Fix createdump 'stack smashing detected' error on arm64

[mikem8361]

The changes from PR #91865 were reverted by PR #95433.

This change restores the fix from PR #91865 by changing the size back to SpecialDiagInfoSize but uses the 4 parameter MemoryRegion constructor that doesn't assert the address/size is on a PAGE_SIZE alignment (PR #95433).

Issue: #108023

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[mikem8361]

@omajid, is there anyway you could validate this fixes your issue (#108023)?

[mikem8361]

/backport to release/9.0-staging

[github-actions]

Started backporting to release/9.0-staging: https://github.com/dotnet/runtime/actions/runs/11006765531

[github-actions]

@mikem8361 an error occurred while backporting to release/9.0-staging, please check the run log for details!

Error: The specified backport target branch release/9.0-staging wasn't found in the repo.

[mikem8361]

/backport to release/9.0

[github-actions]

Started backporting to release/9.0: https://github.com/dotnet/runtime/actions/runs/11019172723

[omajid]

I can confirm this PR makes things work for me again:

$ uname -m
aarch64
$ cat /etc/os-release 
NAME="Red Hat Enterprise Linux"
VERSION="8.10 (Ootpa)"
ID="rhel"
ID_LIKE="fedora"
VERSION_ID="8.10"
PLATFORM_ID="platform:el8"
PRETTY_NAME="Red Hat Enterprise Linux 8.10 (Ootpa)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:redhat:enterprise_linux:8::baseos"
HOME_URL="https://www.redhat.com/"
DOCUMENTATION_URL="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8"
BUG_REPORT_URL="https://issues.redhat.com/"

REDHAT_BUGZILLA_PRODUCT="Red Hat Enterprise Linux 8"
REDHAT_BUGZILLA_PRODUCT_VERSION=8.10
REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux"
REDHAT_SUPPORT_PRODUCT_VERSION="8.10"
$ ~/dotnet-sdk/dotnet --info
.NET SDK:
 Version:           9.0.100-rc.2.24474.1
 Commit:            1f747cd885
 Workload version:  9.0.100-manifests.934ebbcd
 MSBuild version:   17.12.0-preview-24469-05+1f747cd88

Runtime Environment:
 OS Name:     rhel
 OS Version:  8
 OS Platform: Linux
 RID:         rhel.8.10-arm64
 Base Path:   /home/omajid/dotnet-sdk/sdk/9.0.100-rc.2.24474.1/

.NET workloads installed:
There are no installed workloads to display.
Configured to use loose manifests when installing new manifests.

Host:
  Version:      9.0.0-rtm.24473.2
  Architecture: arm64
  Commit:       static

.NET SDKs installed:
  9.0.100-rc.2.24474.1 [/home/omajid/dotnet-sdk/sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 9.0.0-rtm.24473.16 [/home/omajid/dotnet-sdk/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 9.0.0-rtm.24473.2 [/home/omajid/dotnet-sdk/shared/Microsoft.NETCore.App]

Other architectures found:
  None

Environment variables:
  Not set

global.json file:
  Not found

Learn more:
  https://aka.ms/dotnet/info

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  https://aka.ms/dotnet/download
$ ~/dotnet-sdk/shared/Microsoft.NETCore.App/9.0.0-rtm.24473.2/createdump 357990
[createdump] Gathering state for process 357990 dotnet
[createdump] Writing minidump with heap to file /tmp/coredump.357990
[createdump] Written 339873792 bytes (5186 pages) to core file
[createdump] Target process is alive
[createdump] Dump successfully written in 360ms