1ul, 0x200004c0ul);
+ break;
+ case 13:
+ syscall(SYS_ioctl, -1, 0xc0f24425ul, 0ul);
+ break;
+ }
+}
+int main(void)
+{
+ syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
+ for (procid = 0; procid < 4; procid++) {
+ if (fork() == 0) {
+ use_temporary_dir();
+ do_sandbox_none();
+ }
+ }
+ sleep(1000000);
+ return 0;
+}
+EOF
+mycc -o /tmp/syzkaller52 -Wall -Wextra -O0 /tmp/syzkaller52.c -l pthread ||
+ exit 1
+
+start=`date +%s`
+while [ $((`date +%s` - start)) -lt 120 ]; do
+ (cd /tmp; timeout 3m ./syzkaller52)
+done
+
+rm -rf /tmp/syzkaller52 /tmp/syzkaller52.c /tmp/syzkaller52.core \
+ /tmp/syzkaller.??????
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