// https://syzkaller.appspot.com/bug?id=28252662dd9dc5bc58d7fb236ed75522fd699ba9
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

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 bool write_file(const char* file, const char* what, ...)
{
  char buf[1024];
  va_list args;
  va_start(args, what);
  vsnprintf(buf, sizeof(buf), what, args);
  va_end(args);
  buf[sizeof(buf) - 1] = 0;
  int len = strlen(buf);
  int fd = open(file, O_WRONLY | O_CLOEXEC);
  if (fd == -1)
    return false;
  if (write(fd, buf, len) != len) {
    int err = errno;
    close(fd);
    errno = err;
    return false;
  }
  close(fd);
  return true;
}

static long syz_open_dev(volatile long a0, volatile long a1, volatile long a2)
{
  if (a0 == 0xc || a0 == 0xb) {
    char buf[128];
    sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block", (uint8_t)a1,
            (uint8_t)a2);
    return open(buf, O_RDWR, 0);
  } else {
    unsigned long nb = a1;
    char buf[1024];
    char* hash;
    strncpy(buf, (char*)a0, sizeof(buf) - 1);
    buf[sizeof(buf) - 1] = 0;
    while ((hash = strchr(buf, '#'))) {
      *hash = '0' + (char)(nb % 10);
      nb /= 10;
    }
    return open(buf, a2 & ~O_CREAT, 0);
  }
}

static int inject_fault(int nth)
{
  int fd;
  fd = open("/proc/thread-self/fail-nth", O_RDWR);
  if (fd == -1)
    exit(1);
  char buf[16];
  sprintf(buf, "%d", nth);
  if (write(fd, buf, strlen(buf)) != (ssize_t)strlen(buf))
    exit(1);
  return fd;
}

static void kill_and_wait(int pid, int* status)
{
  kill(-pid, SIGKILL);
  kill(pid, SIGKILL);
  for (int i = 0; i < 100; i++) {
    if (waitpid(-1, status, WNOHANG | __WALL) == pid)
      return;
    usleep(1000);
  }
  DIR* dir = opendir("/sys/fs/fuse/connections");
  if (dir) {
    for (;;) {
      struct dirent* ent = readdir(dir);
      if (!ent)
        break;
      if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0)
        continue;
      char abort[300];
      snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort",
               ent->d_name);
      int fd = open(abort, O_WRONLY);
      if (fd == -1) {
        continue;
      }
      if (write(fd, abort, 1) < 0) {
      }
      close(fd);
    }
    closedir(dir);
  } else {
  }
  while (waitpid(-1, status, __WALL) != pid) {
  }
}

static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  write_file("/proc/self/oom_score_adj", "1000");
}

static const char* setup_fault()
{
  int fd = open("/proc/self/make-it-fail", O_WRONLY);
  if (fd == -1)
    return "CONFIG_FAULT_INJECTION is not enabled";
  close(fd);
  fd = open("/proc/thread-self/fail-nth", O_WRONLY);
  if (fd == -1)
    return "kernel does not have systematic fault injection support";
  close(fd);
  static struct {
    const char* file;
    const char* val;
    bool fatal;
  } files[] = {
      {"/sys/kernel/debug/failslab/ignore-gfp-wait", "N", true},
      {"/sys/kernel/debug/fail_futex/ignore-private", "N", false},
      {"/sys/kernel/debug/fail_page_alloc/ignore-gfp-highmem", "N", false},
      {"/sys/kernel/debug/fail_page_alloc/ignore-gfp-wait", "N", false},
      {"/sys/kernel/debug/fail_page_alloc/min-order", "0", false},
  };
  unsigned i;
  for (i = 0; i < sizeof(files) / sizeof(files[0]); i++) {
    if (!write_file(files[i].file, files[i].val)) {
      if (files[i].fatal)
        return "failed to write fault injection file";
    }
  }
  return NULL;
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter = 0;
  for (;; iter++) {
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      setup_test();
      execute_one();
      exit(0);
    }
    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      sleep_ms(10);
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      if (current_time_ms() - start < 5000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

uint64_t r[3] = {0xffffffffffffffff, 0x0, 0x0};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  syz_open_dev$dri arguments: [
  //    dev: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 64 72 69 2f 63 61 72 64 23 00} (length 0xf)
  //    }
  //    id: intptr = 0x200 (8 bytes)
  //    flags: open_flags = 0x102 (8 bytes)
  //  ]
  //  returns fd_dri
  memcpy((void*)0x200000000280, "/dev/dri/card#\000", 15);
  res = -1;
  res = syz_open_dev(/*dev=*/0x200000000280, /*id=*/0x200,
                     /*flags=O_NOCTTY|O_RDWR*/ 0x102);
  if (res != -1)
    r[0] = res;
  //  ioctl$DRM_IOCTL_MODE_GETRESOURCES arguments: [
  //    fd: fd_dri (resource)
  //    cmd: const = 0xc04064a0 (4 bytes)
  //    arg: ptr[inout, drm_mode_card_res] {
  //      drm_mode_card_res {
  //        fbid: nil
  //        crtcid: ptr[out, array[drm_crtc_id]] {
  //          array[drm_crtc_id] {
  //            drm_crtc_id (resource)
  //          }
  //        }
  //        connid: nil
  //        encid: nil
  //        nfbid: len = 0x0 (4 bytes)
  //        ncrtcid: len = 0x1 (4 bytes)
  //        nconnid: len = 0x0 (4 bytes)
  //        nencid: len = 0x0 (4 bytes)
  //        maxw: const = 0x0 (4 bytes)
  //        maxh: const = 0x0 (4 bytes)
  //        minw: const = 0x0 (4 bytes)
  //        minh: const = 0x0 (4 bytes)
  //      }
  //    }
  //  ]
  *(uint64_t*)0x200000000800 = 0;
  *(uint64_t*)0x200000000808 = 0x2000000000c0;
  *(uint64_t*)0x200000000810 = 0;
  *(uint64_t*)0x200000000818 = 0;
  *(uint32_t*)0x200000000820 = 0;
  *(uint32_t*)0x200000000824 = 1;
  *(uint32_t*)0x200000000828 = 0;
  *(uint32_t*)0x20000000082c = 0;
  *(uint32_t*)0x200000000830 = 0;
  *(uint32_t*)0x200000000834 = 0;
  *(uint32_t*)0x200000000838 = 0;
  *(uint32_t*)0x20000000083c = 0;
  res = syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0xc04064a0,
                /*arg=*/0x200000000800ul);
  if (res != -1)
    r[1] = *(uint32_t*)0x2000000000c0;
  //  ioctl$DRM_IOCTL_MODE_GETCRTC arguments: [
  //    fd: fd_dri (resource)
  //    cmd: const = 0xc06864a1 (4 bytes)
  //    arg: ptr[inout, drm_mode_crtc$DRM_IOCTL_MODE_GETCRTC] {
  //      drm_mode_crtc$DRM_IOCTL_MODE_GETCRTC {
  //        set_connectors_ptr: nil
  //        count_connectors: len = 0x0 (4 bytes)
  //        crtc_id: drm_crtc_id (resource)
  //        fb_id: drm_fb_id (resource)
  //        x: int32 = 0x0 (4 bytes)
  //        y: int32 = 0x0 (4 bytes)
  //        gamma_size: int32 = 0x0 (4 bytes)
  //        mode_valid: int32 = 0x0 (4 bytes)
  //        mode: drm_mode_modeinfo {
  //          clock: int32 = 0x0 (4 bytes)
  //          hdisplay: int16 = 0x0 (2 bytes)
  //          hsync_start: int16 = 0x0 (2 bytes)
  //          hsync_end: int16 = 0x0 (2 bytes)
  //          htotal: int16 = 0x0 (2 bytes)
  //          hskew: int16 = 0x0 (2 bytes)
  //          vdisplay: int16 = 0x0 (2 bytes)
  //          vsync_start: int16 = 0x0 (2 bytes)
  //          vsync_end: int16 = 0x0 (2 bytes)
  //          vtotal: int16 = 0x0 (2 bytes)
  //          vscan: int16 = 0x0 (2 bytes)
  //          vrefresh: int32 = 0x0 (4 bytes)
  //          flags: int32 = 0x0 (4 bytes)
  //          type: int32 = 0x0 (4 bytes)
  //          name: buffer: (DirOut)
  //        }
  //      }
  //    }
  //  ]
  *(uint64_t*)0x200000000dc0 = 0;
  *(uint32_t*)0x200000000dc8 = 0;
  *(uint32_t*)0x200000000dcc = r[1];
  res = syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0xc06864a1,
                /*arg=*/0x200000000dc0ul);
  if (res != -1)
    r[2] = *(uint32_t*)0x200000000dd0;
  //  ioctl$DRM_IOCTL_MODE_GETFB2 arguments: [
  //    fd: fd_dri (resource)
  //    cmd: const = 0xc06864ce (4 bytes)
  //    arg: ptr[inout, drm_mode_fb_cmd2$DRM_IOCTL_MODE_GETFB2] {
  //      drm_mode_fb_cmd2$DRM_IOCTL_MODE_GETFB2 {
  //        fb_id: drm_fb_id (resource)
  //        width: int32 = 0x0 (4 bytes)
  //        height: int32 = 0x4 (4 bytes)
  //        pixel_format: int32 = 0x0 (4 bytes)
  //        flags: drm_mode_fb_flags = 0x2 (4 bytes)
  //        handles: array[drm_gem_handle] {
  //          drm_gem_handle (resource)
  //          drm_gem_handle (resource)
  //          drm_gem_handle (resource)
  //          drm_gem_handle (resource)
  //        }
  //        pitches: array[int32] {
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x10000 (4 bytes)
  //        }
  //        offsets: array[int32] {
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0xfffffffc (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //        }
  //        pad = 0x0 (4 bytes)
  //        modifier: array[int64] {
  //          int64 = 0x1 (8 bytes)
  //          int64 = 0x0 (8 bytes)
  //          int64 = 0x0 (8 bytes)
  //          int64 = 0x0 (8 bytes)
  //        }
  //      }
  //    }
  //  ]
  *(uint32_t*)0x2000000004c0 = r[2];
  *(uint32_t*)0x2000000004c4 = 0;
  *(uint32_t*)0x2000000004c8 = 4;
  *(uint32_t*)0x2000000004cc = 0;
  *(uint32_t*)0x2000000004d0 = 2;
  *(uint32_t*)0x2000000004e4 = 0;
  *(uint32_t*)0x2000000004e8 = 0;
  *(uint32_t*)0x2000000004ec = 0;
  *(uint32_t*)0x2000000004f0 = 0x10000;
  *(uint32_t*)0x2000000004f4 = 0;
  *(uint32_t*)0x2000000004f8 = 0;
  *(uint32_t*)0x2000000004fc = 0xfffffffc;
  *(uint32_t*)0x200000000500 = 0;
  *(uint64_t*)0x200000000508 = 1;
  *(uint64_t*)0x200000000510 = 0;
  *(uint64_t*)0x200000000518 = 0;
  *(uint64_t*)0x200000000520 = 0;
  syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0xc06864ce,
          /*arg=*/0x2000000004c0ul);
  //  ioctl$DRM_IOCTL_MODE_CURSOR arguments: [
  //    fd: fd_dri (resource)
  //    cmd: const = 0xc01c64a3 (4 bytes)
  //    arg: ptr[in, drm_mode_cursor] {
  //      drm_mode_cursor {
  //        flags: drm_mode_cursor_flags = 0x1 (4 bytes)
  //        crtc_id: drm_crtc_id (resource)
  //        x: int32 = 0x3 (4 bytes)
  //        y: int32 = 0xfffffffc (4 bytes)
  //        width: int32 = 0x326 (4 bytes)
  //        height: int32 = 0x89e (4 bytes)
  //        handle: int32 = 0x1 (4 bytes)
  //      }
  //    }
  //  ]
  *(uint32_t*)0x200000000100 = 1;
  *(uint32_t*)0x200000000104 = r[1];
  *(uint32_t*)0x200000000108 = 3;
  *(uint32_t*)0x20000000010c = 0xfffffffc;
  *(uint32_t*)0x200000000110 = 0x326;
  *(uint32_t*)0x200000000114 = 0x89e;
  *(uint32_t*)0x200000000118 = 1;
  inject_fault(13);
  syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0xc01c64a3,
          /*arg=*/0x200000000100ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200001000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  if ((reason = setup_fault()))
    printf("the reproducer may not work as expected: fault injection setup "
           "failed: %s\n",
           reason);
  loop();
  return 0;
}