// https://syzkaller.appspot.com/bug?id=e08ee8e595bbb188969072c7c4264d8195ce5b83
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.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/mman.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>

#ifndef __NR_io_uring_setup
#define __NR_io_uring_setup 425
#endif

static __thread int clone_ongoing;
static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* ctx)
{
  if (__atomic_load_n(&clone_ongoing, __ATOMIC_RELAXED) != 0) {
    exit(sig);
  }
  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 (skip && valid) {
    _longjmp(segv_env, 1);
  }
  exit(sig);
}

static void install_segv_handler(void)
{
  struct sigaction sa;
  memset(&sa, 0, sizeof(sa));
  sa.sa_handler = SIG_IGN;
  syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8);
  syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8);
  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 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;
}

#define SIZEOF_IO_URING_SQE 64
#define SIZEOF_IO_URING_CQE 16
#define SQ_HEAD_OFFSET 0
#define SQ_TAIL_OFFSET 64
#define SQ_RING_MASK_OFFSET 256
#define SQ_RING_ENTRIES_OFFSET 264
#define SQ_FLAGS_OFFSET 276
#define SQ_DROPPED_OFFSET 272
#define CQ_HEAD_OFFSET 128
#define CQ_TAIL_OFFSET 192
#define CQ_RING_MASK_OFFSET 260
#define CQ_RING_ENTRIES_OFFSET 268
#define CQ_RING_OVERFLOW_OFFSET 284
#define CQ_FLAGS_OFFSET 280
#define CQ_CQES_OFFSET 320

struct io_sqring_offsets {
  uint32_t head;
  uint32_t tail;
  uint32_t ring_mask;
  uint32_t ring_entries;
  uint32_t flags;
  uint32_t dropped;
  uint32_t array;
  uint32_t resv1;
  uint64_t resv2;
};

struct io_cqring_offsets {
  uint32_t head;
  uint32_t tail;
  uint32_t ring_mask;
  uint32_t ring_entries;
  uint32_t overflow;
  uint32_t cqes;
  uint64_t resv[2];
};

struct io_uring_params {
  uint32_t sq_entries;
  uint32_t cq_entries;
  uint32_t flags;
  uint32_t sq_thread_cpu;
  uint32_t sq_thread_idle;
  uint32_t features;
  uint32_t resv[4];
  struct io_sqring_offsets sq_off;
  struct io_cqring_offsets cq_off;
};

#define IORING_OFF_SQ_RING 0
#define IORING_OFF_SQES 0x10000000ULL
#define IORING_SETUP_SQE128 (1U << 10)
#define IORING_SETUP_CQE32 (1U << 11)

static long syz_io_uring_setup(volatile long a0, volatile long a1,
                               volatile long a2, volatile long a3)
{
  uint32_t entries = (uint32_t)a0;
  struct io_uring_params* setup_params = (struct io_uring_params*)a1;
  void** ring_ptr_out = (void**)a2;
  void** sqes_ptr_out = (void**)a3;
  setup_params->flags &= ~(IORING_SETUP_CQE32 | IORING_SETUP_SQE128);
  uint32_t fd_io_uring = syscall(__NR_io_uring_setup, entries, setup_params);
  uint32_t sq_ring_sz =
      setup_params->sq_off.array + setup_params->sq_entries * sizeof(uint32_t);
  uint32_t cq_ring_sz = setup_params->cq_off.cqes +
                        setup_params->cq_entries * SIZEOF_IO_URING_CQE;
  uint32_t ring_sz = sq_ring_sz > cq_ring_sz ? sq_ring_sz : cq_ring_sz;
  *ring_ptr_out =
      mmap(0, ring_sz, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE,
           fd_io_uring, IORING_OFF_SQ_RING);
  uint32_t sqes_sz = setup_params->sq_entries * SIZEOF_IO_URING_SQE;
  *sqes_ptr_out = mmap(0, sqes_sz, PROT_READ | PROT_WRITE,
                       MAP_SHARED | MAP_POPULATE, fd_io_uring, IORING_OFF_SQES);
  uint32_t* array =
      (uint32_t*)((uintptr_t)*ring_ptr_out + setup_params->sq_off.array);
  for (uint32_t index = 0; index < entries; index++)
    array[index] = index;
  return fd_io_uring;
}

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 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");
}

#define KMEMLEAK_FILE "/sys/kernel/debug/kmemleak"

static const char* setup_leak()
{
  if (!write_file(KMEMLEAK_FILE, "scan=off")) {
    if (errno == EBUSY)
      return "KMEMLEAK disabled: increase CONFIG_DEBUG_KMEMLEAK_EARLY_LOG_SIZE"
             " or unset CONFIG_DEBUG_KMEMLEAK_DEFAULT_OFF";
    return "failed to write(kmemleak, \"scan=off\")";
  }
  if (!write_file(KMEMLEAK_FILE, "scan"))
    return "failed to write(kmemleak, \"scan\")";
  sleep(5);
  if (!write_file(KMEMLEAK_FILE, "scan"))
    return "failed to write(kmemleak, \"scan\")";
  if (!write_file(KMEMLEAK_FILE, "clear"))
    return "failed to write(kmemleak, \"clear\")";
  return NULL;
}

static void check_leaks(void)
{
  int fd = open(KMEMLEAK_FILE, O_RDWR);
  if (fd == -1)
    exit(1);
  uint64_t start = current_time_ms();
  if (write(fd, "scan", 4) != 4)
    exit(1);
  sleep(1);
  while (current_time_ms() - start < 4 * 1000)
    sleep(1);
  if (write(fd, "scan", 4) != 4)
    exit(1);
  static char buf[128 << 10];
  ssize_t n = read(fd, buf, sizeof(buf) - 1);
  if (n < 0)
    exit(1);
  int nleaks = 0;
  if (n != 0) {
    sleep(1);
    if (write(fd, "scan", 4) != 4)
      exit(1);
    if (lseek(fd, 0, SEEK_SET) < 0)
      exit(1);
    n = read(fd, buf, sizeof(buf) - 1);
    if (n < 0)
      exit(1);
    buf[n] = 0;
    char* pos = buf;
    char* end = buf + n;
    while (pos < end) {
      char* next = strstr(pos + 1, "unreferenced object");
      if (!next)
        next = end;
      char prev = *next;
      *next = 0;
      fprintf(stderr, "BUG: memory leak\n%s\n", pos);
      *next = prev;
      pos = next;
      nleaks++;
    }
  }
  if (write(fd, "clear", 5) != 5)
    exit(1);
  close(fd);
  if (nleaks)
    exit(1);
}

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;
    }
    check_leaks();
  }
}

uint64_t r[5] = {0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  syz_io_uring_setup arguments: [
  //    entries: int32 = 0x10d (4 bytes)
  //    params: ptr[inout, io_uring_params] {
  //      io_uring_params {
  //        sq_entries: int32 = 0x0 (4 bytes)
  //        cq_entries: int32 = 0x0 (4 bytes)
  //        flags: io_uring_setup_flags = 0x0 (4 bytes)
  //        sq_thread_cpu: int32 = 0x80000 (4 bytes)
  //        sq_thread_idle: int32 = 0x0 (4 bytes)
  //        features: int32 = 0x0 (4 bytes)
  //        wq_fd: fd_io_uring (resource)
  //        resv: buffer: {00 00 00 00 00 00 00 00 00 00 00 00} (length 0xc)
  //        sq_off: array[int32] {
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //        }
  //        cq_off: array[int32] {
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //        }
  //      }
  //    }
  //    ring_ptr: ptr[out, ring_ptr] {
  //      ring_ptr (resource)
  //    }
  //    sqes_ptr: nil
  //  ]
  //  returns fd_io_uring
  NONFAILING(*(uint32_t*)0x200000000144 = 0);
  NONFAILING(*(uint32_t*)0x200000000148 = 0);
  NONFAILING(*(uint32_t*)0x20000000014c = 0x80000);
  NONFAILING(*(uint32_t*)0x200000000150 = 0);
  NONFAILING(*(uint32_t*)0x200000000158 = -1);
  NONFAILING(memset((void*)0x20000000015c, 0, 12));
  NONFAILING(syz_io_uring_setup(/*entries=*/0x10d, /*params=*/0x200000000140,
                                /*ring_ptr=*/0x200000000340, /*sqes_ptr=*/0));
  //  syz_open_dev$dri arguments: [
  //    dev: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 64 72 69 2f 63 61 72 64 23 00} (length 0xf)
  //    }
  //    id: intptr = 0x1 (8 bytes)
  //    flags: open_flags = 0x400 (8 bytes)
  //  ]
  //  returns fd_dri
  NONFAILING(memcpy((void*)0x200000000080, "/dev/dri/card#\000", 15));
  res = -1;
  NONFAILING(res = syz_open_dev(/*dev=*/0x200000000080, /*id=*/1,
                                /*flags=O_APPEND*/ 0x400));
  if (res != -1)
    r[0] = res;
  //  ioctl$DRM_IOCTL_SET_CLIENT_CAP arguments: [
  //    fd: fd_dri (resource)
  //    cmd: const = 0x4010640d (4 bytes)
  //    arg: ptr[in, drm_get_cap] {
  //      drm_get_cap {
  //        cap: drm_cap = 0x3 (8 bytes)
  //        val: const = 0x2 (8 bytes)
  //      }
  //    }
  //  ]
  NONFAILING(*(uint64_t*)0x200000000000 = 3);
  NONFAILING(*(uint64_t*)0x200000000008 = 2);
  syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x4010640d,
          /*arg=*/0x200000000000ul);
  //  ioctl$DRM_IOCTL_MODE_GETPLANERESOURCES arguments: [
  //    fd: fd_dri (resource)
  //    cmd: const = 0xc01064b5 (4 bytes)
  //    arg: ptr[inout, drm_mode_get_plane_res] {
  //      drm_mode_get_plane_res {
  //        ids: ptr[out, array[drm_plane_id]] {
  //          array[drm_plane_id] {
  //            drm_plane_id (resource)
  //          }
  //        }
  //        cnt: len = 0x1 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //  ]
  NONFAILING(*(uint64_t*)0x200000000140 = 0x200000000040);
  NONFAILING(*(uint32_t*)0x200000000148 = 1);
  res = syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0xc01064b5,
                /*arg=*/0x200000000140ul);
  if (res != -1)
    NONFAILING(r[1] = *(uint32_t*)0x200000000040);
  //  ioctl$DRM_IOCTL_MODE_GETPLANE arguments: [
  //    fd: fd_dri (resource)
  //    cmd: const = 0xc02064b6 (4 bytes)
  //    arg: ptr[inout, drm_mode_get_plane] {
  //      drm_mode_get_plane {
  //        plane_id: drm_plane_id (resource)
  //        crtc_id: drm_crtc_id (resource)
  //        fb_id: drm_fb_id (resource)
  //        possible_crtcs: const = 0x0 (4 bytes)
  //        gamma_size: const = 0x0 (4 bytes)
  //        count_format_types: len = 0x0 (4 bytes)
  //        format_type_ptr: nil
  //      }
  //    }
  //  ]
  NONFAILING(*(uint32_t*)0x2000000001c0 = r[1]);
  NONFAILING(*(uint32_t*)0x2000000001c4 = 0);
  NONFAILING(*(uint32_t*)0x2000000001c8 = 0);
  NONFAILING(*(uint32_t*)0x2000000001cc = 0);
  NONFAILING(*(uint32_t*)0x2000000001d0 = 0);
  NONFAILING(*(uint32_t*)0x2000000001d4 = 0);
  NONFAILING(*(uint64_t*)0x2000000001d8 = 0);
  res = syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0xc02064b6,
                /*arg=*/0x2000000001c0ul);
  if (res != -1)
    NONFAILING(r[2] = *(uint32_t*)0x2000000001c4);
  //  setrlimit arguments: [
  //    res: rlimit_type = 0x7 (8 bytes)
  //    rlim: ptr[in, rlimit] {
  //      rlimit {
  //        soft: intptr = 0x0 (8 bytes)
  //        hard: intptr = 0x0 (8 bytes)
  //      }
  //    }
  //  ]
  NONFAILING(*(uint64_t*)0x200000000400 = 0);
  NONFAILING(*(uint64_t*)0x200000000408 = 0);
  syscall(__NR_setrlimit, /*res=RLIMIT_NOFILE*/ 7ul, /*rlim=*/0x200000000400ul);
  //  ioctl$DRM_IOCTL_MODE_OBJ_GETPROPERTIES arguments: [
  //    fd: fd_dri (resource)
  //    cmd: const = 0xc02064b9 (4 bytes)
  //    arg: ptr[inout, drm_mode_obj_get_properties] {
  //      drm_mode_obj_get_properties {
  //        props_ptr: ptr[out, array[drm_prop_id]] {
  //          array[drm_prop_id] {
  //            drm_prop_id (resource)
  //            drm_prop_id (resource)
  //            drm_prop_id (resource)
  //          }
  //        }
  //        prop_values_ptr: ptr[out, array[int64]] {
  //          array[int64] {
  //          }
  //        }
  //        count_props: len = 0x3 (4 bytes)
  //        obj_id: drm_obj_id (resource)
  //        obj_type: drm_obj_type = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //  ]
  NONFAILING(*(uint64_t*)0x2000000002c0 = 0x200000000240);
  NONFAILING(*(uint64_t*)0x2000000002c8 = 0x200000000040);
  NONFAILING(*(uint32_t*)0x2000000002d0 = 3);
  NONFAILING(*(uint32_t*)0x2000000002d4 = r[2]);
  NONFAILING(*(uint32_t*)0x2000000002d8 = 0);
  res = syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0xc02064b9,
                /*arg=*/0x2000000002c0ul);
  if (res != -1) {
    NONFAILING(r[3] = *(uint32_t*)0x200000000240);
    NONFAILING(r[4] = *(uint32_t*)0x200000000248);
  }
  //  ioctl$DRM_IOCTL_MODE_ATOMIC arguments: [
  //    fd: fd_dri (resource)
  //    cmd: const = 0xc03864bc (4 bytes)
  //    arg: ptr[in, drm_mode_atomic] {
  //      drm_mode_atomic {
  //        flags: drm_mode_atomic_flags = 0x0 (4 bytes)
  //        count_objs: len = 0x1 (4 bytes)
  //        objs_ptr: ptr[in, array[drm_obj_id]] {
  //          array[drm_obj_id] {
  //            drm_obj_id (resource)
  //          }
  //        }
  //        count_props_ptr: ptr[in, array[int32]] {
  //          array[int32] {
  //            int32 = 0x3 (4 bytes)
  //          }
  //        }
  //        props_ptr: ptr[in, array[drm_prop_id]] {
  //          array[drm_prop_id] {
  //            drm_prop_id (resource)
  //            drm_prop_id (resource)
  //            drm_prop_id (resource)
  //          }
  //        }
  //        prop_values_ptr: ptr[in, array[int64]] {
  //          array[int64] {
  //          }
  //        }
  //        reserved: const = 0x0 (8 bytes)
  //        user_data: int64 = 0xffffffffffffffff (8 bytes)
  //      }
  //    }
  //  ]
  NONFAILING(*(uint32_t*)0x200000000580 = 0);
  NONFAILING(*(uint32_t*)0x200000000584 = 1);
  NONFAILING(*(uint64_t*)0x200000000588 = 0x200000000180);
  NONFAILING(*(uint32_t*)0x200000000180 = r[2]);
  NONFAILING(*(uint64_t*)0x200000000590 = 0x2000000000c0);
  NONFAILING(*(uint32_t*)0x2000000000c0 = 3);
  NONFAILING(*(uint64_t*)0x200000000598 = 0x200000000640);
  NONFAILING(*(uint32_t*)0x200000000640 = r[4]);
  NONFAILING(*(uint32_t*)0x200000000644 = r[3]);
  NONFAILING(*(uint32_t*)0x200000000648 = r[3]);
  NONFAILING(*(uint64_t*)0x2000000005a0 = 0x200000000340);
  NONFAILING(*(uint64_t*)0x2000000005a8 = 0);
  NONFAILING(*(uint64_t*)0x2000000005b0 = -1);
  syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0xc03864bc,
          /*arg=*/0x200000000580ul);
}
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_leak()))
    printf("the reproducer may not work as expected: leak checking setup "
           "failed: %s\n",
           reason);
  install_segv_handler();
  loop();
  return 0;
}