GNU bug report logs - #64058
[PATCH] wc: Fix crashes due to incomplete AVX2 enumeration

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Dave Hansen <dave.hansen <at> linux.intel.com>
Cc: Kristoffer Brånemyr <ztion1 <at> yahoo.se>, 64058 <at> debbugs.gnu.org
Subject: bug#64058: [PATCH] wc: Fix crashes due to incomplete AVX2 enumeration
Date: Tue, 13 Jun 2023 21:14:55 -0700

[Message part 1 (text/plain, inline)]

Thanks for the bug report. I installed the attached patch into coreutils 
on Savannah. It builds on your idea with several other changes:

* There's a similar issue with cksum.c and pclmul.

* configure.ac can be simplified, since it seems there's no point 
compiling these instructions if __builtin_cpu_supports doesn't work.

* This lets us simplify the source code a bit more.

Please let me know if the attached patch works for you.

PS. Does the attached cksum.c / pclmul change fix any user-visible 
misbehavior? If so, what should we put into the NEWS file?

[0001-wc-port-to-kernels-that-disable-XSAVE-YMM.patch (text/x-patch, attachment)]

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