Clamp out-of-range unorm inputs#651
Merged
Merged
Conversation
This was referenced Jun 22, 2026
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Unorm inputs are expected to be between 0 and 1, scaled to 0-65535 internally. When input image data is a UNORM8 data source this is guaranteed, as data is passed in using the matching encoding. However, when images are passed in as fp16 or fp32 inputs the data is not constrained. We can end up with out-of-range values and NaNs, which trigger UB when later stored into an integer.
This PR clamps unorm inputs to guarantee they stay in a valid range.
Original issue reported by @sahvx655-wq.