shithub: riscv

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ref: 9e27ee094c25873c71da6488d7926c621c115c68
parent: 6dbecfb457d1625687f2338696c2b8195c831ae4
author: Ori Bernstein <ori@eigenstate.org>
date: Sat Aug 1 06:54:03 EDT 2020

deroff: fix out-of-bounds access if runes above 0X80 are inside EQ clauses (thanks mmnmnnmnmm, via plan9port)

Characters greater than 0X80 will cause a read beyond the bounds of the
array chars[]. For particular unicode characters this can cause deroff
to segfault.

A minimal example:
$ deroff
.EQ
u∈
Segmentation fault

Throughout deroff, charclass() is used instead of directly indexing
chars[] so I presume this was just missed.