tree fc1ce6d5463a238a2a2d97579b74715b8d7a0b76
parent bb530e4d71680b0ed21d92165235c89dc7e28ec9
author Tom Sepez <tsepez@chromium.org> 1645727434 +0000
committer Pdfium LUCI CQ <pdfium-scoped@luci-project-accounts.iam.gserviceaccount.com> 1645727434 +0000

Fix some arithmetic nits in CBC_CommonBitMatrix.

- make m_bits unsigned to avoid bitwise ops on signed values.
- avoid possibility of UB with signed 1 shifted by 31.
- limit total matrix size to avoid overflows.
- avoid OOB writes in Set().

Change-Id: I8b9f518af34e4ac9a1638f54523797014dc0bfe9
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/90993
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>