// https://syzkaller.appspot.com/bug?id=8f063539d4ecf1faf3132624b57a641e923ee25a // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include static long syz_open_dev(long a0, long a1, 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 { char buf[1024]; char* hash; strncpy(buf, (char*)a0, sizeof(buf) - 1); buf[sizeof(buf) - 1] = 0; while ((hash = strchr(buf, '#'))) { *hash = '0' + (char)(a1 % 10); a1 /= 10; } return open(buf, a2, 0); } } uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff}; int main(void) { syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); long res = 0; syscall(__NR_fcntl, -1, 0, -1); memcpy((void*)0x20000000, "/dev/kvm", 9); res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20000000, 0, 0); if (res != -1) r[0] = res; res = syscall(__NR_ioctl, r[0], 0xae01, 0); if (res != -1) r[1] = res; res = syscall(__NR_ioctl, r[1], 0xae41, 0); if (res != -1) r[2] = res; *(uint32_t*)0x20000100 = 1; *(uint32_t*)0x20000104 = 0; *(uint32_t*)0x20000108 = 0x40000108; *(uint32_t*)0x2000010c = 0; *(uint64_t*)0x20000110 = 0; syscall(__NR_ioctl, r[2], 0x4080aebf, 0x20000100); memcpy((void*)0x20000940, "/dev/ptmx", 10); syscall(__NR_openat, 0xffffffffffffff9c, 0x20000940, 0, 0); memcpy((void*)0x20000240, "/dev/snd/pcmC#D#p", 18); syz_open_dev(0x20000240, 5, 0x40040); return 0; }