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x86: Avoid integer truncation with large cache sizes (bug 32470)

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This commit is contained in:
Qingqing Li 2025-01-04 15:19:12 +08:00
parent 858b2e67f6
commit 11e72654dc
2 changed files with 54 additions and 1 deletions
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6
glibc.spec
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@ -67,7 +67,7 @@
############################################################################## ##############################################################################
Name: glibc Name: glibc
Version: 2.38 Version: 2.38
Release: 48 Release: 49
Summary: The GNU libc libraries Summary: The GNU libc libraries
License: %{all_license} License: %{all_license}
URL: http://www.gnu.org/software/glibc/ URL: http://www.gnu.org/software/glibc/
@ -250,6 +250,7 @@ Patch160: backport-elf-Introduce-_dl_relocate_object_no_relro.patch
Patch161: backport-elf-Switch-to-main-malloc-after-final-ld.so-self-rel.patch Patch161: backport-elf-Switch-to-main-malloc-after-final-ld.so-self-rel.patch
Patch162: nptl-initialize-rseq-area-prior-to-registration.patch Patch162: nptl-initialize-rseq-area-prior-to-registration.patch
Patch163: nptl-initialize-cpu_id_start-prior-to-rseq-registrat.patch Patch163: nptl-initialize-cpu_id_start-prior-to-rseq-registrat.patch
Patch164: x86-Avoid-integer-truncation-with-large-cache-sizes-.patch
#openEuler patch list #openEuler patch list
Patch9000: turn-default-value-of-x86_rep_stosb_threshold_form_2K_to_1M.patch Patch9000: turn-default-value-of-x86_rep_stosb_threshold_form_2K_to_1M.patch
@ -1465,6 +1466,9 @@ fi
%endif %endif
%changelog %changelog
* Sat Jan 4 2025 Qingqing Li <liqingqing3@huawei.com> - 2.38-49
- x86: Avoid integer truncation with large cache sizes (bug 32470)
* Mon Dec 16 2024 swcompiler <lc@wxiat.com> - 2.38-48 * Mon Dec 16 2024 swcompiler <lc@wxiat.com> - 2.38-48
- Add Sw64 ISA support - Add Sw64 ISA support

49
x86-Avoid-integer-truncation-with-large-cache-sizes-.patch Normal file
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@ -0,0 +1,49 @@
From cf06772360017094b6b8de7cac29bb029df8a974 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)
---
NEWS | 1 +
sysdeps/x86/dl-cacheinfo.h | 4 ++--
2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/NEWS b/NEWS
index 8feb39f1ba..d0815514e0 100644
--- a/NEWS
+++ b/NEWS
@@ -60,6 +60,7 @@ The following bugs are resolved with this release:
[32052] Name space violation in fortify wrappers
[32137] libio: Attempt wide backup free only for non-legacy code
[32231] elf: Change ldconfig auxcache magic number
+ [32470] x86: Avoid integer truncation with large cache sizes
Version 2.38
diff --git a/sysdeps/x86/dl-cacheinfo.h b/sysdeps/x86/dl-cacheinfo.h
index 5ddb35c9d9..6c7740422a 100644
--- a/sysdeps/x86/dl-cacheinfo.h
+++ b/sysdeps/x86/dl-cacheinfo.h
@@ -965,11 +965,11 @@ 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))
{
--
2.27.0