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UBSan crash with zero-length input #11737

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szhorvat opened this issue Mar 27, 2024 · 0 comments

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szhorvat commented Mar 27, 2024

We are suddenly getting unreproducible UBSan crashes with zero-length input, see https://oss-fuzz.com/testcase-detail/4680147175276544 The crash seems to happen not in our code, but specifically in UBSan.

Unreproducible crashes on zero-length input were a long-standing problem on i386 (see #7421) but I never saw them on x86_64.

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