fix signed overflow in ReadGlyph coordinate accumulation#200
Open
metsw24-max wants to merge 1 commit into
Open
fix signed overflow in ReadGlyph coordinate accumulation#200metsw24-max wants to merge 1 commit into
metsw24-max wants to merge 1 commit into
Conversation
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Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be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.
ReadGlyph in glyph.cc:163 accumulates point deltas into int prev_x/prev_y without an overflow check, so a glyph with enough points pushes the running coordinate past INT_MAX (signed overflow). Guard the four accumulation sites with a checked add, mirroring _SafeIntAddition in the decoder's TripletDecode.