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win midi: increase BUFFER_INITIAL_SIZE, wait no more than 3 seconds (#1109)

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Avoid midiOutUnprepareHeader() which contains use after free (tested with
ASan).

* manually unset `MHDR_INQUEUE` flag

* never delete buffer

* prepare header for new handle
This commit is contained in:
Roman Fomin 2023-06-19 10:39:27 +07:00 committed by GitHub
parent 01d31eb495
commit 2d296deeb0
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 32 additions and 27 deletions
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59
src/i_winmusic.c
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@ -131,7 +131,9 @@ typedef struct
static win_midi_song_t song;
#define BUFFER_INITIAL_SIZE 1024
#define BUFFER_INITIAL_SIZE 8192
#define PLAYER_THREAD_WAIT_TIME 3000
typedef struct
{
@ -185,13 +187,29 @@ static void CALLBACK MidiStreamProc(HMIDIOUT hMidi, UINT uMsg,
}
}
static void AllocateBuffer(const unsigned int size)
static void PrepareHeader(void)
{
MIDIHDR *hdr = &MidiStreamHdr;
MMRESULT mmr;
hdr->lpData = (LPSTR)buffer.data;
hdr->dwBytesRecorded = 0;
hdr->dwBufferLength = buffer.size;
mmr = midiOutPrepareHeader((HMIDIOUT)hMidiStream, hdr, sizeof(MIDIHDR));
if (mmr != MMSYSERR_NOERROR)
{
MidiError("midiOutPrepareHeader", mmr);
}
}
static void AllocateBuffer(const unsigned int size)
{
if (buffer.data)
{
MIDIHDR *hdr = &MidiStreamHdr;
MMRESULT mmr;
hdr->dwFlags &= ~MHDR_INQUEUE;
mmr = midiOutUnprepareHeader((HMIDIOUT)hMidiStream, hdr, sizeof(MIDIHDR));
if (mmr != MMSYSERR_NOERROR)
{
@ -202,14 +220,7 @@ static void AllocateBuffer(const unsigned int size)
buffer.size = PADDED_SIZE(size);
buffer.data = I_Realloc(buffer.data, buffer.size);
hdr->lpData = (LPSTR)buffer.data;
hdr->dwBytesRecorded = 0;
hdr->dwBufferLength = buffer.size;
mmr = midiOutPrepareHeader((HMIDIOUT)hMidiStream, hdr, sizeof(MIDIHDR));
if (mmr != MMSYSERR_NOERROR)
{
MidiError("midiOutPrepareHeader", mmr);
}
PrepareHeader();
}
static void WriteBufferPad(void)
@ -1424,7 +1435,14 @@ static boolean I_WIN_InitMusic(int device)
return false;
}
AllocateBuffer(BUFFER_INITIAL_SIZE);
if (buffer.data == NULL)
{
AllocateBuffer(BUFFER_INITIAL_SIZE);
}
else
{
PrepareHeader();
}
hBufferReturnEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
hExitEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
@ -1465,7 +1483,7 @@ static void I_WIN_StopSong(void *handle)
}
SetEvent(hExitEvent);
WaitForSingleObject(hPlayerThread, INFINITE);
WaitForSingleObject(hPlayerThread, PLAYER_THREAD_WAIT_TIME);
CloseHandle(hPlayerThread);
hPlayerThread = NULL;
@ -1660,27 +1678,14 @@ static void I_WIN_ShutdownMusic(void)
{
MidiError("midiStreamRestart", mmr);
}
WaitForSingleObject(hBufferReturnEvent, INFINITE);
WaitForSingleObject(hBufferReturnEvent, PLAYER_THREAD_WAIT_TIME);
mmr = midiStreamStop(hMidiStream);
if (mmr != MMSYSERR_NOERROR)
{
MidiError("midiStreamStop", mmr);
}
if (buffer.data)
{
MidiStreamHdr.dwFlags &= ~MHDR_INQUEUE;
mmr = midiOutUnprepareHeader((HMIDIOUT)hMidiStream, &MidiStreamHdr,
sizeof(MIDIHDR));
if (mmr != MMSYSERR_NOERROR)
{
MidiError("midiOutUnprepareHeader", mmr);
}
free(buffer.data);
buffer.data = NULL;
buffer.size = 0;
buffer.position = 0;
}
buffer.position = 0;
mmr = midiStreamClose(hMidiStream);
if (mmr != MMSYSERR_NOERROR)