> You need to consider Ciphers flex-array size to validate ctxt_len. we
> can get its size using CipherCount in smb2_encryption_neg_context.
I'm not checking the flex-array size since both `decode_sign_cap_ctxt()`
and `decode_encrypt_ctxt()` have done it, or should I move it out?
```
if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
len_of_ctxts) {
pr_err("Invalid cipher count(%d)\n", cph_cnt);
return;
}
```
```
if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
len_of_ctxts) {
pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
return;
}
```
