Commit f6bd4128 authored by Namjae Jeon's avatar Namjae Jeon Committed by Steve French
Browse files

ksmbd: override fsids for smb2_query_info() 



Sangsoo reported that a DAC denial error occurred when accessing
files through the ksmbd thread. This patch override fsids for
smb2_query_info().

Reported-by: default avatarSangsoo Lee <constant.lee@samsung.com>
Signed-off-by: default avatarNamjae Jeon <linkinjeon@kernel.org>
Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
parent a018c1b6

fs/smb/server/smb2pdu.c

+7 −0
Original line number Diff line number Diff line
@@ -5596,6 +5596,11 @@ int smb2_query_info(struct ksmbd_work *work) 


	ksmbd_debug(SMB, "GOT query info request\n");



	if (ksmbd_override_fsids(work)) {

		rc = -ENOMEM;

		goto err_out;

	}



	switch (req->InfoType) {

	case SMB2_O_INFO_FILE:

		ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
@@ -5614,6 +5619,7 @@ int smb2_query_info(struct ksmbd_work *work) 
			    req->InfoType);

		rc = -EOPNOTSUPP;

	}

	ksmbd_revert_fsids(work);



	if (!rc) {

		rsp->StructureSize = cpu_to_le16(9);
@@ -5623,6 +5629,7 @@ int smb2_query_info(struct ksmbd_work *work) 
					le32_to_cpu(rsp->OutputBufferLength));

	}



err_out:

	if (rc < 0) {

		if (rc == -EACCES)

			rsp->hdr.Status = STATUS_ACCESS_DENIED;