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fix review

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rustdesk
2026-07-04 15:47:53 +08:00
parent b0555639a2
commit f695413ee7
1 changed files with 11 additions and 1 deletions
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12
libs/clipboard/src/windows/wf_cliprdr.c
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@@ -299,6 +299,9 @@ struct wf_clipboard
// the request is sent and read when its response arrives, so no lock is needed for
// it. Used to reject a peer response that claims to return more than requested.
ULONG req_f_size_requested;
// Stream ID of the most recent file-contents request. Responses for another stream
// are ignored so they cannot satisfy the shared single-slot rendezvous.
UINT32 req_f_stream_id_expected;
// Guards the ownership hand-off of the req_fdata/req_fsize buffer between the
// CLIPRDR channel thread (wf_cliprdr_server_file_contents_response, which frees any
// stale buffer and publishes the new one) and the explorer-thread consumers
@@ -1863,7 +1866,7 @@ UINT cliprdr_send_request_filecontents(wfClipboard *clipboard, UINT32 connID, co
ULONG nreq)
{
UINT rc;
CLIPRDR_FILE_CONTENTS_REQUEST fileContentsRequest;
CLIPRDR_FILE_CONTENTS_REQUEST fileContentsRequest = { 0 };
if (!clipboard || !clipboard->context || !clipboard->context->ClientFileContentsRequest)
return ERROR_INTERNAL_ERROR;
@@ -1884,6 +1887,7 @@ UINT cliprdr_send_request_filecontents(wfClipboard *clipboard, UINT32 connID, co
// But it is OK, because it is only used to check if the stream is the same in
// `wf_cliprdr_server_file_contents_request()` function.
fileContentsRequest.streamId = (UINT32)(ULONG_PTR)streamid;
clipboard->req_f_stream_id_expected = fileContentsRequest.streamId;
fileContentsRequest.listIndex = index;
fileContentsRequest.dwFlags = flag;
fileContentsRequest.nPositionLow = positionlow;
@@ -3374,6 +3378,12 @@ wf_cliprdr_server_file_contents_response(CliprdrClientContext *context,
rc = ERROR_INTERNAL_ERROR;
break;
}
// A response for another stream does not belong to the outstanding request.
// Ignore it without touching the shared response slot or waking its waiter.
if (fileContentsResponse->streamId != clipboard->req_f_stream_id_expected)
return CHANNEL_RC_OK;
// Serialize req_fdata / req_fsize access with the explorer-thread consumers
// (CliprdrStream_Read / _New) via req_f_mutex. Held only across the buffer
// manipulation below (never across a blocking wait), and released exactly once