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ksmbd: add validation for FILE_FULL_EA_INFORMATION of smb2_get_info

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Add validation to check whether req->InputBufferLength is smaller than
smb2_ea_info_req structure size.

Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com>
Cc: Ralph Böhme <slow@samba.org>
Cc: Steve French <smfrench@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Namjae Jeon 2021-09-18 18:45:12 +09:00 committed by Steve French
parent f58eae6c5f
commit 6d56262c3d
1 changed files with 4 additions and 0 deletions
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4
fs/ksmbd/smb2pdu.c
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@ -4045,6 +4045,10 @@ static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
path = &fp->filp->f_path;
/* single EA entry is requested with given user.* name */
if (req->InputBufferLength) {
if (le32_to_cpu(req->InputBufferLength) <
sizeof(struct smb2_ea_info_req))
return -EINVAL;
ea_req = (struct smb2_ea_info_req *)req->Buffer;
} else {
/* need to send all EAs, if no specific EA is requested*/