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mvcdec: Integer overflow in 'ih264d_cavlc_parse_chroma_dc' #91

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AshwinNatesan-ittiam
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According to the spec, the values of both the chroma DC transform outputs and the corresponding quantization outputs should be within -(1 << 15) and ((1 << 15) - 1). This check has been now added to the functions, with an early exit when the constraints are not met.

Bug = ossfuzz:65055
Test: mvc_dec_fuzzer

According to the spec, the values of both the chroma DC
transform outputs and the corresponding quantization
outputs should be within -(1 << 15) and ((1 << 15) - 1).
This check has been now added to the functions, with an
early exit when the constraints are not met.

Bug = ossfuzz:65055
Test: mvc_dec_fuzzer
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@harishdm harishdm left a comment

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As this impacts avc path as well, please put this on hold for now.

@harishdm harishdm marked this pull request as draft December 20, 2023 04:48
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