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sh: Don't add something to a null pointer
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Authored by jilles on Jan 23 2022, 9:28 PM.
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Details

Summary

Pointer arithmetic on a null pointer is undefined behavior.

The bug can be reproduced by running bin/sh/tests/builtins/wait6.0 with
UBSAN.

Test Plan

kyua test

Diff Detail

Repository
rG FreeBSD src repository
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Unit
Tests Not Applicable