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Backport patch from upstream BZ #32470

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This commit is contained in:
Koichiro Iwao 2024-12-23 14:56:58 +09:00
parent fac5235c85
commit d24a52b4ef
2 changed files with 44 additions and 1 deletions
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36
SOURCES/glibc-upstream-2.39-bz-32470.patch Normal file
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@ -0,0 +1,36 @@
From 2c8a7f14fac3628b6a06cc76cdfda54a7ac20386 Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Tue, 17 Dec 2024 18:12:03 +0100
Subject: [PATCH] x86: Avoid integer truncation with large cache sizes (bug
32470)
Some hypervisors report 1 TiB L3 cache size. This results
in some variables incorrectly getting zeroed, causing crashes
in memcpy/memmove because invariants are violated.
(cherry picked from commit 61c3450db96dce96ad2b24b4f0b548e6a46d68e5)
---
sysdeps/x86/dl-cacheinfo.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/sysdeps/x86/dl-cacheinfo.h b/sysdeps/x86/dl-cacheinfo.h
index 5a98f70364..1f68968a9a 100644
--- a/sysdeps/x86/dl-cacheinfo.h
+++ b/sysdeps/x86/dl-cacheinfo.h
@@ -959,11 +959,11 @@ dl_init_cacheinfo (struct cpu_features *cpu_features)
non_temporal_threshold = maximum_non_temporal_threshold;
/* NB: The REP MOVSB threshold must be greater than VEC_SIZE * 8. */
- unsigned int minimum_rep_movsb_threshold;
+ unsigned long int minimum_rep_movsb_threshold;
/* NB: The default REP MOVSB threshold is 4096 * (VEC_SIZE / 16) for
VEC_SIZE == 64 or 32. For VEC_SIZE == 16, the default REP MOVSB
threshold is 2048 * (VEC_SIZE / 16). */
- unsigned int rep_movsb_threshold;
+ unsigned long int rep_movsb_threshold;
if (CPU_FEATURE_USABLE_P (cpu_features, AVX512F)
&& !CPU_FEATURE_PREFERRED_P (cpu_features, Prefer_No_AVX512))
{
--
2.46.2

9
SPECS/glibc.spec
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@ -171,7 +171,7 @@ Version: %{glibcversion}
# generator to make the generated requires interchangeable between Rawhide
# and ELN (.elnYY < .fcXX).
%global baserelease 17
Release: %{baserelease}%{?dist}.alma.2
Release: %{baserelease}%{?dist}.alma.3
# Licenses:
#
@ -408,6 +408,9 @@ Patch96: glibc-upstream-2.39-72.patch
# NEWS update: glibc-upstream-2.39-74.patch
Patch97: glibc-upstream-2.39-75.patch
# AlmaLinux backport: https://sourceware.org/bugzilla/show_bug.cgi?id=32470
Patch1000: glibc-upstream-2.39-bz-32470.patch
##############################################################################
# Continued list of core "glibc" package information:
##############################################################################
@ -2635,6 +2638,10 @@ update_gconv_modules_cache ()
%endif
%changelog
* Mon Dec 23 2024 Koichiro Iwao <meta@almalinux.org> - 2.39-17.alma.3
- Re-apply reverted patch in 2.39-17.alma.2
- Apply patch from upstream BZ #32480
* Tue Dec 03 2024 Koichiro Iwao <meta@almalinux.org> - 2.39-17.alma.2
- Revert: x86: Fix Zen3/Zen4 ERMS selection