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Tue, 7 Apr 2020 09:22:09 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id 1FD8317516; Tue, 7 Apr 2020 11:22:07 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1586251336; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=MScHmYDiUSa4Iqbzbrlr05FKQfpiha1WluPabMnn3LQ=; b=dkDWoDkn+101UksN6Pp6D+sYa+95CGowZkNpKbj7G0etjPiZIkyYPY/CiOFnIyHHoOXl9e BbUWlcAzTRgEzCe34Lza4S7/ozOcBzfg65MfYE/8MibvhHJOGgB5WCtut6jo/X10c9COE6 DaN0Wuy2PeVzmpYIrRAxHhXXdfglVis= X-MC-Unique: jvTXjx1kPxSlJY7o6sX45g-1 From: Gerd Hoffmann To: qemu-devel@nongnu.org Subject: [PULL 3/4] dsoundaudio: dsound_get_buffer_in should honor *size Date: Tue, 7 Apr 2020 11:22:05 +0200 Message-Id: <20200407092207.6079-4-kraxel@redhat.com> In-Reply-To: <20200407092207.6079-1-kraxel@redhat.com> References: <20200407092207.6079-1-kraxel@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 205.139.110.120 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?UTF-8?q?Volker=20R=C3=BCmelin?= , Gerd Hoffmann Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" From: Volker R=C3=BCmelin This patch prevents an underflow of variable samples in function audio_pcm_hw_run_in(). See commit 599eac4e5a "audio: audio_generic_get_buffer_in should honor *size". This time the while loop in audio_pcm_hw_run_in() will terminate nevertheless, because it seems the recording stream in Windows is always rate limited. Signed-off-by: Volker R=C3=BCmelin Message-id: 20200405075017.9901-3-vr_qemu@t-online.de Signed-off-by: Gerd Hoffmann --- audio/audio.c | 12 +++++------- audio/dsoundaudio.c | 2 +- 2 files changed, 6 insertions(+), 8 deletions(-) diff --git a/audio/audio.c b/audio/audio.c index 9ac9a20c41ba..7a9e6803558b 100644 --- a/audio/audio.c +++ b/audio/audio.c @@ -1491,16 +1491,14 @@ size_t audio_generic_write(HWVoiceOut *hw, void *bu= f, size_t size) =20 size_t audio_generic_read(HWVoiceIn *hw, void *buf, size_t size) { - size_t src_size, copy_size; - void *src =3D hw->pcm_ops->get_buffer_in(hw, &src_size); - copy_size =3D MIN(size, src_size); + void *src =3D hw->pcm_ops->get_buffer_in(hw, &size); =20 - memcpy(buf, src, copy_size); - hw->pcm_ops->put_buffer_in(hw, src, copy_size); - return copy_size; + memcpy(buf, src, size); + hw->pcm_ops->put_buffer_in(hw, src, size); + + return size; } =20 - static int audio_driver_init(AudioState *s, struct audio_driver *drv, bool msg, Audiodev *dev) { diff --git a/audio/dsoundaudio.c b/audio/dsoundaudio.c index a08d519cae6a..4cdf19ab6799 100644 --- a/audio/dsoundaudio.c +++ b/audio/dsoundaudio.c @@ -540,7 +540,7 @@ static void *dsound_get_buffer_in(HWVoiceIn *hw, size_t= *size) } =20 req_size =3D audio_ring_dist(cpos, hw->pos_emul, hw->size_emul); - req_size =3D MIN(req_size, hw->size_emul - hw->pos_emul); + req_size =3D MIN(*size, MIN(req_size, hw->size_emul - hw->pos_emul)); =20 if (req_size =3D=3D 0) { *size =3D 0; --=20 2.18.2