syzkaller-repros/linux/2a622455acd7051c6cf85c360cd116118a587726.c

// KASAN: slab-out-of-bounds Read in pdu_read
// https://syzkaller.appspot.com/bug?id=2a622455acd7051c6cf85c360cd116118a587726
// status:fixed
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE
#include <endian.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <sys/syscall.h>
#include <unistd.h>

static void execute_one();
extern unsigned long long procid;

void loop()
{
  while (1) {
    execute_one();
  }
}

uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};
void execute_one()
{
  long res = 0;
  res = syscall(__NR_socket, 0xa, 2, 0);
  if (res != -1)
    r[0] = res;
  *(uint64_t*)0x200001c0 = 0x20000000;
  *(uint16_t*)0x20000000 = 0xa;
  *(uint16_t*)0x20000002 = htobe16(0x4e23);
  *(uint8_t*)0x20000004 = 0xac;
  *(uint8_t*)0x20000005 = 0x14;
  *(uint8_t*)0x20000006 = 0x14;
  *(uint8_t*)0x20000007 = 0xbb;
  *(uint8_t*)0x20000008 = 0;
  *(uint8_t*)0x20000009 = 0;
  *(uint8_t*)0x2000000a = 0;
  *(uint8_t*)0x2000000b = 0;
  *(uint8_t*)0x2000000c = 0;
  *(uint8_t*)0x2000000d = 0;
  *(uint8_t*)0x2000000e = 0;
  *(uint8_t*)0x2000000f = 0;
  *(uint32_t*)0x200001c8 = 0x80;
  *(uint64_t*)0x200001d0 = 0x20000080;
  *(uint64_t*)0x200001d8 = 0;
  *(uint64_t*)0x200001e0 = 0x20000340;
  *(uint64_t*)0x200001e8 = 0;
  *(uint32_t*)0x200001f0 = 0;
  syscall(__NR_sendmsg, r[0], 0x200001c0, 0xfc00);
  memcpy((void*)0x20000180, "./file0", 8);
  res = syscall(__NR_open, 0x20000180, 0x40, 0x40);
  if (res != -1)
    r[1] = res;
  memcpy((void*)0x20000100, "./file0", 8);
  memcpy((void*)0x20000140, "9p", 3);
  memcpy((void*)0x20000280, "trans=fd,", 9);
  memcpy((void*)0x20000289, "rfdno", 5);
  *(uint8_t*)0x2000028e = 0x3d;
  sprintf((char*)0x2000028f, "0x%016llx", (long long)r[1]);
  *(uint8_t*)0x200002a1 = 0x2c;
  memcpy((void*)0x200002a2, "wfdno", 5);
  *(uint8_t*)0x200002a7 = 0x3d;
  sprintf((char*)0x200002a8, "0x%016llx", (long long)r[0]);
  *(uint8_t*)0x200002ba = 0x2c;
  memcpy((void*)0x200002bb, "aname", 5);
  *(uint8_t*)0x200002c0 = 0x3d;
  memcpy((void*)0x200002c1, "(ppp0GPLppp0posix_acl_accessposix_acl_access", 44);
  *(uint8_t*)0x200002ed = 0x2c;
  memcpy((void*)0x200002ee, "access=client", 13);
  *(uint8_t*)0x200002fb = 0x2c;
  memcpy((void*)0x200002fc, "version=9p2000", 14);
  *(uint8_t*)0x2000030a = 0x2c;
  memcpy((void*)0x2000030b, "cache=fscache", 13);
  *(uint8_t*)0x20000318 = 0x2c;
  memcpy((void*)0x20000319, "version=9p2000.L", 16);
  *(uint8_t*)0x20000329 = 0x2c;
  *(uint8_t*)0x2000032a = 0;
  syscall(__NR_mount, 0, 0x20000100, 0x20000140, 0x10000, 0x20000280);
}

int main()
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  for (;;) {
    loop();
  }
}