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audio: audio_generic_get_buffer_in should honor *size

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The function generic_get_buffer_in currently ignores the *size
parameter and may return a buffer larger than *size.

As a result the variable samples in function
audio_pcm_hw_run_in may underflow. The while loop then most
likely will never termiate.

Buglink: http://bugs.debian.org/948658
Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Message-Id: <20200123074943.6699-9-vr_qemu@t-online.de>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Volker Rümelin 2020-01-23 08:49:43 +01:00 committed by Gerd Hoffmann
parent f03cd06814
commit 599eac4e5a
1 changed files with 2 additions and 1 deletions
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3
audio/audio.c
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@ -1407,7 +1407,8 @@ void *audio_generic_get_buffer_in(HWVoiceIn *hw, size_t *size)
} }
assert(start >= 0 && start < hw->size_emul); assert(start >= 0 && start < hw->size_emul);
*size = MIN(hw->pending_emul, hw->size_emul - start); *size = MIN(*size, hw->pending_emul);
*size = MIN(*size, hw->size_emul - start);
return hw->buf_emul + start; return hw->buf_emul + start;
} }