stress2: Move test added by mistake

Reported by: markj

1 files changed, 289 insertions, 0 deletions

diff --git a/tools/test/stress2/misc/syzkaller45.sh b/tools/test/stress2/misc/syzkaller45.sh
new file mode 100755
index 000000000000..6c38b96ab12b
--- /dev/null
+++ b/tools/test/stress2/misc/syzkaller45.sh
@@ -0,0 +1,289 @@
+#!/bin/sh
+
+# panic: Assertion (cnp->cn_flags & (LOCKPARENT | WANTPARENT)) == 0 failed at ../../../kern/vfs_cache.c:4790
+# cpuid = 5
+# time = 1634453452
+# KDB: stack backtrace:
+# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0146912830
+# vpanic() at vpanic+0x187/frame 0xfffffe0146912890
+# panic() at panic+0x43/frame 0xfffffe01469128f0
+# cache_fplookup_emptypath() at cache_fplookup_emptypath+0x1b2/frame 0xfffffe0146912930
+# cache_fplookup_noentry() at cache_fplookup_noentry+0xbc/frame 0xfffffe01469129a0
+# cache_fplookup() at cache_fplookup+0x605/frame 0xfffffe0146912a90
+# namei() at namei+0x203/frame 0xfffffe0146912b50
+# vn_open_cred() at vn_open_cred+0x12c/frame 0xfffffe0146912cb0
+# kern_openat() at kern_openat+0x285/frame 0xfffffe0146912e00
+# amd64_syscall() at amd64_syscall+0x147/frame 0xfffffe0146912f30
+# fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe0146912f30
+# --- syscall (0, FreeBSD ELF64, nosys), rip = 0x8003aeafa, rsp = 0x7fffdfffdf28, rbp = 0x7fffdfffdf70 ---
+# KDB: enter: panic
+# [ thread pid 2864 tid 100315 ]
+# Stopped at      kdb_enter+0x37: movq    $0,0x126f74e(%rip)
+# db> x/s version
+# version: FreeBSD 14.0-CURRENT #0 main-n250087-a7d137fcbcac: Sun Oct 17 08:46:08 CEST 2021
+# pho@mercat1.netperf.freebsd.org:/usr/src/sys/amd64/compile/PHO\012
+# db> 
+
+# Fixed by 1045352f1503
+
+[ `uname -p` != "amd64" ] && exit 0
+[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
+
+. ../default.cfg
+cat > /tmp/syzkaller45.c <<EOF
+// https://syzkaller.appspot.com/bug?id=283995ae4346041c1757f62f3322a3545d0a62a4
+// autogenerated by syzkaller (https://github.com/google/syzkaller)
+// Reported-by: syzbot+bd48ee0843206a09e6b8@syzkaller.appspotmail.com
+
+#define _GNU_SOURCE
+
+#include <errno.h>
+#include <pthread.h>
+#include <pwd.h>
+#include <setjmp.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 <time.h>
+#include <unistd.h>
+
+static __thread int skip_segv;
+static __thread jmp_buf segv_env;
+
+static void segv_handler(int sig, siginfo_t* info, void* ctx __unused)
+{
+  uintptr_t addr = (uintptr_t)info->si_addr;
+  const uintptr_t prog_start = 1 << 20;
+  const uintptr_t prog_end = 100 << 20;
+  int skip = __atomic_load_n(&skip_segv, __ATOMIC_RELAXED) != 0;
+  int valid = addr < prog_start || addr > prog_end;
+  if (sig == SIGBUS)
+    valid = 1;
+  if (skip && valid) {
+    _longjmp(segv_env, 1);
+  }
+  exit(sig);
+}
+
+static void install_segv_handler(void)
+{
+  struct sigaction sa;
+  memset(&sa, 0, sizeof(sa));
+  sa.sa_sigaction = segv_handler;
+  sa.sa_flags = SA_NODEFER | SA_SIGINFO;
+  sigaction(SIGSEGV, &sa, NULL);
+  sigaction(SIGBUS, &sa, NULL);
+}
+
+#define NONFAILING(...)                                                        \
+  ({                                                                           \
+    int ok = 1;                                                                \
+    __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
+    if (_setjmp(segv_env) == 0) {                                              \
+      __VA_ARGS__;                                                             \
+    } else                                                                     \
+      ok = 0;                                                                  \
+    __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
+    ok;                                                                        \
+  })
+
+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 loop(void)
+{
+  int i, call, thread;
+  int collide = 0;
+again:
+  for (call = 0; call < 3; 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);
+      if (collide && (call % 2) == 0)
+        break;
+      event_timedwait(&th->done, 50);
+      break;
+    }
+  }
+  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
+    sleep_ms(1);
+  if (!collide) {
+    collide = 1;
+    goto again;
+  }
+}
+
+uint64_t r[1] = {0xffffffffffffffff};
+
+void execute_call(int call)
+{
+  intptr_t res = 0;
+  switch (call) {
+  case 0:
+    NONFAILING(memcpy((void*)0x20000480, "./file0\000", 8));
+    res = syscall(SYS_open, 0x20000480ul, 0x80400000000206ul, 0ul);
+    if (res != -1)
+      r[0] = res;
+    break;
+  case 1:
+    syscall(SYS_mmap, 0x20000000ul, 0x200000ul, 1ul, 0x12ul, r[0], 0ul);
+    break;
+  case 2:
+    syscall(SYS_ftruncate, r[0], 5ul);
+    break;
+  }
+}
+int main(void)
+{
+  syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
+  install_segv_handler();
+  loop();
+  return 0;
+}
+EOF
+mycc -o /tmp/syzkaller45 -Wall -Wextra -O0 /tmp/syzkaller45.c -lpthread || exit 1
+
+(cd /tmp; ./syzkaller45)
+
+rm -rf /tmp/syzkaller45 /tmp/syzkaller45.c /tmp/syzkaller.* /tmp/file0
+exit 0