https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=patch;h=9aaaab7c6e4176e61c59b0a63c6ba906d875dc0e
with the ChangeLog removed

From 9aaaab7c6e4176e61c59b0a63c6ba906d875dc0e Mon Sep 17 00:00:00 2001
From: Andreas Schwab <schwab@suse.de>
Date: Tue, 22 May 2018 10:37:59 +0200
Subject: [PATCH] Don't write beyond destination in
 __mempcpy_avx512_no_vzeroupper (bug 23196)

When compiled as mempcpy, the return value is the end of the destination
buffer, thus it cannot be used to refer to the start of it.
---
 ChangeLog                                               | 9 +++++++++
 string/test-mempcpy.c                                   | 1 +
 sysdeps/x86_64/multiarch/memmove-avx512-no-vzeroupper.S | 5 +++--
 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/string/test-mempcpy.c b/string/test-mempcpy.c
index c08fba8..d98ecdd 100644
--- a/string/test-mempcpy.c
+++ b/string/test-mempcpy.c
@@ -18,6 +18,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 #define MEMCPY_RESULT(dst, len) (dst) + (len)
+#define MIN_PAGE_SIZE 131072
 #define TEST_MAIN
 #define TEST_NAME "mempcpy"
 #include "test-string.h"
diff --git a/sysdeps/x86_64/multiarch/memmove-avx512-no-vzeroupper.S b/sysdeps/x86_64/multiarch/memmove-avx512-no-vzeroupper.S
index 23c0f7a..effc3ac 100644
--- a/sysdeps/x86_64/multiarch/memmove-avx512-no-vzeroupper.S
+++ b/sysdeps/x86_64/multiarch/memmove-avx512-no-vzeroupper.S
@@ -336,6 +336,7 @@ L(preloop_large):
 	vmovups	(%rsi), %zmm4
 	vmovups	0x40(%rsi), %zmm5
 
+	mov	%rdi, %r11
 /* Align destination for access with non-temporal stores in the loop.  */
 	mov	%rdi, %r8
 	and	$-0x80, %rdi
@@ -366,8 +367,8 @@ L(gobble_256bytes_nt_loop):
 	cmp	$256, %rdx
 	ja	L(gobble_256bytes_nt_loop)
 	sfence
-	vmovups	%zmm4, (%rax)
-	vmovups	%zmm5, 0x40(%rax)
+	vmovups	%zmm4, (%r11)
+	vmovups	%zmm5, 0x40(%r11)
 	jmp	L(check)
 
 L(preloop_large_bkw):
-- 
2.9.3

on value='committer'>committer</option>
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</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=5c3e3fe2594cee970372246f51732b76f843cf3e&amp;showmsg=1'>root</a>/<a href='/guix/log/gnu?id=5c3e3fe2594cee970372246f51732b76f843cf3e&amp;showmsg=1'>gnu</a>/<a href='/guix/log/gnu/tests?id=5c3e3fe2594cee970372246f51732b76f843cf3e&amp;showmsg=1'>tests</a>/<a href='/guix/log/gnu/tests/vnc.scm?id=5c3e3fe2594cee970372246f51732b76f843cf3e&amp;showmsg=1'>vnc.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/tests/vnc.scm?id=5c3e3fe2594cee970372246f51732b76f843cf3e'>Collapse</a>)</th><th class='left'>Author</th></tr>
<tr class='logheader'><td><span title='2022-10-07 15:08:05 -0400'>2022-10-07</span></td><td class='logsubject'><a href='/guix/commit/gnu/tests/vnc.scm?id=0169aee33e154c1fa8b299c7f126f3e94a8dc9a4'>tests: xvnc: Do not use specification-&gt;package in OS definition.</a></td><td>Maxim Cournoyer</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
Doing so would cause the extra package dependencies to not be
correctly registered as dependencies, which would lead to a silent
failure when attempting to load or byte compile the module at the time
guix build itself (e.g., when running 'guix pull').

* gnu/tests/vnc.scm (%xvnc-os) [packages]: Turn the the
specification-&gt;package declaration into a list of package objects.


</td></tr>
<tr class='logheader'><td><span title='2022-10-07 15:07:48 -0400'>2022-10-07</span></td><td class='logsubject'><a href='/guix/commit/gnu/tests/vnc.scm?id=00e843050012961e9cc41b003ea9271eab718541'>Revert "Revert "services: Add xvnc-service-type.""</a></td><td>Maxim Cournoyer</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
This reverts commit 0c4966160054bc50e6ab3a4ac9c9a6a1826ab5a0.  The fix appears
in the subsequent commit, for clarity.


</td></tr>
<tr class='logheader'><td><span title='2022-10-07 12:53:22 -0400'>2022-10-07</span></td><td class='logsubject'><a href='/guix/commit/gnu/tests/vnc.scm?id=0c4966160054bc50e6ab3a4ac9c9a6a1826ab5a0'>Revert "services: Add xvnc-service-type."</a></td><td>Maxim Cournoyer</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
This reverts commit 1c528a95cb92b7808e6603d7956185005583629f.  This broke
'guix pull', for (yet) unknown reasons.


</td></tr>
<tr class='logheader'><td><span title='2022-10-07 10:11:13 -0400'>2022-10-07</span></td><td class='logsubject'><a href='/guix/commit/gnu/tests/vnc.scm?id=1c528a95cb92b7808e6603d7956185005583629f'>services: Add xvnc-service-type.</a></td><td>Maxim Cournoyer</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* gnu/services/vnc.scm: New file.
* gnu/tests/vnc.scm: Likewise.
* gnu/local.mk: Register them.


</td></tr>