if the Channel of a SMB2 WRITE request is
SMB2_CHANNEL_RDMA_V1_INVALIDTE, a client
does not invalidate its memory regions but
ksmbd must do it by sending a SMB2 WRITE response
with IB_WR_SEND_WITH_INV.
But if errors occur while processing a SMB2
READ/WRITE request, ksmbd sends a response
with IB_WR_SEND. So a client could use memory
regions already in use.
Signed-off-by: Hyunchul Lee <hyc.lee@xxxxxxxxx>
---
fs/ksmbd/smb2pdu.c | 76 ++++++++++++++++++++++++++++++----------------
1 file changed, 49 insertions(+), 27 deletions(-)
diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c
index ced8f949a4d6..19355511b777 100644
--- a/fs/ksmbd/smb2pdu.c
+++ b/fs/ksmbd/smb2pdu.c
@@ -6132,18 +6132,6 @@ static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
(struct smb2_buffer_desc_v1 *)&req->Buffer[0];
int err;
- if (work->conn->dialect == SMB30_PROT_ID &&
- req->Channel != SMB2_CHANNEL_RDMA_V1)
- return -EINVAL;
-
- if (req->ReadChannelInfoOffset == 0 ||
- le16_to_cpu(req->ReadChannelInfoLength) < sizeof(*desc))
- return -EINVAL;
-
- work->need_invalidate_rkey =
- (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
- work->remote_key = le32_to_cpu(desc->token);
-
err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
le32_to_cpu(desc->token),
le64_to_cpu(desc->offset),
@@ -6179,6 +6167,28 @@ int smb2_read(struct ksmbd_work *work)
return smb2_read_pipe(work);
}
+ if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
+ req->Channel == SMB2_CHANNEL_RDMA_V1) {
+ struct smb2_buffer_desc_v1 *desc =
+ (struct smb2_buffer_desc_v1 *)&req->Buffer[0];
+
+ if (work->conn->dialect == SMB30_PROT_ID &&
+ req->Channel != SMB2_CHANNEL_RDMA_V1) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ if (req->ReadChannelInfoOffset == 0 ||
+ le16_to_cpu(req->ReadChannelInfoLength) < sizeof(*desc)) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ work->need_invalidate_rkey =
+ (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
+ work->remote_key = le32_to_cpu(desc->token);
+ }
+
fp = ksmbd_lookup_fd_slow(work, le64_to_cpu(req->VolatileFileId),
le64_to_cpu(req->PersistentFileId));
if (!fp) {
@@ -6364,21 +6374,6 @@ static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
desc = (struct smb2_buffer_desc_v1 *)&req->Buffer[0];
- if (work->conn->dialect == SMB30_PROT_ID &&
- req->Channel != SMB2_CHANNEL_RDMA_V1)
- return -EINVAL;
-
- if (req->Length != 0 || req->DataOffset != 0)
- return -EINVAL;
-
- if (req->WriteChannelInfoOffset == 0 ||
- le16_to_cpu(req->WriteChannelInfoLength) < sizeof(*desc))
- return -EINVAL;
-
- work->need_invalidate_rkey =
- (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
- work->remote_key = le32_to_cpu(desc->token);
-
data_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO);
if (!data_buf)
return -ENOMEM;
@@ -6425,6 +6420,33 @@ int smb2_write(struct ksmbd_work *work)
return smb2_write_pipe(work);
}
+ if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
+ req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
+ struct smb2_buffer_desc_v1 *desc =
+ (struct smb2_buffer_desc_v1 *)&req->Buffer[0];
+
+ if (work->conn->dialect == SMB30_PROT_ID &&
+ req->Channel != SMB2_CHANNEL_RDMA_V1) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ if (req->Length != 0 || req->DataOffset != 0) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ if (req->WriteChannelInfoOffset == 0 ||
+ le16_to_cpu(req->WriteChannelInfoLength) < sizeof(*desc)) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ work->need_invalidate_rkey =
+ (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
+ work->remote_key = le32_to_cpu(desc->token);
+ }
+
if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
ksmbd_debug(SMB, "User does not have write permission\n");
err = -EACCES;
--
2.25.1
