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Validate the number of color attachments in create_render_pipeline #2913

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merged 2 commits into from
Jul 26, 2022

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nical
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@nical nical commented Jul 25, 2022

Checklist

  • Run cargo clippy.
  • Add change to CHANGELOG.md. See simple instructions inside file.

Connections

Found by a fuzzer in https://bugzilla.mozilla.org/show_bug.cgi?id=1780791

Description

create_render_pipeline panics if the number of color attachments is greater than hal::MAX_COLOR_ATTACHMENTS.

This PR checks and returns an error. This validation is also part of the WebGPU spec (although the limit is advertized via a member of GPUSupportedLimits instead of a constant).

Testing

None.

Returns an error instead of panicking when populating an ArrayVec later in the same function.
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LGTM

return Err(
pipeline::CreateRenderPipelineError::TooManyColorAttachments {
given: num_attachments as u32,
limit: hal::MAX_COLOR_ATTACHMENTS as u32,
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Long term we should add this limit

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2 participants