Golang runtime: heap mspan limit is set too late, causing data race between span allocation and conservative scanning [1.23 backport]

@mknyszek requested issue #74288 to be considered for backport to the next 1.23 minor release.

@gopherbot Please open backport issues for Go 1.23 and Go 1.24.

This problem can cause rare random crashes in the runtime with no workaround.

Comment From: gopherbot

Change https://go.dev/cl/684096 mentions this issue: [release-branch.go1.23] runtime: set mspan limit field early and eagerly

Comment From: gopherbot

Closed by merging CL 684096 (commit c46a0e690de1b964be1999d1769177f159938226) to release-branch.go1.23.