// https://syzkaller.appspot.com/bug?id=8fa72f6bf8ed852bab30490a709dbb7916a68eba
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <setjmp.h>
#include <signal.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>

#ifndef __NR_io_uring_enter
#define __NR_io_uring_enter 426
#endif
#ifndef __NR_io_uring_setup
#define __NR_io_uring_setup 425
#endif
#ifndef __NR_seccomp
#define __NR_seccomp 317
#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;                                                                        \
  })

#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_io_uring_submit(volatile long a0, volatile long a1,
                                volatile long a2)
{
  char* ring_ptr = (char*)a0;
  char* sqes_ptr = (char*)a1;
  char* sqe = (char*)a2;
  uint32_t sq_ring_mask = *(uint32_t*)(ring_ptr + SQ_RING_MASK_OFFSET);
  uint32_t* sq_tail_ptr = (uint32_t*)(ring_ptr + SQ_TAIL_OFFSET);
  uint32_t sq_tail = *sq_tail_ptr & sq_ring_mask;
  char* sqe_dest = sqes_ptr + sq_tail * SIZEOF_IO_URING_SQE;
  memcpy(sqe_dest, sqe, SIZEOF_IO_URING_SQE);
  uint32_t sq_tail_next = *sq_tail_ptr + 1;
  __atomic_store_n(sq_tail_ptr, sq_tail_next, __ATOMIC_RELEASE);
  return 0;
}

static long syz_memcpy_off(volatile long a0, volatile long a1, volatile long a2,
                           volatile long a3, volatile long a4)
{
  char* dest = (char*)a0;
  uint32_t dest_off = (uint32_t)a1;
  char* src = (char*)a2;
  uint32_t src_off = (uint32_t)a3;
  size_t n = (size_t)a4;
  return (long)memcpy(dest + dest_off, src + src_off, n);
}

uint64_t r[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0x0, 0x0};

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;
  install_segv_handler();
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  signalfd4 arguments: [
  //    fd: fd (resource)
  //    mask: ptr[in, sigset_t] {
  //      sigset_t {
  //        mask: array[intptr] {
  //          intptr = 0xffefffffff7ffffc (8 bytes)
  //        }
  //      }
  //    }
  //    size: len = 0x8 (8 bytes)
  //    flags: signalfd_flags = 0x800 (8 bytes)
  //  ]
  //  returns fd
  NONFAILING(*(uint64_t*)0x200000000140 = 0xffefffffff7ffffc);
  res = syscall(__NR_signalfd4, /*fd=*/(intptr_t)-1, /*mask=*/0x200000000140ul,
                /*size=*/8ul, /*flags=SFD_NONBLOCK*/ 0x800ul);
  if (res != -1)
    r[0] = res;
  //  syz_io_uring_setup arguments: [
  //    entries: int32 = 0xbd7 (4 bytes)
  //    params: ptr[inout, io_uring_params] {
  //      io_uring_params {
  //        sq_entries: int32 = 0x0 (4 bytes)
  //        cq_entries: int32 = 0x6b0 (4 bytes)
  //        flags: io_uring_setup_flags = 0x1000 (4 bytes)
  //        sq_thread_cpu: int32 = 0x2 (4 bytes)
  //        sq_thread_idle: int32 = 0x4080032f (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: ptr[out, sqes_ptr] {
  //      sqes_ptr (resource)
  //    }
  //  ]
  //  returns fd_io_uring
  NONFAILING(*(uint32_t*)0x200000000544 = 0x6b0);
  NONFAILING(*(uint32_t*)0x200000000548 = 0x1000);
  NONFAILING(*(uint32_t*)0x20000000054c = 2);
  NONFAILING(*(uint32_t*)0x200000000550 = 0x4080032f);
  NONFAILING(*(uint32_t*)0x200000000558 = -1);
  NONFAILING(memset((void*)0x20000000055c, 0, 12));
  res = -1;
  NONFAILING(res = syz_io_uring_setup(
                 /*entries=*/0xbd7, /*params=*/0x200000000540,
                 /*ring_ptr=*/0x200000000000, /*sqes_ptr=*/0x200000000500));
  if (res != -1) {
    r[1] = res;
    NONFAILING(r[2] = *(uint64_t*)0x200000000000);
    NONFAILING(r[3] = *(uint64_t*)0x200000000500);
  }
  //  syz_memcpy_off$IO_URING_METADATA_GENERIC arguments: [
  //    ring_ptr: ring_ptr (resource)
  //    off: io_uring_offsets = 0x4 (8 bytes)
  //    src: ptr[in, int32] {
  //      int32 = 0xfffffffc (4 bytes)
  //    }
  //    src_off: const = 0x0 (8 bytes)
  //    nbytes: const = 0x4 (8 bytes)
  //  ]
  NONFAILING(*(uint32_t*)0x200000000180 = 0xfffffffc);
  NONFAILING(syz_memcpy_off(/*ring_ptr=*/r[2], /*off=*/4,
                            /*src=*/0x200000000180, /*src_off=*/0,
                            /*nbytes=*/4));
  //  syz_io_uring_submit arguments: [
  //    ring_ptr: ring_ptr (resource)
  //    sqes_ptr: sqes_ptr (resource)
  //    sqe: ptr[in, io_uring_sqe_u] {
  //      union io_uring_sqe_u {
  //        IORING_OP_READV: union io_uring_sqe_readv {
  //          pass_iovec: io_uring_sqe[IORING_OP_READV, flags[ioprio_priorities,
  //          int16], fd_or_fixed_fd_index, fileoff[int64], ptr[in,
  //          array[iovec_out]], len[addr, int32], flags[rwf_flags, int32],
  //          sqe_user_data_not_openat, personality_only_misc] {
  //            opcode: const = 0x1 (1 bytes)
  //            flags: iosqe_flags = 0x0 (1 bytes)
  //            ioprio: ioprio_priorities = 0x4004 (2 bytes)
  //            fd: union fd_or_fixed_fd_index {
  //              fd: fd (resource)
  //            }
  //            off: int64 = 0xa (8 bytes)
  //            addr: ptr[in, array[iovec[out, array[int8]]]] {
  //              array[iovec[out, array[int8]]] {
  //                iovec[out, array[int8]] {
  //                  addr: ptr[out, buffer] {
  //                    buffer: (DirOut)
  //                  }
  //                  len: len = 0xcb (8 bytes)
  //                }
  //              }
  //            }
  //            len: len = 0x1 (4 bytes)
  //            misc_flags: rwf_flags = 0x0 (4 bytes)
  //            user_data: sqe_user_data_not_openat = 0x0 (8 bytes)
  //            misc: personality_only_misc {
  //              buf_index_unused: const = 0x0 (2 bytes)
  //              ioring_personality_id: ioring_personality_id (resource)
  //              pad_unused: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //              00 00 00 00 00 00} (length 0x14)
  //            }
  //          }
  //        }
  //      }
  //    }
  //  ]
  NONFAILING(*(uint8_t*)0x2000000000c0 = 1);
  NONFAILING(*(uint8_t*)0x2000000000c1 = 0);
  NONFAILING(*(uint16_t*)0x2000000000c2 = 0x4004);
  NONFAILING(*(uint32_t*)0x2000000000c4 = r[0]);
  NONFAILING(*(uint64_t*)0x2000000000c8 = 0xa);
  NONFAILING(*(uint64_t*)0x2000000000d0 = 0x200000000100);
  NONFAILING(*(uint64_t*)0x200000000100 = 0x200000000400);
  NONFAILING(*(uint64_t*)0x200000000108 = 0xcb);
  NONFAILING(*(uint32_t*)0x2000000000d8 = 1);
  NONFAILING(*(uint32_t*)0x2000000000dc = 0);
  NONFAILING(*(uint64_t*)0x2000000000e0 = 0);
  NONFAILING(*(uint16_t*)0x2000000000e8 = 0);
  NONFAILING(*(uint16_t*)0x2000000000ea = 0);
  NONFAILING(memset((void*)0x2000000000ec, 0, 20));
  NONFAILING(syz_io_uring_submit(/*ring_ptr=*/r[2], /*sqes_ptr=*/r[3],
                                 /*sqe=*/0x2000000000c0));
  //  io_uring_enter arguments: [
  //    fd: fd_io_uring (resource)
  //    to_submit: int32 = 0x847ba (4 bytes)
  //    min_complete: int32 = 0x0 (4 bytes)
  //    flags: io_uring_enter_flags = 0xe (8 bytes)
  //    sigmask: nil
  //    size: len = 0x0 (8 bytes)
  //  ]
  syscall(
      __NR_io_uring_enter, /*fd=*/r[1], /*to_submit=*/0x847ba,
      /*min_complete=*/0,
      /*flags=IORING_ENTER_EXT_ARG|IORING_ENTER_SQ_WAIT|IORING_ENTER_SQ_WAKEUP*/
      0xeul, /*sigmask=*/0ul, /*size=*/0ul);
  //  seccomp$SECCOMP_SET_MODE_FILTER_LISTENER arguments: [
  //    op: const = 0x1 (8 bytes)
  //    flags: seccomp_flags_listener = 0x0 (8 bytes)
  //    arg: ptr[in, sock_fprog] {
  //      sock_fprog {
  //        len: len = 0x1 (2 bytes)
  //        pad = 0x0 (6 bytes)
  //        filter: ptr[in, array[sock_filter]] {
  //          array[sock_filter] {
  //            sock_filter {
  //              code: int16 = 0x6 (2 bytes)
  //              jt: int8 = 0xff (1 bytes)
  //              jf: int8 = 0x1 (1 bytes)
  //              k: int32 = 0x3fff0000 (4 bytes)
  //            }
  //          }
  //        }
  //      }
  //    }
  //  ]
  //  returns fd_seccomp
  NONFAILING(*(uint16_t*)0x200000000240 = 1);
  NONFAILING(*(uint64_t*)0x200000000248 = 0x2000000003c0);
  NONFAILING(*(uint16_t*)0x2000000003c0 = 6);
  NONFAILING(*(uint8_t*)0x2000000003c2 = -1);
  NONFAILING(*(uint8_t*)0x2000000003c3 = 1);
  NONFAILING(*(uint32_t*)0x2000000003c4 = 0x3fff0000);
  syscall(__NR_seccomp, /*op=*/1ul, /*flags=*/0ul, /*arg=*/0x200000000240ul);
  return 0;
}