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When decoding the literals section of a compressed block, the length of the regenerated size of the literals must be checked against the buffer literals are decoded into.
alexrp
approved these changes
Mar 31, 2025
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Closes #23413.
This PR fixes an OOB access when the raw literal section in a compressed block claims it has more bytes than the buffer used to store the literals. The added test case uses a slight reduction of the input data described in #23413.
In addition, when the validating a Zstandard frame header ensure that the window size fits into a
usize.