// https://syzkaller.appspot.com/bug?id=432bab1ba2256ad6b034ad222e0101c65d8b2163
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

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

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 use_temporary_dir(void)
{
  char tmpdir_template[] = "./syzkaller.XXXXXX";
  char* tmpdir = mkdtemp(tmpdir_template);
  if (!tmpdir)
    exit(1);
  if (chmod(tmpdir, 0777))
    exit(1);
  if (chdir(tmpdir))
    exit(1);
}

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);
  }
}

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

int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000,
          /*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=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  install_segv_handler();
  use_temporary_dir();
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  mkdir arguments: [
  //    path: ptr[in, buffer] {
  //      buffer: {2e 2f 73 79 73 00} (length 0x6)
  //    }
  //    mode: open_mode = 0x0 (8 bytes)
  //  ]
  NONFAILING(memcpy((void*)0x200000000540, "./sys\000", 6));
  syscall(__NR_mkdir, /*path=*/0x200000000540ul, /*mode=*/0ul);
  //  mount arguments: [
  //    src: nil
  //    dst: ptr[in, buffer] {
  //      buffer: {2e 2f 73 79 73 00} (length 0x6)
  //    }
  //    type: ptr[in, buffer] {
  //      buffer: {73 79 73 66 73 00} (length 0x6)
  //    }
  //    flags: mount_flags = 0x0 (8 bytes)
  //    data: nil
  //  ]
  NONFAILING(memcpy((void*)0x200000000000, "./sys\000", 6));
  NONFAILING(memcpy((void*)0x200000000040, "sysfs\000", 6));
  syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x200000000000ul,
          /*type=*/0x200000000040ul, /*flags=*/0ul, /*data=*/0ul);
  //  openat arguments: [
  //    fd: fd_dir (resource)
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 73 79 73 2f 62 75 73 2f 70 63 69 2f 64 65 76 69 63 65
  //      73 2f 30 30 30 30 3a 30 30 3a 30 31 2e 30 2f 72 65 6d 6f 76 65 00}
  //      (length 0x2a)
  //    }
  //    flags: open_flags = 0x1 (4 bytes)
  //    mode: open_mode = 0x0 (2 bytes)
  //  ]
  //  returns fd
  NONFAILING(memcpy((void*)0x200000000080,
                    "./sys/bus/pci/devices/0000:00:01.0/remove\000", 42));
  res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000080ul,
                /*flags=O_WRONLY*/ 1, /*mode=*/0);
  if (res != -1)
    r[0] = res;
  //  syz_open_dev$dri arguments: [
  //    dev: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 64 72 69 2f 63 61 72 64 23 00} (length 0xf)
  //    }
  //    id: intptr = 0xd21 (8 bytes)
  //    flags: open_flags = 0x0 (8 bytes)
  //  ]
  //  returns fd_dri
  NONFAILING(memcpy((void*)0x2000000008c0, "/dev/dri/card#\000", 15));
  res = -1;
  NONFAILING(
      res = syz_open_dev(/*dev=*/0x2000000008c0, /*id=*/0xd21, /*flags=*/0));
  if (res != -1)
    r[1] = res;
  //  ioctl$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)
  //      }
  //    }
  //  ]
  NONFAILING(*(uint64_t*)0x2000000001c0 = 0);
  NONFAILING(*(uint64_t*)0x2000000001c8 = 0x2000000000c0);
  NONFAILING(*(uint64_t*)0x2000000001d0 = 0);
  NONFAILING(*(uint64_t*)0x2000000001d8 = 0);
  NONFAILING(*(uint32_t*)0x2000000001e0 = 0);
  NONFAILING(*(uint32_t*)0x2000000001e4 = 1);
  NONFAILING(*(uint32_t*)0x2000000001e8 = 0);
  NONFAILING(*(uint32_t*)0x2000000001ec = 0);
  NONFAILING(*(uint32_t*)0x2000000001f0 = 0);
  NONFAILING(*(uint32_t*)0x2000000001f4 = 0);
  NONFAILING(*(uint32_t*)0x2000000001f8 = 0);
  NONFAILING(*(uint32_t*)0x2000000001fc = 0);
  res = syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0xc04064a0,
                /*arg=*/0x2000000001c0ul);
  if (res != -1)
    NONFAILING(r[2] = *(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$DRM_IOCTL_MODE_GETCRTC {
  //        set_connectors_ptr: nil
  //        count_connectors: len = 0x0 (4 bytes)
  //        crtc_id: drm_crtc_id (resource)
  //        fb_id: drm_fb_id (resource)
  //        x: int32 = 0x0 (4 bytes)
  //        y: int32 = 0x0 (4 bytes)
  //        gamma_size: int32 = 0x0 (4 bytes)
  //        mode_valid: int32 = 0x0 (4 bytes)
  //        mode: drm_mode_modeinfo {
  //          clock: int32 = 0x0 (4 bytes)
  //          hdisplay: int16 = 0x0 (2 bytes)
  //          hsync_start: int16 = 0x0 (2 bytes)
  //          hsync_end: int16 = 0x0 (2 bytes)
  //          htotal: int16 = 0x0 (2 bytes)
  //          hskew: int16 = 0x0 (2 bytes)
  //          vdisplay: int16 = 0x0 (2 bytes)
  //          vsync_start: int16 = 0x0 (2 bytes)
  //          vsync_end: int16 = 0x0 (2 bytes)
  //          vtotal: int16 = 0x0 (2 bytes)
  //          vscan: int16 = 0x0 (2 bytes)
  //          vrefresh: int32 = 0x0 (4 bytes)
  //          flags: int32 = 0x0 (4 bytes)
  //          type: int32 = 0x0 (4 bytes)
  //          name: buffer: (DirOut)
  //        }
  //      }
  //    }
  //  ]
  NONFAILING(*(uint64_t*)0x200000001380 = 0);
  NONFAILING(*(uint32_t*)0x200000001388 = 0);
  NONFAILING(*(uint32_t*)0x20000000138c = r[2]);
  res = syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0xc06864a1,
                /*arg=*/0x200000001380ul);
  if (res != -1)
    NONFAILING(r[3] = *(uint32_t*)0x200000001390);
  //  ioctl$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 = 0x8002 (4 bytes)
  //        height: int32 = 0x7fff (4 bytes)
  //        pixel_format: int32 = 0x0 (4 bytes)
  //        flags: drm_mode_fb_flags = 0x0 (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 = 0x2 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //        }
  //        offsets: array[int32] {
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x4 (4 bytes)
  //          int32 = 0xfffffffe (4 bytes)
  //          int32 = 0x5e8 (4 bytes)
  //        }
  //        pad = 0x0 (4 bytes)
  //        modifier: array[int64] {
  //          int64 = 0x0 (8 bytes)
  //          int64 = 0x0 (8 bytes)
  //          int64 = 0x0 (8 bytes)
  //          int64 = 0x0 (8 bytes)
  //        }
  //      }
  //    }
  //  ]
  NONFAILING(*(uint32_t*)0x2000000012c0 = r[3]);
  NONFAILING(*(uint32_t*)0x2000000012c4 = 0x8002);
  NONFAILING(*(uint32_t*)0x2000000012c8 = 0x7fff);
  NONFAILING(*(uint32_t*)0x2000000012cc = 0);
  NONFAILING(*(uint32_t*)0x2000000012d0 = 0);
  NONFAILING(*(uint32_t*)0x2000000012e4 = 2);
  NONFAILING(*(uint32_t*)0x2000000012e8 = 0);
  NONFAILING(*(uint32_t*)0x2000000012ec = 0);
  NONFAILING(*(uint32_t*)0x2000000012f0 = 0);
  NONFAILING(*(uint32_t*)0x2000000012f4 = 0);
  NONFAILING(*(uint32_t*)0x2000000012f8 = 4);
  NONFAILING(*(uint32_t*)0x2000000012fc = 0xfffffffe);
  NONFAILING(*(uint32_t*)0x200000001300 = 0x5e8);
  NONFAILING(*(uint64_t*)0x200000001308 = 0);
  NONFAILING(*(uint64_t*)0x200000001310 = 0);
  NONFAILING(*(uint64_t*)0x200000001318 = 0);
  NONFAILING(*(uint64_t*)0x200000001320 = 0);
  syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0xc06864ce,
          /*arg=*/0x2000000012c0ul);
  //  write arguments: [
  //    fd: fd (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {31} (length 0x1)
  //    }
  //    count: len = 0x1 (8 bytes)
  //  ]
  NONFAILING(memset((void*)0x2000000000c0, 49, 1));
  syscall(__NR_write, /*fd=*/r[0], /*buf=*/0x2000000000c0ul, /*count=*/1ul);
  return 0;
}