提交 6d9c6d54 编写于 作者: V Volker Lendecke 提交者: Steve French

[CIFS] In SendReceive, move consistency check out of the mutexed region

inbuf->smb_buf_length does not change in in wait_for_free_request() or in
allocate_mid(), so we can check it early.
Signed-off-by: NVolker Lendecke <vl@samba.org>
Acked-by: NJeff Layton <jlayton@redhat.com>
Signed-off-by: NSteve French <sfrench@us.ibm.com>
上级 00e485b0
......@@ -687,6 +687,12 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
to the same server. We may make this configurable later or
use ses->maxReq */
if (in_buf->smb_buf_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
cERROR(1, ("Illegal length, greater than maximum frame, %d",
in_buf->smb_buf_length));
return -EIO;
}
rc = wait_for_free_request(ses, long_op);
if (rc)
return rc;
......@@ -706,17 +712,6 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
return rc;
}
if (in_buf->smb_buf_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
cERROR(1, ("Illegal length, greater than maximum frame, %d",
in_buf->smb_buf_length));
DeleteMidQEntry(midQ);
mutex_unlock(&ses->server->srv_mutex);
/* Update # of requests on wire to server */
atomic_dec(&ses->server->inFlight);
wake_up(&ses->server->request_q);
return -EIO;
}
rc = cifs_sign_smb(in_buf, ses->server, &midQ->sequence_number);
midQ->midState = MID_REQUEST_SUBMITTED;
......@@ -925,6 +920,12 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifsTconInfo *tcon,
to the same server. We may make this configurable later or
use ses->maxReq */
if (in_buf->smb_buf_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
cERROR(1, ("Illegal length, greater than maximum frame, %d",
in_buf->smb_buf_length));
return -EIO;
}
rc = wait_for_free_request(ses, CIFS_BLOCKING_OP);
if (rc)
return rc;
......@@ -941,14 +942,6 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifsTconInfo *tcon,
return rc;
}
if (in_buf->smb_buf_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
mutex_unlock(&ses->server->srv_mutex);
cERROR(1, ("Illegal length, greater than maximum frame, %d",
in_buf->smb_buf_length));
DeleteMidQEntry(midQ);
return -EIO;
}
rc = cifs_sign_smb(in_buf, ses->server, &midQ->sequence_number);
midQ->midState = MID_REQUEST_SUBMITTED;
......
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