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ksmbd: validate compound response buffer

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Add the check to validate compound response buffer.

Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Namjae Jeon 2021-10-11 19:15:25 +09:00 committed by Steve French
parent 9a63b999ae
commit dbad63001e
1 changed files with 6 additions and 0 deletions
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6
fs/ksmbd/smb2pdu.c
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@ -449,6 +449,12 @@ bool is_chained_smb2_message(struct ksmbd_work *work)
return false;
}
if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE >
work->response_sz) {
pr_err("next response offset exceeds response buffer size\n");
return false;
}
ksmbd_debug(SMB, "got SMB2 chained command\n");
init_chained_smb2_rsp(work);
return true;