git: c86a43f1c7db - main - stress2: Added a syzkaller reproducer
Peter Holm
pho at FreeBSD.org
Mon Sep 6 13:32:51 UTC 2021
The branch main has been updated by pho:
URL: https://cgit.FreeBSD.org/src/commit/?id=c86a43f1c7dbaba4042db017a3c3563f5b826c48
commit c86a43f1c7dbaba4042db017a3c3563f5b826c48
Author: Peter Holm <pho at FreeBSD.org>
AuthorDate: 2021-09-06 13:32:23 +0000
Commit: Peter Holm <pho at FreeBSD.org>
CommitDate: 2021-09-06 13:32:23 +0000
stress2: Added a syzkaller reproducer
---
tools/test/stress2/misc/all.exclude | 1 +
tools/test/stress2/misc/syzkaller43.sh | 327 +++++++++++++++++++++++++++++++++
2 files changed, 328 insertions(+)
diff --git a/tools/test/stress2/misc/all.exclude b/tools/test/stress2/misc/all.exclude
index 9e9226c28574..d4a57af4d559 100644
--- a/tools/test/stress2/misc/all.exclude
+++ b/tools/test/stress2/misc/all.exclude
@@ -68,6 +68,7 @@ syzkaller39.sh WiP 20210607
syzkaller40.sh WiP 20210607
syzkaller41.sh WiP 20210607
syzkaller42.sh WiP 20210613
+syzkaller43.sh WiP 20210906
truss3.sh WiP 20200915
unionfs.sh insmntque: non-locked vp: xx is not exclusive locked... 20130909
unionfs2.sh insmntque: mp-safe fs and non-locked vp is not ... 20111219
diff --git a/tools/test/stress2/misc/syzkaller43.sh b/tools/test/stress2/misc/syzkaller43.sh
new file mode 100755
index 000000000000..025ee674132d
--- /dev/null
+++ b/tools/test/stress2/misc/syzkaller43.sh
@@ -0,0 +1,327 @@
+#!/bin/sh
+
+# panic: Assertion done != job_total_nbytes failed at ../../../kern/sys_socket.c:672
+# cpuid = 6
+# time = 1630912129
+# KDB: stack backtrace:
+# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00e4f2fa10
+# vpanic() at vpanic+0x187/frame 0xfffffe00e4f2fa70
+# panic() at panic+0x43/frame 0xfffffe00e4f2fad0
+# soaio_process_sb() at soaio_process_sb+0x79a/frame 0xfffffe00e4f2fb70
+# soaio_kproc_loop() at soaio_kproc_loop+0x96/frame 0xfffffe00e4f2fbb0
+# fork_exit() at fork_exit+0x80/frame 0xfffffe00e4f2fbf0
+# fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00e4f2fbf0
+# --- trap 0, rip = 0, rsp = 0, rbp = 0 ---
+# KDB: enter: panic
+# [ thread pid 26 tid 100163 ]
+# Stopped at kdb_enter+0x37: movq $0,0x127297e(%rip)
+# db> x/s version
+# version: FreeBSD 14.0-CURRENT #0 main-n249158-1f7a6325fe1b: Sun Sep 5 09:12:58 CEST 2021
+# pho at mercat1.netperf.freebsd.org:/usr/src/sys/amd64/compile/PHO
+# db>
+
+[ `uname -p` != "amd64" ] && exit 0
+[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
+
+. ../default.cfg
+cat > /tmp/syzkaller43.c <<EOF
+// https://syzkaller.appspot.com/bug?id=0ecbaedb9a54dd1af01c400dabe774e5c6c6fb6c
+// autogenerated by syzkaller (https://github.com/google/syzkaller)
+// Reported-by: syzbot+c7d22dbbb9aef509421d at syzkaller.appspotmail.com
+
+#define _GNU_SOURCE
+
+#include <sys/types.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/syscall.h>
+#include <sys/wait.h>
+#include <time.h>
+#include <unistd.h>
+
+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 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;
+}
+
+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 < 5; 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++) {
+ int pid = fork();
+ if (pid < 0)
+ exit(1);
+ if (pid == 0) {
+ 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;
+ }
+ }
+}
+
+#ifndef SYS_aio_readv
+#define SYS_aio_readv 579
+#endif
+
+uint64_t r[1] = {0xffffffffffffffff};
+
+void execute_call(int call)
+{
+ intptr_t res = 0;
+ switch (call) {
+ case 0:
+ res = syscall(SYS_socket, 0x1cul, 5ul, 0x84);
+ if (res != -1)
+ r[0] = res;
+ break;
+ case 1:
+ *(uint64_t*)0x20000440 = 0;
+ *(uint32_t*)0x20000448 = 0;
+ *(uint64_t*)0x20000450 = 0;
+ *(uint64_t*)0x20000458 = 0;
+ *(uint64_t*)0x20000460 = 0;
+ *(uint64_t*)0x20000468 = 0;
+ *(uint32_t*)0x20000470 = 0;
+ syscall(SYS_recvmsg, r[0], 0x20000440ul, 0x40040ul);
+ break;
+ case 2:
+ *(uint32_t*)0x200006c0 = r[0];
+ *(uint64_t*)0x200006c8 = 0x800;
+ *(uint64_t*)0x200006d0 = 0;
+ *(uint64_t*)0x200006d8 = 0;
+ *(uint32_t*)0x200006e0 = -1;
+ *(uint32_t*)0x200006e4 = 8;
+ *(uint64_t*)0x200006e8 = 0xffffffffffff658c;
+ *(uint32_t*)0x200006f0 = 4;
+ *(uint32_t*)0x200006f4 = 0x1ff;
+ *(uint64_t*)0x200006f8 = 0x40;
+ *(uint64_t*)0x20000700 = 0;
+ *(uint64_t*)0x20000708 = 0;
+ *(uint32_t*)0x20000710 = 4;
+ *(uint32_t*)0x20000714 = 8;
+ *(uint32_t*)0x20000718 = 6;
+ *(uint64_t*)0x20000720 = 0;
+ *(uint64_t*)0x20000728 = 0;
+ syscall(SYS_aio_readv, 0x200006c0ul);
+ break;
+ case 3:
+ *(uint32_t*)0x20000140 = 0;
+ *(uint16_t*)0x20000144 = 4;
+ *(uint8_t*)0x20000146 = 1;
+ syscall(SYS_setsockopt, r[0], 0x84, 0x1e, 0x20000140ul, 8ul);
+ break;
+ case 4:
+ *(uint64_t*)0x20000580 = 0x20000080;
+ *(uint8_t*)0x20000080 = 0x1c;
+ *(uint8_t*)0x20000081 = 0x1c;
+ *(uint16_t*)0x20000082 = htobe16(0x4e22);
+ *(uint32_t*)0x20000084 = 0;
+ *(uint64_t*)0x20000088 = htobe64(0);
+ *(uint64_t*)0x20000090 = htobe64(1);
+ *(uint32_t*)0x20000098 = 0;
+ *(uint32_t*)0x20000588 = 0x1c;
+ *(uint64_t*)0x20000590 = 0x20000400;
+ *(uint64_t*)0x20000400 = 0x200000c0;
+ memset((void*)0x200000c0, 239, 1);
+ *(uint64_t*)0x20000408 = 1;
+ *(uint32_t*)0x20000598 = 1;
+ *(uint64_t*)0x200005a0 = 0;
+ *(uint32_t*)0x200005a8 = 0xd0;
+ *(uint32_t*)0x200005ac = 0;
+ syscall(SYS_sendmsg, r[0], 0x20000580ul, 0ul);
+ break;
+ }
+}
+int main(void)
+{
+ syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
+ loop();
+ return 0;
+}
+EOF
+mycc -o /tmp/syzkaller43 -Wall -Wextra -O0 /tmp/syzkaller43.c -lpthread ||
+ exit 1
+
+(cd /tmp; timeout 3m ./syzkaller43)
+
+rm -rf /tmp/syzkaller43 syzkaller43.c /tmp/syzkaller.*
+exit 0
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