// https://syzkaller.appspot.com/bug?id=a8f580c5268d99419fa45ec8ec53771bbaf484d9
// 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/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_bpf
#define __NR_bpf 321
#endif

static unsigned long long procid;

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 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 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[2] = {0xffffffffffffffff, 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  bpf$MAP_CREATE arguments: [
  //    cmd: const = 0x0 (8 bytes)
  //    arg: ptr[inout, array[ANYUNION]] {
  //      array[ANYUNION] {
  //        union ANYUNION {
  //          ANYBLOB: buffer: {0b 00 00 00 05 00 00 00 00 04 00 00 09 00 00 00
  //          01} (length 0x11)
  //        }
  //      }
  //    }
  //    size: len = 0x48 (8 bytes)
  //  ]
  //  returns fd_bpf_map
  memcpy((void*)0x200000000740,
         "\x0b\x00\x00\x00\x05\x00\x00\x00\x00\x04\x00\x00\x09\x00\x00\x00\x01",
         17);
  res =
      syscall(__NR_bpf, /*cmd=*/0ul, /*arg=*/0x200000000740ul, /*size=*/0x48ul);
  if (res != -1)
    r[0] = res;
  //  bpf$MAP_GET_NEXT_KEY arguments: [
  //    cmd: const = 0x2 (8 bytes)
  //    arg: ptr[in, bpf_map_get_next_arg] {
  //      bpf_map_get_next_arg {
  //        map: fd_bpf_map (resource)
  //        pad = 0x0 (4 bytes)
  //        key: ptr[in, buffer] {
  //          buffer: {} (length 0x0)
  //        }
  //        next: ptr[out, buffer] {
  //          buffer: (DirOut)
  //        }
  //        flags: const = 0x0 (8 bytes)
  //      }
  //    }
  //    size: len = 0x20 (8 bytes)
  //  ]
  *(uint32_t*)0x2000000004c0 = r[0];
  *(uint64_t*)0x2000000004c8 = 0x200000000340;
  *(uint64_t*)0x2000000004d0 = 0x2000000005c0;
  *(uint64_t*)0x2000000004d8 = 0;
  syscall(__NR_bpf, /*cmd=*/2ul, /*arg=*/0x2000000004c0ul, /*size=*/0x20ul);
  //  bpf$PROG_LOAD arguments: [
  //    cmd: const = 0x5 (8 bytes)
  //    arg: ptr[in, bpf_prog_t[flags[bpf_prog_type, int32],
  //    bpf_prog_attach_types, bpf_btf_id[opt], fd_bpf_prog[opt]]] {
  //      bpf_prog_t[flags[bpf_prog_type, int32], bpf_prog_attach_types,
  //      bpf_btf_id[opt], fd_bpf_prog[opt]] {
  //        type: bpf_prog_type = 0x11 (4 bytes)
  //        ninsn: bytesize8 = 0xc (4 bytes)
  //        insns: ptr[inout, array[ANYUNION]] {
  //          array[ANYUNION] {
  //            union ANYUNION {
  //              ANYBLOB: buffer: {18 00 00 00 4a b8 00 00 00 00 00 00 00 18 00
  //              00 00 00 00 00} (length 0x14)
  //            }
  //            union ANYUNION {
  //              ANYRES32: ANYRES32 (resource)
  //            }
  //            union ANYUNION {
  //              ANYBLOB: buffer: {00 00 00 00 00 00 00 00 b7 08 00 00 02 00 00
  //              00 7b 8a f8 ff 00 00 00 00 bf a2 00 00 00 00 00 00 07 02 00 00
  //              f8 ff ff ff b7 03 00 00 08 00 00 00 b7 04 00 00 00 00 00 00 85
  //              00 00 00 03 00 00 00 95} (length 0x41)
  //            }
  //          }
  //        }
  //        license: nil
  //        loglev: int32 = 0x0 (4 bytes)
  //        logsize: len = 0x0 (4 bytes)
  //        log: nil
  //        kern_version: bpf_kern_version = 0x0 (4 bytes)
  //        flags: bpf_prog_load_flags = 0x0 (4 bytes)
  //        prog_name: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00}
  //        (length 0x10) prog_ifindex: ifindex (resource) expected_attach_type:
  //        union bpf_prog_attach_types {
  //          fallback: bpf_attach_types = 0x0 (4 bytes)
  //        }
  //        btf_fd: fd_btf (resource)
  //        func_info_rec_size: const = 0x0 (4 bytes)
  //        func_info: nil
  //        func_info_cnt: len = 0x0 (4 bytes)
  //        line_info_rec_size: const = 0x0 (4 bytes)
  //        line_info: nil
  //        line_info_cnt: len = 0x0 (4 bytes)
  //        attach_btf_id: bpf_btf_id (resource)
  //        attach_prog_fd: fd_bpf_prog (resource)
  //        core_relo_cnt: len = 0x0 (4 bytes)
  //        fd_array: nil
  //        core_relos: nil
  //        core_relo_rec_size: const = 0x0 (4 bytes)
  //        log_true_size: int32 = 0x0 (4 bytes)
  //        prog_token_fd: union _bpf_prog_t[flags[bpf_prog_type, int32],
  //        bpf_prog_attach_types, bpf_btf_id[opt],
  //        fd_bpf_prog[opt]]_prog_token_fd_wrapper {
  //          void: buffer: {} (length 0x0)
  //        }
  //        pad: union _bpf_prog_t[flags[bpf_prog_type, int32],
  //        bpf_prog_attach_types, bpf_btf_id[opt],
  //        fd_bpf_prog[opt]]_pad_wrapper {
  //          value: const = 0x0 (4 bytes)
  //        }
  //      }
  //    }
  //    size: len = 0x94 (8 bytes)
  //  ]
  //  returns fd_bpf_prog
  *(uint32_t*)0x200000000180 = 0x11;
  *(uint32_t*)0x200000000184 = 0xc;
  *(uint64_t*)0x200000000188 = 0x200000000440;
  memcpy((void*)0x200000000440,
         "\x18\x00\x00\x00\x4a\xb8\x00\x00\x00\x00\x00\x00\x00\x18\x00\x00\x00"
         "\x00\x00\x00",
         20);
  *(uint32_t*)0x200000000454 = -1;
  memcpy((void*)0x200000000458,
         "\x00\x00\x00\x00\x00\x00\x00\x00\xb7\x08\x00\x00\x02\x00\x00\x00\x7b"
         "\x8a\xf8\xff\x00\x00\x00\x00\xbf\xa2\x00\x00\x00\x00\x00\x00\x07\x02"
         "\x00\x00\xf8\xff\xff\xff\xb7\x03\x00\x00\x08\x00\x00\x00\xb7\x04\x00"
         "\x00\x00\x00\x00\x00\x85\x00\x00\x00\x03\x00\x00\x00\x95",
         65);
  *(uint64_t*)0x200000000190 = 0;
  *(uint32_t*)0x200000000198 = 0;
  *(uint32_t*)0x20000000019c = 0;
  *(uint64_t*)0x2000000001a0 = 0;
  *(uint32_t*)0x2000000001a8 = 0;
  *(uint32_t*)0x2000000001ac = 0;
  memset((void*)0x2000000001b0, 0, 16);
  *(uint32_t*)0x2000000001c0 = 0;
  *(uint32_t*)0x2000000001c4 = 0;
  *(uint32_t*)0x2000000001c8 = -1;
  *(uint32_t*)0x2000000001cc = 0;
  *(uint64_t*)0x2000000001d0 = 0;
  *(uint32_t*)0x2000000001d8 = 0;
  *(uint32_t*)0x2000000001dc = 0;
  *(uint64_t*)0x2000000001e0 = 0;
  *(uint32_t*)0x2000000001e8 = 0;
  *(uint32_t*)0x2000000001ec = 0;
  *(uint32_t*)0x2000000001f0 = 0;
  *(uint32_t*)0x2000000001f4 = 0;
  *(uint64_t*)0x2000000001f8 = 0;
  *(uint64_t*)0x200000000200 = 0;
  *(uint32_t*)0x200000000208 = 0;
  *(uint32_t*)0x20000000020c = 0;
  *(uint32_t*)0x200000000210 = 0;
  syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000000180ul, /*size=*/0x94ul);
  //  bpf$PROG_LOAD arguments: [
  //    cmd: const = 0x5 (8 bytes)
  //    arg: ptr[in, bpf_prog_t[flags[bpf_prog_type, int32],
  //    bpf_prog_attach_types, bpf_btf_id[opt], fd_bpf_prog[opt]]] {
  //      bpf_prog_t[flags[bpf_prog_type, int32], bpf_prog_attach_types,
  //      bpf_btf_id[opt], fd_bpf_prog[opt]] {
  //        type: bpf_prog_type = 0x0 (4 bytes)
  //        ninsn: bytesize8 = 0x0 (4 bytes)
  //        insns: ptr[inout, array[ANYUNION]] {
  //          array[ANYUNION] {
  //            union ANYUNION {
  //              ANYBLOB: buffer: {18 00 00 00 00 80 00 00 00 00 00 00 00 00 00
  //              00 18 11 00 00} (length 0x14)
  //            }
  //            union ANYUNION {
  //              ANYRES32: ANYRES32 (resource)
  //            }
  //          }
  //        }
  //        license: nil
  //        loglev: int32 = 0x0 (4 bytes)
  //        logsize: len = 0x0 (4 bytes)
  //        log: nil
  //        kern_version: bpf_kern_version = 0x0 (4 bytes)
  //        flags: bpf_prog_load_flags = 0x0 (4 bytes)
  //        prog_name: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00}
  //        (length 0x10) prog_ifindex: ifindex (resource) expected_attach_type:
  //        union bpf_prog_attach_types {
  //          fallback: bpf_attach_types = 0x0 (4 bytes)
  //        }
  //        btf_fd: fd_btf (resource)
  //        func_info_rec_size: const = 0x0 (4 bytes)
  //        func_info: nil
  //        func_info_cnt: len = 0x0 (4 bytes)
  //        line_info_rec_size: const = 0x0 (4 bytes)
  //        line_info: nil
  //        line_info_cnt: len = 0x0 (4 bytes)
  //        attach_btf_id: bpf_btf_id (resource)
  //        attach_prog_fd: fd_bpf_prog (resource)
  //        core_relo_cnt: len = 0x0 (4 bytes)
  //        fd_array: nil
  //        core_relos: nil
  //        core_relo_rec_size: const = 0x0 (4 bytes)
  //        log_true_size: int32 = 0x0 (4 bytes)
  //        prog_token_fd: union _bpf_prog_t[flags[bpf_prog_type, int32],
  //        bpf_prog_attach_types, bpf_btf_id[opt],
  //        fd_bpf_prog[opt]]_prog_token_fd_wrapper {
  //          void: buffer: {} (length 0x0)
  //        }
  //        pad: union _bpf_prog_t[flags[bpf_prog_type, int32],
  //        bpf_prog_attach_types, bpf_btf_id[opt],
  //        fd_bpf_prog[opt]]_pad_wrapper {
  //          value: const = 0x0 (4 bytes)
  //        }
  //      }
  //    }
  //    size: len = 0x90 (8 bytes)
  //  ]
  //  returns fd_bpf_prog
  *(uint32_t*)0x2000000000c0 = 0;
  *(uint32_t*)0x2000000000c4 = 0;
  *(uint64_t*)0x2000000000c8 = 0x200000000440;
  memcpy((void*)0x200000000440,
         "\x18\x00\x00\x00\x00\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x18"
         "\x11\x00\x00",
         20);
  *(uint32_t*)0x200000000454 = r[0];
  *(uint64_t*)0x2000000000d0 = 0;
  *(uint32_t*)0x2000000000d8 = 0;
  *(uint32_t*)0x2000000000dc = 0;
  *(uint64_t*)0x2000000000e0 = 0;
  *(uint32_t*)0x2000000000e8 = 0;
  *(uint32_t*)0x2000000000ec = 0;
  memset((void*)0x2000000000f0, 0, 16);
  *(uint32_t*)0x200000000100 = 0;
  *(uint32_t*)0x200000000104 = 0;
  *(uint32_t*)0x200000000108 = -1;
  *(uint32_t*)0x20000000010c = 0;
  *(uint64_t*)0x200000000110 = 0;
  *(uint32_t*)0x200000000118 = 0;
  *(uint32_t*)0x20000000011c = 0;
  *(uint64_t*)0x200000000120 = 0;
  *(uint32_t*)0x200000000128 = 0;
  *(uint32_t*)0x20000000012c = 0;
  *(uint32_t*)0x200000000130 = 0;
  *(uint32_t*)0x200000000134 = 0;
  *(uint64_t*)0x200000000138 = 0;
  *(uint64_t*)0x200000000140 = 0;
  *(uint32_t*)0x200000000148 = 0;
  *(uint32_t*)0x20000000014c = 0;
  *(uint32_t*)0x200000000150 = 0;
  syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x2000000000c0ul, /*size=*/0x90ul);
  //  bpf$PROG_LOAD arguments: [
  //    cmd: const = 0x5 (8 bytes)
  //    arg: ptr[in, bpf_prog_t[flags[bpf_prog_type, int32],
  //    bpf_prog_attach_types, bpf_btf_id[opt], fd_bpf_prog[opt]]] {
  //      bpf_prog_t[flags[bpf_prog_type, int32], bpf_prog_attach_types,
  //      bpf_btf_id[opt], fd_bpf_prog[opt]] {
  //        type: bpf_prog_type = 0x18 (4 bytes)
  //        ninsn: bytesize8 = 0xc (4 bytes)
  //        insns: ptr[inout, array[ANYUNION]] {
  //          array[ANYUNION] {
  //          }
  //        }
  //        license: ptr[in, buffer] {
  //          buffer: {47 50 4c 00} (length 0x4)
  //        }
  //        loglev: int32 = 0x0 (4 bytes)
  //        logsize: len = 0x0 (4 bytes)
  //        log: nil
  //        kern_version: bpf_kern_version = 0x0 (4 bytes)
  //        flags: bpf_prog_load_flags = 0x0 (4 bytes)
  //        prog_name: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00}
  //        (length 0x10) prog_ifindex: ifindex (resource) expected_attach_type:
  //        union bpf_prog_attach_types {
  //          fallback: bpf_attach_types = 0x0 (4 bytes)
  //        }
  //        btf_fd: fd_btf (resource)
  //        func_info_rec_size: const = 0x0 (4 bytes)
  //        func_info: nil
  //        func_info_cnt: len = 0x0 (4 bytes)
  //        line_info_rec_size: const = 0x0 (4 bytes)
  //        line_info: nil
  //        line_info_cnt: len = 0x0 (4 bytes)
  //        attach_btf_id: bpf_btf_id (resource)
  //        attach_prog_fd: fd_bpf_prog (resource)
  //        core_relo_cnt: len = 0x0 (4 bytes)
  //        fd_array: nil
  //        core_relos: nil
  //        core_relo_rec_size: const = 0x0 (4 bytes)
  //        log_true_size: int32 = 0x0 (4 bytes)
  //        prog_token_fd: union _bpf_prog_t[flags[bpf_prog_type, int32],
  //        bpf_prog_attach_types, bpf_btf_id[opt],
  //        fd_bpf_prog[opt]]_prog_token_fd_wrapper {
  //          void: buffer: {} (length 0x0)
  //        }
  //        pad: union _bpf_prog_t[flags[bpf_prog_type, int32],
  //        bpf_prog_attach_types, bpf_btf_id[opt],
  //        fd_bpf_prog[opt]]_pad_wrapper {
  //          value: const = 0x0 (4 bytes)
  //        }
  //      }
  //    }
  //    size: len = 0x90 (8 bytes)
  //  ]
  //  returns fd_bpf_prog
  *(uint32_t*)0x2000000005c0 = 0x18;
  *(uint32_t*)0x2000000005c4 = 0xc;
  *(uint64_t*)0x2000000005c8 = 0x200000000440;
  *(uint64_t*)0x2000000005d0 = 0x200000000240;
  memcpy((void*)0x200000000240, "GPL\000", 4);
  *(uint32_t*)0x2000000005d8 = 0;
  *(uint32_t*)0x2000000005dc = 0;
  *(uint64_t*)0x2000000005e0 = 0;
  *(uint32_t*)0x2000000005e8 = 0;
  *(uint32_t*)0x2000000005ec = 0;
  memset((void*)0x2000000005f0, 0, 16);
  *(uint32_t*)0x200000000600 = 0;
  *(uint32_t*)0x200000000604 = 0;
  *(uint32_t*)0x200000000608 = -1;
  *(uint32_t*)0x20000000060c = 0;
  *(uint64_t*)0x200000000610 = 0;
  *(uint32_t*)0x200000000618 = 0;
  *(uint32_t*)0x20000000061c = 0;
  *(uint64_t*)0x200000000620 = 0;
  *(uint32_t*)0x200000000628 = 0;
  *(uint32_t*)0x20000000062c = 0;
  *(uint32_t*)0x200000000630 = 0;
  *(uint32_t*)0x200000000634 = 0;
  *(uint64_t*)0x200000000638 = 0;
  *(uint64_t*)0x200000000640 = 0;
  *(uint32_t*)0x200000000648 = 0;
  *(uint32_t*)0x20000000064c = 0;
  *(uint32_t*)0x200000000650 = 0;
  res =
      syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x2000000005c0ul, /*size=*/0x90ul);
  if (res != -1)
    r[1] = res;
  //  bpf$BPF_RAW_TRACEPOINT_OPEN arguments: [
  //    cmd: const = 0x11 (8 bytes)
  //    arg: ptr[in, bpf_raw_tracepoint] {
  //      bpf_raw_tracepoint {
  //        name: ptr[in, buffer] {
  //          buffer: {6d 6d 5f 70 61 67 65 5f 61 6c 6c 6f 63 00} (length 0xe)
  //        }
  //        prog_fd: fd_bpf_prog_raw_tracepoint (resource)
  //        pad: const = 0x0 (4 bytes)
  //        cookie: int64 = 0x0 (8 bytes)
  //      }
  //    }
  //    size: len = 0x10 (8 bytes)
  //  ]
  //  returns fd_perf_base
  *(uint64_t*)0x200000000140 = 0x200000000040;
  memcpy((void*)0x200000000040, "mm_page_alloc\000", 14);
  *(uint32_t*)0x200000000148 = r[1];
  *(uint32_t*)0x20000000014c = 0;
  *(uint64_t*)0x200000000150 = 0;
  syscall(__NR_bpf, /*cmd=*/0x11ul, /*arg=*/0x200000000140ul, /*size=*/0x10ul);
}
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;
  for (procid = 0; procid < 5; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}