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List: busybox-cvs
Subject: [Bug 15236] New: [1.36] SIGILL on accessing sha256 on some CPUs
From: bugzilla () busybox ! net
Date: 2023-01-08 20:30:06
Message-ID: bug-15236-161 () https ! bugs ! busybox ! net/
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https://bugs.busybox.net/show_bug.cgi?id=15236
Bug ID: 15236
Summary: [1.36] SIGILL on accessing sha256 on some CPUs
Product: Busybox
Version: unspecified
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P5
Component: Other
Assignee: unassigned@busybox.net
Reporter: tonistiigi@gmail.com
CC: busybox-cvs@busybox.net, vda.linux@googlemail.com
Target Milestone: ---
Since 1.36, accessing sha256sum sometimes errors "illegal instruction". v1.35
seems to work properly.
This can be demonstrated in Github Actions infra, which schedules jobs on
different types of CPUs, causing them to fail when they hit the wrong one.
Please see
https://github.com/tonistiigi/gh-busybox-sigill-debug/actions/runs/3858482123/jobs/6577057476
for logs.
In GH infra:
Good CPUs: 8370C, E5-2673
Bad CPUs: 8171M, 8272CL
Likely regression from
https://github.com/mirror/busybox/commit/6472ac942898437e040171cec991de1c0b962f72
but didn't verify.
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