// https://syzkaller.appspot.com/bug?id=12ffde0f016e7572c26e71bda369ec9f5b857e63
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <fcntl.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>

#ifndef __NR_mmap
#define __NR_mmap 192
#endif
#ifndef __NR_mremap
#define __NR_mremap 163
#endif
#undef __NR_mmap
#define __NR_mmap __NR_mmap2

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);
  }
}

int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x7ffff000, /*len=*/0x1000, /*prot=*/0,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32,
          /*fd=*/(intptr_t)-1, /*offset=*/0);
  syscall(__NR_mmap, /*addr=*/0x80000000, /*len=*/0x1000000,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32,
          /*fd=*/(intptr_t)-1, /*offset=*/0);
  syscall(__NR_mmap, /*addr=*/0x81000000, /*len=*/0x1000, /*prot=*/0,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32,
          /*fd=*/(intptr_t)-1, /*offset=*/0);
  const char* reason;
  (void)reason;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  syz_open_dev$sg arguments: [
  //    dev: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 73 67 23 00} (length 0x9)
  //    }
  //    id: intptr = 0x10000004000 (4 bytes)
  //    flags: open_flags = 0x1 (4 bytes)
  //  ]
  //  returns fd_sg
  memcpy((void*)0x80000000, "/dev/sg#\000", 9);
  syz_open_dev(/*dev=*/0x80000000, /*id=*/0x4000, /*flags=O_WRONLY*/ 1);
  //  mremap arguments: [
  //    addr: VMA[0x4000]
  //    len: len = 0x200000 (4 bytes)
  //    newlen: len = 0x4000 (4 bytes)
  //    flags: mremap_flags = 0x3 (4 bytes)
  //    newaddr: VMA[0x4000]
  //  ]
  syscall(__NR_mremap, /*addr=*/0x80002000, /*len=*/0x200000, /*newlen=*/0x4000,
          /*flags=MREMAP_FIXED|MREMAP_MAYMOVE*/ 3, /*newaddr=*/0x80ffc000);
  //  mremap arguments: [
  //    addr: VMA[0x4000]
  //    len: len = 0x4000 (4 bytes)
  //    newlen: len = 0x4000 (4 bytes)
  //    flags: mremap_flags = 0x7 (4 bytes)
  //    newaddr: VMA[0x4000]
  //  ]
  syscall(__NR_mremap, /*addr=*/0x80ffc000, /*len=*/0x4000, /*newlen=*/0x4000,
          /*flags=MREMAP_DONTUNMAP|MREMAP_FIXED|MREMAP_MAYMOVE*/ 7,
          /*newaddr=*/0x80002000);
  //  mmap arguments: [
  //    addr: VMA[0x4000]
  //    len: len = 0x4000 (4 bytes)
  //    prot: mmap_prot = 0x0 (4 bytes)
  //    flags: mmap_flags = 0x840000000000a132 (4 bytes)
  //    fd: fd (resource)
  //    offset: intptr = 0xff46d000 (4 bytes)
  //  ]
  syscall(__NR_mmap, /*addr=*/0x80ffb000, /*len=*/0x4000, /*prot=*/0,
          /*flags=MAP_POPULATE|MAP_LOCKED|MAP_GROWSDOWN|MAP_FIXED|0x22*/ 0xa132,
          /*fd=*/(intptr_t)-1, /*offset=*/0xff46d000);
  return 0;
}