Opened 9 years ago

Closed 9 years ago

#9203 closed bug (fixed)

Integer overflow in mixer add-on crashes media_addon_server

Reported by: jua Owned by: axeld
Priority: normal Milestone: R1
Component: Kits/Media Kit Version: R1/alpha4.1
Keywords: mixer.media_addon media_addon_server Cc:
Blocked By: Blocking:
Platform: All


When using an audio device with high sample rate and a BSoundPlayer with a large buffer, an integer overflow in MixerInput::BufferReceived() in the mixer.media_addon crashes the media_addon_server.

The overflow happens due to wrong casting, I'm attaching a patch which fixes it.

If you look at the line changed by the patch: when fMixBufferFrameRate is 192000 (hda chooses 192kHz as default sample rate for my onboard sound) and in_frames is 16384 (i.e. quite large buffer), the result of the multiplication is 3145728000 which is too large for int32 -- and the cast to double happens only after the multiply. The patch changes it so the cast happens before.

Attachments (1)

Fix-MixerInput-overflow.patch (1002 bytes ) - added by jua 9 years ago.
Fix integer overflow in MixerInput

Download all attachments as: .zip

Change History (4)

by jua, 9 years ago

Fix integer overflow in MixerInput

comment:1 by jua, 9 years ago

patch: 01

comment:2 by korli, 9 years ago

Looks good (at least for Haiku 32bits).

comment:3 by korli, 9 years ago

Resolution: fixed
Status: newclosed

Applied in hrev45175. Thanks!

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