// https://syzkaller.appspot.com/bug?id=4522c4fb3896c243a66d4bda935f828e80899c2c // autogenerated by syzkaller (http://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include static uintptr_t syz_open_dev(uintptr_t a0, uintptr_t a1, uintptr_t 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)); buf[sizeof(buf) - 1] = 0; while ((hash = strchr(buf, '#'))) { *hash = '0' + (char)(a1 % 10); a1 /= 10; } return open(buf, a2, 0); } } long r[1]; void loop() { memset(r, -1, sizeof(r)); syscall(__NR_mmap, 0x20000000, 0xfff000, 3, 0x32, -1, 0); memcpy((void*)0x20005000, "/dev/sg#", 9); r[0] = syz_open_dev(0x20005000, 0, 0x8002); memcpy((void*)0x20fcafcf, "\xb6\x3d\xb8\x5e\x1e\x8d\x04\x00\x00\x00\xb2\x9d\x00\x54\x06\xec\xff" "\xff\xff\x00\x01\x00\x00\x00\x06\x01\x9b\x97\x2d\x3c\x1d\x4d\x87\x09" "\x67\x8f\xe2\x2c\x9b\x00\x00\x05\x1e\x1f\xae\x1a\x56\x9d\x88", 49); syscall(__NR_write, r[0], 0x20fcafcf, 0x31); *(uint64_t*)0x204d7fa0 = 0x20aaaf6b; *(uint64_t*)0x204d7fa8 = 0x95; syscall(__NR_readv, r[0], 0x204d7fa0, 1); } int main() { loop(); return 0; }