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Differential D30771

[UPSTREAM] vis(3) avoid out-of-bounds stack buffer reads
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Authored by arichardson on Jun 15 2021, 12:27 PM.
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F150437667: D30771.id90913.diff
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Details

Reviewers
brooks
bdrewery
jhb
Commits
rGc89f104c12e1: vis(3): avoid out-of-bounds stack buffer reads
rG1a2f06d0f290: vis(3): avoid out-of-bounds stack buffer reads
Summary

I found this while running kdump(1) on a CheriBSD system due to a
capability length violation when printing the /etc/libmap.conf read()
system call: it crashed immediately after printing the first line.

Found by: CHERI

Test Plan

No longer crashes with this change

Diff Detail

Repository
rS FreeBSD src repository - subversion
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No Lint Coverage
Unit
No Test Coverage
Build Status
Buildable 39916
Build 36805: arc lint + arc unit

Revision Contents
Changeset List

PathSize
contrib/
libc-vis/
3 lines

Diff 90913

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contrib/libc-vis/vis.c

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